(Meth)acrylic compositions containing recycled materials, methods for producing said compositions and uses thereof

Abstract

The present invention relates to (meth)acrylic compositions containing recycled materials, methods for preparing (meth)acrylic compositions, and uses of such (meth)acrylic compositions. In particular, the present invention relates to (meth)acrylic compositions containing recycled materials, either in polymeric or monomeric form, or both, methods for preparing (meth)acrylic compositions, and uses of such (meth)acrylic compositions. The present invention also relates to (meth)acrylic polymer composites containing or made from (meth)acrylic compositions containing recycled materials, methods for preparing such (meth)acrylic polymer composites containing or made from (meth)acrylic compositions containing recycled materials, and articles containing such (meth)acrylic polymer composites containing or made from (meth)acrylic compositions containing recycled materials.

Description

[Technical Field]

[0001] The present invention relates to (meth)acrylic compositions containing recycled materials, methods for preparing (meth)acrylic compositions, and uses of such (meth)acrylic compositions.

[0002] In particular, the present invention relates to (meth)acrylic compositions comprising recycled materials, either in polymeric or monomeric form, or both, methods for preparing (meth)acrylic compositions, and uses of such (meth)acrylic compositions.

[0003] The present invention also relates to (meth)acrylic polymer composites comprising or made from (meth)acrylic compositions containing recycled materials, methods for preparing such (meth)acrylic polymer composites comprising or made from (meth)acrylic compositions containing recycled materials, and articles comprising such (meth)acrylic polymer composites comprising or made from (meth)acrylic compositions containing recycled materials.

[0004] To reduce waste, in the interest of sustainability or sustainable development, many materials are reused and / or recycled, including polymeric and composite materials.

[0005] A composite is a macroscopic combination of two or more immiscible materials. It consists of at least a matrix material, e.g., a polymeric material, which forms the continuous phase for structural binding, and reinforcements of various structures for mechanical properties.

[0006] The purpose of using composite materials is to achieve performance that cannot be achieved by the individual constituent materials if used alone. As a result, composite materials are widely used in several industrial sectors, such as construction, automotive, marine, aerospace, transportation, leisure, electronics, and sports, due to their good mechanical performance (high tensile strength, high tensile modulus, and high fracture toughness) and their low density, especially compared to homogeneous materials.

[0007] The most important class in terms of commercial production volume are composites with an organic matrix, the matrix material of which is generally a polymer. The primary matrix or continuous phase of a polymer composite is either a thermoplastic or a thermosetting polymer.

[0008] One method for preparing polymer composites based on thermoplastic polymers is by using liquid polymer compositions containing monomers, commonly known as "syrups." Such syrups are used to mix with inorganic fillers or to impregnate reinforcing materials such as fibrous substrates; they are then polymerized.

[0009] At the end of the life of an object or article comprising a composite material, the object or article needs to be easily recyclable.

[0010] There is a need for (meth)acrylic and polymeric (meth)acrylic compositions that contain recycled raw materials while maintaining the same properties as (meth)acrylic and polymeric (meth)acrylic compositions that do not use any recycled raw materials, including viscosity, reactivity, stability, mechanical properties, and thermomechanical properties of the liquid compositions.

[0011] There is a need for (meth)acrylic compositions and polymer (meth)acrylic compositions with reduced carbon footprints, preferably less than 3.5 kg / CO2 per kg of (meth)acrylic composition or polymer (meth)acrylic composition, and more preferably less than 3 kg / CO2 per kg of (meth)acrylic composition or polymer (meth)acrylic composition.

[0012] There is also a need to propose a method for producing (meth)acrylic compositions and polymeric (meth)acrylic compositions with a reduced carbon footprint.

[0013] There is also a need to propose more sustainable (meth)acrylic and polymeric (meth)acrylic compositions.

[0014] There is also a need for methods of preparing (meth)acrylic composites with reduced carbon footprints.

[0015] Another object of the present invention is to propose a method for producing polymer (meth)acrylic composites that have a reduced carbon footprint, are recyclable and contain already recycled raw materials. [Background technology]

[0016] Document WO2013 / 056845 discloses composite materials obtained by in-situ polymerization of thermoplastic (meth)acrylic resins. It also describes polymer composite materials obtained by in-situ polymerization of thermoplastic (meth)acrylic resins with fibrous materials containing long fibers, their uses, a method for producing such composite materials, and manufactured mechanical or structural parts or articles containing the polymer composite materials. The document does not disclose anything about using recycled materials or reducing carbon footprints.

[0017] Document WO2014 / 013028 discloses a method for impregnating a fibrous substrate, a liquid (meth)acrylic syrup for the impregnation method, a polymerization method thereof, and a structural article obtained therefrom. The liquid (meth)acrylic syrup comprises a (meth)acrylic polymer, a (meth)acrylic monomer, and at least one initiator or initiation system for initiating the polymerization of the (meth)acrylic monomer. The document does not disclose anything about using recycled materials and reducing the carbon footprint.

[0018] Document CN110684470 discloses a method for preparing adhesive acrylates from monomer wastewater containing recovered acrylic acid.

[0019] Document US2021 / 087383 discloses biobased acrylic casting compositions that in particular comprise one or more mono- and polyfunctional acrylic and / or methacrylic biomonomers of plant or animal origin.

[0020] Document JP2000 / 319443 discloses a method for producing polymer syrup, which uses waste polymers.

[0021] Document CN114920489 discloses a cement raw powder additive, which is based on or contains butyl acrylate.

[0022] None of the cited prior art discloses a liquid (meth)acrylic syrup that has a recycled content of at least 1% by weight or that contains one type of recycled raw material or that reduces the carbon food print. Summary of the Invention

[0023] Surprisingly, (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight, (a1) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer; a liquid (meth)acrylic syrup containing (b) optionally 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (c) optionally between 100 ppm and 10,000 ppm of an accelerator; It has been found that the (meth)acrylic composition MC1 comprising makes it possible to provide (meth)acrylic polymer compositions and compositions for the preparation of (meth)acrylic composites that have the same properties as (meth)acrylic compositions and polymer (meth)acrylic compositions that do not use any recycled raw materials, while having a reduced carbon footprint.

