Recycling methods and recycled products

Abstract

Described herein are specific methods for the processing of polymer blends. The resulting materials can be transformed to obtain specific materials and products.

Description

[Technical Field]

[0001] The present invention relates to a process for separating a polymer PM1 (e.g., a polyamide) from a polymer blend PB1 containing a polymer PM1 (e.g., a polyurethane or polyurea) and a further polymer PM2 (e.g., a polyurethane or polyurea) using a specific solvent S1 to obtain a polymer blend PB2. In addition, the present invention relates to the polymer blend PB2 itself, which differs from conventional polymer blends PB1 due to the separation process. Furthermore, the present invention relates to a polymer product PP1 containing the polymer blend PB2.

[0002] The dynamic growth of the polymer manufacturing industry, coupled with the concomitant increase in the problem of removing and recycling polymer waste or rejects, has led to considerable interest, for ecological and economic reasons, in industrially utilizing the ever-increasing amount of polymer waste.

[0003] Polymer blends are difficult to recycle because not all waste components can be recycled through the same process. Examples of polymer blends include shoe scraps, mixed fiber materials, or composite materials. Conventional polar organic solvents cannot be used on an industrial scale due to their cost, toxicity, explosion risk, and high boiling point. Therefore, there is a need for an energy-efficient, non-toxic separation process that selectively separates the polymers present in polymer blends.

[0004] In particular, blended fibers containing polyamide and polyurethane or polyurea (elastane) are problematic for the textile industry, as the polyamide fibers cannot be recycled since they are already slightly contaminated by the polyurethane or polyurea (elastane).

[0005] Therefore, it is an object of the present invention to provide an improved method for processing and separating polymer blends. In addition, the present invention provides an improved method for obtaining polymer (blend) or polymer products with improved reusability and processability. Thus, it is possible to close the recycling loop of polymers, such as polyamides, polyurethanes and / or polyureas.

[0006] This object is at least partly solved by a method comprising the following steps: providing a polymer blend PB1 and a solvent S1; Polymer blend PB1 is i) a polymer PM1; ii) polymer PM2; and Including, Solvent S1 is i) a solvent SO1; ii) preferably a solvent, SO2; Including, Preferably, solvent SO1 and solvent SO2 are not the same, the solubility (g / L) of polymer PM1 in solvent S1 is lower than the solubility (g / L) of polymer PM2 in solvent S1; contacting the polymer blend PB1 with a solvent S1 to obtain a mixture MI1; and Preferably, separating the mixture MI1 to obtain a polymer blend PB2 comprising the polymer PM1 and a solvent S2 comprising the polymer PM2.

[0007] The conditions for the contacting step are not particularly limited. Preferably, the contacting step satisfies one or more of the following conditions: i) the polymer blend PB1 and the solvent S1 are stirred and / or sonicated at least once, preferably for a time t1; ii) polymer blend PB1 and solvent S1 are in contact for a time t1; iii) the polymer blend PB1 and solvent S1 are heated at least once to a temperature T1, preferably for a time t1; Here, the time t1 is 0.1 seconds or more and 7 days or less, preferably 1 minute or more and 48 hours or less, more preferably 1 hour or more and 32 hours or less, and even more preferably 10 hours or more and 20 hours or less, The temperature T1 of the polymer PM1 measured by DSC is 0°C or higher and lower than Tm, preferably 5°C or higher and 250°C or lower, more preferably 10°C or higher and 200°C or lower, even more preferably 12°C or higher and 85°C or lower, even more preferably 15°C or higher and 75°C or lower, even more preferably 17°C or higher and 65°C or lower, even more preferably 20°C or higher and 60°C or lower, even more preferably 25°C or higher and 55°C or lower, and even more preferably 30°C or higher and 50°C or lower.

[0008] In particular, contacting polymer blend PB1 with solvent S1 for at least 1 minute, preferably at least 1 hour, and more preferably at least 10 hours further improves separation. Additionally, the inventors surprisingly discovered that heating polymer blend PB1 and solvent S1 at least once to at least 20°C, preferably at least 25°C, and more preferably at least 30°C, further improves dissolution of polymer PM2. In addition, particularly when solvents SO1 and SO2 are used, the heating temperature T1 can be reduced to 85°C or less, preferably 75°C or less, more preferably 65°C or less, more preferably 60°C or less, more preferably 55°C or less, and even more preferably 50°C or less. Therefore, the overall performance of the method is further improved. The order of contacting polymer blend PB1 with solvents SO1 and SO2 is not particularly limited. Preferably, solvents SO1 and SO2 are mixed first, and then contacted with polymer blend PB1. Therefore, equilibrium of mixture MI1 can be achieved more quickly. However, according to another preferred embodiment of the present invention, first the polymer blend PB1 is contacted with the solvent SO1, and then the solvent SO2 is added.

[0009] In a preferred embodiment, the method further comprises the steps of: Separating the mixture MI1 to obtain a polymer blend PB2 comprising polymer PM1 and a solvent S2 comprising polymer PM2.

[0010] The separation method is not particularly limited. Preferably, separation of the mixture MI1 to obtain a polymer blend PB2 containing the polymer PM1 and a solvent S2 containing the polymer PM2 is preferably a physical separation method in which the mixture MI1 is filtered and / or decanted to obtain the polymer blend PB2 containing the polymer PM1 and the solvent S2 containing the polymer PM2. In particular, separation of the polymer blend PB2 and the solvent S2 by filtration can improve the yield.

[0011] The ratio [weight / weight] of polymer blend PB1 to solvent S1 during the contacting step is not particularly limited. Preferably, the ratio [weight / weight] of polymer blend PB1 to solvent S1 during the contacting step is 0.001 to 1000, preferably 0.005 to 50, more preferably 0.01 to 25, even more preferably 0.02 to 15, even more preferably 0.03 to 10, even more preferably 0.04 to 5, even more preferably 0.05 to 4, even more preferably 0.06 to 3, even more preferably 0.07 to 2, even more preferably 0.08 to 1, even more preferably 0.09 to 0.5, even more preferably 0.10 to 0.15, and even more preferably about 0.1.

[0012] In particular, dissolution is improved when the ratio is 4 or less, preferably 3 or less, more preferably 2 or less, even more preferably 1 or less, even more preferably 0.5 or less, even more preferably 0.15 or less, and even more preferably 0.1 or less. Furthermore, overall performance is further improved when the ratio is 0.001 or more, preferably 0.005 or more, even more preferably 0.01 or more, even more preferably 0.02 or more, even more preferably 0.03 or more, even more preferably 0.04 or more, even more preferably 0.05 or more, even more preferably 0.06 or more, even more preferably 0.07 or more, even more preferably 0.08 or more, even more preferably 0.09 or more, even more preferably 0.10 or more, and even more preferably 0.1 or more.

[0013] In a preferred embodiment, the method further comprises one or both of the following steps: washing the polymer blend PB2 with solvent S1 to obtain a washed polymer blend PB2; and / or Preferably by contact drying, convection drying, or radiation drying, drying the polymer blend PB2; and / or wherein the drying step is carried out under one or more of the following conditions: a pressure of 0.01 mbar to 1013 mbar, preferably 0.05 mbar to 500 mbar, more preferably 0.1 mbar to 200 mbar; a temperature of 0°C or higher and lower than Tm of polymer PM1 measured by DSC, preferably 15°C or higher and 250°C or lower, more preferably 20°C or higher and 180°C or lower, even more preferably 40°C or higher and 130°C or lower, and even more preferably 50°C or higher and 100°C or lower; In an atmosphere having at least 90% by volume nitrogen, preferably at least 95% by volume, more preferably at least 98% by volume, and even more preferably about 100% by volume.

[0014] This allows further improvement of the purity and quality of polymer blend PB2.

[0015] In a preferred embodiment, the method is a method for treating polymer blend PB1, and / or a method for recycling polymer blend PB1, and / or a method for producing a monomer, preferably monomer MO1 and / or monomer MO2 and / or monomer MO3, and / or a polymer, preferably polymer PM3 and / or polymer PM4, and / or a polymer product, preferably polymer product PP1 and / or polymer product PP2 and / or polymer product PP3 and / or polymer product PP4, and / or a polyol composition, preferably polyol composition PC1.

[0016] The resulting polymer blend PB2 and / or solvent S2 can be further processed by several methods. Some methods for conversion are well known to those skilled in the art, such as T.A. Osswald, E. Baur, N. Rudolph, Plastics Handbook, 5th Revised Edition (2019), ISBN: 9781569905593; Biobasierte und bioabbaubare Kunststoffe, 2nd Edition (2019), ISBN: 9783410296348; N. Niessner, Recycling of Plastics, 1st Edition (2022), ISBN 978-1569908563, WO 2022067251 and WO 2020163256. Those skilled in the art will also understand that depending on the recycling method, the polymer product, e.g., polymer product PP1, must contain certain components; for example, if polymer blend PB1 containing polymer PM1 is formed into polymer product PP1, polymer product PP1 must also contain polymer PM1. In contrast, if polymer blend PB1 is converted to polymer product PP1 by pyrolysis, product PP1 must not contain polymer PM1, but may contain polymer PM1.

[0017] Therefore, preferably, the method further comprises the steps of: Converting solvent S2 to obtain a monomer, preferably monomer MO1 and / or monomer MO2, and / or a polymer, preferably polymer PM3 and / or polymer PM4, and / or a polymer product, preferably polymer product PP1 and / or polymer product PP2 and / or polymer product PP3 and / or polymer product PP4, and / or a polyol composition, preferably polyol composition PC1.

[0018] In a preferred embodiment, the converting step comprises the steps of: adding water to the solvent S2 until the polymer PM2 precipitates, resulting in the polymer PM4.

[0019] Those skilled in the art will understand that polymer PM2 and polymer PM4 (precipitated and / or recycled polymer PM2) are the same.

[0020] In a further preferred embodiment, the converting step comprises the steps of: Removing a solvent, preferably solvent SO1, more preferably solvent SO1 and solvent SO2, from solvent S2 to obtain polymer PM4.

[0021] In a further preferred embodiment, preferably where the polymer PM2 and / or the polymer PM4 are polyurethanes, the converting step comprises the following steps: Depolymerizing the polymer PM4 to obtain a mixture MI2 comprising the monomer MO2, preferably and the polyol composition PC1, preferably by depolymerization by a method selected from hydrolysis, glycolysis, hydrogenation or by aminolysis.

[0022] In a further preferred embodiment, preferably where the polymer PM2 and / or the polymer PM4 are polyurethanes, the converting step comprises the following steps: screening and / or purifying and / or separating the mixture MI2 obtained by depolymerization of the polymer PM4 to obtain the monomer MO2 and / or the polyol composition PC1;

[0023] In a further preferred embodiment, the converting step comprises the steps of: Polymerization of a monomer MO2, preferably containing an isocyanate group or an amine derivative thereof, with a molecule containing an OH-group to obtain a polymer PM3, preferably a polyurethane; and / or Polymerization of the polyol composition PC1, optionally together with a further monomer MO4 and / or optionally together with an additive A1, with a monomer containing a group reactive with an OH group, preferably a monomer containing an isocyanate group, to obtain a polymer PM3, preferably a polyurethane.

[0024] Not only can the solvent S2 be further processed, but also the polymer blend PB2 obtained according to the method described herein. Preferably, the method therefore comprises the following steps: Converting polymer blend PB2 to obtain monomers, preferably monomers MO1 and / or monomers MO3, and / or polymers, preferably polymer PM3, and / or polymer products, preferably polymer product PP1 and / or polymer product PP2 and / or polymer product PP3 and / or polymer product PP4.

[0025] In a preferred embodiment, the converting step comprises the steps of: Biodegrading the polymer blend PB2 and / or the solvent S2 and / or the polymer PM4 to obtain biomass BM1, Optionally, converting the biomass BM1 in monomer precursor MP1, and Transforming biomass BM1 and / or monomer precursor MP1 to obtain monomer MO1.

[0026] In another preferred embodiment, the converting step comprises the steps of: pyrolysis of the polymer blend PB2 and / or the solvent S2 and / or the polymer PM4 to obtain pyrolysis oil and / or pyrolysis gas PY1; steam cracking the pyrolysis oil and / or pyrolysis gas PY1 to obtain a monomer precursor MP1; Transformation of the monomer precursor MP1 to obtain the monomer MO1, which allows for the production of highly pure monomer MO1.

[0027] In another preferred embodiment, the converting step comprises the steps of: depolymerizing the polymer blend PB2 to obtain a mixture MI3 comprising at least one monomer MO3; and Preferably, the mixture MI3 is screened and / or purified and / or separated to obtain the monomer MO3.

[0028] This allows the production of extremely pure monomer MO2.

[0029] In another preferred embodiment, the converting step comprises the steps of: Polymerizing the mixture MI2 and / or the mixture MI3 and / or the monomers MO1 and / or the monomers MO2 and / or the monomers MO3, optionally together with a further monomer MO4 and / or optionally together with an additive A1, to obtain a polymer PM3.

[0030] In another preferred embodiment, the converting step comprises the steps of: forming polymer PM3 and / or polymer PM4 and / or polymer blend PB2, preferably together with further polymers and / or additives, to obtain a polymer product, preferably polymer product PP1 and / or polymer product PP2 and / or polymer product PP3 and / or polymer product PP4.

[0031] Thus, for example, the polymer blend PB2 obtained according to the methods described herein can be directly formed to give the polymer product PP1, ie, mechanical recycling of the polymer blend PB2.

[0032] The method described herein makes it possible to close the entire recycling loop of the polymer blend. As a result, the method described herein can be repeated one or more times. Thus, preferably, the method further comprises the steps of: A process in which the previous process is repeated one or more times.

[0033] In addition, the polymer blend PB1 can be treated according to the method described herein and then further recycled by a further (different) method. Thus, preferably, said method comprises: repeating the method described herein one or more times to obtain a polymer product PP2, preferably wherein the content of polymer product PP1 in the polymer product PP2 is content CO1; a step of recycling the polymer product PP1 one or more times to obtain a polymer product PP3, wherein the content of the polymer product PP1 in the polymer product PP3 is preferably the content CO1; recycling the polymer product PP1 one or more times to obtain a recycled material RM1, and converting or forming the recycled material RM1 to obtain a polymer product PP4 comprising the recycled material RM1, preferably wherein the content of the polymer product PP1 and / or the recycled material RM1 in the polymer product PP4 is the content CO1; The content CO1 is 1% by weight or more, preferably 2% by weight or more, more preferably 5% by weight or more, more preferably 15% by weight or more, more preferably 30% by weight or more, more preferably 40% by weight or more, more preferably 60% by weight or more, more preferably 80% by weight or more, more preferably 90% by weight or more, more preferably 95% by weight or more, and / or preferably and Preferably, the content CO1 is 100% by weight or less, preferably 95% by weight or less, even more preferably 90% by weight or less, even more preferably 50% by weight or less, even more preferably 25% by weight or less, even more preferably 10% by weight or less, Preferably, polymer product PP1 and polymer products PP2, PP3 and / or PP4 are the same.

[0034] In particular, when the CO1 content is 30% by weight or more, preferably 40% by weight or more, more preferably 60% by weight or more, even more preferably 80% by weight or more, even more preferably 90% by weight or more, even more preferably 95% by weight or more, a polymer product with improved properties, in particular improved recyclability, can be obtained.

[0035] In a further preferred embodiment, the method further comprises the steps of: Certifying the polymers PM1, PM2, PM3 and / or PM4 and / or polymer blend PB2 and / or polymer products PP1, PP2, PP3 and / or PP4 as circular in accordance with standards or protocols, preferably based on identity preservation, and / or segregation, and / or mass balance, and / or book and claim chain of custody models, preferably mass balance, preferably based on the International Sustainability Carbon Certification (ISCC) standard.

[0036] According to a further aspect, the present invention also relates to a polymer PM4 obtained or obtainable by the method described herein.

[0037] According to the present invention, it is also possible to use the polymer PM4 described herein and / or the polymer PM4 obtained or obtainable by the method described herein for the production of a polymer, preferably the polymer product PP1, and / or in a recycling process.

[0038] According to a further aspect, the present invention also relates to a polyol composition PC1 obtained or obtainable by the process described herein.

[0039] According to the present invention, it is also possible to use the polyol composition PC1 described herein and / or the polyol composition PC1 obtained or obtainable by the method described herein for the production of a polymer, preferably a polymer product PP1, and / or in a recycling process.

[0040] According to a further aspect, the present invention also relates to a polymer blend PB2 obtained or obtainable by the method described herein, preferably comprising polymer PM1.

[0041] According to the present invention, it is also possible to use the polymer blend PB2 described herein and / or the polymer blend PB2 obtained or obtainable by the method described herein for the production of a polymer, preferably a polymer product PP1, and / or in a recycling process.

[0042] According to a further aspect, the present invention also relates to a polymer PM3 obtained or obtainable by the method described herein.

[0043] According to the present invention, it is also possible to use the polymer PM3 described herein and / or the polymer PM3 obtained or obtainable by the method described herein for the production of a polymer, preferably a polymer product PP1, and / or in a recycling process.

[0044] According to a further aspect, the present invention also relates to polymer products PP1, PP2, PP3 and / or PP4 obtained or obtainable by the process described herein and / or the polymer products PP1, PP2, PP3 and / or PP4 comprising, preferably consisting of, polymer blend PB2 and / or polymers PM1, PM2, PM3 and / or PM4, preferably obtained or obtainable by the process described herein, preferably and one or more additives A1.

[0045] According to the present invention, it is also possible to use the polymer products PP1, PP2, PP3, and / or PP4 described herein in a recycling process, preferably a mechanical recycling process. The inventors have surprisingly found that recycling, especially mechanical recycling, of the polymer products PP1-PP4 is easier than that of the untreated polymer product, especially when the polymer products PP1-PP4 contain the polymer blend PP2. Without wishing to be bound by theory, this is because the polymer products lack short polymer fragments. The same applies to the polymers PM3 and PM4, polyol composition PC1, and polymer blend PB2 described herein.

[0046] The polymer blend PB2 and / or the polymer product PP1 comprise a polymer PM1, preferably a polyamide. The inventors have surprisingly found that the IR spectra of the polymer blend PB2 and / or the polymer products PP1-PP4 can differ from the IR spectra of a freshly produced polymer, preferably a polyamide, and / or a freshly produced polymer blend and / or polymer product, preferably comprising a polyamide.

