529 results about "Binary acid" patented technology

The invention relates to polyurethane resin, synthetic leather and a preparation method and application thereof, and relates to the technical field of polyurethane, the polyurethane resin is prepared from the following raw materials: bio-based polyester polyol, polyolefin polyol, isocyanate, a chain extender, a pore-forming agent and a solvent; the bio-based polyester polyol is prepared from the following raw materials: bio-based dihydric alcohol, bio-based dibasic acid and micromolecular branched chain-containing dihydric alcohol. The polyurethane resin provided by the invention is high in bio-based content, micromolecular branched chain-containing dihydric alcohol is introduced into bio-based polyester polyol, a branched chain structure provides scratch resistance for the synthetic leather taking the polyurethane resin as a coating layer, the crystallinity of the polyurethane resin is reduced by compounding the polyolefin polyol, the synthetic leather is endowed with soft hand feeling, and the synthetic leather has the advantages that the synthetic leather is not prone to being scratched, and the service life of the synthetic leather is prolonged. Due to the addition of the chain extender and the pore-forming agent, the polyurethane has excellent foaming performance, the synthetic leather has excellent water absorption, and the hand feeling of the synthetic leather is further improved.

The invention relates to the field of cutting fluids, and discloses a high-hardness brittle semiconductor anti-deterioration cutting fluid and a production process thereof, the cutting fluid comprises the following components by weight: 15-25 parts of a lubricant, 10-20 parts of an anti-wear modifier, 1-5 parts of organic acid, 5-15 parts of organic amine, 1-3 parts of a lubricating antibacterial additive, 0.1-0.3 part of a bactericide, 0.5-2 parts of a wetting agent, 0.1-0.5 part of an antifoaming agent, and 25-35 parts of deionized water; the anti-wear modifier is prepared by taking aminated nano hexagonal boron nitride as a carrier to grow silicon dioxide nanoparticles in situ and carrying out composite hybridization on the silicon dioxide nanoparticles and binary acid ionic liquid, and the binary acid ionic liquid is prepared from 2-(1, 3-benzothiazole-2-sulfenyl) succinic acid and choline hydroxide; the lubricating antibacterial additive is prepared from aminated nano hexagonal boron nitride, chitosan and ethylene glycol diglycidyl ether, and by adding the anti-wear modifier and the lubricating antibacterial additive, the cutting fluid is endowed with excellent lubricating wear resistance, antibacterial property and anti-rust performance.

The invention provides a preparation method of a nylon elastomer with good dyeing property, antibacterial property and antistatic property. The preparation method comprises the following steps: S1, preparing a dicarboxyl-terminated nylon hard segment from binary acid, diamine or lactam and an end-capping reagent; s2, reacting the dicarboxyl-terminated nylon hard segment with polyether polyol to generate a dicarboxyl-terminated nylon elastomer with a certain molecular weight; s3, reacting the double-carboxyl-terminated nylon elastomer with the double-amino-terminated aminoguanidine compound to generate a double-amino-terminated nylon elastomer with a guanidyl group; and S4, dipping the double-amino-terminated nylon elastomer with the guanidyl group by using an anionic antistatic agent solution. The novel nylon elastomer prepared by the invention has higher molecular weight, the dyeing property of the novel nylon elastomer is favorably improved by diamino-terminated end, guanidyl is introduced in a copolymerization manner, so that the novel nylon elastomer has good antibacterial property, and meanwhile, the guanidyl is combined with the anionic antistatic agent through an ionic bond, so that the nylon elastomer has firmer antistatic property.

