364 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.

A process for chemically recycling waste polyethylene terephthalate (PET) carpet fibers. The process comprises providing a waste carpet fiber composition comprising at least 75 wt % of PET and 6 wt % or less of ash; reacting the waste carpet fiber composition with methanol to produce a depolymerized poly ester mixture comprising polyester oligomers, dimethyl terephthalate (DMT), and ethylene glycol (EG); and recovering the DMT and the EG from the depolymerized polyester mixture.

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.

A method for preparing a cationic dyeable flame-retardant high-strength polyester fiber is provided, after mixing oligomer A, oligomer B, and ethylene terephthalate and carrying out a polycondensation reaction to obtain a cationic dyeable flame-retardant polyester masterbatch, adding the cationic dyeable flame-retardant polyester masterbatch to the polyester chips according to a certain ratio for melt spinning, to prepare the cationic dyeable flame-retardant high-strength polyester fiber; oligomer A is prepared by the esterification reaction of a phosphorus flame retardant and a diol; oligomer B is prepared by the esterification reaction of sodium isophthalate sulfonate and a diol; the ratio of the sum of the molar weight of oligomer A and oligomer B to the molar weight of ethylene terephthalate is 3:7-6:4. The preparation method is simple, and the cationic dyeable flame-retardant high-strength polyester fiber has excellent mechanical properties, and can be used in automobiles, ships, and the interior decoration of high-class hotels.

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 invention relates to a UV viscosity-reducing adhesive, a UV viscosity-reducing adhesive composition, an adhesive tape and a preparation method. The UV viscosity-reducing adhesive comprises an acrylate copolymer, wherein the acrylate copolymer comprises a main chain and a multifunctional acrylate side group grafted on the main chain; the main chain is formed by copolymerizing a plurality of polymeric monomers including an acrylate soft monomer, an acrylate hard monomer and a functional acrylate monomer; the acrylate soft monomer is acrylate long-chain alkyl ester, and the carbon atom number of the long-chain alkyl ester is greater than or equal to 4; the acrylate hard monomer is methyl (methyl) acrylate; the functional acrylate monomer is acrylic acid (ester) containing carboxyl and acrylic ester containing hydroxyl; the polyfunctional group acrylate side group is formed by a UV active substance, each molecule of which contains a plurality of acrylate groups and contains one epoxy group, through a reaction between the epoxy group and the carboxyl group on the main chain. The UV viscosity-reducing adhesive has a UV viscosity-reducing function, does not need to additionally add UV active monomers or low polymers, can enhance the UV light viscosity-reducing effect and improve the viscosity-reducing efficiency, and is also beneficial to reducing the ingredient composition of a UV adhesive material and simplifying the preparation method.

The invention discloses an in-situ inorganic hybridization reinforced polyurethane resin and a preparation method thereof. An inorganic in-situ bonding structure of the in-situ inorganic hybridization reinforced polyurethane resin can effectively control the strength and hardness of the polyurethane resin; and the organic auxiliary agent can effectively reduce the curing speed of the high-activity component, so that the system resin can be simultaneously applied to use scenes with different curing speeds and different hardness requirements. The in-situ inorganic hybridization reinforced polyurethane resin comprises a component A and a component B. The component A is prepared from the following components in parts by mass: 100 parts of isocyanate-terminated polyurethane oligomer, 4.5 to 102 parts of monomer polyisocyanate b, 2.9 to 4.4 parts of reaction speed regulator and 0 to 1.2 parts of catalyst a; the component B is prepared from the following components in parts by mass: 14.5 to 89.6 parts of silanol, 0 to 2 parts of glycerol and 0 to 1.2 parts of catalyst b; wherein in use, the component A and the component B are mixed according to the mass ratio of (1.66-7.1): 1 to obtain the in-situ inorganic hybridization reinforced polyurethane resin.