[0047] Thus, preferably, in a preferred embodiment, the polymer blend PB2 and / or the polymer product PP1, PP2, PP3 and / or PP4 comprises the polymer PM1, more preferably a polyamide, the polymer blend PB2 and / or the polymer product PP1, PP2, PP3 and / or PP4 have a peak at 1600 cm in the IR spectrum. -1 More than 1800cm -1 Below 1630cm, preferably -1 Over 1680cm -1 In the following, a peak, preferably a peak indicative of ν(C═O) vibrations, and / or the polymer blend PB2 and / or the polymer products PP1, PP2, PP3 and / or PP4, is shown at 1450 cm in the IR spectrum. -1 More than 1600cm -1 Below 1530cm, preferably -1 Over 1570cm -1 In the following, peaks, preferably those indicative of ν(CH) and / or δ(CNH) vibrations, are shown, and / or the polymer blend PB2 and / or the polymer products PP1, PP2, PP3 and / or PP4 have peaks in the IR spectrum at 2500 cm -1 More than 3500cm -1 Below 2700cm, preferably -1 ~3200cm -1 In particular, the IR spectrum exhibits a peak, preferably a peak indicating ν(CH) vibrations, at 1450 cm -1 More than 1600cm -1 Below 1530cm, preferably -1 ~1570cm -1 Peaks at 0.05°C showing ν(CH) and / or δ(CNH) vibrations indicate that the polymer blend PB2 and polymer product PP1 can be obtained by the methods described herein.

[0048] The weight-average molar mass Mw of the polymer blend PB2 and / or the polymer product PP1 is not particularly limited. Preferably, the weight-average molar mass Mw of the polymer blend PB2 and / or the polymer product PP1 is 1.00 × 10 4 or more, preferably 5.00 x 10 4 More preferably, 5.40 × 10 4 More preferably, 5.80 x 10 4 More preferably, 6.30 x 10 4 More preferably, 6.80 x 10 4 More preferably, 7.10 x 10 4 More preferably, 7.30 × 10 4 or greater, and / or 1.00 x 10 5 Less than or equal to 8.00 x 10 4 or less, more preferably 7.50 × 10 4 or less, more preferably 7.40 × 10 4 or less, more preferably 7.00 × 10 4 or less, more preferably 6.70 × 10 4 or less, more preferably 6.50 × 10 4 or less, more preferably 6.30 × 10 4 or less, more preferably 6.10 × 10 4 or less, more preferably 5.85 × 10 4 or less, more preferably 5.70 × 10 4 or less, more preferably 5.50 × 10 4 or less, more preferably 5.30 × 10 4 or less, more preferably 5.10 × 10 4 In particular, when the mass-average molar mass Mw is high, that is, 1.00 × 10 4 or more, preferably 5.00 x 10 4 More preferably, 5.40 × 10 4 More preferably, 5.80 x 10 4 More preferably, 6.30 x 10 4 More preferably, 6.80 x 10 4 More preferably, 7.10 x 10 4More preferably, 7.30 × 10 4 A value of 1.00×10 or more improves the skin sensitivity of polymer blend PB2 and / or polymer product PP1. Without wishing to be bound by theory, a high value of the weight-average molar mass Mw indicates a low content of very short polymers and / or oligomers. These short polymers and / or oligomers can diffuse out of polymer blend PB1 and / or polymer blend PB2 and / or polymer product PP1 and cause skin irritation. The inventors have surprisingly found that high values ​​can be obtained, especially when caprolactam, preferably caprolactam, and solvent S02, preferably alcohol (methanol) and / or water, more preferably water, are present in solvent S1. Furthermore, a low weight-average molar mass Mw improves the processing of polymer blend PB2 and / or polymer product PP1. Therefore, preferably, the weight-average molar mass Mw of polymer blend PB2 and / or polymer product PP1 is 1.00×10 or less. 5 Less than or equal to 8.00 x 10 4 or less, more preferably 7.50 × 10 4 or less, more preferably 7.40 × 10 4 or less, more preferably 7.00 × 10 4 or less, more preferably 6.70 × 10 4 or less, more preferably 6.50 × 10 4 or less, more preferably 6.30 × 10 4 or less, more preferably 6.10 × 10 4 or less, more preferably 5.85 × 10 4 or less, more preferably 5.70 × 10 4 or less, more preferably 5.50 × 10 4 or less, more preferably 5.30 × 10 4 or less, more preferably 5.10 × 10 4 The following is the result.

[0049] The number average molar mass Mn of the polymer blend PB2 and / or the polymer product PP1 is not particularly limited. Preferably, the number average molar mass Mn of the polymer blend PB2 and / or the polymer product PP1 is 2.00 × 10 4 or more, preferably 2.10 x 10 4 More preferably, 2.20 × 10 4 More preferably, 2.30 × 10 4 More preferably, 2.40 × 10 4 More preferably, 2.48 × 10 4 More preferably, 2.50 × 10 4 More preferably, 2.60 × 10 4 More preferably, 2.65 × 10 4 More preferably, 2.70 × 10 4 or more, and / or 4.00 x 10 4 Less than or equal to 3.00 x 10 4 or less, more preferably 2.70 × 10 4 or less, more preferably 2.65 × 10 4 or less, more preferably 2.60 × 10 4 or less, more preferably 2.55 × 10 4 or less, more preferably 2.50 × 10 4 or less, more preferably 2.46 × 10 4 In particular, when the number average molar mass Mn is high, that is, 2.00 × 10 4 or more, preferably 2.10 x 10 4 More preferably, 2.20 × 10 4 More preferably, 2.30 × 10 4 More preferably, 2.40 × 10 4 More preferably, 2.48 × 10 4 More preferably, 2.50 × 10 4 More preferably, 2.60 × 10 4 More preferably, 2.65 × 10 4 More preferably, 2.70 × 10 4A value of 4.00×10 or more can improve the skin sensitivity of polymer blend PB2 and / or polymer product PP1. Without wishing to be bound by theory, a high value of number-average molar mass Mn indicates a low content of very short polymers and / or oligomers. These short polymers and / or oligomers can diffuse from polymer blend PB1 and / or polymer blend PB2 and / or polymer product PP1 and cause skin irritation. The inventors have surprisingly found that high values ​​can be obtained, particularly when caprolactam, preferably caprolactam, and solvent S02, preferably alcohol (methanol) and / or water, more preferably water, are present in solvent S1. Furthermore, a low number-average molar mass Mn improves the processing of polymer blend PB2 and / or polymer product PP1. Therefore, preferably, the number-average molar mass Mn of polymer blend PB2 and / or polymer product PP1 is 4.00×10 or less. 4 Less than or equal to 3.00 x 10 4 or less, more preferably 2.70 × 10 4 or less, more preferably 2.65 × 10 4 or less, more preferably 2.60 × 10 4 or less, more preferably 2.55 × 10 4 or less, more preferably 2.50 × 10 4 or less, more preferably 2.46 × 10 4 The following is the result.

[0050] In a preferred embodiment, where preferably polymer PM1 is a polyamide and / or where preferably polymer blend PB1 and / or polymer blend PB2 comprise an additive, preferably a colorant, the content of amino end groups in polymer blend PB2 and / or polymer product PP1 is 1 mmol / kg or more, preferably 2 mmol / kg or more, further preferably 3 mmol / kg or more, further preferably 4 mmol / kg or more, further preferably 5 mmol / kg or more, further preferably 6 mmol / kg or more, further preferably 7.0 mmol / kg or more, further preferably 7.2 mmol / kg or more, further preferably 7.4 mmol / kg or more, further preferably 7.6 mmol / kg or more, further preferably 7.8 mmol / kg or more, further preferably 8.0 mmol / kg or more, Preferably, the content is 8.2 mmol / kg or more, more preferably 9.0 mmol / kg or more, even more preferably 15 mmol / kg or more and / or 100 mmol / kg or less, preferably 75 mmol / kg or less, more preferably 50 mmol / kg or less, even more preferably 40 mmol / kg or less, even more preferably 30 mmol / kg or less, even more preferably 20 mmol / kg or less, even more preferably 10 mmol / kg or less, even more preferably 9.0 mmol / kg or less, even more preferably 8.5 mmol / kg or less, even more preferably 8.2 mmol / kg or less, even more preferably 8.0 mmol / kg or less, even more preferably 7.5 mmol / kg or less, even more preferably 7.4 mmol / kg or less, even more preferably 7.3 mmol / kg or less, even more preferably 7.2 mmol / kg or less. In particular, a low content of amino terminal groups improves separation.Without wishing to be bound by theory, a low content of amino end groups, i.e., 100 mmol / kg or less, preferably 75 mmol / kg or less, more preferably 50 mmol / kg or less, more preferably 40 mmol / kg or less, more preferably 30 mmol / kg or less, more preferably 20 mmol / kg or less, more preferably 10 mmol / kg or less, more preferably 9.0 mmol / kg or less, more preferably 8.5 mmol / kg or less, more preferably 8.2 mmol / kg or less, more preferably 8.0 mmol / kg or less, more preferably 7.5 mmol / kg or less, more preferably 7.4 mmol / kg or less, more preferably 7.3 mmol / kg or less, more preferably 7.2 mmol / kg or less, indicates that the colorant is still intact and still connected, e.g., bound, to the amino end groups of the polymer and that less colorant is present in solvent S2. Furthermore, a high content of amino end groups, i.e., 1 mmol / kg or more, preferably 2 mmol / kg or more, more preferably 3 mmol / kg or more, more preferably 4 mmol / kg or more, more preferably 5 mmol / kg or more, more preferably 6 mmol / kg or more, more preferably 7.0 mmol / kg or more, more preferably 7.2 mmol / kg or more, more preferably 7.4 mmol / kg or more, more preferably 7.6 mmol / kg or more, more preferably 7.8 mmol / kg or more, more preferably 8.0 mmol / kg or more, more preferably 8.2 mmol / kg or more, more preferably 9.0 mmol / kg or more, more preferably 15 mmol / kg or more, improves the processability of polymer blend PB2, especially when the polymer blend is further converted into polymer product PP1, especially when polymer product PP1 is a fiber or fabric.

[0051] In a preferred embodiment, where preferably polymer PM1 is a polyamide and / or where preferably polymer blend PB1 and / or polymer blend PB2 comprise an additive, preferably a colorant, the content of carboxyl end groups in polymer blend PB2 and / or polymer product PP1 is 1 mmol / kg or more, preferably 25 mmol / kg or more, further preferably 50 mmol / kg or more, further preferably 60 mmol / kg or more, further preferably 65 mmol / kg or more, further preferably 66 mmol / kg or more, further preferably 70 mmol / kg or more, further preferably 73.0 mmol / kg or more, further preferably 73.2 mmol / kg or more, further preferably 73.3 mmol / kg or more, further preferably 73.4 mmol / kg or more, further preferably 73.6 mmol / kg or more, further preferably 73.8 mmol / kg or more. ol / kg or more, more preferably 74.0 mmol / kg or more, and / or 100 mmol / kg or less, preferably 90 mmol / kg or less, even more preferably 80 mmol / kg or less, even more preferably 75 mmol / kg or less, even more preferably 74.9 mmol / kg or less, even more preferably 74.8 mmol / kg or less, even more preferably 74.7 mmol / kg or less, even more preferably 74.6 mmol / kg or less, even more preferably 74.5 mmol / kg or less, even more preferably 74.4 mmol / kg or less, even more preferably 74.3 mmol / kg or less, even more preferably 74.2 mmol / kg or less, even more preferably 74.1 mmol / kg or less, even more preferably 74.0 mmol / kg or less, even more preferably 70 mmol / kg or less, even more preferably 50 mmol / kg or less, even more preferably 25 mmol / kg or less.In particular, when the content of carboxyl end groups in polymer blend PB2 and / or polymer product PP1 is 1 mmol / kg or more, preferably 25 mmol / kg or more, more preferably 50 mmol / kg or more, more preferably 60 mmol / kg or more, even more preferably 65 mmol / kg or more, even more preferably 66 mmol / kg or more, even more preferably 70 mmol / kg or more, even more preferably 73.0 mmol / kg or more, even more preferably 73.2 mmol / kg or more, even more preferably 73.3 mmol / kg or more, even more preferably 73.4 mmol / kg or more, even more preferably 73.6 mmol / kg or more, even more preferably 73.8 mmol / kg or more, even more preferably 74.0 mmol / kg or more, the possibility of post-modification of the polymer, for example, dyeability, is improved.

[0052] In a preferred embodiment, in which preferably the polymer PM1 is a polyamide and / or preferably the polymer blend PB1 and / or the polymer blend PB2 comprise an additive, preferably a colorant, the ratio of the content of carboxyl end groups [mmol / kg] to the content of amino end groups [mmol / kg] of the polymer blend PB2 and / or the polymer product PP1 is at least 0.1, preferably at least 1, further preferably at least 2, further preferably at least 3, further preferably at least 4, further preferably at least 5, further preferably at least 6, further preferably at least 7, further preferably at least 8.0, further preferably at least 8.2, further preferably at least 8.5, further preferably at least 9.0, further preferably at least 9.8, further preferably at least 10.0, and / or at most 100, preferably at most 50, further preferably at most 25, further preferably at most 20, further preferably at most 15, further preferably at most 11, further preferably at most 10.0, further preferably at most 9.8, further preferably at most 9.5, further preferably at most 9.3, further preferably at most 8.1. In particular, a low ratio, i.e., 100 or less, preferably 50 or less, more preferably 25 or less, more preferably 20 or less, more preferably 15 or less, more preferably 11 or less, more preferably 10.0 or less, more preferably 9.8 or less, more preferably 9.5 or less, more preferably 9.3 or less, and more preferably 8.1 or less, improves processability. Low values ​​are particularly obtainable when solvent S01 is caprolactam and solvent S02 is preferably water and / or methanol, preferably water. Additionally, a high ratio, i.e., 0.1 or more, preferably 1 or more, more preferably 2 or more, more preferably 3 or more, more preferably 4 or more, more preferably 5 or more, more preferably 6 or more, more preferably 7 or more, more preferably 8.0 or more, more preferably 8.2 or more, more preferably 8.5 or more, more preferably 9.0 or more, more preferably 9.8 or more, and more preferably 10.0 or more, allows the colorant to remain intact and still be connected, e.g., bonded, to the amino groups of the polymer, and less colorant is present in solvent S2.High values ​​can be obtained in particular if the solvent S1 comprises, preferably consists of, caprolactam as solvent SO1 and water and / or methanol as solvent SO2.

[0053] The content of the extractives in the polymer blend PB2 and / or the polymer product PP1 is not particularly limited. In a preferred embodiment, the content of the extractives in the polymer blend PB1 and / or the polymer blend PB2 and / or the polymer product PP1 is 0% by weight or more, preferably 0.1% by weight or more, more preferably 0.1% by weight or more, more preferably 0.2% by weight or more, more preferably 0.3% by weight or more, more preferably 0.5% by weight or more, more preferably 0.8% by weight or more, more preferably 1.0% by weight or more, more preferably 1.2% by weight or more, more preferably 1.4% by weight or more, more preferably 1.6% by weight or more, more preferably 1.8% by weight or more, more preferably 2.0% by weight or more, more preferably 2.2% by weight or more, and more preferably 2.5% by weight or more. 0.5% by weight or more, more preferably 2.8% by weight or more, even more preferably 3.0% by weight or more, and / or the content of extractables of polymer blend PB1 and / or polymer blend PB2 and / or polymer product PP1 is 5% by weight or less, preferably 4% by weight or less, even more preferably 3.5% by weight or less, even more preferably 3.2% by weight or less, even more preferably 3.0% by weight or less, even more preferably 2.5% by weight or less, even more preferably 2.0% by weight or less, even more preferably 1.8% by weight or less, even more preferably 1.3% by weight or less, even more preferably 1.0% by weight or less, even more preferably 0.8% by weight or less, even more preferably 0.6% by weight or less. Low values, i.e., 5 wt% or less, preferably 4 wt% or less, more preferably 3.5 wt% or less, more preferably 3.2 wt% or less, more preferably 3.0 wt% or less, more preferably 2.5 wt% or less, more preferably 2.0 wt% or less, more preferably 1.8 wt% or less, more preferably 1.3 wt% or less, more preferably 1.0 wt% or less, more preferably 0.8 wt% or less, and even more preferably 0.6 wt% or less, improve the purity of the polymer blend. However, the methods described herein require the use of very high amounts of solvent blend SO1 to achieve very low values. Therefore, if the extractables content is very low, the cost of the solvent may exceed its effectiveness.Therefore, preferably, the extractables content of polymer blend PB2 is 0.1 wt% or more, preferably 0.1 wt% or more, more preferably 0.2 wt% or more, even more preferably 0.3 wt% or more, even more preferably 0.5 wt% or more, even more preferably 0.8 wt% or more, even more preferably 1.0 wt% or more, even more preferably 1.2 wt% or more, even more preferably 1.4 wt% or more, even more preferably 1.6 wt% or more, even more preferably 1.8 wt% or more, even more preferably 2.0 wt% or more, even more preferably 2.2 wt% or more, even more preferably 2.5 wt% or more, even more preferably 2.8 wt% or more, even more preferably 3.0 wt% or more.

[0054] The relative viscosity of polymer blend PB2 and / or polymer product PP1 is not particularly limited. Preferably, the relative viscosity of polymer blend PB1 and / or polymer blend PB2 and / or polymer product PP1 is 2.00 or more, preferably 2.10 or more, more preferably 2.20 or more, more preferably 2.20 or more, more preferably 2.21 or more, more preferably 2.22 or more, more preferably 2.274 or more, more preferably 2.275 or more, more preferably 2.276 or more, more preferably 2.30 or more, more preferably 2.40 or more; and / or the relative viscosity of polymer blend PB1 and / or polymer blend PB2 and / or polymer product PP1 is 4.00 or less, preferably 3.50 or less, more preferably 3.00 or less, more preferably 2.50 or less, more preferably 2.45 or less, more preferably 2.40 or less, more preferably 2.30 or less, more preferably 2.28 or less, more preferably 2.27 or less. In particular, processability is improved when the relative viscosity is low, i.e., 4.00 or less, preferably 3.50 or less, more preferably 3.00 or less, even more preferably 2.50 or less, even more preferably 2.45 or less, even more preferably 2.40 or less, even more preferably 2.30 or less, even more preferably 2.28 or less, even more preferably 2.27 or less.

[0055] The shape of the polymer blend PB1 is not particularly limited. Preferably, the polymer blend PB1 is in the form of a woven fabric, a thread, a monofilament, a foam and / or an injection-molded product, an extruded film, or a mixture thereof, preferably a woven fabric. Separation can be improved by using a filigree shape to increase the contact area of ​​the solvent S1. Therefore, woven fabrics, threads, monofilaments, a foam, and an extruded film, preferably a woven fabric, are particularly preferred. To increase the contact area, the polymer blend PB1 can be crushed and / or ground before contacting with the solvent S1 to obtain the mixture MI1.

[0056] The melting point of the polymer blend PB1 is not particularly limited. Preferably, the polymer blend PB1 and / or the polymer blend PB2 and / or the polymer product PP1 are solid at 25°C, preferably 50°C, more preferably 75°C. This can improve the separation of the mixture MI1.