The invention discloses copolymerized nylon 6 resin with a synergistic flame-retardant effect and a preparation method of the copolymerized nylon 6 resin. The molecular structure of the copolymerized nylon 6 resin with the synergistic flame-retardant effect is shown as a formula I. The preparation method of the copolymerized nylon 6 resin with the synergistic flame-retardant effect comprises the steps that phosphorus-containing binary acid and low-molecular-weight amino-terminated organic silicon (Mn < = 2000) are subjected to a salt forming reaction to prepare a component A, and then the component A and caprolactam are copolymerized to obtain the copolymerized nylon 6 resin with the synergistic flame-retardant effect. The copolymer nylon 6 resin with excellent mechanical and flame retardant properties is obtained by regulating and controlling the molecular weight of the amino-terminated organic silicon and the copolymerization ratio of the component A, and the copolymer nylon 6 resin is simple in synthesis route and environment-friendly in technological process. # imgabs0 #

The invention relates to the technical field of material preparation, and discloses a polyamide elastomer and a preparation method and application thereof, and the preparation method of the polyamide elastomer comprises the following steps: mixing raw materials, and carrying out amidation reaction to obtain an amide compound; then adding a catalyst B, and carrying out polyesterification reaction to obtain a polyamide elastomer; the raw materials comprise binary acid, diamine, polyether glycol, a catalyst A and water, the reaction temperature of the amidation reaction is 150-180 DEG C, and the addition amount of the water is 20-40% of the total mass of the binary acid, the diamine and the polyether glycol. The polyamide elastomer which is relatively regular in structure and excellent in comprehensive performance can be prepared, the reaction efficiency can be effectively improved, and the preparation method is suitable for industrial large-scale production.

The invention relates to the technical field of polyester resin, and discloses a preparation method and application of super-weather-resistant HAA curing type extinction polyester resin, neopentyl glycol, a triazine phenyl imide diol monomer, binary acid, an esterification catalyst, an onium salt curing accelerator and the like are subjected to a reaction, and the super-weather-resistant HAA curing type extinction polyester resin is obtained. The triazine phenyl imide diol monomer has a phenyl imide ring and triazine ring structure with heat resistance and structural stability, is beneficial to improving the high temperature resistance and mechanical strength of a polyester resin powder coating paint film, shows higher impact resistance, contains a dialkyl side chain, and can be used for preparing the polyester resin powder coating after being introduced into a polyester molecular chain. The modified polyester resin can generate steric hindrance and shielding effects, inhibit contact between water molecules and ester bonds in polyester molecular chains and reduce hydrolysis reaction of ester groups, so that the hydrolysis resistance of the polyester resin is improved. And the paint film has the advantages of good ultraviolet aging resistance, high weather resistance and high gloss retention rate.

The invention relates to hydrolysis-resistant polyester polyol with high bio-based content, polyurethane resin for a synthetic leather surface layer and a preparation method of the hydrolysis-resistant polyester polyol. The hydrolysis-resistant polyester polyol with high bio-based content comprises the following raw materials: bio-based dihydric alcohol, bio-based dibasic acid, an antioxidant and a catalyst. In the hydrolysis-resistant polyester polyol with high bio-based content, provided by the invention, the bio-based dihydric alcohol not only comprises micromolecular bio-based 1, 3-propylene glycol, but also comprises low-carbon environment-friendly long-chain polypropylene carbonate dihydric alcohol with molecular weight of 1000, so that the crystallinity and hardness of the bio-based polyester polyol are reduced; the hydrolysis resistance and flexibility of the bio-based polyester polyol are improved, the hydrolysis resistance of polyurethane resin for a synthetic leather surface layer prepared from the hydrolysis-resistant polyester polyol with the high bio-based content is synchronously improved, and the stable dispersion performance of pigment is good.

The invention relates to the technical field of polyester resin, and discloses outdoor hydrolysis-resistant polyester resin and a preparation method and application thereof.The outdoor hydrolysis-resistant polyester resin is prepared from, by weight, 30-38 parts of polyhydric alcohol, 48-50 parts of binary acid, 20.5-28.5 parts of acidolysis agent and 0.1-0.12 part of onium salt curing accelerator; according to the invention, 2-butyl-2-ethyl-1, 3-propylene glycol is used as polyol, and an alkyl side chain is introduced into polyester molecules to generate steric hindrance and shielding effects, so that water molecules are difficult to attack adjacent lipid bonds, and the hydrolysis resistance of the polyester resin is improved. 2, 2 '-[(2-hydroxy-3-phenoxy propyl) azadiyl] diethanol contains a benzene ring structure with thermal stability, and is crosslinked into a polyester molecular chain, so that the glass transition temperature of the polyester resin can be increased, the heat resistance can be improved, and the boiling water resistance of a resin coating can be improved.