[0024] Surprisingly, (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight, (a1) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer; a liquid (meth)acrylic syrup containing (b) 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (c) accelerators between 100 ppm and 10,000 ppm It has also been found that the (meth)acrylic composition MC1 comprising makes it possible to provide compositions for the preparation of (meth)acrylic polymer compositions MPC1 and (meth)acrylic polymer composites MPCM1, which have the same properties as (meth)acrylic compositions and polymer (meth)acrylic compositions that do not use any recycled raw materials, have a reduced carbon footprint, and polymerize into recyclable compositions once polymerized.

[0025] Surprisingly, (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight, (a1) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer; a liquid (meth)acrylic syrup containing (b) 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (c) accelerators between 100 ppm and 10,000 ppm It has also been found that the (meth)acrylic composition MC1 comprising makes it possible to provide compositions for the preparation of (meth)acrylic polymer compositions MPC1 and (meth)acrylic polymer composites MPCM1 that have the same properties as (meth)acrylic compositions and polymer (meth)acrylic compositions that do not use any recycled raw materials, while also having a reduced carbon food print.

[0026] Surprisingly, a method for preparing a (meth)acrylic composition MC1, comprising: (i) providing a (meth)acrylic polymer P1 and at least one (meth)acrylic monomer M1 having a 100% recycled content, (ii) 100 parts by weight of (a) a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight; (a1) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer; by mixing components (a1) and (a2), (iii) optionally providing 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (iv) optionally providing between 100 ppm and 10,000 ppm of an accelerator; It has been found that the process comprising the steps of: obtaining compositions for the preparation of (meth)acrylic polymer composition MPC1 and (meth)acrylic polymer composite MPCM1 having the same properties as (meth)acrylic compositions and polymer (meth)acrylic compositions without any recycled raw materials, while having a reduced carbon footprint.

[0027] According to a first aspect, the present invention relates to a (meth)acrylic composition MC1, which comprises: (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight, (a1) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer; a liquid (meth)acrylic syrup containing (b) optionally 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (c) optionally between 100 ppm and 10,000 ppm of an accelerator; Contains:

[0028] According to a second aspect, the present invention relates to a (meth)acrylic composition MC1, which comprises: (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight, (a1) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer; a liquid (meth)acrylic syrup containing (b) 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (c) accelerators between 100 ppm and 10,000 ppm Contains:

[0029] According to a third aspect, the present invention provides a method for producing a cellular membrane comprising: (i) providing a (meth)acrylic polymer P1 and at least one (meth)acrylic monomer M1 having a recycled content of at least 1% by weight, (ii) 100 parts by weight of (a) a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight; (a1) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer; by mixing components (a1) and (a2), (iii) optionally providing 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (iv) optionally providing between 100 ppm and 10,000 ppm of an accelerator; (v) Mixing the ingredients The present invention relates to a method for preparing a (meth)acrylic composition MC1, comprising:

[0030] According to a fourth aspect, the present invention provides a method for preparing a (meth)acrylic composition MC1, comprising: (i) 100 parts by weight of (a) a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight, (a1) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer; Providing a liquid (meth)acrylic syrup comprising: (ii) providing 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (iii) providing between 100 ppm and 10,000 ppm of accelerator; (iv) Mixing the ingredients The present invention relates to a method comprising:

[0031] According to a fifth aspect, the present invention relates to the use of a (meth)acrylic composition MC1 for preparing a (meth)acrylic polymer material MPC1 or a (meth)acrylic polymer composite material MPCM1, wherein said (meth)acrylic composition MC1 comprises: (a) 100 parts by weight of a liquid (meth)acrylic syrup, (a1) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer; a liquid (meth)acrylic syrup containing (b) 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (c) accelerators between 100 ppm and 10,000 ppm Regarding use, including

[0032] According to a sixth aspect, the present invention relates to a (meth)acrylic polymer material MPC1 or a (meth)acrylic polymer composite MPCM1 prepared by polymerization of a (meth)acrylic composition MC1.

[0033] According to a seventh aspect, the present invention provides a method for preparing a (meth)acrylic polymer material MPC1, comprising: (i) providing a (meth)acrylic composition MC1 according to the first or second aspect; (ii) Step of polymerizing the (meth)acrylic composition MC1 The present invention relates to a method comprising:

[0034] According to an eighth aspect, the present invention provides a method for preparing a (meth)acrylic polymer composite material MPCM1, comprising: (i) providing a (meth)acrylic composition MC1 according to the first or second aspect; (ii) contacting the (meth)acrylic composition MC1 with a reinforcement material; (iii) Step of polymerizing the (meth)acrylic composition MC1 The present invention relates to a method comprising:

[0035] According to a ninth aspect, the present invention provides a method for reducing the carbon food print of a (meth)acrylic composition MC1, comprising: (i) providing a (meth)acrylic polymer P1 and at least one (meth)acrylic monomer M1 having a recycled content of at least 1% by weight, (ii) 100 parts by weight of (a) a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight; (a1) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer; by mixing components (a1) and (a2), (iii) optionally providing 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (iv) optionally providing between 100 ppm and 10,000 ppm of an accelerator; (v) Mixing the ingredients The present invention relates to a method comprising:

[0036] According to a tenth aspect, the present invention provides a use of a (meth)acrylic composition MC1 for preparing a (meth)acrylic polymer material MPC1 or a (meth)acrylic polymer composite MPCM1 having reduced carbon food print, wherein said (meth)acrylic composition MC1 comprises: (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight, (a1) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer; a liquid (meth)acrylic syrup containing (b) 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (c) accelerators between 100 ppm and 10,000 ppm Regarding use, including

[0037] According to an eleventh aspect, the present invention provides a method for reducing the carbon footprint of a (meth)acrylic polymer material MPC1, comprising the steps of: (i) providing a (meth)acrylic composition MC1 according to the ninth aspect; (ii) Step of polymerizing the (meth)acrylic composition MC1 The present invention relates to a method comprising:

[0038] According to a twelfth aspect, the present invention provides a method for reducing the carbon food print of a (meth)acrylic polymer composite material MPCM1, comprising: (i) providing a (meth)acrylic composition MC1 according to the ninth aspect; (ii) contacting the (meth)acrylic composition MC1 with a reinforcement material; (iii) Step of polymerizing the (meth)acrylic composition MC1 The present invention relates to a method comprising:

[0039] According to a thirteenth aspect, the present invention relates to the use of a (meth)acrylic composition MC1 for reducing carbon prints, said (meth)acrylic composition MC1 comprising: (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight, (a1) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer; a liquid (meth)acrylic syrup containing (b) 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (c) accelerators between 100 ppm and 10,000 ppm Regarding use, including

[0040] The term "(meth)acrylic monomer" covers both acrylic and methacrylic monomers. Similarly, the term "(meth)acrylic polymer" covers not only acrylic homopolymers, but also methacrylic homopolymers, acrylic copolymers, and methacrylic copolymers.