[0057] The polymer blend PB1 may contain several, for example, three or more or four or more polymers and several additives. Preferably, the polymer blend PB1 and / or the polymer blend PB2 and / or the polymer product PP1 contain, preferably consist of, the polymer PM1 and the polymer PM2 and one or more additives A1. This can reduce the complexity of the separation and improve the purity of the separated polymers PM1 and PM2.

[0058] The content of polymer PM1 in solvent S2, polymer blend PB1, polymer blend PB2, and / or polymer product PP1 is not particularly limited. Preferably, the content of solvent S2, polymer blend PB1, polymer blend PB2, and / or polymer product PP1 is 0.1% by weight or more, preferably 1% by weight or more, more preferably 5% by weight or more, more preferably 10% by weight or more, more preferably 20% by weight or more, more preferably 30% by weight or more, more preferably 40% by weight or more, more preferably 50% by weight or more, more preferably 60% by weight or more, more preferably 70% by weight or more, more preferably 80% by weight or more, more preferably 90% by weight or more, more preferably 91% by weight or more, more preferably 95% by weight or more, and more preferably 96% by weight or more, based on solvent S2, polymer blend PB1, polymer blend PB2, and polymer product PP1, respectively. or less, and / or solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 contain 99.9% by weight or less, preferably 98% by weight or less, more preferably 95% by weight or less, even more preferably 90% by weight or less, even more preferably 80% by weight or less, even more preferably 70% by weight or less, even more preferably 60% by weight or less, even more preferably 50% by weight or less, even more preferably 40% by weight or less, even more preferably 30% by weight or less, even more preferably 20% by weight or less, even more preferably 10% by weight or less, even more preferably 5% by weight or less of polymer PM1, with respect to solvent S2, polymer blend PB1, polymer blend PB2 and polymer product PP1, respectively. In particular, a high content of polymer PM1 in polymer blend PB2 and / or polymer product PP1, for example 40% by weight or more, preferably 50% by weight or more, more preferably 60% by weight or more, even more preferably 70% by weight or more, even more preferably 80% by weight or more, even more preferably 90% by weight or more, even more preferably 91% by weight or more, even more preferably 95% by weight or more, even more preferably 96% by weight or more, improves processability.

[0059] The content of polymer PM2 in solvent S2, polymer blend PB1, polymer blend PB2, and / or polymer product PP1 is not particularly limited. Preferably, solvent S2, polymer blend PB1, polymer blend PB2, and / or polymer product PP1 contain polymer PM2 in an amount of 0.01% by weight or more, preferably 0.1% by weight or more, more preferably 1% by weight or more, more preferably 3% by weight or more, more preferably 5% by weight or more, more preferably 10% by weight or more, more preferably 25% by weight or more, more preferably 40% by weight or more, more preferably 50% by weight or more, more preferably 60% by weight or more, more preferably 70% by weight or more, more preferably 80% by weight or more, more preferably 90% by weight or more, and more preferably 95% by weight or more, based on solvent S2, polymer blend PB1, polymer blend PB2, and polymer product PP1, respectively. PB2 and / or polymer product PP1 comprise 99.9% by weight or less, preferably 98% by weight or less, more preferably 95% by weight or less, even more preferably 90% by weight or less, even more preferably 80% by weight or less, even more preferably 70% by weight or less, even more preferably 60% by weight or less, even more preferably 50% by weight or less, even more preferably 40% by weight or less, even more preferably 30% by weight or less, even more preferably 20% by weight or less, even more preferably 10% by weight or less, even more preferably 5% by weight or less, even more preferably 3% by weight or less, even more preferably 2% by weight or less, even more preferably 1% by weight or less, even more preferably 0.5% by weight or less, even more preferably 0.1% by weight or less of polymer PM2, relative to solvent S2, polymer blend PB1, polymer blend PB2 and polymer product PP1, respectively. A low content of polymer PM2 in polymer blend PB2 and / or polymer product PP1, i.e., 20% by weight or less, preferably 10% by weight or less, more preferably 5% by weight or less, even more preferably 3% by weight or less, even more preferably 2% by weight or less, even more preferably 1% by weight or less, even more preferably 0.5% by weight or less, even more preferably 0.1% by weight or less, improves processability.However, to achieve extremely high purity of polymer blend PB2 and / or polymer product PP1, extremely large amounts of solvent S2 may be required, and therefore the cost and effort may exceed the benefits. Therefore, preferably, the content of polymer PM2 in polymer blend PB2 and / or polymer product PP1 is 0.01 wt% or more, preferably 0.1 wt% or more, more preferably 1 wt% or more, even more preferably 3 wt% or more, even more preferably 5 wt% or more, even more preferably 10 wt% or more, even more preferably 25 wt% or more.

[0060] The contents of polymer PM1 and polymer PM2 in solvent S2, polymer blend PB1, polymer blend PB2, and / or polymer product PP1 are not particularly limited. Preferably, solvent S2, polymer blend PB1, polymer blend PB2, and / or polymer product PP1 contain polymer PM1 and polymer PM2 in an amount of 0.1% by weight or more, preferably 1% by weight or more, more preferably 5% by weight or more, more preferably 10% by weight or more, more preferably 20% by weight or more, more preferably 30% by weight or more, more preferably 40% by weight or more, more preferably 50% by weight or more, more preferably 60% by weight or more, more preferably 70% by weight or more, more preferably 80% by weight or more, more preferably 90% by weight or more, and more preferably 95% by weight or more, based on solvent S2, polymer blend PB1, polymer blend PB2, and polymer product PP1, respectively. and / or solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 comprise, with respect to solvent S2, polymer blend PB1, polymer blend PB2 and polymer product PP1, respectively, 99.9% by weight or less, preferably 98% by weight or less, more preferably 95% by weight or less, even more preferably 90% by weight or less, even more preferably 80% by weight or less, even more preferably 70% by weight or less, even more preferably 60% by weight or less, even more preferably 50% by weight or less, even more preferably 40% by weight or less, even more preferably 30% by weight or less, even more preferably 20% by weight or less, even more preferably 10% by weight or less, even more preferably 5% by weight or less of polymer PM1 and polymer PM2.

[0061] The content of polymer PM1 and / or polymer PM2 in polymer blend PB1 can be controlled by selecting a specific polymer blend or by determining the respective polymers in several polymer blends and then screening these polymer blends to obtain polymer blend PB1 having a specific content of polymer PM1 and / or polymer PM2.

[0062] The polymer PM1 is not particularly limited. Preferably, the polymer PM1 and / or the polymer PM3 can be obtained by polymerizing the solvent SO1 together with the monomers MO1, MO2, MO3 and / or MO4, which increases the tolerance of the trace amount of the solvent SO1 in the polymer blend PB2 and / or the polymer product PP1.

[0063] In a more preferred embodiment, the polymer PM1 and / or the polymer PM3 is preferably PA4, PA5, PA6, PA7, PA8, PA9, PA10, PA11, PA12, PA45, PA4.6, PA5.5, PA5.6, PA6.6, PA6 / 6.6, PA6.9, PA5.10, PA6.10, PA6.12, PA6 / 6.36, PA6.6 / 6.36, PA9.6, PA9.9, PA9.10, PA9.12, PA12.12, PA6.T, PA8.T, PA9.T, PA10.T, PA12.T, PA6.I, PA8.I, PA9.I, PA10.I, PA12.I, PA6.T / 6, PA6.T / 10, PA6.T / 12, PA6.T / 6.I, PA6.T / 8.T, PA6.T / 9.T, PA6.T / 10.T, PA6.T / 12.T, PA12.T / 6.T, PA6.T / 6.I / 6, PA6.T / 6.I / 12, PA6.T / 6.I / 6.10, PA6.T / 6.I / 6.12, PA6.T / 6.6, PA6.T / 6.10, PA6.T / 6.12, PA10.T / 6, PA10.T / 11, PA10.T / 12, PA8.T / 6.T, PA8.T / 66, PA8.T / 8.I, PA8.T / 8.6, PA8.T / 6.I, PA10.T / 6.T, PA10.T / 6.6, PA10.T / 10.I, PA10.T / 10.I / 6.T, PA10.T / 6.I, PA4.T / 4.I / 4.6, PA4.T / 4.I / 6.6, PA5.T / 5.I, PA5.T / 5.I / 5.6, PA5.T / 5.I / 6.6, PA6.T / 6.I / 6.6, PAMXDA.6, PAIPDA.I, PAIPDA.T, PAMACM.I, PAMACM.T, PAPACM.I, PAPACM.T, PAMXDA.I, PAMXDA.T, PA6.T / IPDA.T, PA6.T / MACM.T, PA6.T / PACM.T, PA6.T / MXDA.T, PA6.T / 6.I / 8.T / 8.I, PA6.T / 6.I / 10.T / 10.I, PA6.T / 6.I / IPDA.T / IPDA.I, PA6.T / 6.I / MXDA.T / MXDA.I, PA6.T / 6.I / MACM.T / MACM.I, PA6.T / 6.I / PACM.T / PACM.I, PA6.T / 10.T / IPDA.T, PA6.T / 12.T / IPDA.T, PA6.T / 10.T / PACM.T, PA6.T / 12.T / PACM.Polyamides selected from PA10.T, PA10.T / IPDA.T, and PA12.T / IPDA.T, as well as copolymers and blends thereof, preferably PA6 and PA6.6, as well as copolymers and blends thereof. More preferably, polymer PM1 and / or polymer PM3 are PA6 and / or PA6.6, and even more preferably, polymer PM1 and / or polymer PM3 are PA6. It is particularly preferred that polymer PM1 is PA6 and solvent SO1 is caprolactam. This can increase the purity of polymer blend PB2 and / or polymer product PP1.

[0064] In a further preferred embodiment, the polymer PM1 is not a polyurea, preferably not a polyurethane or a polyurea. In particular, the polymer PM1 is a polyamide as described herein, preferably PA6, the polymer PM2 is a polyurethane and / or polyurea, preferably a polyurea as described herein, and the solvent SO1 is a lactam, preferably a caprolactam as described herein. This allows for an increase in the purity of the polymer blend PB2 and / or the polymer product PP1.

[0065] In a further preferred embodiment, the polymer PM1 and / or the polymer PM3 is polyethylene terephthalate (PET) and / or a polyester and / or a cellulosic polymer.

[0066] According to the present invention, the solubility (g / L) of polymer PM1 in solvent S1 is lower than the solubility (g / L) of polymer PM2 in solvent S1. Preferably, the solubility of polymer PM1 in solvent S1 is 4 g / L or less, preferably 3 g / L or less, more preferably 2 g / L or less, even more preferably 1 g / L or less, and even more preferably 0.1 g / L or less. This improves separation and the purity of solvent S2.

[0067] Polymers PM2, PM3, and PM4 are not particularly limited. Preferably, polymer PM2 and / or polymer PM3 and / or polymer PM4 are polyurethanes and / or polyureas, preferably thermosetting and / or thermoplastic polyurethanes or polyureas or mixtures thereof, more preferably thermoplastic polyurethanes or polyureas or mixtures thereof, and even more preferably thermoplastic polyurethanes based on aromatic isocyanates and / or thermoplastic polyurethanes based on aliphatic isocyanates. In particular, polymer PM1 is a polyamide as described herein, preferably PA6; polymer PM2 is a polyurethane and / or polyurea, preferably a polyurethane and / or polyurea as described herein, even more preferably a polyurea as described herein; solvent SO1 is a lactam as described herein, preferably caprolactam; and solvent SO2 is preferably an alcohol and / or water, preferably water. Thus, the separation is highly effective, and the resulting polymer blend PB1 and solvent S2 exhibit improved purity.

[0068] The method for obtaining the polyurethanes described herein is not particularly limited. Preferably, polymer PM2 and / or polymer PM3 and / or polymer PM4 are polyurethanes obtainable by composition A and composition B, wherein composition A contains a compound containing at least two, preferably two or three, isocyanate groups, preferably a compound selected from aliphatic, alicyclic and aromatic compounds containing at least two, preferably two or three, isocyanate groups, more preferably a compound selected from 2,2'-, 2,4'- and 4,4'-methylenediphenyl and 2,6-toluene diisocyanate (TDI), tetramethylene diisocyanate, hexamethylene diisocyanate (HDI), naphthylene diisocyanate (NDI), and oligomers and mixtures thereof; and component B comprises a compound containing at least two alcohol groups, preferably compound B is selected from aliphatic, alicyclic, and aromatic compounds containing at least two alcohol groups. , more preferably, composition B comprises a compound selected from polyols, polyether polyols, polyester polyols and mixtures thereof, more preferably composition B comprises a compound having a molecular weight of 400 g / mol to 15,000 g / mol, selected from polyols, polyether polyols, polyester polyols and mixtures thereof, and / or composition B comprises a compound comprising at least two functional groups reactive towards isocyanate groups, preferably at least two functional groups selected from alcohols, amines and mixtures thereof, and / or composition B optionally comprises an epoxide compound, preferably water copolymerized with ethylene oxide and / or propylene oxide, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, neopentyl glycol, 1,6-hexanediol, 1,4-cyclohexanedimethanol, hydroquinone bis(2-hydroxyethyl) ether, ethanolamine, diethanolamine, methyldiethanolamine, phenyldiethanolamine, glycerol, trimethylolpropane, 1,2,6-hexanetriol, triethanolamine, pentaerythritol, N,N,N',N'-tetrakis(2-hydroxypropyl)ethylenediamine, diethyltoluenediamine, dimethylthiotoluenediamine, and mixtures thereof.

[0069] According to the present invention, the solubility (g / L) of polymer PM1 in solvent S1 is lower than the solubility (g / L) of polymer PM2 in solvent S1. Preferably, the solubility of polymer PM2 and / or polymer PM4 in solvent S1 is 3 g / L or more, preferably 4 g / L or more, more preferably 5 g / L or more, more preferably 10 g / L or more, more preferably 15 g / L or more, more preferably 25 g / L or more, more preferably 50 g / L or more, more preferably 100 g / L or more, and more preferably 200 g / L or more. The higher the solubility of polymer PM2 in solvent S1, the less solvent is required. Additionally, the present inventors have surprisingly found that separation is highly effective when the solubility is 3 g / L or greater, preferably 4 g / L or greater, more preferably 5 g / L or greater, more preferably 10 g / L or greater, more preferably 15 g / L or greater, more preferably 25 g / L or greater, more preferably 50 g / L or greater, more preferably 100 g / L or greater, and more preferably 200 g / L or greater.

[0070] In a preferred embodiment, polymer PM2 and / or polymer PM4 are not polyamides. In a preferred embodiment, polymer PM2 and polymer PM3 are the same, and / or polymer PM2 and polymer PM4 are the same, and / or polymer PM3 and polymer PM4 are the same, and more preferably polymer PM2, polymer PM3 and polymer PM4 are the same.

[0071] The polymer PM3 is not particularly limited, and since the polymer PM3 can be obtained by the method described herein, any polymer can be obtained. Preferably, the polymer PM3 is a polymer chosen from polyamide (PA), polyurethane (PU), low-density polyethylene (LDPE), high-density polyethylene (HDPE), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polytetrafluoroethylene (Teflon), thermoplastic polyurethane (TPU), poly(methyl acrylate) (PMA), poly(methyl methacrylate) (PMMA), polybutadiene (BR, PBD), poly(cis-1,4-isoprene), poly(trans-1,4-isoprene), polyoxymethylene (POM), polyethylene terephthalate (PET), polyhydroxyalkanoates (PHA), poly-3-hydroxybutyrate (P3HB), poly-4-hydroxybutyrate (P4HB), polyhydroxyvalerate (PHV), polyhydroxyhexanoate (PHH), polyhydroxyoctanoate (PHO), and copolymers and mixtures thereof. In a preferred embodiment, polymer PM1 and polymer PM3 are the same.

[0072] In a preferred embodiment, polymer blend PB1, preferably polymer blend PB1 and / or polymer blend PB2, more preferably polymer blend PB1 and / or polymer blend PB2 and / or solvent blend SO2, comprises one or more additives A1. As used herein, the additive may be other than a polymer. Preferably, additive A1 is selected from fibers, antioxidants, stabilizers, lubricants, minerals, colorants, pigments, soot, talc, and mixtures thereof. In a preferred embodiment, additive A1 complies with at least one of the Gulf Cooperation Council Standardization Organization GSO 2231 / 2012, GSO 839 / 1997, and / or GSO 1863 / 2013 standards, or is Halal-certified, Kosher-certified, and / or HACCP-certified. In particular, when polymer blend PB1 comprises additives, preferably colorants, the inventors have surprisingly also recognized that the additives, preferably colorants, can be at least partially removed from polymer blend PB1 using the methods described herein.

[0073] According to the present invention, solvent S1 includes solvent SO1. Preferably, solvent S1 includes solvent SO2, but solvent SO1 and solvent SO2 are not the same. The presence of solvent SO2 affects the properties of solvent S1 and thus the separation of polymer blend PB1, particularly depending on the content of solvent SO2 and / or the type of solvent SO2. Generally, the presence of solvent SO2 lowers the melting point of solvent S1.

[0074] In a preferred embodiment, the solvent S1 does not contain dimethylformamide (DMF), preferably dimethylformamide (DMF), dimethylacetamide (DMAc), and / or N-methyl-2-pyrrolidone (NMP). These solvents have very high boiling points. This improves the separation of the solvent S2 to obtain the polymer PM2.

[0075] The content of solvent SO1 and solvent SO2 (if present) in solvent S1 is not particularly limited. In a preferred embodiment, the content of solvent SO1 and / or preferably solvent SO2 in solvent S1 is 20% by weight or more, preferably 30% by weight or more, more preferably 50% by weight or more, more preferably 75% by weight or more, more preferably 80% by weight or more, more preferably 85% by weight or more, more preferably 90% by weight or more, more preferably 95% by weight or more, more preferably 98% by weight or more, and more preferably, the solvent blend consists of solvent SO1 and solvent SO2, preferably solvent SO1. This simplifies the separation of solvent S2, and as a result, the purity of polymer PM2 obtained after separation of solvent S2 is increased.

[0076] The miscibility of the solvents in the solvent blend is not particularly limited. The solvent blend can be an emulsion or a homogeneous mixture at the temperature used in the method described herein. Preferably, solvent S01 and solvent S02 are miscible, preferably at 25°C and / or at the temperature used in the contacting step, and / or solvent S1 is a homogeneous solvent blend, preferably at 25°C and / or at the temperature used in the contacting step. This improves separation.

