264 results about "Oligoester" patented technology

One aspect is a method for producing a first intermediate product. A feedstock is provided that comprises a first polyester. The first polyester is contacted with a further organic compound in a volume section V3 to obtain a further initial mixture. A weight average molar mass of the first polyester is reduced in the volume section V3 to obtain a first intermediate mixture. The first intermediate mixture comprisesa first intermediate product and;the further organic compound.First particulated material is added to the first intermediate mixture in a volume section V4. A temperature of the first intermediate mixture in the volume section V4 is in the range of 160° C. to 230° C.

The present invention provides a polyphenylene sulfide resin and a method for preparing the same, the polyphenylene sulfide resin being obtained by measurement based on gel permeation chromatography using polystyrene as a conversion reference, in a differential molecular weight distribution curve using the logarithm value ln (M) of the molecular weight M as the horizontal axis and dw / dln (M) obtained by differentiating the concentration percentage w by the logarithm value ln (M) of the molecular weight as the vertical axis, the ratio of the value obtained by integrating dw / dln (M) at 6.90 < = ln (M) < = 9.21 with respect to the value obtained by integrating dw / dln (M) over the entire range of ln (M) is less than 5%. The preparation method of the polyphenylene sulfide resin is characterized in that a sulfur source, an alkali metal hydroxide and a dihalo aromatic compound are used as raw materials and subjected to a polymerization reaction in an organic polar solvent, and when the conversion rate of the dihalo aromatic compound is larger than 50%, materials passing through an external circulation pipeline are in a turbulent flow state so as to strengthen the mixing effect of a polymerization system; the polyphenylene sulfide resin can be prepared with high yield by inhibiting the generation of oligomer ultrafine powder waste. The method provided by the invention can significantly reduce the generation amount of oligomer ultra-micro powdery waste in the polyphenylene sulfide polymerization process.

The invention relates to the technical field of paint spraying, and particularly discloses a mosaic gold aerosol paint and a preparation method thereof. The painted gold aerosol paint comprises the following raw materials in percentage by mass: 30-40% of acrylic resin, 20-30% of a solvent, 5-15% of painted gold powder, 0.5-1% of a dispersing agent, 30-40% of a propellant and 0.5-2% of other auxiliaries. The dispersing agent comprises a star-shaped PEG polymer, an alkyl diphosphonic acid compound and macrocyclic oligoester. The mosaic gold aerosol paint has the advantages of being capable of being stored for a long time and not prone to oxidation and layering, can present colorful metallic paint after being coated and has different metallic color effects at different angles, and the appearance aesthetic feeling of a coated object is remarkably improved.

Disclosed in the present invention are a branched-chain-containing long-carbon-chain polyester elastomer based on biomass-based 2,5-furandicarboxylic acid, and a preparation method therefor. Monomers for preparing the polyester elastomer comprise 2,5-furandicarboxylic acid or 2,5-furandicarboxylic acid ester, a dihydric alcohol and a branched-chain-containing long-carbon-chain dibasic acid. The preparation method comprises: (1) performing a melting reaction on furandicarboxylic acid or an ester thereof, a branched-chain-containing long-carbon-chain dibasic acid and a dihydric alcohol to prepare an oligomer; and (2) performing melt polycondensation on the oligomer to synthesize a furandicarboxylic acid-based branched-chain-containing long-carbon-chain polyester elastomer. By means of the branched-chain-containing long-carbon-chain polyester elastomer of the present invention, the molecular structure can be effectively designed, and the molecular weight can be regulated, thereby optimizing mechanical properties, thermal properties, barrier properties, etc. The preparation process thereof is simple, convenient and safe, and the equipment requirements and catalysis cost are relatively low. The raw material 2,5-furandicarboxylic acid used in the present invention is a potential substitute for terephthalic acid, is derived from biomass, has a wide range of sources and is environmentally friendly.