[0041] The term "PMMA" as used refers to homopolymers and copolymers of methyl methacrylate (MMA), in which the weight ratio of MMA in the PMMA is at least 50% by weight.

[0042] The term "initiator" as used herein means a compound that initiates the polymerization of a monomer or a chemical species that forms an intermediate compound that can subsequently combine with multiple other monomers to form a polymeric compound.

[0043] As used herein, the term "polymer composite" refers to a multi-component material that includes a plurality of distinct phase domains, at least one of which is continuous and at least one of which is polymeric.

[0044] The term "thermoplastic" as used herein means a polymer that, when heated, turns into a liquid or becomes more liquid or less viscous and can assume a new shape with the application of heat and optionally pressure. This also applies to lightly crosslinked thermoplastic polymers that can be thermoformed when heated above their softening temperature.

[0045] The term "recycled" as used herein refers to polymers or monomers, or both, that are not virgin materials. The polymers can be obtained from manufacturing scrap or waste, more specifically polymer waste, while the monomers are recovered from thermochemical recycling of polymer waste. The polymer waste can be industrial or post-consumer. Post-consumer waste of a material is waste generated by customers of substrates containing that material. Industrial waste is waste generated during the manufacturing process of a product and not used in the consumer market.

[0046] As used, the term "recycled content" refers to the mass percentage of a material that is derived from recycled materials.

[0047] As used herein, the term "carbon footprint" means the weighted sum of greenhouse gas emissions and greenhouse gas removals of a process, process system, or product system, expressed in CO2 equivalents.

[0048] In the present invention, the range of x to y means that the upper and lower limits of this range are included, and is at least equal to x to y.

[0049] In the present invention, when a range is stated to be between x and y, it means that the upper and lower limits of the range are excluded, and is equivalent to being greater than x and less than y.

[0050] The liquid (meth)acrylic syrup (a) of the composition of the present invention comprises (a1) a (meth)acrylic polymer P1 and (a2) a (meth)acrylic monomer M1, and the liquid (meth)acrylic syrup has a recycled content of at least 1% by weight, the recycled content being derived from either the (meth)acrylic polymer P1 or the (meth)acrylic monomer M1, or both.

[0051] The liquid (meth)acrylic syrup (a) according to the (meth)acrylic composition MC1 of the present invention comprises between 1 and 50% by weight of the (meth)acrylic polymer P1 and between 50 and 99% by weight of the (meth)acrylic monomer M1.

[0052] Preferably, the liquid (meth)acrylic syrup (a) comprises between 2 and 50% by weight of the (meth)acrylic polymer P1 and between 50 and 98% by weight of the (meth)acrylic monomer M1, more preferably between 2 and 40% by weight of the (meth)acrylic polymer P1 and between 60 and 98% by weight of the (meth)acrylic monomer M1, even more preferably between 3 and 40% by weight of the (meth)acrylic polymer P1 and between 60 and 97% by weight of the (meth)acrylic monomer M1, advantageously between 3 and 35% by weight of the (meth)acrylic polymer P1 and between 65 and 97% by weight of the (meth)acrylic monomer M1, and even more advantageously between 3 and 30% by weight of the (meth)acrylic polymer P1 and between 70 and 97% by weight of the (meth)acrylic monomer M1.

[0053] The kinematic viscosity of the liquid (meth)acrylic syrup is in the range of 10 mPa·s to 10,000 mPa·s, preferably 20 mPa·s to 7,000 mPa·s, advantageously 20 mPa·s to 5,000 mPa·s, more advantageously 20 mPa·s to 2,000 mPa·s, and even more advantageously between 20 mPa·s and 1,000 mPa·s. The viscosity of the syrup can be easily measured with a rheometer or viscometer. The kinematic viscosity is measured at 25°C. If the liquid (meth)acrylic syrup has Newtonian behavior and is free of shear thinning, the kinematic viscosity is independent of the shear of the rheometer or the speed of the moving part of the viscometer. If the liquid composition has non-Newtonian behavior and shear thinning, the kinematic viscosity is in the range of 1 s at 25°C. -1 It is measured at a shear rate of .

[0054] Regarding the liquid (meth)acrylic syrup (a), it comprises (a1) a (meth)acrylic monomer M1 and (a2) a (meth)acrylic polymer P1. Once the (meth)acrylic composition MC1 is polymerized, the (meth)acrylic monomer M1 is finally polymerized with other (meth)acrylic monomers to be converted into a (meth)acrylic polymer P2 containing monomer units of the (meth)acrylic monomer M1 and other possible comonomers.

[0055] The liquid (meth)acrylic syrup of the (meth)acrylic composition MC1 according to the present invention may contain only one (meth)acrylic polymer P1, but may equally contain a mixture of two, three or more (meth)acrylic polymers P1. When a mixture of different (meth)acrylic polymers P1 is present, the difference lies in the composition of each (meth)acrylic polymer P1 or in the molecular weight of each (meth)acrylic polymer P1, or both.

[0056] The or each (meth)acrylic polymer P1 contained in the liquid (meth)acrylic syrup is in particular Polyalkyl acrylates, including alkyl acrylate homopolymers and alkyl acrylate copolymers; and Polyalkyl methacrylates, including alkyl methacrylate homopolymers and alkyl methacrylate copolymers can be selected from:

[0057] According to a preferred embodiment, the or each (meth)acrylic polymer P1 is polymethyl methacrylate (PMMA), although, as mentioned above, it is understood that polymethyl methacrylate (PMMA) may mean a methyl methacrylate (MMA) homopolymer or an MMA copolymer.

[0058] In particular, when the liquid (meth)acrylic syrup comprises a mixture of two or more polymethyl methacrylates P1, this mixture can be formed by mixing at least two MMA homopolymers with different molecular weights, by mixing at least two MMA copolymers with the same monomer composition but different molecular weights, by mixing at least two MMA copolymers with different monomer compositions, or by mixing at least one MMA homopolymer with at least one MMA copolymer.