The invention belongs to the technical field of high polymer materials, and particularly discloses a halogen-free flame retardant DOPO-NH2 and a preparation method of halogen-free flame-retardant polyamide of the halogen-free flame retardant DOPO-NH2. The halogen-free flame retardant DOPO-NH2 is prepared by taking DOPO and 1, 4-butanediol as raw materials, and carrying out nitration and hydrogenation reduction reaction. The flame retardant DOPO-NH2 is mixed with binary acid and water to prepare a flame retardant organic salt solution, and then the flame retardant organic salt solution is subjected to polymerization reaction with a polyamide salt solution formed by a salt forming reaction of diamine and binary acid to prepare the halogen-free flame-retardant polyamide resin. The halogen-free flame-retardant polyamide prepared by the invention is excellent in flame retardant property, and can obtain a good flame retardant effect under different addition amounts; the limit oxygen index is basically more than 33%, the vertical combustion test reaches the UL94V-0 level, and the flame-free flame retardant is self-extinguished in the combustion test, and no molten drop is generated; the preparation method and process are simple, mild in condition and easy to operate.

The invention provides copolymerized flame-retardant nylon containing nitrogen and phosphorus as well as a preparation method and application of the copolymerized flame-retardant nylon. The copolymerized flame-retardant nylon containing nitrogen and phosphorus is formed by copolymerizing a structural unit I and lactam or copolymerizing the structural unit I, diamine and binary acid, the nitrogen and phosphorus-containing copolymerized flame-retardant nylon belongs to a halogen-free flame-retardant environment-friendly high polymer material and is intrinsic flame-retardant nylon, so that the problems of flame retardant migration, compatibility with a base material and the like do not exist, excellent flame-retardant performance can be achieved under the condition of relatively low introduction amount of a flame-retardant structural unit, and meanwhile, excellent mechanical property and spinnability can be kept.

The invention provides a thermoplastic polyester elastomer as well as a preparation method and application thereof. The thermoplastic polyester elastomer comprises aromatic dibasic acid residues and aliphatic polyol residues, on the basis that the total molar weight of the aliphatic polyol residues is 100 mol%, the aliphatic polyol residues comprise 66 to 95 mol% of micromolecular diol residues, 2 to 24 mol% of polymer polyol residues and 1.5 to 10 mol% of third polyol residues; the third polyhydric alcohol residues comprise residues derived from a benzotriazole compound and residues derived from a tetramethyl piperidine compound. The thermoplastic polyester elastomer is good in light aging resistance, the surface of a workpiece is not separated out in the processing process and after the thermoplastic polyester elastomer is placed for a long time, and the requirement of automobile interiors for color change of light-color materials after light aging is met.

The invention relates to the technical field of multi-layer copolyester films, and discloses a high-temperature-resistant antistatic multi-layer copolyester film and a preparation method and application thereof, and the multi-layer copolyester film comprises an ABA three-layer structure obtained through melt co-extrusion; the layer A is prepared from the following raw materials in percentage by mass: 5 to 30 percent of anti-blocking agent master batch and the balance of modified copolyester; the raw material of the layer B is modified copolyester; the modified copolyester is prepared from a binary acid mixture, a dihydric alcohol mixture and a catalyst through an esterification reaction and a condensation polymerization reaction; the binary acid mixture comprises furandicarboxylic acid and 2, 2 '-bifuran-5, 5'-dicarboxylic acid, and the dihydric alcohol mixture comprises ethylene glycol, 2, 2, 4, 4-tetramethyl-1, 3-cyclobutanediol and 1, 4-cyclohexanedimethanol. According to the invention, the modified copolyester is used as a main raw material, and the film is endowed with good temperature resistance in a copolymerization modification manner, and has stable and lasting antistatic performance.