The utility model relates to an air suction structure for TDO of a PET film, which comprises an air suction shell, an air inlet pipe connected with a TDO air port is formed on the air suction shell, the air suction shell is connected with an air duct assembly, the air duct assembly comprises an air duct shell connected with the air suction shell and an air duct pipe connected with the air duct shell, and the air duct pipe is connected with the air duct shell. A first air pipe and a second air pipe are arranged on the two sides of an air outlet of the air duct pipe, a flow meter is arranged in the air suction shell and connected with a controller, the controller is used for receiving wind power measured by the flow meter, and an opening and closing assembly communicated with the air duct shell and the air suction shell is arranged outside the air duct shell. In the film production process, oligomer can be generated, and the surface quality of the film is influenced, but the air suction system is additionally arranged at the TDO air port to suck the oligomer on the surface of the film, so that the cleanliness of the surface of the film is improved, the product quality is improved, and further processing of subsequent products is facilitated.

The invention relates to the technical field of plastic processing aids, and particularly discloses a pearlescent color master batch for PET bottle blowing and a preparation method of the pearlescent color master batch. The pearlescent color master batch for PET bottle blowing comprises the following raw materials in percentage by mass: 65-75% of PET carrier resin, 2-8% of a composite dispersant, 1-2% of a lubricant, 15-25% of an organic pigment and 6-10% of a pearlescent pigment, the composite dispersant comprises the following raw materials: macrocyclic oligoester, a hyperbranched polymer and an ionic liquid. When the pearlescent color master batch for the PET blown bottle is applied to preparation of the PET blown bottle, uniform dispersion can be achieved, the glossiness and the pearlescent effect of the PET blown bottle are remarkably improved, the uniformity and consistency of the appearance of a product are kept, and the PET blown bottle is endowed with unique metal texture.

A high-reliability fast-curing UV adhesive for outer layer protection of a power battery, a preparation method therefor, and a use thereof. The UV adhesive contains an acrylate oligomer, a monofunctional acrylate monomer, a bifunctional acrylate monomer, a trifunctional acrylate monomer, an acrylate monomer containing an acidic functional group, a photoinitiator, and an optional additive, wherein the acrylate oligomer simultaneously contains dibasic acid-modified bisphenol A epoxy acrylate, tetrafunctional branched polyester acrylate, and polyurethane acrylate with polyester diol as a backbone. The resulting UV adhesive has a high curing rate, can be cured by means of an LED, is suitable for a high-precision ink-jet process, meets reliability requirements, such as insulation, voltage resistance, boiling resistance in water, and salt spray resistance, and bonding strength requirements, can replace a PET blue film as an insulating protective layer for outer layer packaging of a power battery, and leaves room for lightweight battery design.

The present invention relates to a biodegradable polymer composition formed by waterborne radical emulsion polymerization of monomers selected from ethylenically unsaturated monomers characterized in that, the polymer composition is composed of at least two different populations of particles, said populations differing in average particle size value by at least a factor of 1.5, wherein (a) a population P1 is constituted by particles having an average particle size of greater than 250 nanometers, said particles being constituted of polymer chains predominantly built of ethylenically unsaturated monomers, further comprising 0.5 to 50% by C weight of oligomer lactide 2-hydroxyethyl, methacrylate terminated macromonomer, based on the total weight of the monomers, and (b) a population P2, distinctive of P1 by average particle size value, is constituted by particles having an average particle size of less than or equal to 250 nanometers, said particles being constituted of polymer chains predominantly built of ethylenically unsaturated monomers, further comprising 0.5 to 50% by weight of oligomer lactide 2-hydroxyethyl, methacrylate terminated macromonomer, based on the total weight of the monomers, wherein said two different populations jointly constitute at least 70% by weight, preferably 90% by weight, of the total polymeric content within said composition.

The invention discloses an organic silicon modified polyurethane-acrylate composite emulsion and a preparation method of the organic silicon modified polyurethane-acrylate composite emulsion, and relates to the technical field of polymer composite emulsions. Comprising the following raw materials: 70 to 120 parts of oligomer polyol with an average molecular weight of 500 to 2000, 5 to 15 parts of a composite organosilicon component, 40 to 80 parts of diisocyanate, 0.05 to 0.2 part of a catalyst, 2 to 5 parts of a hydrophilic chain extender, 3 to 6 parts of a self-crosslinking hydrophilic chain extender, 4 to 12 parts of a neutralizer, 2 to 8 parts of a water-based chain extender and 50 to 150 parts of an acrylate monomer. 1-5 parts of an acrylate functional monomer, 1-3 parts of a cross-linking agent, 2-8 parts of an emulsifier and 0.5-3 parts of an initiator; the organic silicon modified polyurethane-acrylate composite emulsion prepared by the invention has a composite core-shell structure taking organic silicon modified polyurethane as a core and an acrylate polymer as a shell, so that the emulsion can form a more compact and more stable three-dimensional cross-linked network during film formation, and the weather resistance, water resistance, mechanical strength and surface glossiness of a coating film are remarkably improved.