[0059] According to a first preferred embodiment, the (meth)acrylic polymer P1 is chosen from methyl methacrylate homopolymers, methyl methacrylate copolymers, or mixtures thereof, methyl methacrylate advantageously representing at least 50% by weight of the or each (meth)acrylic polymer P1.

[0060] According to one embodiment of the invention, methyl methacrylate represents at least 55% by weight of the or each (meth)acrylic polymer P1.

[0061] According to another particular embodiment, the or each (meth)acrylic polymer P1 comprises at least 70% by weight, advantageously at least 80% by weight, preferentially at least 90% by weight and more preferentially at least 95% by weight of methyl methacrylate.

[0062] When the or each (meth)acrylic polymer P1 is a methyl methacrylate (MMA) copolymer, it may contain at least one comonomer containing at least one ethylenic unsaturation and copolymerizable with methyl methacrylate. These comonomers include, in particular, acrylic acid and methacrylic acid, as well as alkyl (meth)acrylates in which the alkyl group contains 1 to 12 carbon atoms. By alkyl (meth)acrylate is meant the alkyl esters of acrylic acid or methacrylic acid. Examples of comonomers include methyl acrylate and ethyl, butyl, or 2-ethylhexyl (meth)acrylate.

[0063] Advantageously, the or each (meth)acrylic polymer P1 is a homopolymer of methyl methacrylate or a copolymer of methyl methacrylate with an alkyl acrylate or alkyl methacrylate, the alkyl group containing from 1 to 12 carbon atoms, advantageously from 1 to 6 carbon atoms and preferentially from 1 to 4 carbon atoms.

[0064] According to a first preferred embodiment, when the or each (meth)acrylic polymer P1 is a methyl methacrylate (MMA) copolymer, this methyl methacrylate (MMA) copolymer comprises 70% to 99.9% by weight, advantageously 80% to 99.9% by weight, preferentially 90% to 99.9% by weight, more preferentially 95% to 99.9% by weight of methyl methacrylate and 0.1% to 30% by weight, advantageously 0.1% to 20% by weight, preferentially 0.1% to 10% by weight, more preferentially 0.1% to 5% by weight of at least one comonomer containing at least one ethylenic unsaturation copolymerizable with methyl methacrylate. Preferably, the or each comonomer is chosen from methyl acrylate and ethyl acrylate.

[0065] In an advantageous variant of the first preferred embodiment, when the or each (meth)acrylic polymer P1 is a methyl methacrylate (MMA) copolymer, the (meth)acrylic polymer P1 is a copolymer of methyl methacrylate and an alkyl acrylate.

[0066] In a preferred variant of the first preferred embodiment, when the or each (meth)acrylic polymer P1 is a methyl methacrylate (MMA) copolymer, the (meth)acrylic polymer P1 is a copolymer of methyl methacrylate and methyl acrylate or ethyl acrylate.

[0067] According to a second preferred embodiment, when the or each (meth)acrylic polymer P1 is a methyl methacrylate (MMA) copolymer, this methyl methacrylate (MMA) copolymer comprises 50% to 99.9% by weight, advantageously 52% to 99.9% by weight, preferentially 53% to 99.9% by weight, and more preferentially 55% to 99.9% by weight of methyl methacrylate and 0.1% to 50% by weight, advantageously 0.1% to 48% by weight, preferentially 0.1% to 47% by weight, and more preferentially 0.1% to 45% by weight of at least one comonomer containing at least one ethylenic unsaturation copolymerizable with methyl methacrylate. Preferably, the or each comonomer is chosen from methyl acrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, butyl acrylate or butyl methacrylate.

[0068] M of the or each (meth)acrylic polymer P1 w The weight average molecular weight, denoted as , is generally high and may therefore exceed 40,000 g / mol, advantageously exceed 45,000 g / mol and preferentially exceed 50,000 g / mol. The weight average molecular weight may be determined by size exclusion chromatography (SEC).

[0069] The (meth)acrylic polymer P1, when not crosslinked, typically has a melt mass-flow rate (MFR) ISO 1133-2:2011 (230°C / 3.8 kg) between 0.1 g / 10 min and 20 g / 10 min, or the melt mass-flow rate is between 0.2 g / 10 min and 18 g / 10 min, or between 0.3 g / 10 min and 16 g / 10 min, or between 0.4 g / 10 min and 13 g / 10 min.

[0070] The liquid (meth)acrylic syrup of the (meth)acrylic composition MC1 according to the present invention may contain only one (meth)acrylic monomer M1, but may equally contain a mixture of two, three or more (meth)acrylic monomers M1, such as (meth)acrylic monomer M1a, (meth)acrylic monomer M1b, (meth)acrylic monomer M1c, etc.

[0071] Regardless of whether the liquid (meth)acrylic syrup comprises one or more (meth)acrylic monomers M1, the or each (meth)acrylic monomer M1 comprises only one (meth)acrylic functional group per monomer.

[0072] With regard to the (meth)acrylic monomer M1, the monomer is selected from alkyl acrylic monomers, alkyl methacrylic monomers, hydroxyalkyl acrylic monomers and hydroxyalkyl methacrylic monomers, and mixtures thereof. By alkyl acrylic or alkyl methacrylic monomers is meant alkyl esters of acrylic or methacrylic acid.

[0073] Preferably, the (meth)acrylic monomer M1 is selected from hydroxyalkyl acrylic monomers, hydroxyalkyl methacrylic monomers, alkyl acrylic monomers, alkyl methacrylic monomers and mixtures thereof, wherein the alkyl group contains 1 to 22 linear, branched or cyclic carbons; the alkyl group preferably contains 1 to 12 linear, branched or cyclic carbons.

[0074] Advantageously, the (meth)acrylic monomer M1 is chosen from methyl methacrylate, ethyl methacrylate, methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, n-butyl methacrylate, isobutyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, isobornyl acrylate, isobornyl methacrylate, hydroxyethyl acrylate and hydroxyethyl methacrylate, and mixtures thereof.

[0075] According to a preferred embodiment, at least 50% by weight, preferably at least 60% by weight, of the (meth)acrylic monomers M1 is methyl methacrylate.