The present invention provides a polyester hot melt adhesive and a preparation method and application thereof. The polyester hot melt adhesive comprises 50-60 parts of a first polyester resin, 10-20 parts of a second polyester resin and 20-30 parts of a third polyester resin in parts by weight; the raw materials for preparing the first polyester resin include aromatic dibasic acid, diol and polyamine; the raw materials for preparing the second polyester resin include aliphatic dibasic acid and aliphatic long-chain diol; the raw materials for preparing the third polyester resin include dibasic acid, diol and polypropylene grafted maleic anhydride. In the present invention, the polyester hot melt adhesive is compounded by three polyester resins with specific structures, so that the polyester hot melt adhesive has both excellent high temperature resistance and low temperature resistance, can be used for a long time under high and low temperature conditions, will not have debonding, film shrinkage, edge warping and other phenomena, has good high and low temperature cycle resistance, and has low construction viscosity, good adhesion to a variety of substrates, high adhesion, and a wide range of applications.

The invention belongs to the technical field of polyurethane resin, and provides polyurethane resin, polyurethane synthetic leather and a preparation method and application thereof. The preparation raw materials of the polyurethane resin comprise the following components in percentage by mass: 11%-18% of modified polyol, 3%-9% of bio-based polyol A, 0.01%-0.02% of an antioxidant, 0.001%-0.003% of a catalyst, 5%-7% of isocyanate, 0.5%-3% of a chain extender, 0.1%-0.4% of a terminator, 0.02%-0.04% of an anti-visbreaking aid, 0.5%-3% of a polyether aid and 68%-73% of a solvent, wherein the preparation raw materials of the modified polyol comprise bio-based polyol, alcohol amine and binary acid; the bio-based polyol A comprises bio-based polypropylene carbonate dihydric alcohol. The polyurethane synthetic leather prepared by the preparation method disclosed by the invention has good slip resistance, excellent perspiration-resistant color fastness and relatively high blackness, and is suitable for yoga mats.

The invention belongs to the technical field of polyurethane elastomers, and particularly relates to an anti-static high-temperature-resistant polyurethane microporous elastomer and a preparation method thereof. Comprising a component A and a component B. The component A comprises conventional polyester polyol, functionalized polyester polyol, polyester polymer polyol, a chain extender, a cross-linking agent, a foam stabilizer, a foaming agent and a catalyst, and the component B comprises conventional polyester polyol, functionalized polyester polyol, polyether polyol and isocyanate. The functional polyester polyol is prepared by mixing activated carbon powder modified neopentyl glycol with straight-chain small-molecular dihydric alcohol and then carrying out esterification reaction on the mixture and dibasic acid. The prepared anti-static high-temperature-resistant polyurethane microporous elastomer has excellent conductivity and high-temperature resistance, and is good in skin, high in bearing capacity and high in thermal deformation temperature.

The invention belongs to the technical field of urethane acrylate, and particularly relates to urethane acrylate for a UV photocuring adhesive as well as a preparation method and application of the urethane acrylate. The polyurethane acrylate for the UV photocuring adhesive is prepared from the following raw materials: 30 to 80 parts of unsaturated polyester polyol, 24 to 32 parts of an isocyanate intermediate and 2 to 6 parts of hydroxyl acrylate, the unsaturated polyester polyol is prepared by taking unsaturated small-molecular dibasic acid, saturated small-molecular dibasic acid and small-molecular dihydric alcohol as raw materials; the isocyanate intermediate is prepared by reacting an isocyanate monomer with polyol. The polyurethane acrylate for the UV light-cured adhesive is applied to preparation of the UV light-cured polyurethane acrylate adhesive, so that the high-temperature resistance and high-humidity resistance of the UV light-cured adhesive are improved, and the service life of the UV light-cured adhesive is prolonged; the invention also provides a preparation method thereof.

The invention provides high-transparency weather-resistant polyester resin and a preparation method thereof, and belongs to the technical field of high polymer materials, and the preparation method comprises the following steps: sequentially adding polyol, binary acid and a catalyst into a reaction kettle, heating while stirring, heating for 1-2 hours at the temperature of 160-180 DEG C, heating to 235-250 DEG C, carrying out heat preservation reaction for 12-14 hours, and cooling to room temperature to obtain the high-transparency weather-resistant polyester resin. Adding an acidolysis agent to react for 3-4 hours, vacuumizing for 1-3 hours, adding a curing accelerator and an antioxidant, stirring for 20-40 minutes, discharging, cooling and crushing to obtain the high-transparency weather-resistant polyester resin. Wherein the polyhydric alcohol is a mixture of neopentyl glycol, tricyclic dodecanedimethanol, ethyl butyl propylene glycol and trimethylolpropane. The polyester resin prepared by the invention is applied to polyester transparent powder paint, can obviously improve the transparency and weather resistance of a coating, and has good mechanical property and leveling property.