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 a fireproof flame-retardant spinning yarn and a preparation method thereof, and relates to the technical field of spinning yarns. When the fireproof flame-retardant spinning yarn is prepared, benzyl benzoate is used as a core material, chitosan is used as a wall material, and pentenedialdehyde is used as a cross-linking agent to prepare an anti-mite microcapsule; carrying out condensation polymerization on ethylene glycol, a hydroxyl-terminated siloxane oligomer, the functionalized DOPO and dimethyl terephthalate to prepare functionalized polyester; the functional polyester and the anti-mite microcapsules are prepared into a spinning solution, and the polyester fiber is prepared through electrostatic spinning; reacting cotton fibers with maleic anhydride and o-phenylenediamine in sequence to obtain modified cotton fibers; polyester fibers and modified cotton fibers are blended in a spinning machine to prepare blended yarns, and the blended yarns are post-treated with chloroplatinic acid to prepare the fireproof flame-retardant spun yarns. The fireproof flame-retardant spinning yarn prepared by the invention has excellent anti-mite, flame-retardant and mechanical properties.

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 photovoltaic module gap synergistic positioning adhesive tape and a preparation method thereof. The photovoltaic module gap synergistic positioning adhesive tape comprises a base material layer, a functional layer and a bonding layer which are sequentially compounded from top to bottom. The gap synergistic positioning adhesive tape for the photovoltaic module is mainly applied between battery pieces and strings of the photovoltaic module, has a positioning function, and can improve the power generation power of the photovoltaic module through the light reflection performance; under the lamination temperature of 120-150 DEG C, a sufficient buffering effect is provided through the functional layer, so that the subfissure and fragment of the battery are prevented; the bonding layer is made of a polyethylene glycol oligomer containing t-butyloxycarboryl, and when the photovoltaic module needs to be repaired, the bonding layer can be heated by an infrared lamp to quickly lose viscosity, so that the photovoltaic module is easy to repair, more cell pieces are prevented from being broken when the positioning adhesive tape is torn off, and the service life of the photovoltaic module is prolonged. Meanwhile, by adopting the t-butyloxycarboryl polyethylene glycol oligomer, the raw materials can be promoted to be uniformly dispersed, and the viscosity and the reflectivity of the gap synergistic positioning adhesive tape for the photovoltaic module can be improved.

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.

A first aspect of the invention relates to a process for recycling of a colored polymeric material, wherein the colored polymeric material comprises (i) a polyalkylene terephthalate based polymer, (ii) a colorant and optionally (iii) a second polymer different from the polyalkylene terephthalate based polymer of (i) and optionally (iv) a third polymer different from the polyalkylene terephthalate based polymer of (i) and different from the second polymer of (iii), the process comprising (a) providing a colored polymeric material and a solvent system comprising gamma valerolactone (GVL); (b) contacting the colored polymeric material provided in (a) with the solvent system comprising GVL provided in (a) under conditions allowing for colorant removal but not allowing for dissolution of the polyalkylene terephthalate based polymer, thereby obtaining a solvent system, which is enriched in colorant compared to the solvent system provided, and a polymeric material, which is depleted in colorant compared to the colored polymeric material provided in (a); (c) depolymerisation or transesterification of the polymeric material, which is depleted in colorant obtained in (b); thereby obtaining monomers and / or oligomers or transesterification products. In a second aspect, the invention relates to a monomer, oligomer or transesterification product of a polyalkylene terephthalate based polymer obtained or obtainable by the process of the first aspect. A third aspect relates to a process comprising converting, preferably polymerizing, the monomers, oligomers or transesterification products of a polyalkylene terephthalate based polymer obtained from the process of the first aspect to obtain one or more polymer or polymer product. A fourth aspect relates to a process comprising converting the separated second polymer (iii) and / or the separated third polymer (iv) obtainable by or obtained from the process of the first aspect to obtain one or more monomer, polymer or polymer product.

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 belongs to the related technical field of photocuring forming, and discloses a photocuring forming-based nanoscale silicon carbide ceramic preparation method and a product, and the method comprises the following steps: mixing absolute ethyl alcohol, high refractive index resin powder and silicon carbide powder to obtain silicon carbide slurry; adding the silicon carbide slurry into warm water, and carrying out cold isostatic pressing treatment to obtain silicon carbide granulation powder; mixing silicon carbide, an active diluent, an oligomer, high-refractive-index resin, a photoinitiator and other auxiliaries to obtain a resin premixed solution; mixing the resin premixed liquid with the silicon carbide granulation powder to obtain silicon carbide light-cured slurry; 3D printing and post-treatment are conducted on the silicon carbide light-cured slurry to obtain the silicon carbide part, an ethanol solution of high-refractive-index resin powder is used for coating nanoscale silicon carbide particles, the ethanol solution of the high-refractive-index resin powder serves as a binder at the same time, and the particle size of the silicon carbide particles is changed into micron-scale particles from the nanoscale particles.