The invention belongs to the technical field of polyamide plastic recovery, and particularly relates to a method for recovering waste polyamide into a high-added-value product, which comprises the following steps: polyamide and cyclic lactone are subjected to depolymerization and preliminary polymerization reaction in an environment in which argon is continuously introduced, the reaction temperature is 220-280 DEG C, and the reaction time is 2-15 hours; then vacuumizing is carried out, micromolecule by-products generated in the reaction are discharged out of a reaction system, the reaction temperature is 220-280 DEG C, and the reaction time is 2-10 h. According to the method, polyamide and lactone are subjected to ring-opening copolymerization based on a one-step one-pot method to be recycled into a high-added-value product, the step of depolymerizing into a monomer or an oligomer in traditional chemical recycling is directly omitted, and the step of purifying the monomer is not needed; the thermal decomposition temperature and the mechanical property of the final product are equivalent to those of the purchased pure polyamide 66, and the tensile strength and the elongation at break of part of products are higher than those of the polyamide 66.

The invention belongs to the technical field of high polymer materials, and particularly relates to a self-repairing paint surface protection film based on asynchronous curing. The self-repairing paint surface protection film comprises a UV curing layer, a thermocuring layer and a base film, the thermocuring layer is positioned between the base film and the UV curing layer; the thermocuring layer is prepared from the following components: Zn-MOFs (Metal-Organic Frameworks) modified polycarbonate polyol resin and isocyanate; the UV curing layer is prepared from the following components: a fluorine-containing acrylate oligomer, KH-560 modified nano TiO2 and a photoinitiator; furthermore, the thermocuring layer further comprises a microencapsulation repairing agent. Correspondingly, the invention further provides a preparation method of the self-repairing paint surface protection film based on asynchronous curing. Self-repairing and weather resistance of the protective film are compatible, the problem that a single curing coating or a traditional synchronous curing coating cannot give consideration to self-repairing, weather resistance, water resistance, stain resistance and mechanical properties is solved, the highest elongation at break is larger than or equal to 320%, and the elongation at break is remarkably improved compared with the elongation at break of a single thermocuring system.

The invention discloses a method for preparing polyester industrial filaments by recycling polyester chips from waste spinning products and the polyester industrial filaments, and belongs to the technical field of chemical fibers. The method comprises the following steps: by taking waste spinning product recycled materials as raw materials, carrying out solid-phase tackifying on the polyester chips recycled by a DMT method to obtain high-viscosity chips; extruding and melting the high-viscosity slices to obtain a spinning melt; extruding the spinning melt to obtain a melt trickle; carrying out slow cooling treatment on the melt trickles, and cooling through circular blowing or lateral blowing to obtain a strand body; the filament body is stretched and shaped, then low polymer blowing and winding are carried out, and the industrial polyester filament is obtained. According to the method, the waste spinning products are used for recycling raw materials, the production process is optimized, resources are saved, incineration is reduced, carbon emission is avoided, landfill is reduced, environmental protection is facilitated, land occupation is reduced, and human health is protected; and good performance and qualified rate of the product are ensured, so that the physical performance, broken filament performance and spinnability of the final product can meet the requirements.

Provided is an ink composition for ultraviolet-curable inkjet printing comprising polymerization components, a resin component, and a photopolymerization initiator, wherein the polymerization components include (A) a polyfunctional amine-modified oligomer, (B) a nitrogen-containing monomer, (C) an aromatic ring-containing monomer, and (D) a polyfunctional monomer, wherein the resin component includes a hydroxyl group-containing resin, wherein (A) comprises an acrylated amine compound having two photopolymerizable functional groups and two amino groups in a molecule, wherein (B) comprises vinyl caprolactam, wherein (C) comprises benzyl acrylate and phenoxyethyl acrylate, wherein (D) comprises at least one of propoxylated neopentyl glycol diacrylate, dipropylene glycol diacrylate, or 1,6-hexanediol diacrylate, wherein a content of (A) is 0.1 to 13.0% by mass, wherein a content of (C) is 35.0 to 75.0% by mass, wherein a content of (D) is 2.0 to 16.0% by mass, and wherein the hydroxyl group-containing resin includes a ketone resin having a hydroxyl group.