[0076] According to a first more preferred embodiment, at least 50% by weight, preferably at least 60% by weight, more preferably at least 70% by weight, advantageously at least 80% by weight and even more advantageously 90% by weight of the monomers M1 is a mixture of methyl methacrylate and optionally at least one other monomer.

[0077] According to a second more preferred embodiment, the monomer M1 is methyl methacrylate.

[0078] In a first variant of the invention, the liquid (meth)acrylic syrup comprises: (a1) 3% to 45% by weight, preferentially 3% to 40% by weight, of a (meth)acrylic polymer P1, (a2) 55% to 97% by weight, preferentially 60% to 97% by weight, of a (meth)acrylic monomer M1 Includes:

[0079] In a second variant of the invention, the liquid (meth)acrylic syrup comprises: (a1) 10% to 35% by weight, preferentially 12% to 35% by weight, more preferentially 15% to 30% by weight, even more preferentially 20% to 30% by weight of a (meth)acrylic polymer P1, (a2) 65% to 90% by weight, preferentially 65% ​​to 88% by weight, more preferentially 70% to 85% by weight, even more preferentially 70% to 80% by weight of a (meth)acrylic monomer M1 Includes:

[0080] In an advantageous variant, the or each (meth)acrylic polymer P1 and the or each (meth)acrylic monomer M1 of the liquid (meth)acrylic syrup comprise at least one identical (meth)acrylic unit, such a variant making it possible to optimize the solubility of the (meth)acrylic polymer P1 in the (meth)acrylic monomer M1.

[0081] Preferentially, the or each (meth)acrylic polymer P1 is chosen from homopolymers of methyl methacrylate, copolymers of methyl methacrylate and methyl acrylate, and copolymers of methyl methacrylate and ethyl acrylate, or copolymers of methyl methacrylate and butyl acrylate, or copolymers of methyl methacrylate and butyl methacrylate, each comonomer being present in the copolymer in an amount of up to 45% by weight.

[0082] Preferentially, the (meth)acrylic monomer M1 is methyl methacrylate.

[0083] In a first advantageous variant, the liquid (meth)acrylic syrup comprises a (meth)acrylic polymer P1 rather than a mixture of (meth)acrylic polymers P1.

[0084] In a second advantageous variant, the liquid (meth)acrylic syrup comprises a mixture of two (meth)acrylic polymers P1.

[0085] In another advantageous variant, the liquid (meth)acrylic syrup comprises (meth)acrylic monomers M1 rather than a mixture of (meth)acrylic monomers M1.

[0086] In the liquid (meth)acrylic syrup, stabilizers or reaction inhibitors may also be present to prevent spontaneous polymerization of the (meth)acrylic monomers M1.

[0087] These stabilizers may be chosen in particular from hydroquinone (HQ), hydroquinone monomethyl ether (HQME), 2,6-di-tert-butyl-4-methylphenol (BHT), 2,6-di-tert-butyl-4-methoxyphenol (Topanol O), and 2,4-dimethyl-6-tert-butylphenol (Topanol A).

[0088] These stabilizers may be present in the liquid (meth)acrylic syrup in a proportion of up to 5 parts by weight, advantageously up to 4 parts by weight, and preferentially between 0.3 and 3 parts by weight, relative to 100 parts by weight of the total of (meth)acrylic polymer P1 and (meth)acrylic monomer M1.

[0089] Regarding the recycled content of at least 1 wt. %, it can be derived from either (meth)acrylic polymer P1 or (meth)acrylic monomer M1, or both, and the recycled content is expressed based on the sum of components (a1) and (a2) of the liquid (meth)acrylic syrup.

[0090] In a first preferred embodiment, the recycled content is at least 10% by weight.

[0091] In a second preferred embodiment, the recycled content is at least 20% by weight.

[0092] In a third preferred embodiment, the recycled content is at least 50% by weight.

[0093] In a fourth preferred embodiment, the recycled content is between 15% and 100% by weight.

[0094] In a fifth preferred embodiment, the recycled content is between 20% and 100% by weight.

[0095] In a sixth preferred embodiment, the recycled content is between 50% and 100% by weight.

[0096] In a seventh preferred embodiment, the recycled content is 100% by weight.

[0097] In an eighth preferred embodiment, the recycled content of the liquid (meth)acrylic syrup comes exclusively from the (meth)acrylic polymer P1.

[0098] In a ninth preferred embodiment, the recycled content of the liquid (meth)acrylic syrup comes exclusively from (meth)acrylic monomers M1.

[0099] In a tenth preferred embodiment, the recycled content of the liquid (meth)acrylic syrup comes from (meth)acrylic polymer P1 and (meth)acrylic monomer M1.

[0100] In an eleventh preferred embodiment, the (meth)acrylic polymer P1 of component (a1) of the liquid (meth)acrylic syrup is only partially recycled, which means that between 1% and 50% by weight of the (meth)acrylic polymer(s) P1 is / are a mixture of at least two (meth)acrylic polymers P1, one of which is recycled and the other of which is not.

[0101] In a twelfth embodiment, the (meth)acrylic monomers M1 of component (a2) of the liquid (meth)acrylic syrup are only partially recycled, meaning that between 50% and 99% by weight of the one or more (meth)acrylic monomers M1 there is a mixture of at least two (meth)acrylic monomers M1, one of which is recycled and the other of which is not recycled.

[0102] The preferred embodiments of each can be combined in any logical combination.

[0103] The (meth)acrylic polymer P1 as a recycled component originates from waste, preferably industrial or post-consumer waste.

[0104] The (meth)acrylic monomer M1 as a recycled component is derived from the depolymerization of a (meth)acrylic polymer containing the (meth)acrylic monomer M1. When the monomer (M1) is methyl methacrylate, it is obtained by depolymerization of polymethyl methacrylate (PMMA).

[0105] The (meth)acrylic composition MC1 according to one embodiment of the present invention also comprises a polymerization initiator whose function is to ensure the initiation of the polymerization of the (meth)acrylic monomer M1.

[0106] The polymerization initiator may be selected from organic peroxides, peroxyesters, peroxyacetals and azo compounds.

[0107] The polymerization initiator may be chosen in particular from diacyl peroxides, peroxyesters, peroxydicarbonates, dialkyl peroxides, peroxyacetals, hydroperoxides or peroxyketals.