[0077] The content of solvent SO1 in solvent S1 is not particularly limited. Preferably, in the following formula:

number

number

[0078] The content of solvent SO2 in solvent S1 is not particularly limited. Preferably, in the following formula:

number

number

[0079] At higher contents of solvent SO2, i.e., when y1 is 0.01, preferably 0.05, more preferably 0.07, more preferably 0.10, more preferably 0.15, more preferably 0.2, more preferably 0.3, more preferably 0.4, more preferably 0.5, more preferably 0.6, more preferably 0.7, more preferably 0.8, more preferably 0.9, even more preferably 0.95, more preferably 0.97, the efficiency of the separation is improved, for example, due to a decrease in the boiling point of solvent S1. This is particularly true when solvent SO1 is caprolactam, solvent SO2 is an alcohol, preferably methanol and / or water, and polymer PM2 is a polyurethane and / or polyurea, preferably a polyurethane and / or polyurea as described herein, more preferably a polyurea as described herein. However, a lower content of solvent SO2, i.e., y2 is 0.5, preferably 0.4, more preferably 0.3, more preferably 0.2, more preferably 0.1, more preferably 0.05, increases the solubility of polymer PM2 in solvent S1, and therefore increases the separation.

[0080] In a preferred embodiment, the ratio of solvent SO1 to solvent SO2 [weight / weight] is 0.01 to 100, preferably 0.03 to 30, more preferably 0.05 to 5, even more preferably 0.10 to 1, and even more preferably 0.15 to 0.50, thereby improving the efficiency of the separation.

[0081] In a preferred embodiment, solvent SO1 and / or preferably solvent SO2 are protic solvents. This improves the efficiency of the separation. As used herein, a protic solvent is a solvent having a functional group that can dissociate a hydrogen atom into a proton (dissociation). Examples of functional groups include carboxylic acids, amides, amines, and alcohols.

[0082] The melting points of the solvents SO1 and SO2 are not particularly limited. Preferably, the melting point of the solvent SO1 is higher than the melting point of the solvent SO2. This reduces the melting point of the solvent blend SO1 containing the solvent SO1 and the solvent SO2. This is particularly true when the solvent SO1 is caprolactam.

[0083] In a preferred embodiment, in the formula: [MP]A-[MP]B≧z1 [MP]A is the melting point of the solvent SO1 (°C), [MP]B is the melting point of the solvent SO2 (°C), z1 is 5°C, preferably 25°C, more preferably 50°C, more preferably 75°C, more preferably 100°C, more preferably 125°C, more preferably 150°C, and more preferably 160°C.

[0084] In particular, when the temperature of the melting point of the solvent SO2 is significantly lower than the melting point of the solvent SO2, i.e., when z1 is 5°C, preferably 25°C, more preferably 50°C, more preferably 75°C, more preferably 100°C, more preferably 125°C, more preferably 150°C, more preferably 160°C, the separation is highly effective and costs are reduced.

[0085] In a preferred embodiment, the melting point of solvent S1 is 0°C or higher, preferably 25°C or higher, more preferably 50°C or higher, even more preferably 55°C or higher, even more preferably 60°C or higher, even more preferably 65°C or higher, even more preferably 70°C or higher, and / or 250°C or lower, preferably 200°C or lower, even more preferably 150°C or lower, even more preferably 125°C or lower, even more preferably 100°C or lower, even more preferably 90°C or lower, even more preferably 80°C or lower, even more preferably 80°C or lower, even more preferably 70°C or lower, even more preferably 60°C or lower, even more preferably 50°C or lower, even more preferably 30°C or lower, even more preferably 25°C or lower, even more preferably 20°C or lower, even more preferably 15°C or lower. A lower temperature, for example 100°C or less, more preferably 90°C or less, more preferably 80°C or less, more preferably 80°C or less, more preferably 70°C or less, more preferably 60°C or less, more preferably 50°C or less, more preferably 30°C or less, more preferably 25°C or less, more preferably 20°C or less, and more preferably 15°C or less, can reduce the heat input during separation, thereby reducing the cost of separation.

[0086] The type of solvent SO1 is not particularly limited. Preferably, solvent SO1 can be polymerized, preferably together with monomers MO1 and / or MO2 and / or MO3, to obtain polymer PM1. The inventors have surprisingly recognized that, in some cases, at least some trace amounts of solvent SO1 remain in the separated product, for example, in polymer blend PB2 containing polymer PM1. Therefore, when solvent SO1 is a monomer and can be polymerized to obtain polymer PM1, the effect of solvent SO1 on the properties of polymer blend PB2 is reduced.

[0087] In a preferred embodiment, solvent SO1 comprises, preferably consists of, the elements C, O, and H, preferably C, O, N, and H, and / or solvent SO1 is an amide, preferably a lactam, preferably 2-pyrrolidone, 2-piperidone, caprolactam, and / or laurolactam, more preferably caprolactam and / or laurolactam, more preferably caprolactam, even more preferably ε-caprolactam. In particular, the efficiency of the separation is improved when solvent SO1 is a lactam, preferably caprolactam, polymer PM1 is a polyamide as described herein, and polymer PM2 is a polyurethane and / or polyurea, preferably a polyurethane and / or polyurea as described herein, even more preferably a polyurea as described herein.

[0088] The type of solvent SO2 is not particularly limited. Preferably, solvent SO2 contains elements O and H, preferably C, O and H, and / or solvent SO2 contains an -OH group, and is preferably water and / or alcohol, preferably methanol, ethanol, propanol and / or water, more preferably water.

[0089] In another preferred embodiment, the solvent SO2 is selected from water and an octanol-water partition coefficient log K in the range of -1.6 to +1.6. OW and preferably water, C5 to C12 alkanes, aliphatic C1 to C10 alcohols, C3 to C10 ketones, C2 to C10 cyclic ketones, HO-[C1 to C10 alkyl-O-] n-H (n is an integer ranging from 2 to 1000), C1 to C10 alkyl-O-C3 to C10 alkyl ether, C3 to C10 cyclic ether (which may be substituted with one or more C1 to C6 alkyl groups), C6 to C10 aromatic hydrocarbon (which may be substituted with one or more C1 to C6 alkyl groups), C2 to C10 aliphatic ester, C8 to C11 aromatic ester, C5 to C10 cyclic carboxylic acid ester (lactone), C3 to C12 amide, preferably R1R2N-C(=O)-R3 (wherein R1 and R2 are independently C1 to C 4 alkyl group, and R3 is selected from the group consisting of a C1-C9 alkyl group, a C1-C10 ester group, and a C1-C6 ether group), a C3-C6 lactam (optionally substituted with one or more substituents selected from a C1-C6 alkyl group, a C1-C6 ester group, and a C1-C6 ether group), a C5 imidazolidine (optionally substituted with one or more C1-C6 alkyl groups), and a C5-C7 imidazolidone (optionally substituted with one or more C1-C6 alkyl groups).

[0090] The boiling point of solvent SO2 is not particularly limited. Preferably, the boiling point of solvent SO2 is 0°C to 150°C, preferably 10°C to 120°C, more preferably 20°C to 110°C, even more preferably 30°C to 100°C, even more preferably 50°C to 90°C, and even more preferably 60°C to 80°C. A low boiling point, for example, 120°C or less, preferably 110°C or less, more preferably 100°C or less, even more preferably 90°C or less, and even more preferably 80°C or less, makes it easier to remove solvent SO2, for example, by distillation, and therefore makes it easier to recover solvent SO1 and improves the purity of polymer blend PB2.

[0091] Those skilled in the art will understand that all components present in solvent S1 are preferably also present in solvent S2. Thus, preferably, solvent S2 comprises the same solvent as solvent S1, and / or solvent S2 comprises solvent SO1, preferably and solvent SO2. Consequently, preferably, solvent S2 comprises one or more, preferably two solvents selected from the list consisting of a lactam, preferably caprolactam, methanol, ethanol, propanol, isopropanol, acetonitrile, ethyl acetate, acetone and water, preferably a lactam, preferably caprolactam, and water and / or methanol, more preferably a lactam, preferably caprolactam and water.

[0092] In a preferred embodiment, the polymer products PP1, PP2, PP3, and / or PP4 are woven fabrics, yarns, monofilaments, foams, granules, foils, injection-molded articles, and / or extruded films, and mixtures thereof, preferably woven fabrics. In a preferred embodiment, the polymer products PP1, PP2, PP3, and / or PP4 contain at least 1% of polymer PM1 and / or polymer PM3, preferably obtained or obtainable by the methods described herein. In a preferred embodiment, the polymer products PP1, PP2, PP3, and / or PP4 contain polymer PM1, PM2, PM3, and / or PM4. In a preferred embodiment, the polymer blend PB2 and / or the polymer products PP1, PP2, PP3, and / or PP4 are amorphous. In a preferred embodiment, the polymer blend PB2 and / or the polymer products PP1, PP2, PP3, and / or PP4 are semi-crystalline.

[0093] In a preferred embodiment, the recycled content in the polymer products PP1, PP2, PP3 and / or PP4 is 5 wt% or more, preferably 10 wt% or more, even more preferably 20 wt% or more, even more preferably 25 wt% or more, even more preferably 30 wt% or more, even more preferably 35 wt% or more, even more preferably 50 wt% or more, even more preferably 75 wt% or more, even more preferably 80 wt% or more, even more preferably about 100 wt%.

[0094] In a preferred embodiment, the monomers MO1 and / or MO3 are lactams, preferably caprolactams, more preferably ε-caprolactams.

[0095] In a preferred embodiment, the monomer MO1 and / or the monomer MO2 and / or the monomer MO3 and / or the monomer MO4 are selected from the group consisting of polyamide (PA), polyurethane (PU), low density polyethylene (LDPE), high density polyethylene (HDPE), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polytetrafluoroethylene (Teflon), thermoplastic polyurethane (TPU), poly(methyl acrylate) (PMA), poly(methyl methacrylate) (PMMA), polybutadiene (BR, PBD), It is a monomer that can be polymerized, optionally together with further monomers, to obtain a polymer selected from poly(cis-1,4-isoprene), poly(trans-1,4-isoprene), polyoxymethylene (POM), polyethylene terephthalate (PET), polyhydroxyalkanoates (PHAs), poly-3-hydroxybutyrate (P3HB), poly-4-hydroxybutyrate (P4HB), polyhydroxyvalerate (PHV), polyhydroxyhexanoate (PHH), polyhydroxyoctanoate (PHO), and copolymers and mixtures thereof.

[0096] In a preferred embodiment, the polymer blend PB2 and / or the polymer products PP1, PP2, PP3 and / or PP4 exhibit improved processability, and / or the polymer blend PB2 and / or the polymer products PP1, PP2, PP3 and / or PP4 exhibit improved skin sensitivity, and / or the polymer blend PB2 and / or the polymer products PP1, PP2, PP3 and / or PP4 exhibit an improved carbon footprint, thus expanding the range of applications.

[0097] Solvent S1 and / or solvent S2 can be a single solvent or a solvent blend of two or more solvents.

[0098] In a preferred embodiment, solvent S1 is solvent blend SB1.

[0099] In a preferred embodiment, solvent S1 consists of solvent SO1.

[0100] In a preferred embodiment, solvent S1 comprises, preferably consists of, solvent SO1 and solvent SO2.

[0101] In a preferred embodiment, solvent S2 comprises, preferably consists of, solvent SO1, preferably solvent SO1, polymer PM2 and one or more additives, more preferably solvent SO1, solvent SO2, polymer PM2 and one or more additives, more preferably solvent SO1, solvent SO2, polymer PM1, polymer PM2 and one or more additives.

[0102] In a preferred embodiment, solvent S2 is solvent blend SB2.

[0103] In a preferred embodiment, solvent S1 and / or, preferably, solvent S2, does not comprise dimethylformamide DMF, dimethylacetamide DMAc, 1-methylpyrrolidin-2-one NMP, 2-pyrrolidone, 2-piperidone, 2,2'-diaminodiethylamine (DETA), diisopropylamine, pyridine, pentylamine, N,N-diethylethanamine, diethylene glycol, tetrahydrofuran THF, hexamethylphosphoramide HMPA, acetonitrile, dimethyl sulfoxide DMSO, and / or, preferably, 1,4-butanediol.

[0104] In a preferred embodiment, polymer PM2 and / or polymer PM3 and / or polymer PM4 comprise, preferably consist of, polyurethane and / or polyurea, more preferably polyurea, more preferably a copolymer comprising polyurea, more preferably a polyether-polyurea copolymer.

[0105] In a preferred embodiment, the solvent SO1 is a monoalcohol, preferably methanol and / or ethanol, more preferably methanol.

[0106] In a preferred embodiment, the solvent in solvent S1 and the solvent in solvent S2 are the same, and therefore no additional solvent is added or removed during the contacting and separating steps.

[0107] In a preferred embodiment, the polymer product PP1 and / or polymer product PP2 and / or polymer product PP3 and / or polymer product PP4 is in the form of a foil, granules, powder, laminate, foam, molded article or pipe.

[0108] In a preferred embodiment, polymer product PP1 and / or polymer product PP2 and / or polymer product PP3 and / or polymer product PP4 is or is part of: Parts of cars; preferably cylinder head covers, engine covers, housings for charge air coolers, charge air cooler flaps, intake pipes, intake manifolds, connectors, gear wheels, fan wheels, coolant boxes, housings, housing parts for heat exchangers, coolant coolers, charge air coolers, thermostats, water pumps, radiators, fasteners, parts of battery systems for electromobility, dashboards, steering column switches, seats, headrests, centre consoles, transmission parts, door modules, A, B, C or D pillar covers, spoilers, door handles, exterior mirrors, windscreen wipers, windscreen wiper protective housings, decorative grilles, cover strips, roof rails, window frames, sunroof frames, antenna panels, headlights and taillights, engine covers, cylinder head covers, intake manifolds, airbags, cushions or coatings; Clothing materials; preferably shirts, trousers, pullovers, boots, shoes, soles, tights or jackets; Electrical components; preferably electrical or electronic passive or active components, circuit breakers, circuit boards, printed circuit boards, terminal blocks, housing parts, foils, lines, switches, switchgear, plugs, sockets, distributors, relays, resistors, capacitors, inductors, bobbins, lamps, diodes, LEDs, transistors, connectors, regulators, integrated circuits (ICs), processors, controllers, memories, sensors, microswitches, microbuttons, semiconductors, reflector housings for light emitting diodes (LEDs), fasteners for electrical or electronic components, spacers, bolts, strips, slide-in guides, screws, nuts, film hinges, snap hooks (snap-ins) or spring tongues; consumer products, agricultural products or pharmaceuticals; preferably tennis strings, climbing ropes, bristles, brushes, artificial grass, 3D printing filaments, grass cutters, zippers, hook and loop fasteners, papermaking equipment, extrusion coatings, fishing lines, fishing nets, marine lines and ropes, vials, syringes, ampoules, bottles, sliding elements, spindle nuts, chain conveyors, plain bearings, rollers, wheels, gears, rollers, ring gears, screw and spring dampers, hoses, pipelines, cable jacketing, sockets, switches, cable ties, fan wheels, carpets, cosmetic boxes or bottles, mattresses, cushions, insulation, detergents, dish washing tabs or powders, shampoos, body washes, shower gels, soaps, fertilisers, fungicides or insecticides; Packaging for the food industry; preferably single or multi-layer blown films, cast films (single or multi-layer), biaxially oriented films or laminated films; or Part of a structure; preferably a rotor blade, an insulating material, a frame, a housing, a wall, a coating or a separating wall.

[0109] In a preferred embodiment, the content of solvent SO1 in solvent S1 and / or preferably in solvent S2 is 20% by weight or more, preferably 30% by weight or more, further preferably 50% by weight or more, further preferably 75% by weight or more, further preferably 80% by weight or more, further preferably 85% by weight or more, further preferably 90% by weight or more, further preferably 95% by weight or more, further preferably 98% by weight or more, further preferably the solvent blend consists of solvent SO1 and solvent SO2, preferably solvent SO1, and / or The content of solvent SO1 in solvent S1 and / or preferably solvent S2 is 100% by weight or less, preferably 99% by weight or less, more preferably 95% by weight or less, even more preferably 90% by weight or less, even more preferably 85% by weight or less, even more preferably 80% by weight or less, even more preferably 75% by weight or less, even more preferably 70% by weight or less, even more preferably 50% by weight or less.

[0110] In a preferred embodiment, the content of solvent SO2 in solvent S1 and / or preferably in solvent S2 is 1% by weight or more, preferably 2% by weight or more, more preferably 5% by weight or more, even more preferably 8% by weight or more, even more preferably 10% by weight or more, even more preferably 15% by weight or more, even more preferably 20% by weight or more, even more preferably 30% by weight or more, even more preferably 40% by weight or more, even more preferably 50% by weight or more, and / or The content of solvent SO2 in solvent S1 and / or preferably solvent S2 is 100% by weight or less, preferably 50% by weight or less, more preferably 30% by weight or less, even more preferably 25% by weight or less, even more preferably 22% by weight or less, even more preferably 18% by weight or less, even more preferably 15% by weight or less, even more preferably 12% by weight or less, even more preferably 10% by weight or less.

[0111] In a preferred embodiment, in solvent S1 and / or preferably solvent S2, the ratio (weight / weight) of the content of solvent SO2 to the content of solvent SO1 is 0.01 to 0.50, preferably 0.05 to 0.40, more preferably 0.10 to 0.30, and even more preferably 0.15 to 0.25.

[0112] In a preferred embodiment, polymer blend PB1 and / or polymer blend PB2 and / or polymer product comprises, preferably consists of, polymer PM1, polymer PM2 and one or more additives.

[0113] In a preferred embodiment, solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 comprise at least 0.1% by weight, preferably at least 1% by weight, even more preferably at least 5% by weight, even more preferably at least 10% by weight, even more preferably at least 20% by weight, even more preferably at least 30% by weight, even more preferably at least 40% by weight, even more preferably at least 50% by weight, even more preferably at least 60% by weight, even more preferably at least 70% by weight, even more preferably at least 80% by weight, even more preferably at least 90% by weight, even more preferably at least 91% by weight, even more preferably at least 95% by weight, even more preferably at least 96% by weight of polymer PM1 relative to solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1.

[0114] In a preferred embodiment, solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 comprise at most 99.9% by weight, preferably at most 98% by weight, more preferably at most 95% by weight, even more preferably at most 90% by weight, even more preferably at most 80% by weight, even more preferably at most 70% by weight, even more preferably at most 60% by weight, even more preferably at most 50% by weight, even more preferably at most 40% by weight, even more preferably at most 30% by weight, even more preferably at most 20% by weight, even more preferably at most 10% by weight, even more preferably at most 5% by weight, even more preferably at most 2% by weight, even more preferably at most 1% by weight, even more preferably at most 0.5% by weight, even more preferably at most 0.1% by weight, even more preferably at most 0.01% by weight, even more preferably at most 0.001% by weight of polymer PM1 with respect to solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1. In particular, the separation is highly effective when the solvent S2 contains less than 5% by weight, preferably less than 2% by weight, more preferably less than 1% by weight, even more preferably less than 0.5% by weight, even more preferably less than 0.1% by weight, even more preferably less than 0.01% by weight, even more preferably less than 0.001% by weight of polymer PM1 relative to the solvent S2.