The invention discloses an anti-aging poly (butylene terephthalate)-sebacate copolymer and a preparation method thereof, and belongs to the technical field of high polymer materials, the anti-aging poly (butylene terephthalate)-sebacate copolymer comprises the following preparation raw materials: binary acid, dihydric alcohol, a cross-linking agent, a catalyst, a stabilizer, an anti-hydrolysis agent and an antioxidant; by adding the cross-linking agent, the catalyst, the stabilizer, the anti-hydrolysis agent and the antioxidant, the damp-heat aging resistance stability of the PBSeT resin is remarkably improved, the shelf life of a PBSeT product is prolonged, and meanwhile, the PBSeT resin has a certain bio-based content, so that the PBSeT resin can be used as a high-temperature-resistant material for the high-temperature-resistant high-temperature-resistant material for the high-temperature-resistant high-temperature-resistant high-temperature-resistant material. The requirements of some fields on the bio-based content can be met, the problem that the PBAT resin does not contain the bio-based can be solved, and the PBAT resin has a wide application prospect.

The invention belongs to the technical field of copolymerization modification of degradable polyester, and discloses a preparation method of tertiary amine modified rapidly degradable polyester, which comprises the following steps: in the presence of a catalyst and an auxiliary agent, carrying out esterification, pre-polycondensation and polycondensation on tertiary amine, dibasic acid and dihydric alcohol to prepare the tertiary amine modified rapidly degradable polyester, the structural formula of the tertiary amine is RN (CH2CH2OH) 2, R is a side group, and the side group at least contains one hydroxyl group. The preparation method is simple and easy to implement, the prepared tertiary amine modified rapidly degradable polyester can be hydrolyzed, the mass loss within 49 days can reach 3-20%, especially hydrolysis can be further accelerated after oxidation treatment, and meanwhile the breaking strength of copolyester is enhanced.

The EPDM composition is a rubber composition obtained by blending carbon black, a plasticizer and a cross-linking agent in an ethylene-propylene-diene ternary copolymer rubber, the plasticizer is a polyol ester, the polyol ester is a reaction product of a neopentyl polyol and a monocarboxylic acid, and the amount of the plasticizer in the composition is 5-22 wt%. The EPDM composition does not damage the mixing property and the processability, and the hardness change of the obtained cross-linked product after a thermal aging test is the same as that of the cross-linked product under the condition of matching the same parts of alpha-olefin oligomer, and is greatly improved compared with that of the cross-linked product under the condition of matching aliphatic dibasic acid ester.

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 invention provides a modified copolyester film as well as a preparation method and application thereof. The modified copolyester film is prepared from the following raw materials: binary acid, dihydric alcohol and a catalyst, the binary acid comprises 2, 5-furandicarboxylic acid and other binary acid; the dihydric alcohol comprises neopentyl glycol and other dihydric alcohol. 2, 5-furandicarboxylic acid is introduced into a modified copolyester molecular chain, so that the polarity and hydrophilicity of polyester are improved, the interfacial interaction force between the polyester surface and a copper foil is increased, and the adhesive force between the polyester surface and the copper foil is improved; neopentyl glycol is introduced into a modified copolyester molecular chain, so that the regularity of polyester is further destroyed, the crystallinity and the melting point of polyester are reduced, the film is easier to soften or partially melt when in contact with a copper foil, the contact area between the film and the copper foil is increased, mutual diffusion between the film and the copper foil is increased, and the bonding strength between the film and the copper foil is improved.