[0108] In one embodiment, the polymerization initiator is selected from benzoyl peroxide.

[0109] In another embodiment, the polymerization initiator is selected from the group consisting of diisobutyryl peroxide, cumyl peroxyneodecanoate, di(3-methoxybutyl)peroxydicarbonate, 1,1,3,3-tetramethylbutylperoxyneodecanoate, cumyl peroxyneoheptanoate, di-n-propyl peroxydicarbonate, tert-amyl peroxyneodecanoate, di-sec-butyl peroxydicarbonate, diisopropyl peroxydicarbonate, di(4-tert-butylcyclohexyl)peroxydicarbonate, di-(2-ethylhexyl)peroxydicarbonate, peroxydicarbonate, tert-amyl peroxyneodecanoate, tert-butyl peroxyneodecanoate, di-n-butyl peroxydicarbonate, dicetyl peroxydicarbonate, dimyristyl peroxydicarbonate, 1,1,3,3-tetramethylbutyl peroxypivalate, tert-butyl peroxyneoheptanoate, tert-amyl peroxypivalate, tert-butyl peroxypivalate, di-(3,5,5-trimethylhexanoyl)-peroxide, dilauroyl peroxide, dide peroxymethyl 2,5-dimethyl-2,5-di(2-ethylhexanoylperoxy)hexane, 1,1,3,3-tetramethylbutylperoxy-2-ethylhexanoate, tert-amylperoxy-2-ethylhexanoate, dibenzoyl peroxide, tert-butylperoxy-2-ethylhexanoate, tert-butylperoxydiethyl acetate, tert-butylperoxyisobutyrate, 1,1-di-(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 1,1-di(tert-amylperoxy)hexane peroxy)cyclohexane, 1,1-di-(tert-butylperoxy)-cyclohexane, tert-amylperoxy-2-ethylhexyl carbonate, tert-amyl peroxyacetate, tert-butylperoxy-3,5,5-trimethylhexanoate, 2,2-di-(tert-butylperoxy)-butane, tert-butylperoxyisopropyl carbonate, tert-butylperoxy-2-ethylhexyl carbonate, tert-amyl peroxybenzoate, tert-butyl peroxyacetate, 4,4-Di(tert-butylperoxy)butyl valerate, tert-butylperoxybenzoate, di-tert-amyl peroxide, dicumyl peroxide, di-(2-tert-butyl-peroxyisopropyl)-benzene, 2,5-dimethyl-2,5-di-(tert-butylperoxy)-hexane, tert-butylcumyl peroxide, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexyne-3, di- tert-butyl peroxide, 3,6,9-triethyl-3,6,9-trimethyl-1,4,7-triperoxonane, 2,2'-azobisisobutyronitrile (AIBN), 2,2'-azodi-(2-methylbutyronitrile), azobisisobutyramide, 2,2'-azobis(2,4-dimethylvaleronitrile), 1,1'-azodi(hexahydrobenzonitrile), or 4,4'-azobis(4-cyanopentanoic acid).

[0110] The (meth)acrylic composition MC1 according to the present invention may contain 0.01 to 5 parts by weight of a polymerization initiator.

[0111] According to a particular embodiment, the (meth)acrylic composition MC1 according to the invention comprises 0.02 to 4 parts by weight, advantageously 0.03 to 3 parts by weight, of a polymerization initiator per 100 parts by weight of the liquid (meth)acrylic syrup.

[0112] What has just been said about polymerization initiators is also fully applicable to initiator systems, such as systems consisting of a polymerization initiator and a polymerization activator or accelerator.

[0113] The (meth)acrylic composition MC1 according to the invention may, according to certain embodiments, still further advantageously comprise a polymerization activator or accelerator.

[0114] According to a particular embodiment, the (meth)acrylic composition according to the invention comprises between 100 ppm and 10,000 ppm, advantageously between 100 ppm and 7,000 ppm, preferably between 200 ppm and 5,000 ppm of polymerization activator or accelerator per 100 parts by weight of (meth)acrylic syrup.

[0115] The present invention also relates to a method for preparing the (meth)acrylic composition MC1.

[0116] According to the present invention, the method comprises the steps of providing each component and iv) mixing the components.

[0117] Step iv) of the preparation method according to the present invention is carried out by mixing all of the components contained in the (meth)acrylic composition MC1. In one embodiment, care is taken to first prepare a liquid (meth)acrylic syrup, then optionally add a polymerization activator or accelerator to the (meth)acrylic syrup, and finally add a polymerization initiator.

[0118] This mixing may be done manually or may be carried out using a mixing device.

[0119] Optionally, mixing is carried out by stirring for between 1 minute and 36 hours, advantageously between 2 minutes and 24 hours, more advantageously between 3 minutes and 24 hours, preferentially between 4 minutes and 24 hours.

[0120] The process according to the invention is therefore particularly simple to carry out and is a process that can easily be carried out in existing equipment dedicated to the production of (meth)acrylic compositions.

[0121] The (meth)acrylic composition MC1 containing the compounds a1) to a2) or other components optionally added has a viscosity of between 10 mPa·s and 10000 mPa·s at 23°C.

[0122] Preferably, the viscosity at 23°C of the (meth)acrylic composition MC1 comprising the compounds a1) to a2) is in the range of 50 mPa·s to 10000 mPa·s, more preferably 50 mPa·s to 9000 mPa·s, even more preferably 50 mPa·s to 8000 mPa·s, even more preferably 50 mPa·s to 7500 mPa·s, even more preferably between 50 mPa·s and 7000 mPa·s, advantageously between 50 mPa·s and 6000 mPa·s, and more advantageously between 50 mPa·s and 5000 mPa·s.

[0123] The method for preparing the (meth)acrylic composition MC1 according to any embodiment can optionally further include a filtration step of the liquid (meth)acrylic syrup having a recycle content of at least 1 wt. %, which is preferably carried out before mixing with the polymerization initiator.

[0124] In one embodiment, the reinforcement material is a fibrous substrate.

[0125] In another embodiment, the reinforcing material is an inorganic filler.

[0126] In a further aspect, the present invention relates to a molded part MP1 comprising a (meth)acrylic polymer composite MPCM1.

[0127] In a first preferred embodiment, the (meth)acrylic polymer composite MPCM1 is a fiber-reinforced (meth)acrylic polymer composite.