[0115] In a preferred embodiment, solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 comprise, relative to solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1, at least 0.1% by weight, preferably at least 1% by weight, even more preferably at least 5% by weight, even more preferably at least 10% by weight, even more preferably at least 20% by weight, even more preferably at least 30% by weight, even more preferably at least 40% by weight, even more preferably at least 50% by weight, even more preferably at least 60% by weight, even more preferably at least 70% by weight, even more preferably at least 80% by weight, even more preferably at least 90% by weight, even more preferably at least 91% by weight, even more preferably at least 95% by weight, even more preferably at least 96% by weight of polymer PM2.

[0116] In a preferred embodiment, solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 comprise at most 99.9% by weight, preferably at most 98% by weight, more preferably at most 95% by weight, even more preferably at most 90% by weight, even more preferably at most 80% by weight, even more preferably at most 70% by weight, even more preferably at most 60% by weight, even more preferably at most 50% by weight, even more preferably at most 40% by weight, even more preferably at most 30% by weight, even more preferably at most 20% by weight, even more preferably at most 10% by weight, even more preferably at most 5% by weight, even more preferably at most 2% by weight, even more preferably at most 1% by weight, even more preferably at most 0.5% by weight, even more preferably at most 0.1% by weight, even more preferably at most 0.01% by weight, even more preferably at most 0.001% by weight of polymer PM2, relative to solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1. In particular, separation is highly effective when the polymer blend PB2 (or polymer product PP1) contains 5% by weight or less of the polymer PM2, preferably 2% by weight or less, more preferably 1% by weight or less, even more preferably 0.5% by weight or less, even more preferably 0.1% by weight or less, even more preferably 0.01% by weight or less, and even more preferably 0.001% by weight or less, based on the polymer blend PB2 (or polymer product PP1). In a further preferred embodiment, the content of the polymer PM2 in the polymer blend PB2 is below the detection limit. This can be achieved by repeating the method described herein several times or by using a significantly larger amount of the solvent S1 described herein. Therefore, in a further preferred embodiment, the polymer blend PB2 is a polymer composition PC1 comprising, preferably consisting of, the polymer PM1 and one or more additives.

[0117] Unless further specified, the following methods are preferably used and definitions apply:

[0118] Tm and / or Tg are preferably obtained by DSC. DSC measurements are carried out in accordance with DIN EN ISO 11357 on a Perkin Elmer DSC 8000 in the temperature range 0-280°C using a heating / cooling rate of 20 K / min.

[0119] IR spectra were obtained using an IR spectrometer equipped with an ATR unit (Thermo Nicolet iS50). For the measurements, the sample was placed directly on the ATR crystal without further preparation and fixed by the stamp of the unit. All measurements consisted of 32 scans and a 4 cm -1 The procedure is carried out at room temperature (25°C) using a resolution of 100 kHz.

[0120] The mass-average molar mass Mw and number-average molar mass are preferably obtained as follows: an Agilent 1100 Series integrated instrument containing 2x PL HFIP gels 300 x 7.5 mm + 1 HFIP-LG Guard 50 x 7.5 mm and a DRI Agilent 1100 detector. All calibrations are performed using PMMA standards with molecular weights between 800 g / mol and 2,200,000 g / mol, purchased from Polymer Standards Service. The flow rate is 1 ml / min. The sample concentration is 1.5 mg / mL. The eluent is HFIP + 0.05% potassium trifluoroacetate.

[0121] The polymer content is preferably obtained as follows: quantitative 1 The content of polymers, e.g., polyamides (PA), in a sample is determined by H-NMR spectroscopy. 1 H was recorded at T = 298.2 K using a Bruker Avance III 400 spectrometer operating at 400.33 MHz. The spectrometer was equipped with a 5 mm z-gradient broadband observation smart probe. Measurements were taken under quantitative conditions using the zg30 pulse program with a sampling of 128 k data points. 1H spectra were recorded using the solvent hexafluoro-2-propanol (HFIP) with a relaxation delay D1 of 45 seconds. Eight transients were summed per spectrum. Processing with Bruker TopSpin 4.1.4 software used 128k data points and applied an exponential window function with a line broadening of 0.3 Hz. Automatic baseline correction with a polynomial of degree 3 was performed, with phase correction and integration performed manually by the user.

[0122] To determine PA from fabrics, samples are prepared by accurately weighing the internal standard 1,2,4,5-tetrachloro-3-nitrobenzene (Tecna) and analyte (Mettler-Toledo XP205DR analytical balance) into suitable vials, followed by dissolution in 2 mL of HFIP.

[0123] Chemical shifts are referenced to hexafluoro-2-propanol-d2 (HFIP, δ(HFIP) = 4.25 ppm). Samples are transferred to 5 mm NMR tubes for measurement. The deuterated solvent HFIP is purchased from Euriso-Top GmbH. Tecna (certified internal standard) is purchased from Sigma-Aldrich. All solvents and internal standards are used as received.

[0124] The content of the test item is calculated using the following formula:

number

[0125] In this equation, w = mass fraction of the analyte in the sample [g / 100g], I k = analyte peak intensity, I St = standard peak intensity, E P =sample mass [g], E St = standard mass [g], A K = protons / molecule of analyte, A St = standard protons / molecule, M K = molecular weight of analyte [g / mol], M St = molecular weight of the standard [g / mol], and R St= standard purity [g / 100g].

[0126] For quantification, triplicate determinations are carried out. In particular, the evaluation of PA is carried out using 1 proton / molecule (approximately 7.6 ppm) of the internal standard Tecna and 2 selected protons / molecule (approximately 2.2 ppm) of the analyte PA.

[0127] The amino and / or carboxylic acid end group content is preferably obtained as follows: to determine the amino end group (AEG) content, a test piece (1 g) is dissolved in 30 mL of a phenol-methanol mixture (75:25 v / v) at 85°C and then titrated potentiometrically against 0.02 mol / l HCl (pH electrode detection).To determine the carboxylic acid end group (CEG), a sample is dissolved in 30 ml of benzyl alcohol and titrated against 0.05 N alcoholic KOH (visual detection).

[0128] The extractables content is determined by methanol extraction according to DIN ISO 6427. The test specimens are extracted in boiling methanol for 16 hours. The extractables dissolved in the methanol are determined gravimetrically.

[0129] The relative viscosity is determined by measuring the viscosity of a 1 g sample in a 100 mL solution at 20 °C in an Ubbe Lohde viscometer according to ISO 307. 96% H2SO4 is used as the solvent. The relative viscosity is the coefficient of the viscosity of the solution to that of sulfuric acid.

[0130] The solubility of a polymer, for example, polymer PM1 or PM2, in a solvent, for example, solvent S1, is preferably determined as follows: First, a supersaturated solution, for example, 5 L, of a polymer, for example, polymer PM1 or PM2, and a solvent, for example, solvent S1, is prepared at ambient conditions (1 bar, 25 ° C.) by stirring an excess of polymer, for example, polymer granules, in the solvent until equilibrium is reached, for example, after 7 days. The supersaturated solution is then separated by filtration to obtain a filter cake and a filtrate. Finally, a specified volume, for example, 1 L, is taken from the filtrate, and the solvent is completely removed from the specified volume by evaporation to obtain a residue. The solubility is the ratio of the residue (g) to the volume (L) taken from the filtrate.

[0131] In this specification, caprolactam is preferably ε-caprolactam. The definitions and preferred embodiments of the methods described herein also apply to the uses, polymers, polymer blends, polyol compositions, and / or polymer products, and vice versa. This includes the fact that any definition and preferred embodiment of polymer product PP1 also applies to polymer products PP2, PP3, and PP4, and vice versa. Those skilled in the art will recognize that any solvent may contain impurities, such as other solvents, salts, or organic compounds. Preferably, the purity of the solvents, particularly solvents SO1 and SO2, is 90% by weight or more, preferably 95% by weight or more, more preferably 98% by weight or more, even more preferably 99% by weight or more, even more preferably 99.9% by weight or more, and even more preferably 99.99% by weight or more. Unless otherwise specified, the recycled content is preferably determined in accordance with DIN EN 15343:2008-02. Unless otherwise specified, the mass of recycled material in the product is preferably determined based on the weight determined by mass balance, preferably based on a free attribution method. Unless otherwise stated, standard ambient temperature and pressure, ie 25° C. and 1 bar, are preferably used or applied.

[0132] Herein, solvent S1 is preferably either solvent SO1 or a solvent blend SB1 comprising, preferably consisting of, solvent SO1 and solvent SO2. Additionally, solvent S2 herein preferably comprises, preferably consists of solvent SO1 or a solvent blend SB1 comprising, preferably consisting of, solvent SO1 and solvent SO2, and polymer PM2, more preferably polymer PM1 and / or one or more additives.

[0133] In summary, the embodiments and preferred embodiments are as follows. The scope of protection is defined by the claims. Combinations of two or more items and / or embodiments, for example, three, four or eight items, are more preferred. The definitions and general statements in this specification also preferably apply to the following items and preferred items. Preferably, the steps described in the following items, especially when present in the claims, are carried out in the order of the following items and / or as shown in the accompanying drawings.

[0134] 1. A method comprising the following steps, preferably in this order: providing a polymer blend PB1 and a solvent S1; Polymer blend PB1 is i) a polymer PM1; ii) polymer PM2; and Including, Solvent S1 is i) a solvent SO1; ii) preferably a solvent, SO2; Including, Preferably, solvent SO1 and solvent SO2 are not the same, the solubility (g / L) of polymer PM1 in solvent S1 is lower than the solubility (g / L) of polymer PM2 in solvent S1; contacting the polymer blend PB1 with a solvent S1 to obtain a mixture MI1; and Preferably, separating the mixture MI1 to obtain a polymer blend PB2 comprising the polymer PM1 and a solvent S2 comprising the polymer PM2.

[0135] 2. In the contacting step, one or more of the following conditions are met: i) polymer blend PB1 and solvent S1 are stirred and / or sonicated at least once, preferably for a time t1; ii) polymer blend PB1 and solvent S1 are in contact for a time t1; iii) the polymer blend PB1 and solvent S1 are heated at least once to a temperature T1, preferably for a time t1; Here, the time t1 is 0.1 seconds or more and 7 days or less, preferably 1 minute or more and 48 hours or less, more preferably 1 hour or more and 32 hours or less, and even more preferably 10 hours or more and 20 hours or less, The temperature T1 of the polymer PM1 measured by DSC is 0°C or higher and lower than Tm, preferably 5°C or higher and 250°C or lower, more preferably 10°C or higher and 200°C or lower, even more preferably 12°C or higher and 85°C or lower, even more preferably 15°C or higher and 75°C or lower, even more preferably 17°C or higher and 65°C or lower, even more preferably 20°C or higher and 60°C or lower, even more preferably 25°C or higher and 55°C or lower, and even more preferably 30°C or higher and 50°C or lower. By any one of the preceding items.

[0136] 3. Separating the mixture MI1 to obtain a polymer blend PB2 containing the polymer PM1 and a solvent S2 containing the polymer PM2. The method according to any one of the preceding items, further comprising:

[0137] 4. Separating the mixture MI1 to obtain a polymer blend PB2 containing the polymer PM1 and a solvent S2 containing the polymer PM2 is preferably a physical separation method in which the mixture MI1 is filtered and / or decanted to obtain a polymer blend PB2 containing the polymer PM1 and a solvent S2 containing the polymer PM2, By any one of the preceding items.

[0138] 5. The ratio [weight / weight] of polymer blend PB1 to solvent S1 during the contacting step is 0.001 or more and 1000 or less, preferably 0.005 or more and 50 or less, more preferably 0.01 or more and 25 or less, more preferably 0.02 or more and 15 or less, more preferably 0.03 or more and 10 or less, more preferably 0.04 or more and 5 or less, more preferably 0.05 or more and 4 or less, more preferably 0.06 or more and 3 or less, more preferably 0.07 or more and 2 or less, more preferably 0.08 or more and 1 or less, more preferably 0.09 or more and 0.5 or less, more preferably 0.10 or more and 0.15 or less, and more preferably about 0.1; By any one of the preceding items.

[0139] 6. Washing the polymer blend PB2 with solvent S1 to obtain a washed polymer blend PB2; and / or Preferably by contact drying, convection drying or radiation drying, and / or further comprising the step of drying the polymer blend PB2. The drying step is carried out under one or more of the following conditions: By one of the above methods: a pressure of 0.01 mbar to 1013 mbar, preferably 0.05 mbar to 500 mbar, more preferably 0.1 mbar to 200 mbar; a temperature of 0°C or higher and lower than Tm of polymer PM1 measured by DSC, preferably 15°C or higher and 250°C or lower, more preferably 20°C or higher and 180°C or lower, even more preferably 40°C or higher and 130°C or lower, and even more preferably 50°C or higher and 100°C or lower; In an atmosphere having at least 90% by volume nitrogen, preferably at least 95% by volume, more preferably at least 98% by volume, and even more preferably about 100% by volume.

[0140] 7. A method according to any one of the preceding items, which is a method for treating polymer blend PB1, and / or a method for recycling polymer blend PB1, and / or a method for producing a monomer, preferably monomer MO1 and / or monomer MO2 and / or monomer MO3, and / or a polymer, preferably polymer PM3 and / or polymer PM4, and / or a polymer product, preferably polymer product PP1 and / or polymer product PP2 and / or polymer product PP3 and / or polymer product PP4, and / or a polyol composition, preferably polyol composition PC1.

[0141] 8. Transformation of solvent S2 to obtain monomers, preferably monomers MO1 and / or monomers MO2, and / or polymers, preferably polymers PM3 and / or polymers PM4, and / or polymer products, preferably polymer product PP1 and / or polymer product PP2 and / or polymer product PP3 and / or polymer product PP4, and / or a polyol composition, preferably polyol composition PC1 The method according to any one of the preceding items, further comprising:

[0142] 9. The method according to any one of the preceding items, wherein the converting step comprises the steps of: adding water to the solvent S2 until the polymer PM2 precipitates, resulting in the polymer PM4.

[0143] 10. The method according to any one of the preceding items, wherein the converting step comprises the steps of: Removing a solvent, preferably solvent SO1, more preferably solvent SO1 and solvent SO2, from solvent S2 to obtain polymer PM4.

[0144] 11. Preferably, the method according to any one of the preceding items, wherein the polymer PM2 and / or the polymer PM4 are polyurethanes and / or polyureas, preferably polyureas, and the converting step comprises the following steps: Depolymerizing the polymer PM4 to obtain a mixture MI2 comprising the monomer MO2, preferably and the polyol composition PC1, preferably by depolymerization by a method selected from hydrolysis, glycolysis, hydrogenation or by aminolysis.

[0145] 12. Preferably, the method according to any one of the preceding items, wherein the polymer PM2 and / or the polymer PM4 are polyurethanes and / or polyureas, preferably polyureas, and the converting step comprises the following steps: screening and / or purifying and / or separating the mixture MI2 obtained by depolymerization of the polymer PM4 to obtain the monomer MO2 and / or the polyol composition PC1;

[0146] 13. The method according to any one of the preceding items, wherein the converting step comprises the steps of: polymerizing a monomer MO2, preferably containing an isocyanate group or an amine derivative thereof, with a molecule containing an OH-group to obtain a polymer PM3, preferably the polymer PM3 being a polyurethane and / or polyurea, preferably a polyurea; and / or Polymerization of the polyol composition PC1, optionally together with further monomers MO4 and / or optionally together with additives A1, with monomers containing groups reactive with OH groups, preferably monomers containing isocyanate groups, to obtain a polymer PM3, preferably a polyurethane and / or polyurea, preferably a polyurea.

[0147] 14. Transformation of the polymer blend PB2 to obtain monomers, preferably monomers MO1 and / or monomers MO3, and / or polymers, preferably polymer PM3, and / or polymer products, preferably polymer product PP1 and / or polymer product PP2 and / or polymer product PP3 and / or polymer product PP4. The method according to any one of the preceding items, further comprising:

[0148] 15. The method according to any one of the preceding items, wherein the converting step comprises the steps of: Biodegrading the polymer blend PB2 and / or the solvent S2 and / or the polymer PM4 to obtain biomass BM1, Optionally, converting the biomass BM1 in monomer precursor MP1, and Transforming biomass BM1 and / or monomer precursor MP1 to obtain monomer MO1.

[0149] 16. The method according to any one of the preceding items, wherein the converting step comprises the steps of: pyrolysis of the polymer blend PB2 and / or the solvent S2 and / or the polymer PM4 to obtain pyrolysis oil and / or pyrolysis gas PY1; steam cracking the pyrolysis oil and / or pyrolysis gas PY1 to obtain a monomer precursor MP1; Transforming the monomer precursor MP1 to obtain the monomer MO1.

[0150] 17. The method according to any one of the preceding items, wherein the converting step comprises the steps of: depolymerizing the polymer blend PB2 to obtain a mixture MI3 comprising at least one monomer MO3; and Preferably, the mixture MI3 is screened and / or purified and / or separated to obtain the monomer MO3.

[0151] 18. The method according to any one of the preceding items, wherein the converting step comprises the steps of: Polymerizing the mixture MI2 and / or the mixture MI3 and / or the monomers MO1 and / or the monomers MO2 and / or the monomers MO3, optionally together with a further monomer MO4 and / or optionally together with an additive A1, to obtain a polymer PM3.

[0152] 19. The method according to any one of the preceding items, wherein the converting step comprises the steps of: forming polymer PM3 and / or polymer PM4 and / or polymer blend PB2, preferably together with further polymers and / or additives, to obtain a polymer product, preferably polymer product PP1 and / or polymer product PP2 and / or polymer product PP3 and / or polymer product PP4.

[0153] 20. A process in which the previous process is repeated one or more times The method according to any one of the preceding items, further comprising:

[0154] 21. Repeating the method according to any one of the preceding items one or more times to obtain a polymer product PP2, preferably wherein the content of the polymer product PP1 in the polymer product PP2 is the content CO1; a step of recycling the polymer product PP1 one or more times to obtain a polymer product PP3, wherein the content of the polymer product PP1 in the polymer product PP3 is preferably the content CO1; recycling the polymer product PP1 one or more times to obtain a recycled material RM1, and converting or forming the recycled material RM1 to obtain a polymer product PP4 comprising the recycled material RM1, preferably wherein the content of the polymer product PP1 and / or the recycled material RM1 in the polymer product PP4 is the content CO1; The content CO1 is 1% by weight or more, preferably 2% by weight or more, more preferably 5% by weight or more, more preferably 15% by weight or more, more preferably 30% by weight or more, more preferably 40% by weight or more, more preferably 60% by weight or more, more preferably 80% by weight or more, more preferably 90% by weight or more, more preferably 95% by weight or more, and / or preferably and Preferably, the content CO1 is 100% by weight or less, preferably 95% by weight or less, more preferably 90% by weight or less, even more preferably 50% by weight or less, even more preferably 25% by weight or less, even more preferably 10% by weight or less, Preferably, the polymer product PP1 and the polymer products PP2, PP3 and / or PP4 are the same; By any one of the preceding items.