The invention discloses a sulfonate grafted polyether-polyester-polyamide block copolymer and a synthesis method thereof, and belongs to the field of materials. The invention provides a block copolymer elastomer material taking polycaprolactam as a hard segment and polyether and polyester as soft segments, and specific sulfonic acid groups are introduced to meet specific applications. According to the invention, caprolactam, 6-aminocaproic acid, aliphatic dibasic acid, aliphatic diamine, polyether glycol, sulfonate grafted polyester polyol BY-3305 and the like are used as raw materials, and macromolecular sulfonate grafted polyester polyol BY-3305 is used as a sulfonate grafting agent, so that the reaction efficiency is higher than that of a small molecular monomer containing a sulfonic acid group, and fewer reaction byproducts are generated; the polymerization reaction can be smoothly carried out. The sulfonate grafted polyether-polyester-polyamide block copolymer elastomer is obtained through one-step melt polymerization, and has the advantages of being simple and convenient in synthesis method, low in production cost, high in strength, adjustable in performance and the like.

The invention discloses an isosorbide-based heat-resistant yellowing-resistant biodegradable polyester and a preparation method thereof.The preparation method comprises the following steps that under the condition of an esterification catalyst, dibasic acid and dihydric alcohol are subjected to an esterification reaction, the dibasic acid is composed of terephthalic acid and 1, 1-cyclohexanedicarboxylic acid, and the dihydric alcohol is composed of 1, 1-cyclohexanedicarboxylic acid; the dihydric alcohol is composed of isosorbide and aliphatic dihydric alcohol; after the esterification reaction is finished, adding a polycondensation catalyst, a stabilizer and a toner into an esterification reaction product to carry out polycondensation reaction; after the polycondensation reaction is finished, the polycondensation product is subjected to bracing and grain-sized dicing, and the isosorbide-based heat-resistant and yellowing-resistant biodegradable polyester is obtained. 1, 1-cyclohexanedicarboxylic acid is introduced to replace part of terephthalic acid, aromatic ring structures on polyester chains are reduced, the yellowing resistance of polyester is improved, meanwhile, biomass-sourced isosorbide is added as a heat-resistant modified component, and the isosorbide-based heat-resistant and yellowing-resistant biodegradable polyester is obtained through a direct esterification method.

The invention relates to a high-toughness low-melting-point nylon resin and a preparation method and application thereof, the high-toughness low-melting-point nylon resin is mainly prepared from the following components: long carbon chain binary acid, long carbon chain diamine, ether bond-containing amino acid, a catalyst and an end-capping reagent, and water is used as a reaction medium. The preparation method comprises the following steps: (1) adding long-carbon-chain dibasic acid, long-carbon-chain diamine and water into a reaction kettle, and stirring at room temperature to form salt; and (2) adding amino acid containing ether bonds, a catalyst and an end-capping reagent, replacing air in the reaction kettle with inert gas, introducing the inert gas, carrying out condensation polymerization reaction, introducing the inert gas, and discharging to obtain the product. The high-toughness low-melting-point nylon resin is applied to the technical field of automobile oil pipes, water pipes or energy storage equipment hoses. The high-toughness low-melting-point nylon resin is high in toughness, low in melting point, low in water absorption rate, diversified in product and easy to process. The product obtained by the method is few in by-products, simple in production process and suitable for industrial continuous production.

The invention provides polyurethane ink resin as well as a preparation method and application thereof. The polyurethane ink resin is prepared from the following raw materials in parts by mass through reaction: 18 to 34 parts of polyester polyol, 2 to 8 parts of isocyanate, 0.3 to 6 parts of amine chain extender and 0.05 to 5 parts of end-capping reagent. The polyester polyol is formed by polycondensation of dihydric alcohol and dibasic acid; the dihydric alcohol comprises dimer alcohol. In the polyurethane ink resin provided by the invention, the dihydric alcohol for preparing the polyester polyol comprises the dihydric alcohol, and the dihydric alcohol is a macromolecule and usually contains a non-polar chain segment, so that the molecular polarity of the polyurethane ink resin can be changed, the polarity difference between the polyurethane ink resin and the solvent-free glue is increased, and the structural similarity between the polyurethane ink resin and the solvent-free glue is reduced; therefore, the ink dissolution resistance of the polyurethane ink resin to solvent-free glue can be improved, and the pigment dispersity and covering performance of the ink and the adhesive force of the ink to a base material can be further improved.