[0128] In a second preferred embodiment, the (meth)acrylic polymer composite MPCM1 is a particle-reinforced (meth)acrylic polymer composite.

[0129] [method] The weight-average molecular weight can be measured by size exclusion chromatography (SEC). The chromatography column is calibrated with PMMA standards having molecular weights between 402 g / mol and 1,900,000 g / mol. The average molecular weight is expressed in g / mol for the number molecular weight Mn and the average molecular weight Mw, respectively. The concentration at the time of measurement is 1 g / L.

[0130] The viscosity of the (meth)acrylic composition containing at least components a1) and a2) is measured at 23°C using a Brookfield viscometer in accordance with ISO2555:2018 standard (Plastics - Resins in the liquid state or in emulsion or dispersion - Determination of apparent viscosity by the single-cylinder rotational viscometer method).

[0131] Stability is measured in the following way: Preheat oven to 90°C. Fill bottles with 200g of liquid resin. Place the sealed bottles in the oven. Check the samples periodically. A thermocouple can be used to track the temperature of the sample during the stability test. If the resin remains liquid after 24 hours at 90°C and no exothermic peak is observed during this time, the sample is considered "compliant", i.e. stable. Remaining liquid means that the viscosity does not exceed 20 Pa·s at 23°C.

[0132] Reactivity is measured as follows: A 20 x 180 mm test tube is filled with liquid syrup to a height of 7.5 cm and an initiator and accelerator are added. A thermocouple is placed in the syrup. The test tube is immersed at least 140 mm into a 25°C water bath. The temperature is measured continuously and the time to the temperature peak is measured. [Example]

[0133] The compounds used in the preparation of the various (meth)acrylic compositions are as follows: - PMMA formed from a copolymer of methyl methacrylate and ethyl acrylate, manufactured by the company Altuglas under the name Altuglas® BS 520B (abbreviation P1-F), as the (meth)acrylic polymer P1; - as recycled (meth)acrylic polymer P1, production scrap PMMA with the same molecular weight as BS 520B (measured by size exclusion chromatography (SEC), abbreviated as P1-R) was used, - methyl methacrylate stabilized with hydroquinone monomethyl ether (abbreviated as M1-F) as the (meth)acrylic monomer M1, - Methyl methacrylate (abbreviated as M1-R) manufactured by Monomeros del Valles is used as the recycled (meth)acrylic monomer M1. - Benzoyl peroxide (BPO) is used as an initiator. - DMPT (N,N-dimethyl-p-toluidine) is used as an accelerator.

[0134] According to Table 1, four syrups are first prepared by dissolving 20 parts by weight of the respective (meth)acrylic polymer P1 in 80 parts by weight of the respective (meth)acrylic monomer M1.

[0135] Table 1 - Composition of each liquid (meth)acrylic syrup sample TIFF2025539456000001.tif63170

[0136] The properties of the four sample syrups are shown in Table 2.

[0137] Table 2 - Properties of liquid (meth)acrylic syrup TIFF2025539456000002.tif43170

[0138] As can be seen from Table 2, the three samples with recycled content have properties similar to the comparison sample using fossil-based (meth)acrylic polymer P1 and (meth)acrylic monomer M1.

[0139] To each sample, an initiator and accelerator are added: 3 parts BPO and 4000 ppm DMPT.

[0140] The four sample syrups are polymerized to prepare (meth)acrylic polymer compositions using a cast sheet method.

[0141] Table 3 - Properties of (meth)acrylic polymer compositions obtained from polymerized liquid (meth)acrylic syrup TIFF2025539456000003.tif93170

[0142] The four samples were injected into a fibrous substrate and polymerized after injection. The fibrous substrate accounted for 50% by volume of the resulting (meth)acrylic polymer composite material. The fibrous substrate was 600 g / m 2 Uses non-crimp glass fiber (NCF - non-crimp fabric).

[0143] The resulting polymer (meth)acrylic composite was analyzed for mechanical properties.

[0144] The first series of measurements was carried out at angles of ±45° to the fibre direction and the results are summarised in Table 4.

[0145] A second series of measurements was carried out at an angle of 0° / 90° to the fibre direction. The results obtained are summarised in Table 5.

[0146] Table 4 - Properties of (meth)acrylic polymer composites obtained from polymerized liquid (meth)acrylic syrup after injection at an angle of ±45° TIFF2025539456000004.tif37170

[0147] Table 5 - Properties of (meth)acrylic polymer composites obtained from polymerized liquid (meth)acrylic syrup after injection at angles 0° / 90° TIFF2025539456000005.tif53170

[0148] Tables 4 and 5 show that there is no significant change in any of the mechanical properties of the composites.

Claims

1. (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight, (a １ ) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a ２ ) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer a liquid (meth)acrylic syrup containing (b) optionally 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (c) optionally between 100 ppm and 10,000 ppm of an accelerator The (meth)acrylic composition MC1 comprises:

2. Liquid (meth)acrylic syrup (a １ ) from 10% to 35% by weight, preferentially from 12% to 35% by weight, more preferentially from 15% to 30% by weight, and even more preferentially from 20% to 30% by weight of a (meth)acrylic polymer P1, and (a ２ ) 65% to 90% by weight, preferentially 65% ​​to 88% by weight, more preferentially 70% to 85% by weight, even more preferentially 70% to 80% by weight of (meth)acrylic monomers M1 The (meth)acrylic composition MC1 according to claim 1, characterized in that it comprises:

3. (c) 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (d) between 100 ppm and 10,000 ppm of accelerator The (meth)acrylic composition MC1 according to claim 1 or 2, characterized in that it comprises:

4. 4. (Meth)acrylic composition MC1 according to claim 1, 2 or 3, characterized in that it has a recycled content of at least 10% by weight.

5. 4. (Meth)acrylic composition MC1 according to claim 1, 2 or 3, characterized in that the recycled content is between 15% and 100% by weight.

6. 4. The (meth)acrylic composition MC1 according to claim 1, 2 or 3, characterized in that the recycled content is from 20% to 100% by weight.

7. 4. The (meth)acrylic composition MC1 according to claim 1, 2 or 3, characterized in that the recycled content is 50% to 100% by weight.

8. 8. The composition according to claim 1, wherein at least 1% by weight of recycled content comes from either the (meth)acrylic polymer P1 or the (meth)acrylic monomer M1 or both.