[0155] 22. Certifying polymers PM1, PM2, PM3 and / or PM4 and / or polymer blends PB2 and / or polymer products PP1, PP2, PP3 and / or PP4 as circular in accordance with standards or protocols, preferably based on integrity integrity and / or segregation and / or mass balance and / or book and claim chain models of management, preferably based on mass balance, preferably the International Sustainability Carbon Certification (ISCC) standard. The method according to any one of the preceding items, further comprising:

[0156] 23. Polymer PM4 obtained or obtainable by a method according to any one of the preceding items.

[0157] 24. Use of a polymer PM4 according to any one of the preceding items and / or a polymer PM4 obtained or obtainable by a method according to any one of the preceding items for the production of a polymer, preferably a polymer product PP1, and / or in a recycling process.

[0158] 25. A polyol composition PC1 obtained or obtainable by a process according to any one of the preceding items.

[0159] 26. Use of a polyol composition PC1 according to any one of the preceding items and / or a polyol composition PC1 obtained or obtainable by a method according to any one of the preceding items for the production of a polymer, preferably a polymer product PP1, and / or in a recycling process.

[0160] 27. A polymer blend PB2 obtained or obtainable by a method according to any one of the preceding items, preferably comprising polymer PM1.

[0161] 28. Use of a polymer blend PB2 according to any one of the preceding items and / or a polymer blend PB2 obtained or obtainable by a method according to any one of the preceding items for the production of a polymer, preferably a polymer product PP1, and / or in a recycling process.

[0162] 29. Polymer PM3 obtained or obtainable by a method according to any one of the preceding items.

[0163] 30. Use of a polymer PM3 according to any one of the preceding items and / or a polymer PM3 obtained or obtainable by a method according to any one of the preceding items for the production of a polymer, preferably a polymer product PP1, and / or in a recycling process.

[0164] 31. Polymer products PP1, PP2, PP3 and / or PP4 obtained or obtainable by a method according to any one of the preceding items.

[0165] 32. A polymer product PP1, PP2, PP3 and / or PP4 comprising, preferably consisting of, a polymer blend PB2 and / or polymer PM1, PM2, PM3 and / or PM4, preferably as well as one or more additives A1, preferably obtained or obtainable by a method according to any one of the preceding items.

[0166] 33. Use of polymer products PP1, PP2, PP3 and / or PP4, preferably according to any one of the preceding items, in a recycling process, preferably a mechanical recycling process.

[0167] 34. Preferably, the polymer blend PB2 and / or the polymer products PP1, PP2, PP3 and / or PP4 comprise a polymer PM1, more preferably a polyamide; Polymer blend PB2 and / or polymer products PP1, PP2, PP3 and / or PP4 exhibit a peak at 1600 cm in the IR spectrum. -1 More than 1800cm -1 Below 1630cm, preferably -1 Over 1680cm -1 In the following, peaks, preferably those exhibiting ν(C═O) vibrations, are indicated, and / or Polymer blend PB2 and / or polymer products PP1, PP2, PP3 and / or PP4 exhibit a peak at 1450 cm in the IR spectrum. -1 More than 1600cm -1 Below 1530cm, preferably -1 Over 1570cm -1 In the following, peaks, preferably those exhibiting ν(CH) and / or δ(CNH) vibrations, are indicated, and / or The polymer blend PB2 and / or the polymer products PP1, PP2, PP3 and / or PP4 exhibit a peak at 2500 cm in the IR spectrum. -1 More than 3500cm -1 Below 2700cm, preferably -1 ~3200cm -1 and exhibiting a peak, preferably a peak indicative of ν(CH) vibration.

[0168] 35. The weight-average molar mass Mw of the polymer blend PB2 and / or the polymer product PP1 is 1.00 × 104 or more, preferably 5.00 x 10 4 More preferably, 5.40 × 10 4 More preferably, 5.80 x 10 4 More preferably, 6.30 x 10 4 More preferably, 6.80 x 10 4 More preferably, 7.10 x 10 4 More preferably, 7.30 × 10 4 The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items.

[0169] 36. The mass-average molar mass Mw of the polymer blend PB2 and / or the polymer product PP1 is 1.00 × 10 5 Less than or equal to 8.00 x 10 4 or less, more preferably 7.50 × 10 4 or less, more preferably 7.40 × 10 4 or less, more preferably 7.00 × 10 4 or less, more preferably 6.70 × 10 4 or less, more preferably 6.50 × 10 4 or less, more preferably 6.30 × 10 4 or less, more preferably 6.10 × 10 4 or less, more preferably 5.85 × 10 4 or less, more preferably 5.70 × 10 4 or less, more preferably 5.50 × 10 4 or less, more preferably 5.30 × 10 4 or less, more preferably 5.10 × 10 4 10. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein:

[0170] 37. The number average molar mass Mn of the polymer blend PB2 and / or the polymer product PP1 is 2.00 × 10 4 or more, preferably 2.10 x 10 4More preferably, 2.20 × 10 4 More preferably, 2.30 × 10 4 More preferably, 2.40 × 10 4 More preferably, 2.48 × 10 4 More preferably, 2.50 × 10 4 More preferably, 2.60 × 10 4 More preferably, 2.65 × 10 4 More preferably, 2.70 × 10 4 The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items.

[0171] 38. The number average molar mass Mn of the polymer blend PB2 and / or the polymer product PP1 is 4.00 × 10 4 Less than or equal to 3.00 x 10 4 or less, more preferably 2.70 × 10 4 or less, more preferably 2.65 × 10 4 or less, more preferably 2.60 × 10 4 or less, more preferably 2.55 × 10 4 or less, more preferably 2.50 × 10 4 or less, more preferably 2.46 × 10 4 10. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein:

[0172] 39. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein preferably polymer PM1 is a polyamide and / or preferably polymer blend PB1 and / or polymer blend PB2 comprise an additive, preferably a colorant, and wherein the content of amino end groups in polymer blend PB2 and / or polymer product PP1 is 1 mmol / kg or more, preferably 2 mmol / kg or more, more preferably 3 mmol / kg or more, even more preferably 4 mmol / kg or more, even more preferably 5 mmol / kg or more, even more preferably 6 mmol / kg or more, even more preferably 7.0 mmol / kg or more, even more preferably 7.2 mmol / kg or more, even more preferably 7.4 mmol / kg or more, even more preferably 7.6 mmol / kg or more, even more preferably 7.8 mmol / kg or more, even more preferably 8.0 mmol / kg or more, even more preferably 8.2 mmol / kg or more, even more preferably 9.0 mmol / kg or more, even more preferably 15 mmol / kg or more.

[0173] 40. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein preferably polymer PM1 is a polyamide and / or preferably polymer blend PB1 and / or polymer blend PB2 comprise an additive, preferably a colorant, and wherein the content of amino end groups in polymer blend PB2 and / or polymer product PP1 is 100 mmol / kg or less, preferably 75 mmol / kg or less, further preferably 50 mmol / kg or less, further preferably 40 mmol / kg or less, further preferably 30 mmol / kg or less, further preferably 20 mmol / kg or less, further preferably 10 mmol / kg or less, further preferably 9.0 mmol / kg or less, further preferably 8.5 mmol / kg or less, further preferably 8.2 mmol / kg or less, further preferably 8.0 mmol / kg or less, further preferably 7.5 mmol / kg or less, further preferably 7.4 mmol / kg or less, further preferably 7.3 mmol / kg or less, further preferably 7.2 mmol / kg or less.

[0174] 41. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein preferably polymer PM1 is a polyamide and / or preferably polymer blend PB1 and / or polymer blend PB2 comprise an additive, preferably a colorant, and wherein the content of carboxyl end groups in polymer blend PB2 and / or polymer product PP1 is 1 mmol / kg or more, preferably 25 mmol / kg or more, further preferably 50 mmol / kg or more, further preferably 60 mmol / kg or more, further preferably 65 mmol / kg or more, further preferably 66 mmol / kg or more, further preferably 70 mmol / kg or more, further preferably 73.0 mmol / kg or more, further preferably 73.2 mmol / kg or more, further preferably 73.3 mmol / kg or more, further preferably 73.4 mmol / kg or more, further preferably 73.6 mmol / kg or more, further preferably 73.8 mmol / kg or more, further preferably 74.0 mmol / kg or more.

[0175] 42. Preferably, polymer PM1 is a polyamide and / or preferably polymer blend PB1 and / or polymer blend PB2 comprise an additive, preferably a colorant, and the content of carboxyl end groups in polymer blend PB2 and / or polymer product PP1 is 100 mmol / kg or less, preferably 90 mmol / kg or less, further preferably 80 mmol / kg or less, further preferably 75 mmol / kg or less, further preferably 74.9 mmol / kg or less, further preferably 74.8 mmol / kg or less, further preferably 74.7 mmol / kg or less, further preferably The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the carboxyl group is preferably 74.6 mmol / kg or less, more preferably 74.5 mmol / kg or less, even more preferably 74.4 mmol / kg or less, even more preferably 74.3 mmol / kg or less, even more preferably 74.2 mmol / kg or less, even more preferably 74.1 mmol / kg or less, even more preferably 74.0 mmol / kg or less, even more preferably 70 mmol / kg or less, even more preferably 50 mmol / kg or less, even more preferably 25 mmol / kg or less.

[0176] 43. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein preferably polymer PM1 is a polyamide and / or preferably polymer blend PB1 and / or polymer blend PB2 comprise an additive, preferably a colorant, and wherein polymer blend PB2 and / or polymer product PP1 have a ratio of carboxyl end group content [mmol / kg] to amino end group content [mmol / kg] of 0.1 or more, preferably 1 or more, further preferably 2 or more, further preferably 3 or more, further preferably 4 or more, further preferably 5 or more, further preferably 6 or more, further preferably 7 or more, further preferably 8.0 or more, further preferably 8.2 or more, further preferably 8.5 or more, further preferably 9.0 or more, further preferably 9.8 or more, further preferably 10.0 or more.

[0177] 44. The process, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein preferably polymer PM1 is a polyamide and / or preferably polymer blend PB1 and / or polymer blend PB2 comprise an additive, preferably a colorant, and wherein the ratio of the content of carboxyl end groups [mmol / kg] to the content of amino end groups [mmol / kg] of polymer blend PB2 is 100 or less, preferably 50 or less, further preferably 25 or less, further preferably 20 or less, further preferably 15 or less, further preferably 11 or less, further preferably 10.0 or less, further preferably 9.8 or less, further preferably 9.5 or less, further preferably 9.3 or less, further preferably 8.1 or less.

[0178] 45. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the extractables content of polymer blend PB1 and / or polymer blend PB2 and / or polymer product PP1 is 0 wt% or more, preferably 0.1 wt% or more, more preferably 0.1 wt% or more, even more preferably 0.2 wt% or more, even more preferably 0.3 wt% or more, even more preferably 0.5 wt% or more, even more preferably 0.8 wt% or more, even more preferably 1.0 wt% or more, even more preferably 1.2 wt% or more, even more preferably 1.4 wt% or more, even more preferably 1.6 wt% or more, even more preferably 1.8 wt% or more, even more preferably 2.0 wt% or more, even more preferably 2.2 wt% or more, even more preferably 2.5 wt% or more, even more preferably 2.8 wt% or more, even more preferably 3.0 wt% or more.

[0179] 46. ​​The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the content of extractables of polymer blend PB1 and / or polymer blend PB2 and / or polymer product PP1 is 5 wt% or less, preferably 4 wt% or less, even more preferably 3.5 wt% or less, even more preferably 3.2 wt% or less, even more preferably 3.0 wt% or less, even more preferably 2.5 wt% or less, even more preferably 2.0 wt% or less, even more preferably 1.8 wt% or less, even more preferably 1.3 wt% or less, even more preferably 1.0 wt% or less, even more preferably 0.8 wt% or less, even more preferably 0.6 wt% or less.

[0180] 47. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the relative viscosity of polymer blend PB1 and / or polymer blend PB2 and / or polymer product PP1 is 2.00 or more, preferably 2.10 or more, more preferably 2.20 or more, even more preferably 2.20 or more, even more preferably 2.21 or more, even more preferably 2.22 or more, even more preferably 2.274 or more, even more preferably 2.275 or more, even more preferably 2.276 or more, even more preferably 2.30 or more, even more preferably 2.40 or more.

[0181] 48. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the relative viscosity of polymer blend PB1 and / or polymer blend PB2 and / or polymer product PP1 is 4.00 or less, preferably 3.50 or less, more preferably 3.00 or less, even more preferably 2.50 or less, even more preferably 2.45 or less, even more preferably 2.40 or less, even more preferably 2.30 or less, even more preferably 2.28 or less, even more preferably 2.27 or less.

[0182] 49. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the polymer blend PB1 is a woven fabric, a yarn, a monofilament, a foam and / or an injection molded article, an extruded film, and mixtures thereof, preferably a woven fabric.

[0183] 50. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein polymer blend PB1 and / or polymer blend PB2 and / or polymer product PP1 are solid at 25°C, preferably 50°C, more preferably 75°C.

[0184] 51. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein polymer blend PB1 and / or polymer blend PB2 and / or polymer product PP1 comprise, preferably consist of, polymer PM1 and polymer PM2 and one or more additives A1.

[0185] 52. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 comprise at least 0.1% by weight, preferably at least 1% by weight, more preferably at least 5% by weight, even more preferably at least 10% by weight, even more preferably at least 20% by weight, even more preferably at least 30% by weight, even more preferably at least 40% by weight, even more preferably at least 50% by weight, even more preferably at least 60% by weight, even more preferably at least 70% by weight, even more preferably at least 80% by weight, even more preferably at least 90% by weight, even more preferably at least 91% by weight, even more preferably at least 95% by weight, even more preferably at least 96% by weight of polymer PM1, with respect to solvent S2, polymer blend PB1, polymer blend PB2 and polymer product PP1, respectively.

[0186] 53. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 comprise 99.9% by weight or less, preferably 98% by weight or less, even more preferably 95% by weight or less, even more preferably 90% by weight or less, even more preferably 80% by weight or less, even more preferably 70% by weight or less, even more preferably 60% by weight or less, even more preferably 50% by weight or less, even more preferably 40% by weight or less, even more preferably 30% by weight or less, even more preferably 20% by weight or less, even more preferably 10% by weight or less, even more preferably 5% by weight or less of polymer PM1, with respect to solvent S2, polymer blend PB1, polymer blend PB2 and polymer product PP1, respectively.

[0187] 54. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 comprise at least 0.01% by weight, preferably at least 0.1% by weight, more preferably at least 1% by weight, even more preferably at least 3% by weight, even more preferably at least 5% by weight, even more preferably at least 10% by weight, even more preferably at least 25% by weight, even more preferably at least 40% by weight, even more preferably at least 50% by weight, even more preferably at least 60% by weight, even more preferably at least 70% by weight, even more preferably at least 80% by weight, even more preferably at least 90% by weight, even more preferably at least 95% by weight of polymer PM2, with respect to solvent S2, polymer blend PB1, polymer blend PB2 and polymer product PP1, respectively.

[0188] 55. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 comprise 99.9% by weight or less, preferably 98% by weight or less, even more preferably 95% by weight or less, even more preferably 90% by weight or less, even more preferably 80% by weight or less, even more preferably 70% by weight or less, even more preferably 60% by weight or less, even more preferably 50% by weight or less, even more preferably 40% by weight or less, even more preferably 30% by weight or less, even more preferably 20% by weight or less, even more preferably 10% by weight or less, even more preferably 5% by weight or less, even more preferably 3% by weight or less, even more preferably 2% by weight or less, even more preferably 1% by weight or less, even more preferably 0.5% by weight or less, even more preferably 0.1% by weight or less, even more preferably 0.01% by weight or less, even more preferably 0.001% by weight or less of polymer PM2, with respect to solvent S2, polymer blend PB1, polymer blend PB2 and polymer product PP1, respectively.

[0189] 56. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 comprise at least 0.1% by weight, preferably at least 1% by weight, more preferably at least 5% by weight, even more preferably at least 10% by weight, even more preferably at least 20% by weight, even more preferably at least 30% by weight, even more preferably at least 40% by weight, even more preferably at least 50% by weight, even more preferably at least 60% by weight, even more preferably at least 70% by weight, even more preferably at least 80% by weight, even more preferably at least 90% by weight, even more preferably at least 95% by weight of polymers PM1 and PM2, with respect to solvent S2, polymer blend PB1, polymer blend PB2 and polymer product PP1, respectively.

[0190] 57. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 comprise 99.9% by weight or less, preferably 98% by weight or less, even more preferably 95% by weight or less, even more preferably 90% by weight or less, even more preferably 80% by weight or less, even more preferably 70% by weight or less, even more preferably 60% by weight or less, even more preferably 50% by weight or less, even more preferably 40% by weight or less, even more preferably 30% by weight or less, even more preferably 20% by weight or less, even more preferably 10% by weight or less, even more preferably 5% by weight or less, even more preferably 2% by weight or less, even more preferably 1% by weight or less, even more preferably 0.5% by weight or less, even more preferably 0.1% by weight or less, even more preferably 0.01% by weight or less, even more preferably 0.001% by weight or less of polymer PM1 and polymer PM2, with respect to solvent S2, polymer blend PB1, polymer blend PB2 and polymer product PP1, respectively.

[0191] 58. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the polymer PM1 and / or polymer PM3 is obtainable by polymerizing a solvent SO1, optionally together with monomers MO1, MO2, MO3 and / or MO4.