The invention provides aliphatic polyester and application thereof, the aliphatic polyester comprises dibasic acid residues and dihydric alcohol residues, the dibasic acid residues comprise the following residues: a1) 65-90 mol% of succinic acid residues based on 100 mol% of the total mole percentage of a1) and a2), and a2) 10-20 mol% of dihydric alcohol residues based on 100 mol% of the total mole percentage of a1) and a2); a2), 10-35 mol% of sebacic acid residues based on 100 mol% of the total mole percentage content of a1) and a2); the dihydric alcohol residues are selected from 1, 4-butanediol residues which are at least equal to the dibasic acid residues in molar weight; the aliphatic polyester contains an oligomer of which the number-average molecular weight measured by GPC is less than 1000, and the mass percentage content of the oligomer of which the number-average molecular weight measured by GPC is less than 1000 in the aliphatic polyester is 0.08-3.5 wt%. The packaging film prepared from the aliphatic polyester has good food contact performance and uncoiling performance.

The invention discloses a high-adhesion UV LED coating composition and a preparation method thereof. The high-adhesion UV LED coating composition is prepared from the following raw materials in parts by weight: 50 to 70 parts of composite oligomer, 90 to 120 parts of composite reactive diluent, 1.5 to 2.5 parts of composite photoinitiator, 0.8 to 1.8 parts of composite adhesion promoter, 5 to 15 parts of inorganic filler, 0.6 to 1.5 parts of fluorine-modified acrylate flatting agent and 0.1 to 0.7 part of light stabilizer. The UV LED coating composition disclosed by the invention can be well combined with untreated low-polarity plastic, smooth metal surfaces and the like, has high adhesive force and is not easy to peel off after being subjected to external force.

The invention discloses an intrinsic anti-ultraviolet aging bio-based polyester elastomer and a preparation method thereof, and the preparation method comprises the following steps: under the protection of inert gas, mixing raw materials, a catalyst, lignin and an auxiliary agent according to a ratio, carrying out an esterification reaction to generate an oligomer, then carrying out a pre-polycondensation reaction under a vacuum condition, and then carrying out a final polycondensation reaction to obtain the intrinsic anti-ultraviolet aging bio-based polyester elastomer. The intrinsic anti-ultraviolet aging bio-based polyester elastomer is obtained. The bio-based polyester with high molecular weight and low melt index is prepared by utilizing a polyhydroxy structure of lignin, and the phenolic hydroxyl structure rich in lignin is utilized to provide ultraviolet aging resistance and other properties of the material, so that the problems of precipitation, poor compatibility and non-uniform dispersion of an ultraviolet aging resistant auxiliary agent after long-time use are avoided, and the 2, 4-dihydroxy-2, 4-dihydroxy-2, 4-dihydroxy-2, 4-dihydroxy-2, 4-dihydroxy-2, 4-dihydroxy-2, 4-dihydroxy-2, 4- The anti-ultraviolet aging and low melt index bio-based polyester elastomer which meets different strength and elasticity requirements and is directly prepared from 2, 5-furandicarboxylic acid, aliphatic diol, polyether glycol and lignin by a one-pot method can better adapt to market requirements, and the application field of the anti-ultraviolet aging and low melt index bio-based polyester elastomer is expanded.

The application discloses a glass fiber direct yarn impregnant and a preparation method thereof. The glass fiber direct yarn impregnant comprises effective components and water; the solid content of the impregnant is 5-12%, the effective components comprise a silane coupling agent, a film forming agent A, a film forming agent B and a lubricant, and the percentage of the solid mass of each effective component of the impregnant in the total mass of the solid of the impregnant is shown as follows: the silane coupling agent is 20-30%, the film forming agent A is 31-40%, the film forming agent B is 24-35%, the film forming agent A+the film forming agent B is 55-75%, and the lubricant is 5-15%; wherein the silane coupling agent is a bisamino silane oligomer, the film forming agent A is an isocyanate polymer, and the film forming agent B is an amide polymer. The glass fiber untwisted roving treated by the impregnant has stronger applicability of the glass fiber reinforced material for battery protection plates, the impact performance of the product is obviously improved, the bending performance is outstanding, and the market and application requirements are met.