The invention discloses polyester for melt-blowing and a filtering manufacturing method thereof, and belongs to the field of high polymer materials. The raw materials of the polymer polyester contain aliphatic dibasic acid glycol ester, the intrinsic viscosity of the polyester is 0.45-0.6 dL.g <-1 >, and the melting point of the polyester is 190-230 DEG C. The modified PET melt-blowing polyester material is obtained, a melt-blowing non-woven fabric prepared from the material has high mechanical strength and filtering performance at the same time, complex procedures needed by a traditional spunbond cloth / melt-blowing cloth / spunbond cloth (SMS) method for preparing a PET / PP filtering material are reduced, the technical difficulty and the production cost are reduced, and the method is suitable for large-scale popularization and application. And meanwhile, the filtering material is simple-substance, so that the recovery and cyclic utilization of a filtered product are facilitated.

The invention discloses high-strength corrosion-resistant unsaturated polyester resin and a preparation method thereof, and belongs to the technical field of unsaturated polyester resin. The high-strength corrosion-resistant unsaturated polyester resin is prepared from the following components in percentage by mass: 4 to 5 percent of isophthalic acid, 6.5 to 8 percent of terephthalic acid, 7.5 to 8.4 percent of phthalic anhydride, 18 to 18.5 percent of maleic anhydride, 19 to 20 percent of diethylene glycol, 0.007 to 0.015 percent of a catalyst, 0.02 to 0.03 percent of an antioxidant, 9.5 to 10.5 percent of propylene glycol, 0.018 to 0.025 percent of a polymerization inhibitor, 0.015 to 0.03 percent of paraffin and 31.7 to 32.94 percent of a cross-linking agent. The mass ratio of the terephthalic acid to the isophthalic acid is (1.3-2.0): 1, and the mass ratio of the phthalic anhydride to the isophthalic acid is (1.6-2.05): 1. By optimizing the proportion of the binary acid and adding a proper amount of phthalic anhydride, the crystallinity problem of the terephthalic unsaturated resin can be improved, and the compatibility of the resin to a cross-linking agent is improved; the prepared high-strength corrosion-resistant unsaturated polyester resin has the advantages of high strength, high thermal deformation temperature, high water resistance and high corrosion resistance.

The invention relates to the field of polyester fiber production, and discloses modified copolyester, a preparation method thereof and a polyester fiber product. The modified copolyester contains a structural unit A as shown in a formula (I), a structural unit B as shown in a formula (II) and a structural unit C as shown in a formula (III), wherein R1, R2, R3 and R4 are each independently a C1-C10 alkyl group, and m is a positive integer greater than 3; rI, RII, and RIII are each independently hydrogen or a C1-C10 alkyl group. The preparation method comprises the following step: in the presence of a catalyst, carrying out contact reaction on a binary acid monomer, a dihydric alcohol monomer, a component a with a structure as shown in a formula (I), a component b with a structure as shown in a formula (II) and a component c with a structure as shown in a formula (III). The modified copolyester fiber material has good softness and crease resistance, the wearability of a polyester fiber product can be effectively improved, and the diversity and functionality of the polyester material are improved. # imgabs0 #

The invention discloses a halogen-free bio-based flame-retardant polyester polyol, which is prepared by mixing sec with monobasic acid and binary acid, the polyester polyol with moderate crosslinking degree can be prepared by using the cyclic structure of sec and the trifunctional hydroxyl structure of sec, and the prepared flame-retardant polyester polyol has excellent performance in a V-0 grade flame-retardant test. The dependence on a toxic flame retardant is also reduced; in addition, the cyclic structure and high nitrogen content of sec-cyan help to form a more compact cross-linked network after the material is formed, the material is endowed with better tensile strength and heat resistance, and mechanical properties and flame retardant effect are both considered. Wherein part of trimethylolpropane can be used for replacing siroc, so that the cost and the performance are both considered. The invention also provides application of the halogen-free bio-based flame-retardant polyester polyol. The halogen-free bio-based flame-retardant polyester polyol and isocyanate are mixed to prepare a polyurethane material.