[0192] 59. The polymer PM1 and / or the polymer PM3 are preferably PA4, PA5, PA6, PA7, PA8, PA9, PA10, PA11, PA12, PA45, PA4.6, PA5.5, PA5.6, PA6.6, PA6 / 6.6, PA6.9, PA5.10, PA6.10, PA6.12, PA6 / 6.36, PA6.6 / 6.36, PA9.6, PA9.9, PA9.10, PA9.12, PA12.12, PA6.T, PA8.T, PA9.T, PA10.T, PA12.T, PA6.I, PA8.I, PA9.I, PA10.I, PA12.I, PA6.T / 6, PA6.T / 10, PA6.T / 12, PA6.T / 6.I, PA6.T / 8.T, PA6.T / 9.T, PA6.T / 10.T, PA6.T / 12.T, PA12.T / 6.T, PA6.T / 6.I / 6, PA6.T / 6.I / 12, PA6.T / 6.I / 6.10, PA6.T / 6.I / 6.12, PA6.T / 6.6, PA6.T / 6.10, PA6.T / 6.12, PA10.T / 6, PA10.T / 11, PA10.T / 12, PA8.T / 6.T, PA8.T / 66, PA8.T / 8.I, PA8.T / 8.6, PA8.T / 6.I, PA10.T / 6.T, PA10.T / 6.6, PA10.T / 10.I, PA10.T / 10.I / 6.T, PA10.T / 6.I, PA4.T / 4.I / 4.6, PA4.T / 4.I / 6.6, PA5.T / 5.I, PA5.T / 5.I / 5.6, PA5.T / 5.I / 6.6, PA6.T / 6.I / 6.6, PAMXDA.6, PAIPDA.I, PAIPDA.T, PAMACM.I, PAMACM.T, PAPACM.I, PAPACM.T, PAMXDA.I, PAMXDA.T, PA6.T / IPDA.T, PA6.T / MACM.T, PA6.T / PACM.T, PA6.T / MXDA.T, PA6.T / 6.I / 8.T / 8.I, PA6.T / 6.I / 10.T / 10.I, PA6.T / 6.I / IPDA.T / IPDA.I, PA6.T / 6.I / MXDA.T / MXDA.I, PA6.T / 6.I / MACM.T / MACM.I, PA6.T / 6.I / PACM.T / PACM.I, PA6.T / 10.T / IPDA.T, PA6.T / 12.T / IPDA.T, PA6.T / 10.T / PACM.T, PA6.T / 12.T / PACM.T, PA10.T / IPDA.and copolymers and blends thereof; preferably PA6 and PA6.6; and copolymers and blends thereof, and more preferably, polymer PM1 and / or polymer PM3 are PA6 and / or PA6.6, and even more preferably, polymer PM1 and / or polymer PM3 are PA6.

[0193] 60. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the polymer PM1 is not a polyurea, preferably not a polyurethane and not a polyurea.

[0194] 61. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein polymer PM1 and / or polymer PM3 is polyethylene terephthalate (PET).

[0195] 62. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein polymer PM1 and / or polymer PM3 are polyesters and / or cellulosic polymers.

[0196] 63. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the solubility of polymer PM1 in solvent S1 is 4 g / L or less, preferably 3 g / L or less, more preferably 2 g / L or less, even more preferably 1 g / L or less, and even more preferably 0.1 g / L or less.

[0197] 64. The method, use, polymer blend PB2 and / or polymer product PP1 according to any one of the preceding items, wherein polymer PM2 and / or polymer PM3 and / or polymer PM4 is a polyurethane and / or polyurea, preferably a thermoset and / or thermoplastic polyurethane or polyurea or a mixture thereof, more preferably a thermoplastic polyurethane or polyurea or a mixture thereof, more preferably a thermoplastic polyurethane based on an aromatic isocyanate and / or a thermoplastic polyurethane based on an aliphatic isocyanate.

[0198] 65. Polymer PM2 and / or polymer PM3 and / or polymer PM4 are polyurethanes and / or polyureas, preferably polyureas obtainable by composition A and composition B, Composition A comprises a compound containing at least two, preferably two or three, isocyanate groups, preferably composition A comprises a compound selected from aliphatic, cycloaliphatic and aromatic compounds containing at least two, preferably two or three, isocyanate groups, more preferably the compound is selected from 2,2'-, 2,4'- and 4,4'-methylenediphenyl diisocyanate (MDI) and its homologues, isophorone diisocyanate (IPDI), 2,4- and 2,6-toluene diisocyanate (TDI), tetramethylene diisocyanate, hexamethylene diisocyanate (HDI), naphthylene diisocyanate (NDI) and oligomers and mixtures thereof, composition B comprises a compound comprising at least two alcohol groups, preferably compound B is selected from aliphatic, cycloaliphatic and aromatic compounds comprising at least two alcohol groups, more preferably composition B comprises a compound selected from polyols, polyether polyols, polyester polyols and mixtures thereof, even more preferably composition B comprises a compound having a molecular weight of 400 g / mol to 15000 g / mol, selected from polyols, polyether polyols, polyester polyols and mixtures thereof, and / or composition B comprises a compound containing at least two functional groups reactive towards isocyanate groups, preferably at least two functional groups selected from alcohols, amines and mixtures thereof; and / or 10. The process, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein Composition B comprises water, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, neopentyl glycol, 1,6-hexanediol, 1,4-cyclohexanedimethanol, hydroquinone bis(2-hydroxyethyl)ether, ethanolamine, diethanolamine, methyldiethanolamine, phenyldiethanolamine, glycerol, trimethylolpropane, 1,2,6-hexanetriol, triethanolamine, pentaerythritol, N,N,N',N'-tetrakis(2-hydroxypropyl)ethylenediamine, diethyltoluenediamine, dimethylthiotoluenediamine, and mixtures thereof, optionally copolymerized with an epoxide compound, preferably ethylene oxide and / or propylene oxide.

[0199] 66. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the solubility of polymer PM2 and / or polymer PM4 in solvent S1 is 3 g / L or more, preferably 4 g / L or more, more preferably 5 g / L or more, even more preferably 10 g / L or more, even more preferably 15 g / L or more, even more preferably 25 g / L or more, even more preferably 50 g / L or more, even more preferably 100 g / L or more, even more preferably 200 g / L or more.

[0200] 67. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein polymer PM2 and / or polymer PM4 are not polyamides.

[0201] 68. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein polymer PM2 and polymer PM3 are the same, and / or polymer PM2 and polymer PM4 are the same, and / or polymer PM3 and polymer PM4 are the same, preferably polymer PM2, polymer PM3 and polymer PM4 are the same.

[0202] 69. Polymer PM3 is polyamide (PA), polyurethane (PU), low-density polyethylene (LDPE), high-density polyethylene (HDPE), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polytetrafluoroethylene (Teflon), thermoplastic polyurethane (TPU), poly(methyl acrylate) (PMA), poly(methyl methacrylate) (PMMA), polybutadiene (BR, PBD), poly(cis-1,4-isoprene), poly(trans-1,4-isoprene), poly 2. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the polymer is selected from polyoxymethylene (POM), polyethylene terephthalate (PET), polyhydroxyalkanoate (PHA), poly-3-hydroxybutyrate (P3HB), poly-4-hydroxybutyrate (P4HB), polyhydroxyvalerate (PHV), polyhydroxyhexanoate (PHH), polyhydroxyoctanoate (PHO), and copolymers and mixtures thereof.

[0203] 70. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein polymer PM1 and polymer PM3 are the same.

[0204] 71. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein polymer blend PB1, preferably polymer blend PB1 and / or polymer blend PB2, more preferably polymer blend PB1 and / or polymer blend PB2 and / or solvent blend SO2, comprises one or more additives A1.

[0205] 72. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein additive A1 is selected from fibers, antioxidants, stabilizers, lubricants, minerals, colorants, pigments, soot, talc and mixtures thereof.

[0206] 73. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein additive A1 complies with at least one of Gulf Cooperation Council Standardization Organization GSO 2231 / 2012, and / or GSO 839 / 1997, and / or GSO 1863 / 2013 standards or is Halal certified, and / or Kosher certified, and / or HACCP certified.

[0207] 74. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S1 comprises solvent SO2, and solvent SO1 and solvent SO2 are not the same.

[0208] 75. The process, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S1 does not contain dimethylformamide DMF, preferably dimethylformamide DMF, dimethylacetamide DMAc and / or N-methyl-2-pyrrolidone NMP.

[0209] 76. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the content of solvent SO1 and / or, preferably, solvent SO2 in solvent S1 is 20% by weight or more, preferably 30% by weight or more, even more preferably 50% by weight or more, even more preferably 75% by weight or more, even more preferably 80% by weight or more, even more preferably 85% by weight or more, even more preferably 90% by weight or more, even more preferably 95% by weight or more, even more preferably 98% by weight or more, and even more preferably the solvent blend consists of solvent SO1 and solvent SO2, preferably solvent SO1.

[0210] 77. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent SO1 and solvent SO2 are miscible, preferably at 25°C and / or at the temperature used in the contacting step.

[0211] 78. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S1 is preferably a homogeneous solvent blend at 25°C and / or at the temperature used in the contacting step.

[0212] 79. In the following equation:

number

[0213] 80. In the following equation:

number

[0214] 81. In the following equation:

number

[0215] 82. In the following equation:

number

[0216] 83. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the ratio of solvent SO1 to solvent SO2 [wt / wt] is 0.01 or greater and 100 or less, preferably 0.03 or greater and 30 or less, more preferably 0.05 or greater and 5 or less, even more preferably 0.10 or greater and 1 or less, and even more preferably 0.15 or greater and 0.50 or less.

[0217] 84. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent SO1 and / or, preferably, solvent SO2 are protic solvents.

[0218] 85. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the melting point of solvent SO1 is higher than the melting point of solvent SO2.

[0219] 86. In the following equation: [MP]A-[MP]B≧z1 [MP]A is the melting point of the solvent SO1 (°C), [MP]B is the melting point of the solvent SO2 (°C), The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein z1 is 5°C, preferably 25°C, more preferably 50°C, even more preferably 75°C, even more preferably 100°C, even more preferably 125°C, even more preferably 150°C, even more preferably 160°C.

[0220] 87. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the melting point of solvent S1 is 0°C or higher, preferably 25°C or higher, more preferably 50°C or higher, even more preferably 55°C or higher, even more preferably 60°C or higher, even more preferably 65°C or higher, even more preferably 70°C or higher.

[0221] 88. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the melting point of solvent S1 is 250°C or less, preferably 200°C or less, more preferably 150°C or less, even more preferably 125°C or less, even more preferably 100°C or less, even more preferably 90°C or less, even more preferably 80°C or less, even more preferably 80°C or less, even more preferably 70°C or less, even more preferably 60°C or less, even more preferably 50°C or less, even more preferably 30°C or less, even more preferably 25°C or less, even more preferably 20°C or less, even more preferably 15°C or less.

[0222] 89. A method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent SO1 can be polymerized, preferably optionally together with monomers MO1 and / or MO2 and / or MO3, to obtain polymer PM1.

[0223] 90. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the solvent SO1 comprises, and preferably consists of, the elements C, O and H, preferably C, O, N and H.

[0224] 91. The process, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent SO1 is an amide, preferably a lactam, preferably 2-pyrrolidone, 2-piperidone, caprolactam, and / or laurolactam, more preferably caprolactam and / or laurolactam, more preferably caprolactam, even more preferably ε-caprolactam.

[0225] 92. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the solvent SO2 comprises the elements O and H, preferably C, O and H.

[0226] 93. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the solvent SO2 contains —OH groups and is preferably water and / or an alcohol, preferably methanol, ethanol, propanol and / or water, more preferably water.

[0227] 94. The solvent SO2 has a log K value between water and octanol-water, ranging from -1.6 to +1.6. OW and preferably water, C5 to C12 alkanes, aliphatic C1 to C10 alcohols, C3 to C10 ketones, C2 to C10 cyclic ketones, HO-[C1 to C10 alkyl-O-] n -H (n is an integer in the range of 2 to 1000), C1 to C10 alkyl-O-C3 to C10 alkyl ether, C3 to C10 cyclic ether (which may be substituted with one or more C1 to C6 alkyl groups), C6 to C10 aromatic hydrocarbon (which may be substituted with one or more C1 to C6 alkyl groups), C2 to C10 aliphatic ester, C8 to C11 aromatic ester, C5 to C10 cyclic carboxylic acid ester (lactone), C3 to C12 amide, preferably R1R2N-C(=O)-R3 (wherein R1 and R2 are independently a C1 to C4 alkyl group, and R3 is a C1 to C9 alkyl group, C1 to C the process, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the copolymer is selected from the group consisting of C1-C6 alkyl groups, C1-C6 ester groups and C1-C6 ether groups, C3-C6 lactams (optionally substituted by one or more substituents selected from C1-C6 alkyl groups, C1-C6 ester groups and C1-C6 ether groups), and C5 imidazolidines (optionally substituted by one or more C1-C6 alkyl groups), C5-C7 imidazolidones (optionally substituted by one or more C1-C6 alkyl groups).

[0228] 95. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the boiling point of the solvent SO2 is 0°C to 150°C, preferably 10°C to 120°C, more preferably 20°C to 110°C, more preferably 30°C to 100°C, more preferably 50°C to 90°C, and even more preferably 60°C to 80°C.

[0229] 96. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S2 comprises the same solvent as solvent S1, and / or solvent S2 comprises solvent SO1, preferably and solvent SO2.

[0230] 97. The process, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S2 comprises one or more, preferably two solvents selected from the list consisting of a lactam, preferably caprolactam, methanol, ethanol, propanol, isopropanol, acetonitrile, ethyl acetate, acetone and water, preferably a lactam, preferably caprolactam, and water and / or methanol, more preferably a lactam, preferably caprolactam and water.

[0231] 98. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the polymer product PP1, PP2, PP3 and / or PP4 is a woven fabric, a yarn, a monofilament, a foam, a granulate, a foil, an injection molded article and / or an extruded film, and mixtures thereof, preferably a woven fabric.

[0232] 99. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the polymer product PP1, PP2, PP3 and / or PP4 comprises at least 1% of polymer PM1 and / or polymer PM3, preferably obtained or obtainable by a method according to any one of the preceding items.

[0233] 100. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the polymer product PP1, PP2, PP3 and / or PP4 comprises polymer PM1.

[0234] 101. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the polymer product PP1, PP2, PP3 and / or PP4 comprises polymer PM2.

[0235] 102. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the polymer product PP1, PP2, PP3 and / or PP4 comprises polymer PM3.

[0236] 103. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the polymer product PP1, PP2, PP3 and / or PP4 comprises polymer PM4.

[0237] 104. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the polymer blend PB2 and / or the polymer products PP1, PP2, PP3 and / or PP4 are amorphous.

[0238] 105. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the polymer blend PB2 and / or the polymer products PP1, PP2, PP3 and / or PP4 are semi-crystalline.

[0239] 106. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the recycled content in the polymer products PP1, PP2, PP3 and / or PP4 is 5% by weight or more, preferably 10% by weight or more, more preferably 20% by weight or more, even more preferably 25% by weight or more, even more preferably 30% by weight or more, even more preferably 35% by weight or more, even more preferably 50% by weight or more, even more preferably 75% by weight or more, even more preferably 80% by weight or more, even more preferably about 100% by weight.

[0240] 107. The process, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the monomers MO1 and / or MO3 are lactams, preferably caprolactam, more preferably ε-caprolactam.

[0241] 108. Monomer MO1 and / or monomer MO2 and / or monomer MO3 and / or monomer MO4 are not particularly limited to polyamide (PA), polyurethane (PU), low-density polyethylene (LDPE), high-density polyethylene (HDPE), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polytetrafluoroethylene (Teflon), thermoplastic polyurethane (TPU), poly(methyl acrylate) (PMA), poly(methyl methacrylate) (PMMA), polybutadiene (BR, PBD), poly(cis-1,4-isoprene), poly(trans-1,4-isoprene), poly(methyl acrylate), poly(methyl meth ... 10. The process, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the hydroxypropyl methylcellulose (HMP) is a monomer that can be polymerized, optionally together with further monomers, to obtain a polymer selected from polyhydroxypropyl methylcellulose (POM), polyoxymethylene (POM), polyethylene terephthalate (PET), polyhydroxyalkanoate (PHA), poly-3-hydroxybutyrate (P3HB), poly-4-hydroxybutyrate (P4HB), polyhydroxyvalerate (PHV), polyhydroxyhexanoate (PHH), polyhydroxyoctanoate (PHO), and copolymers and mixtures thereof.

[0242] 109. Polymer blend PB2 and / or polymer products PP1, PP2, PP3 and / or PP4 exhibit improved processability, and / or Polymer blend PB2 and / or polymer products PP1, PP2, PP3 and / or PP4 exhibit improved skin sensitivity, and / or Polymer blend PB2 and / or polymer products PP1, PP2, PP3 and / or PP4 exhibit an improved carbon footprint; The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items.

[0243] 110. Solvent S1 is solvent blend SB1; The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items.

[0244] 111. Solvent S1 consists of solvent SO1; The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items.

[0245] 112. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S1 comprises, and preferably consists of, solvent SO1 and solvent SO2.

[0246] 113. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S2 comprises, preferably consists of, solvent SO1, preferably solvent SO1, polymer PM2 and one or more additives, more preferably solvent SO1, solvent SO2, polymer PM2 and one or more additives, more preferably solvent SO1, solvent SO2, polymer PM1, polymer PM2 and one or more additives.

[0247] 114. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S2 is solvent blend SB2.

[0248] 115. The process, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S1 and / or, preferably, solvent S2, do not comprise dimethylformamide DMF, dimethylacetamide DMAc, 1-methylpyrrolidin-2-one NMP, 2-pyrrolidone, 2-piperidone, 2,2'-diaminodiethylamine (DETA), diisopropylamine, pyridine, pentylamine, N,N-diethylethanamine, diethylene glycol, tetrahydrofuran THF, hexamethylphosphoramide HMPA, acetonitrile, dimethyl sulfoxide DMSO, and / or, preferably, 1,4-butanediol.

[0249] 116. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein polymer PM2 and / or polymer PM3 and / or polymer PM4 comprise, preferably consist of, polyurethane and / or polyurea, further preferably polyurea, further preferably a copolymer comprising polyurea, further preferably a polyether-polyurea copolymer.

[0250] 117. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the solvent SO1 is a monoalcohol, preferably methanol and / or ethanol, more preferably methanol.

[0251] 118. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the solvent in solvent S1 and the solvent in solvent S2 are the same.

[0252] 119. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the polymer product PP1 and / or polymer product PP2 and / or polymer product PP3 and / or polymer product PP4 is in the form of a foil, granules, powder, laminate, foam, molded article or pipe.