The invention discloses a high-toughness and high-adhesion epoxy resin adhesive and a preparation method thereof, and relates to an epoxy resin adhesive and a preparation method thereof. The invention aims to solve the problems of high brittleness, low adhesion to metal materials such as steel, titanium alloy and nickel alloy and poor strength of the existing epoxy adhesive. The high-toughness and high-adhesion epoxy resin adhesive comprises a component A and a component B, the component A comprises the following components in parts by mass: epoxy resin, phosphate acrylate oligomer toughened epoxy resin, core-shell particle toughened epoxy resin and epoxy phosphate; and the component B comprises the following components in parts by mass: a polyamide curing agent, an alicyclic amine curing agent and a phosphate esterification curing agent. According to the invention, the phosphate esterification acrylate oligomer toughened epoxy resin and the core-shell particle type toughening agent are used for synergistic toughening, so that the toughness of the epoxy adhesive is greatly improved; the adhesive force of the epoxy adhesive to various metal materials is improved, and the high-toughness and high-adhesive-force epoxy resin adhesive is prepared.

The invention discloses a dual-curing rubbing primer as well as a preparation method and application thereof, and relates to the technical field of coatings. The dual-curing rubbing primer comprises a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 3 to 12 parts of solvent-containing acrylate oligomer, 8 to 17 parts of polyurethane polycarbonate resin, 3 to 12 parts of polyurethane acrylic resin, 3 to 7 parts of bifunctional acrylic monomer, 8 to 22 parts of hydroxyl-containing UV polyurethane resin, 1 to 2 parts of photoinitiator, 0 to 0.5 part of flatting agent and 50 to 60 parts of diluent; the component B is prepared from the following raw materials in parts by weight: 65 to 75 parts of aliphatic polyisocyanate and 25 to 35 parts of solvent. The coating can be stably attached to the surface of the epoxy glass fiber composite board, and is high in adhesive force and good in covering power and boiling resistance.

The invention relates to a chemically modified high-strength high-temperature-resistant polyurethane fiber and a preparation method thereof.The preparation method comprises the following steps that 1, oligomer mixed polyol and diisocyanate are subjected to a full prepolymerization reaction, a solvent is added for full dissolution, and a-NCO-terminated prepolymer polyurethane formate solution is obtained; 2) adding hydroxyalkyl silane and a catalyst into the prepared prepolymer, and fully reacting to obtain a modified prepolymer; (3) carrying out chain extension reaction and chain termination reaction on the prepared modified prepolymer to obtain a polyurethane urea solution; (4) adding an antioxidant, an ultraviolet light absorber, an anti-yellowing agent, a delustering agent and a lubricating and releasing agent into the polyurethane urea solution to prepare a polyurethane spinning solution; and (5) preparing the high-strength high-temperature-resistant polyurethane from the prepared polyurethane spinning solution by virtue of a dry spinning system. According to the invention, a polyurethane molecular chain is subjected to functional chemical modification, so that the product has the characteristics of high temperature resistance and high strength.

The invention discloses a preparation method of a multi-cured UV (ultraviolet) hot melt adhesive. A mixture of the UV hot melt adhesive is prepared from the following components in parts by weight: 40 to 70 parts of polyurethane acrylate oligomer, 5 to 20 parts of thermoplastic resin, 0.1 to 0.5 part of polymerization inhibitor and antioxidant, 2 to 5 parts of mixed photoinitiator and 5 to 20 parts of diluting monomer, wherein the polyurethane acrylate oligomer is synthesized by the following steps: S1, adding polyester polyol and a polyurethane metal organic catalyst into a flask, heating and uniformly stirring; s2, isocyanate is added in the step S1, heating reaction is performed, and a reactant A is obtained; s3, hydroxyl acrylate is added into the reactant A in the step S2, heating reaction is carried out, and the product polyurethane acrylate oligomer is obtained. The multi-curing LED-UV ultraviolet curing hot melt adhesive prepared by the preparation method disclosed by the invention has the characteristic of being capable of meeting the requirement of rapid ultraviolet curing, and the cohesiveness of the hot melt adhesive can be improved, so that the hot melt adhesive is an environment-friendly and efficient hot melt adhesive.