9. 8. The composition according to claim 1, wherein the (meth)acrylic monomer M1 as recycled component is derived from the depolymerization of a (meth)acrylic polymer comprising the (meth)acrylic monomer M1.

10. 8. Composition according to any one of claims 1 to 7, characterized in that the (meth)acrylic polymer P1 as recycled component is derived from waste, preferably industrial or post-consumer waste.

11. 11. A composition according to any one of claims 1 to 10, characterized in that the or each (meth)acrylic polymer P1 is chosen from methyl methacrylate homopolymers, methyl methacrylate copolymers, or mixtures thereof, methyl methacrylate advantageously representing at least 50% by weight of the or each (meth)acrylic polymer P1.

12. 11. A composition according to any one of claims 1 to 10, characterized in that the or each (meth)acrylic polymer P1 comprises at least 70% by weight, advantageously at least 80% by weight, preferentially at least 90% by weight and more preferentially at least 95% by weight of methyl methacrylate.

13. 13. The composition according to claim 1, wherein the liquid (meth)acrylic syrup has a viscosity of between 10 mPa.s and 10,000 mPa.s at 25°C.

14. 14. Composition according to any one of claims 1 to 13, characterized in that at least 50% by weight, preferably at least 60% by weight, of the (meth)acrylic monomer(s) M1 are chosen from methyl methacrylate.

15. 14. Composition according to any one of claims 1 to 13, characterized in that at least 70% by weight, advantageously at least 80% by weight and even more advantageously 90% by weight of the monomers M1 are a mixture of methyl methacrylate and optionally at least one other monomer.

16. 14. Composition according to any one of claims 1 to 13, characterized in that the monomer M1 is methyl methacrylate.

17. The weight average molecular weight M of the or each (meth)acrylic polymer P1 ｗ 17. Composition according to any one of claims 1 to 16, characterized in that it has a molecular weight of more than 40,000 g / mol, advantageously more than 45,000 g / mol and preferentially more than 50,000 g / mol.

18. 18. The composition according to claim 1, wherein the (meth)acrylic polymer P1 has a melt mass-flow rate (MFR) ISO 1133-2:2011 (230°C / 3.8 kg) between 0.1 g / 10 min and 20 g / 10 min, or a melt mass-flow rate between 0.2 g / 10 min and 18 g / 10 min, or between 0.3 g / 10 min and 16 g / 10 min, or between 0.4 g / 10 min and 13 g / 10 min.

19. (i) providing a (meth)acrylic polymer P1 and at least one (meth)acrylic monomer M1 having a 100% recycled content, (ii) 100 parts by weight of (a) a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight, (a １ ) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a ２ ) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer A liquid (meth)acrylic syrup containing component (a １ ) and (a ２ ) by mixing the (iii) optionally providing 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (iv) optionally providing between 100 ppm and 10,000 ppm of an accelerator; (v) Mixing the ingredients 19. A method for preparing the (meth)acrylic composition MC1 according to claim 1, comprising:

20. (i) 100 parts by weight of (a) a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight; (a １ ) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a ２ ) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer providing a liquid (meth)acrylic syrup comprising (ii) providing 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (iii) providing between 100 ppm and 10,000 ppm of an accelerator; (iv) Mixing the ingredients 19. A method for preparing the (meth)acrylic composition MC1 according to claim 1, comprising:

21. 21. The method according to claim 19 or 20, characterized in that it additionally comprises a step of filtering the liquid (meth)acrylic syrup having a recycle content of at least 1% by weight.

22. A method for reducing the carbon food print of a (meth)acrylic composition MC1, comprising: (i) providing a (meth)acrylic polymer P1 and at least one (meth)acrylic monomer M1 having a recycled content of at least 1 wt. %, (ii) 100 parts by weight of (a) a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight, (a １ ) 1% to 50% by weight of one or more (meth)acrylic polymers P1, and (a ２ ) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 containing only one (meth)acrylic functional group per monomer A liquid (meth)acrylic syrup containing component (a １ ) and (a ２ ) by mixing the (iii) optionally providing 0.01 parts by weight to 5 parts by weight of a polymerization initiator; (iv) optionally providing between 100 ppm and 10,000 ppm of an accelerator; (v) Mixing the ingredients A method comprising:

23. Use of the (meth)acrylic composition MC1 according to any one of claims 1 to 18 for preparing a (meth)acrylic polymer material or a (meth)acrylic polymer composite material.

24. 19. Use of the (meth)acrylic composition MC1 according to any one of claims 1 to 18 for reducing carbon print.

25. A (meth)acrylic polymer material prepared by polymerization of the (meth)acrylic composition MC1 according to any one of claims 1 to 18.

26. Use of a (meth)acrylic composition MC1 according to any one of claims 1 to 18 for preparing a (meth)acrylic polymer material MPC1 or a (meth)acrylic polymer composite material MPCM1 having reduced carbon food print.

27. A (meth)acrylic polymer composite prepared by polymerization of the (meth)acrylic composition MC1 according to any one of claims 1 to 18.

28. (i) providing a (meth)acrylic composition MC1 according to any one of claims 1 to 18, (ii) A step of polymerizing the (meth)acrylic composition MC1 1. A method for preparing a (meth)acrylic polymer material, comprising:

29. (i) providing a (meth)acrylic composition MC1 according to any one of claims 1 to 18, (ii) A step of polymerizing the (meth)acrylic composition MC1 10. A method for reducing the carbon food print of a (meth)acrylic polymer material, comprising:

30. (i) providing a (meth)acrylic composition MC1 according to any one of claims 1 to 18, (ii) contacting the (meth)acrylic composition MC1 with a reinforcing material; (iii) A step of polymerizing the (meth)acrylic composition MC1 A method for preparing a (meth)acrylic polymer composite material MCPM1, comprising:

31. 1. A method for reducing the carbon food print of a (meth)acrylic polymer composite material MPCM1, comprising: (i) providing a (meth)acrylic composition MC1 according to any one of claims 1 to 18, (ii) contacting the (meth)acrylic composition MC1 with a reinforcing material; (iii) A step of polymerizing the (meth)acrylic composition MC1 A method comprising:

32. 32. The method of claim 30 or 31, wherein the reinforcement is a fibrous substrate.

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