[0253] 120. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the polymer product PP1 and / or polymer product PP2 and / or polymer product PP3 and / or polymer product PP4 is or is part of: Parts of cars; preferably cylinder head covers, engine covers, housings for charge air coolers, charge air cooler flaps, intake pipes, intake manifolds, connectors, gear wheels, fan wheels, coolant boxes, housings, housing parts for heat exchangers, coolant coolers, charge air coolers, thermostats, water pumps, radiators, fasteners, parts of battery systems for electromobility, dashboards, steering column switches, seats, headrests, centre consoles, transmission parts, door modules, A, B, C or D pillar covers, spoilers, door handles, exterior mirrors, windscreen wipers, windscreen wiper protective housings, decorative grilles, cover strips, roof rails, window frames, sunroof frames, antenna panels, headlights and taillights, engine covers, cylinder head covers, intake manifolds, airbags, cushions or coatings; Clothing materials; preferably shirts, trousers, pullovers, boots, shoes, soles, tights or jackets; Electrical components; preferably electrical or electronic passive or active components, circuit breakers, circuit boards, printed circuit boards, terminal blocks, housing parts, foils, lines, switches, switchgear, plugs, sockets, distributors, relays, resistors, capacitors, inductors, bobbins, lamps, diodes, LEDs, transistors, connectors, regulators, integrated circuits (ICs), processors, controllers, memories, sensors, microswitches, microbuttons, semiconductors, reflector housings for light emitting diodes (LEDs), fasteners for electrical or electronic components, spacers, bolts, strips, slide-in guides, screws, nuts, film hinges, snap hooks (snap-ins) or spring tongues; consumer products, agricultural products or pharmaceuticals; preferably tennis strings, climbing ropes, bristles, brushes, artificial grass, 3D printing filaments, grass cutters, zippers, hook and loop fasteners, papermaking equipment, extrusion coatings, fishing lines, fishing nets, marine lines and ropes, vials, syringes, ampoules, bottles, sliding elements, spindle nuts, chain conveyors, plain bearings, rollers, wheels, gears, rollers, ring gears, screw and spring dampers, hoses, pipelines, cable jacketing, sockets, switches, cable ties, fan wheels, carpets, cosmetic boxes or bottles, mattresses, cushions, insulation, detergents, dish washing tabs or powders, shampoos, body washes, shower gels, soaps, fertilisers, fungicides or insecticides; Packaging for the food industry; preferably single or multi-layer blown films, cast films (single or multi-layer), biaxially oriented films or laminated films; or Part of a structure; preferably a rotor blade, an insulating material, a frame, a housing, a wall, a coating or a separating wall.

[0254] 121. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the content of solvent SO1 in solvent S1 and / or, preferably, solvent S2 is 20% by weight or more, preferably 30% by weight or more, further preferably 50% by weight or more, further preferably 75% by weight or more, further preferably 80% by weight or more, further preferably 85% by weight or more, further preferably 90% by weight or more, further preferably 95% by weight or more, further preferably 98% by weight or more, and further preferably, the solvent blend consists of solvent SO1 and solvent SO2, preferably solvent SO1.

[0255] 122. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the content of solvent SO1 in solvent S1 and / or, preferably, solvent S2 is 100% by weight or less, preferably 99% by weight or less, further preferably 95% by weight or less, further preferably 90% by weight or less, further preferably 85% by weight or less, further preferably 80% by weight or less, further preferably 75% by weight or less, further preferably 70% by weight or less, further preferably 50% by weight or less.

[0256] 123. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the content of solvent SO2 in solvent S1 and / or, preferably, solvent S2 is 1% by weight or more, preferably 2% by weight or more, further preferably 5% by weight or more, further preferably 8% by weight or more, further preferably 10% by weight or more, further preferably 15% by weight or more, further preferably 20% by weight or more, further preferably 30% by weight or more, further preferably 40% by weight or more, further preferably 50% by weight or more.

[0257] 124. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein the content of solvent SO2 in solvent S1 and / or, preferably, solvent S2 is 100% by weight or less, preferably 50% by weight or less, further preferably 30% by weight or less, further preferably 25% by weight or less, further preferably 22% by weight or less, further preferably 18% by weight or less, further preferably 15% by weight or less, further preferably 12% by weight or less, further preferably 10% by weight or less.

[0258] 125. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein in solvent S1 and / or, preferably, and solvent S2, the ratio (weight / weight) of the content of solvent SO2 to the content of solvent SO1 is 0.01 to 0.50, preferably 0.05 to 0.40, more preferably 0.10 to 0.30, and even more preferably 0.15 to 0.25.

[0259] 126. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein polymer blend PB1 and / or polymer blend PB2 and / or polymer product comprises, preferably consists of, polymer PM1, polymer PM2 and one or more additives.

[0260] 127. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 comprises, with respect to solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1, 0.1% by weight or more, preferably 1% by weight or more, even more preferably 5% by weight or more, even more preferably 10% by weight or more, even more preferably 20% by weight or more, even more preferably 30% by weight or more, even more preferably 40% by weight or more, even more preferably 50% by weight or more, even more preferably 60% by weight or more, even more preferably 70% by weight or more, even more preferably 80% by weight or more, even more preferably 90% by weight or more, even more preferably 91% by weight or more, even more preferably 95% by weight or more, even more preferably 96% by weight or more of polymer PM1.

[0261] 128. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 comprises 99.9% by weight or less, preferably 98% by weight or less, even more preferably 95% by weight or less, even more preferably 90% by weight or less, even more preferably 80% by weight or less, even more preferably 70% by weight or less, even more preferably 60% by weight or less, even more preferably 50% by weight or less, even more preferably 40% by weight or less, even more preferably 30% by weight or less, even more preferably 20% by weight or less, even more preferably 10% by weight or less, even more preferably 5% by weight or less, even more preferably 2% by weight or less, even more preferably 1% by weight or less, even more preferably 0.5% by weight or less, even more preferably 0.1% by weight or less, even more preferably 0.01% by weight or less, even more preferably 0.001% by weight or less of polymer PM1, relative to solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1.

[0262] 129. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 comprises, with respect to solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1, 0.1% by weight or more, preferably 1% by weight or more, even more preferably 5% by weight or more, even more preferably 10% by weight or more, even more preferably 20% by weight or more, even more preferably 30% by weight or more, even more preferably 40% by weight or more, even more preferably 50% by weight or more, even more preferably 60% by weight or more, even more preferably 70% by weight or more, even more preferably 80% by weight or more, even more preferably 90% by weight or more, even more preferably 91% by weight or more, even more preferably 95% by weight or more, even more preferably 96% by weight or more of polymer PM2.

[0263] 130. The method, use, polymer, polymer blend, polyol composition and / or polymer product according to any one of the preceding items, wherein solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1 comprises, with respect to solvent S2, polymer blend PB1, polymer blend PB2 and / or polymer product PP1, 99.9% by weight or less, preferably 98% by weight or less, even more preferably 95% by weight or less, even more preferably 90% by weight or less, even more preferably 80% by weight or less, even more preferably 70% by weight or less, even more preferably 60% by weight or less, even more preferably 50% by weight or less, even more preferably 40% by weight or less, even more preferably 30% by weight or less, even more preferably 20% by weight or less, even more preferably 10% by weight or less, even more preferably 5% by weight or less, even more preferably 2% by weight or less, even more preferably 1% by weight or less, even more preferably 0.5% by weight or less, even more preferably 0.1% by weight or less, even more preferably 0.01% by weight or less, even more preferably 0.001% by weight or less of polymer PM2. [Example]

[0264] General Procedure Polymer blend PB1, containing a polymer material, i.e., polyamide, polyurethane, and / or polyurea, and a colorant, was cut into small pieces and placed in a reaction vessel (e.g., a flask, tube, or reactor). ε-caprolactam (99.7%) was premelted at 85°C, and a caprolactam-water mixture (20 wt% water) or a caprolactam-methanol mixture (10 wt% methanol) was prepared and added, resulting in a fabric:solvent ratio of 1:10 (wt / wt). When caprolactam was used, the mixture was heated to 85°C. When caprolactam / water or caprolactam / methanol was used, the mixture was heated to 25°C or 50°C using an oil bath, respectively. After 16 hours, the fabric was separated from the liquid phase by decantation to obtain extracted fabric pieces. The fabric pieces were then washed with water and dried in a vacuum at 80°C.

[0265] Samples were analyzed before treatment and after the final drying step (polymeric material depleted of elastic fibers). 1 H-NMR was performed to determine the polyamide content, and IR spectroscopy was performed to show the changes in characteristic peaks before and after treatment and compared with known spectra of polyamide and elastic fibers based on polyurethanes, polyureas, and polyethers.

[0266] Reference and Examples 1-4 Materials from tights containing elastic fibers, i.e., polyurea and polyamide 6.6, were treated as described in the general procedure. The type of polymer material, the experimental conditions, and the results are shown in Table 1. Samples were analyzed before treatment and after the final drying step to quantitatively determine the degree of oxidative stress. 1 H-NMR was measured to determine the polyamide (PA) content before and after separation, and IR spectroscopy was performed to demonstrate the changes in peaks before and after separation and compare them with known spectra of polyamides.

[0267] [Table 1]

[0268] 1H-NMR showed no peaks indicating the presence of residual elastic fibers, and the overall PA was ≥90%. As a result, the elastic fibers were completely removed. Figure 4 shows a comparison of the IR spectra of the elastic fibers (1) and the polymer material (tights) before (2) and after (3) treatment.

[0269] Based on IR spectroscopy, the following was shown: a) The elastic fibers were based on polyureas and polyethers, specifically polyether-polyurea copolymers. b) IR overview of the material before treatment: The spectrum measured before treatment shows that it is composed of polyamide 6.6 (PA6.6) and elastic fibers based on polyurea and polyether, specifically polyether-polyurea copolymers (their characteristic signals are at 1730, 1708 and 1104 cm -1 The mixture was shown to be c) IR profile of the re-obtained PA material: The measured IR spectrum of the re-obtained material showed that the re-obtained material was mainly composed of PA6.6. No additional peaks belonging to elastic fibers were observed.

[0270] It is clearly visible therefrom that the elastic fibers (1) are completely removed after treatment, indicating that the elastic fibers are based on polyurea and polyether.

[0271] In addition, the amino end group (AEG), carboxyl end group (CEG), relative viscosity (RV), extractables, and molecular weight distribution (PDI = M by SEC) were measured. w / M n Analysis of several samples focused on polymer properties such as carboxyl group, carboxyl group, and carboxyl group showed that the end groups remained unchanged, but the extractables were significantly reduced, and the molecular weight distribution subsequently narrowed. [Table 2] [Brief explanation of the drawings]

[0272] [Figure 1]A flowchart of the method described herein is shown. First, a polymer blend PB1 and a solvent S1 are prepared. The polymer blend PB1 includes polymer PM1 and polymer PM2. The solvent S1 includes solvent SO1 and preferably solvent SO2. Solvent SO1 and solvent SO2 are not the same, and the solubility (g / L) of polymer PM1 in solvent S1 is lower than the solubility (g / L) of polymer PM2 in solvent S1. The polymer blend PB1 is then contacted with solvent S1 to obtain a mixture MI1. The mixture MI1 is then separated, preferably by a physical separation method, such as filtration, to obtain a polymer blend PB2 containing polymer PM1 and a solvent S2 containing polymer PM2. The polymer PM4 can be obtained by adding water to solvent S2 or by removing the solvent from solvent S2. The resulting polymer blend PB2 and polymer PM4 can be further processed and converted into a new polymer product PP1. Further processing is shown for polymer PM4 in Figure 2 and polymer blend PB2 in Figure 3. [Figure 2] 10 shows a flow chart of further processing according to the methods described herein. [Figure 3] 1 shows a flowchart of further processing according to the method described herein. Polymer PM4 and / or polymer blend PB2 and / or solvent S2 (not shown) are biodegraded to obtain biomass BM1. The obtained biomass BM1 can be converted into monomer precursor MP1, which can then be converted into monomer MO2, or directly into monomer MO1. [Figure 4] A comparison of the IR spectra of an elastic fiber (1) and a polymer material (tights) before (2) and after (3) treatment.

[0273] In another further processing step, polymer PM4 and / or polymer blend PB2 and / or solvent S2 (not shown) are pyrolyzed to obtain pyrolysis oil and / or pyrolysis gas PY1, which are then steam cracked to obtain precursor MP1, which is then converted to monomer MO1.

[0274] The mixture MI2 and / or MI3 can be polymerized directly, or the monomers MO1 and / or MO2 can be polymerized to give the polymer PM3. Finally, the polymer PM3 can be formed to give the polymer product PP1.

[0275] In another further processing step, polymer PM4 and / or polymer blend PB2 are depolymerized to obtain a mixture MI2 containing monomer MO2 and a mixture MI3 containing monomer MO4, respectively. These monomers are screened and / or purified and / or separated and then polymerized, preferably with other monomers and / or additives, to obtain polymer PM3, which is then formed to obtain polymer product PP1.

[0276] Many modifications and other embodiments of the inventions described herein will come to mind to one skilled in the art to which these inventions pertain having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. It is to be understood, therefore, that the invention is not to be limited to the specific embodiments disclosed, and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. providing a polymer blend PB1 and a solvent S1; The polymer blend PB1 is i) a polymer PM1, ii) a polymer PM2, The solvent S1 i) a solvent SO1; ii) preferably a solvent SO2, Preferably, the solvent SO1 and the solvent SO2 are not the same, the solubility (g / L) of the polymer PM1 in the solvent S1 is lower than the solubility (g / L) of the polymer PM2 in the solvent S1; contacting the polymer blend PB1 with the solvent S1 to obtain a mixture MI1; and Preferably, a step of separating the mixture MI1 to obtain a polymer blend PB2 containing the polymer PM1 and a solvent S2 containing the polymer PM2. A method comprising:

2. The solvent S1 i) a solvent SO1; ii) a solvent SO2; and Including, The solvent SO1 and the solvent SO2 are not the same; The method of claim 1.

3. 3. The method according to claim 1 or 2, wherein the solvent SO1 is an amide, preferably a lactam, preferably 2-pyrrolidone, 2-piperidone, caprolactam, and / or laurolactam, more preferably caprolactam and / or laurolactam, more preferably caprolactam, more preferably ε-caprolactam.

4. 4. The method according to any one of claims 1 to 3, wherein the solvent SO2 comprises -OH groups and is preferably water and / or an alcohol, preferably methanol, ethanol, propanol and / or water, more preferably water.

5. said solvent S1 and / or said solvent S2, preferably said solvent S1 and said solvent S2, do not comprise dimethylformamide (DMF), dimethylacetamide (DMAc), 1-methylpyrrolidin-2-one (NMP), 2-pyrrolidone, 2-piperidone, 2,2′-diaminodiethylamine (DETA), diisopropylamine, pyridine, pentylamine, N,N-diethylethanamine, diethylene glycol, tetrahydrofuran (THF), hexamethylphosphoramide (HMPA), acetonitrile, dimethylsulfoxide (DMSO), and / or, preferably, 1,4-butanediol; and / or 5. The method according to any one of claims 1 to 4, wherein said polymer PM2 comprises, preferably consists of, a polyurethane and / or a polyurea, more preferably a polyurea, more preferably a copolymer comprising a polyurea, more preferably a polyether-polyurea copolymer.

6. The method according to any one of claims 1 to 5, wherein the boiling point of the solvent SO2 is 0°C to 150°C, preferably 10°C to 120°C, more preferably 20°C to 110°C, more preferably 30°C to 100°C, more preferably 50°C to 90°C, and more preferably 60°C to 80°C.

7. The ratio [weight / weight] of the solvent SO1 to the solvent SO2 is 0.01 or more and 100 or less, preferably 0.03 or more and 30 or less, more preferably 0.05 or more and 5 or less, more preferably 0.10 or more and 1 or less, more preferably 0.15 or more and 0.50 or less. The method according to any one of claims 1 to 6.

8. 8. The method of claim 1, wherein the melting point of the solvent SO1 is higher than the melting point of the solvent SO2.

9. 9. The method of claim 1, wherein in the contacting step, one or more of the following conditions are met: i) said polymer blend PB1 and said solvent S1 are stirred and / or sonicated at least once, preferably for a time t1; ii) the polymer blend PB1 and the solvent S1 are in contact for a time t1; iii) said polymer blend PB1 and said solvent S1 are heated at least once to a temperature T1, preferably for a time t1; Here, the time t1 is 0.1 seconds or more and 7 days or less, preferably 1 minute or more and 48 hours or less, more preferably 1 hour or more and 32 hours or less, and even more preferably 10 hours or more and 20 hours or less, The temperature T1 of the polymer PM1 measured by DSC is 0°C or higher and lower than Tm, preferably 5°C or higher and 250°C or lower, more preferably 10°C or higher and 200°C or lower, even more preferably 12°C or higher and 85°C or lower, even more preferably 15°C or higher and 75°C or lower, even more preferably 17°C or higher and 65°C or lower, even more preferably 20°C or higher and 60°C or lower, even more preferably 25°C or higher and 55°C or lower, and even more preferably 30°C or higher and 50°C or lower.

10. Separating the mixture MI1 to obtain a polymer blend PB2 containing the polymer PM1 and a solvent S2 containing the polymer PM2.

10. The method of claim 1, further comprising:

11. converting said solvent S2 and / or said polymer blend PB2 to obtain monomers, preferably monomers MO1 and / or monomers MO2 and / or monomers MO3, and / or polymers, preferably polymers PM3 and / or polymers PM4, and / or polymer products, preferably polymer product PP1 and / or polymer product PP2 and / or polymer product PP3 and / or polymer product PP4, and / or a polyol composition, preferably polyol composition PC1; 11. The method of claim 1, further comprising:

12. 12. The method of claim 11, further comprising one of the following:

12. Repeating the method according to any one of claims 1 to 11 one or more times to obtain a polymer product PP2, preferably having a content of the polymer product PP1 in the polymer product PP2 equal to the content CO1; a step of recycling the polymer product PP1 one or more times to obtain a polymer product PP3, wherein the content of the polymer product PP1 in the polymer product PP3 is preferably the content CO1; recycling the polymer product PP1 one or more times to obtain a recycled material RM1, and converting or forming the recycled material RM1 to obtain a polymer product PP4 comprising the recycled material RM1, preferably wherein the content of the polymer product PP1 and / or the recycled material RM1 in the polymer product PP4 is the content CO1; Here, the content CO1 is 1% by weight or more, preferably 2% by weight or more, more preferably 5% by weight or more, even more preferably 15% by weight or more, even more preferably 30% by weight or more, even more preferably 40% by weight or more, even more preferably 60% by weight or more, even more preferably 80% by weight or more, even more preferably 90% by weight or more, even more preferably 95% by weight or more, and / or, preferably, and The content CO1 is 100% by weight or less, preferably 95% by weight or less, more preferably 90% by weight or less, even more preferably 50% by weight or less, even more preferably 25% by weight or less, and even more preferably 10% by weight or less, Preferably, said polymer product PP1 and said polymer products PP2, PP3 and / or PP4 are the same.

13. certifying said polymers PM1, PM2, PM3 and / or PM4 and / or said polymer blend PB2 and / or said polymer products PP1, PP2, PP3 and / or PP4 as circular in accordance with a standard or protocol, preferably based on identity integrity and / or segregation and / or mass balance and / or book and claim chain model of management, preferably based on mass balance, preferably based on the International Sustainability Carbon Certification (ISCC) standard.

13. The method of any one of claims 1 to 12, further comprising:

14. 14. A polymer blend PB2, polymer PM3 and / or PM4, polymer product PP1, PP2, PP3 and / or PP4 and / or polyol composition PC1 obtained or obtainable by a process according to any one of claims 1 to 13.

15. Use of the polymer blend PB2, polymer PM3 and / or PM4, polymer products PP1, PP2, PP3 and / or PP4 and / or polyol composition PC1 according to claim 14 or obtainable or obtained by the method according to any one of claims 1 to 13 for the production of a polymer, preferably a polymer product PP1, and / or in a recycling process.

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