This application discloses an epoxy resin composite material and its preparation method, relating to the field of polymer materials. The epoxy resin composite material preparation method comprises the following steps: mixing isophorone diisocyanate and oxaloyl dihydrazide to react to obtain a first intermediate; mixing the first intermediate with a polyetheramine to react to obtain an oligomer curing agent having primary amino end groups; and mixing the oligomer curing agent with an epoxy resin matrix and modified basalt fiber, and curing to obtain the epoxy resin composite material; wherein the modified basalt fiber has epoxy groups on its surface. The epoxy resin composite material prepared by this preparation method has high strength and toughness.

The invention discloses a process for preparing functional master batch from waste textile recycled polyester, which comprises the following steps: S1, crushing waste polyester fabric into small fabric materials, and aggregating to obtain foam materials; s2, carrying out pre-alcoholysis on the soaked material, and filtering for the first time to obtain a pre-alcoholysis product; s3, carrying out total alcoholysis on the pre-alcoholysis product, and filtering for the second time to obtain an alcoholysis product; s4, carrying out adsorption treatment on the alcoholysis product, and carrying out pre-polycondensation to obtain an oligomer melt; s5, filtering the oligomer melt for the third time, and performing final polycondensation to obtain a final polycondensation melt; and S6, the final polycondensation melt is filtered for the fourth time, functional powder is added, uniform mixing, pelletizing, packaging and discharging are conducted, the regenerated functional master batch with more comprehensive performance and more stable quality is finally obtained, and recycling of the waste polyester textiles is achieved.

Coated articles and self- or easy-cleaning paint and coating compositions including a carrier liquid, a binder resin and additives, wherein such additives include, but are not limited to, a polymer or oligomer with at least one zwitterionic moiety. The carrier liquid is water, an organic solvent, or a combination thereof. The binder resin may be a waterborne latex, an acrylic-amino, alkyd, polyurethane, epoxy or other compatible resin. The paint and coating compositions may also contain pigment.

The invention relates to a UV-LED blue paint for protecting a power battery shell, a preparation method and a coating applied by the UV-LED blue paint, and belongs to the technical field of paints. The UV-LED blue coating is prepared from the following components in parts by weight: 5 to 15 parts of a polybutadiene modified acrylate oligomer, 20 to 40 parts of a bisphenol A epoxy acrylate oligomer, 35 to 50 parts of a monofunctional reactive diluent, 5 to 15 parts of a bifunctional reactive diluent, 3 to 10 parts of a multifunctional reactive diluent, 4 to 7 parts of a photoinitiator, 0.6 to 2.2 parts of an auxiliary agent and 1 to 3 parts of blue color paste, the monofunctional reactive diluent is prepared from the following components in parts by weight: 30 to 40 parts of isobornyl-containing acrylate and 5 to 10 parts of lauric acid acrylate. A blue coating formed by the blue coating has good adhesive force, excellent electrolyte resistance and boiling resistance and low viscosity, so that the blue coating can be subjected to mass production through spraying, the curing speed is high, and the production efficiency is improved.

The invention belongs to the field of composite materials and lithium batteries, and particularly relates to a preparation method of an isotropic porous carbon material, a porous carbon reinforced nonmetal or metal composite material and a preparation method and application of the porous carbon reinforced nonmetal or metal composite material. The preparation method comprises the following steps: carrying out heat treatment on a liquid polyacrylonitrile oligomer in a protective atmosphere to obtain a porous carbon precursor material; performing a high-temperature graphitization enhancement technology on the porous carbon precursor material in a protective atmosphere to obtain a porous carbon material; and quantitative pore forming is carried out by controlling oxygen flow in an oxygen atmosphere, so that the isotropic porous carbon material with uniformly distributed pore structures is prepared. The prepared isotropic porous carbon material is used as a reinforcing phase and compounded with metal or nonmetal to prepare composite materials with different properties, so that various properties of the composite materials are improved, and the isotropic porous carbon material can be applied to light high-strength structural parts in the fields of aerospace and automobile industry and can also be used as a negative electrode material in the field of lithium batteries.