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 belongs to the technical field of polyester recycling, and relates to a recycled polyester pore-foaming agent as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, carrying out ester exchange reaction on waste polylactic acid and aliphatic dibasic acid to obtain a double-carboxyl-terminated polylactic acid oligomer, then mixing the double-carboxyl-terminated polylactic acid oligomer, polyether glycol, oligomer diol and an inorganic porous material, and carrying out polycondensation reaction, the recycled polyester pore-foaming agent containing the water-soluble polylactic acid and the inorganic porous material is obtained. According to the application, the regenerated polyester pore-foaming agent and fiber-grade polyester are subjected to melt blending spinning to prepare blended fibers, and then the blended fibers are subjected to soaking treatment to prepare the porous fibers. The method not only solves the problem of resource waste of waste polylactic acid, but also provides a new way for green preparation of porous fibers, and has important practical significance and environmental protection value.

The invention relates to multifunctional waterborne polyurethane coating liquid as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out a reaction on dihydroxyl single-terminated polydimethylsiloxane, a hydroxyl-terminated oligomer and diisocyanate to prepare a polyurethane prepolymer, and adding a dihydroxyl hydrophilic chain extender to further introduce a hydrophilic group, thereby synthesizing the waterborne polyurethane coating liquid which can be applied to fabrics. The fabric treated by the waterborne polyurethane coating liquid has a molecular brush-like structure, the water repellency of the fabric is greatly improved, and the anti-doodling, self-cleaning and other antifouling properties are also greatly improved. Moreover, hydrophilic groups are introduced into the waterborne polyurethane coating liquid, so that the antistatic property of the fabric treated by the waterborne polyurethane coating liquid is greatly improved. Meanwhile, the fabric containing the waterborne polyurethane coating liquid has a compact cross-linked network, and the water resistance and wear resistance of the fabric are further enhanced after drying and curing.

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 relates to a PBAT-PLA copolyester and a preparation method thereof. The preparation method of the PBAT-PLA copolyester comprises the following steps: preparing a PBAT copolyester oligomer: mixing terephthalic acid, adipic acid, 1, 4-butanediol and a catalyst 1, and carrying out esterification reaction to obtain a PBAT co-ester; and carrying out a pre-polycondensation reaction on the PBAT co-ester to obtain a PBAT prepolymer, namely the PBAT copolyester oligomer, preparing a PLA resin oligomer: mixing lactic acid with a catalyst 2, and carrying out esterification reaction to obtain a PLA ester; the PLA ester is subjected to a pre-polycondensation reaction, and a PLA prepolymer, namely the PLA resin oligomer, is obtained; and preparing a final polymer: carrying out melt blending on the PBAT prepolymer and the PLA prepolymer, adding a catalyst 3, and carrying out condensation polymerization to obtain the PBAT-PLA final polymer, namely the PBAT-PLA copolyester. According to the PBAT-PLA copolyester and the preparation method thereof, the preparation method is green, environment-friendly, low in cost and simple, and the problem that PBAT and PLA are difficult to be compatible is solved.

The invention discloses wear-resistant and environment-friendly TPU for an automobile foot mat and a preparation method of the wear-resistant and environment-friendly TPU. The environment-friendly TPU is prepared from the following raw materials in parts by weight: 20 to 30 parts of diisocyanate, 50 to 80 parts of oligomer polyol, 30 to 45 parts of epoxy resin, 20 to 30 parts of a fiber compound, 10 to 15 parts of hollow glass beads, 5 to 8 parts of an amino silane coupling agent and 0.5 to 1 part of a catalyst. The fiber compound comprises carbon fibers and steel fibers, and the weight ratio of the carbon fibers to the steel fibers is 1: 1. The wear-resistant environment-friendly TPU material for the automobile foot mat has the advantages of being good in wear resistance and tensile strength.

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.