The present invention relates to a method suitable for recovering textile waste comprising a polyester yarn containing a dye, the method comprising: a first step in which the polyester yarn is treated with a solvent to extract a portion of the dye from the polyester yarn; a second step in which the solvent-treated polyester yarn is subjected to a process in which the polyester is depolymerized into an oligoester consisting on average of between 3 and 30 monomeric units wherein the remainder of the dye is removed from the oligoester by adsorption to particulate matter in a mixture with the oligoester; and a third step in which the oligoester is separated from the particulate matter comprising the adsorbed dye, thereby providing a decolorized oligoester suitable for repolymerization, consisting on average of between 3 and 30 monomeric units.

The invention relates to the technical field of polyester fiber processing, in particular to a quick-drying deodorizing antibacterial antistatic polyester fiber and a preparation method thereof. The invention discloses a modified PET (Polyethylene Terephthalate) composite material, which is prepared from the following raw materials in parts by weight: 100 parts of PET, 4 to 8 parts of functional master batch, 5 to 8 parts of epoxy functionalized styrene-acrylate oligomer, 10 to 20 parts of silane coupling agent modified montmorillonite, 5 to 8 parts of hydroxypropyl-beta-cyclodextrin loaded porous silicon dioxide microspheres, 1 to 2 parts of sulfoisophthalic acid metal salt and 2 to 4 parts of dispersing agent. The multifunctional master batch is prepared from the following raw materials in parts by weight: 65-75 parts of PET polyester chips, 8-12 parts of epoxy-terminated hyperbranched polyester, 3-5 parts of a sulfonate antistatic agent and 2-4 parts of an antibacterial agent, through the formula, balanced integration of moisture absorption, quick drying, lasting deodorization, efficient antibacterial and antistatic functions is realized, the function retention rate is improved after multiple times of washing, and the antibacterial property is improved. The defects of single function and poor durability of an after-treatment mode are overcome, and the development requirements of modern textiles on multi-functionalization and high quality are met.

A polyester resin composition exhibits high heat resistance, low gas content, and the ability to significantly suppress mold contamination during continuous molding and to inhibit flow marks. The polyester resin composition comprises: a polyester resin A containing 82-88% by mass of polybutylene terephthalate resin and 12-18% by mass of polyethylene terephthalate resin; an organometallic acid salt B, selected from one or both of alkali metal organometallic acid salts and alkaline earth metal organometallic acid salts; 1-13 parts by mass of an inorganic filler C with an average particle size of 0.05-3 μm relative to 100 parts by mass of the polyester resin A; and 0.000005-0.05 parts by mass of one or both of alkali metal atoms and alkaline earth metal atoms relative to 100 parts by mass of the polyester resin A; and the content of linear oligomers such as polybutylene terephthalate is less than 1000 mg / kg.

The invention discloses a method for preparing a PA6 / 56 bio-based copolyamide fiber through melt direct spinning, which comprises the following steps: mixing raw materials containing a caprolactam solution, a PA56 salt solution and a molecular weight regulator, preheating, carrying out prepolymerization reaction and polycondensation reaction to obtain a PA6 / 56 copolymer melt, and carrying out devolatilization to obtain a PA6 / 56 devolatilization melt; and carrying out melt spinning on the PA6 / 56 devolatilization melt to obtain the PA6 / 56 bio-based copolyamide fiber. According to the invention, bio-based 1, 5-pentamethylene diamine is adopted as a raw material of PA56, preheating and pre-polycondensation are firstly carried out after configuration, then polycondensation is carried out to further increase the number-average molecular weight of a nylon 6 prepolymer, and the obtained copolymer melt is in a molten state. Low polymers of the copolymer are removed through the devolatilization reactor, liquid phase extraction of PA6 / 56 is achieved, the extractable matter content of the obtained copolymer melt is smaller than or equal to 2 wt%, the technological process is simplified, and the production cycle, the equipment investment cost and the production energy consumption are greatly reduced.