Abstract: The present invention discloses a polyester, a preparation method therefor and use thereof. The polyester includes repeating units derived from the following components: a first component A, based on the total molar weight of the first component A, including: a1) 81-100 mol % of succinic acid, or an ester derivative thereof or an anhydride derivative thereof, and a2) 0-19 mol % of a dicarboxylic acid other than succinic acid, or an ester derivative thereof or an anhydride derivative thereof; a second component B: 1,4-butanediol; and a third component C: a dimer(1,4-butanediol); based on the total molar weight of the first component A, the molar content of the repeating unit —CH2CH2CH2CH2—O— in the third component C is 0.05-3.0 mol %. In the present invention, the molar content of the repeating unit —CH2CH2CH2CH2—O— in dimer(1,4-butanediol) is controlled to 0.05-3.0 mol %, and thus, the resin color of the polyester can be effectively improved.

Abstract: The invention discloses a flame-retardant semi-aromatic polyamide derived from the following monomers: a diacid monomer A: where A1 is terephthalic acid or terephthalic acid and other diacid, terephthalic acid accounts for 50 to 100 mol % of A1, and A2 is [(6-oxido-6H-dibenzo-(c,e)(1,2)-oxaphosphorin-6-ketone)-methyl]-butanedioic acid, A1+A2=100 mol %, A1=90 to 99 mol %, A2=1 to 10 mol %; and diamine monomer B: one or more of diamine monomers containing 4 to 36 carbon atoms. In the present invention, by an in situ polymerization, a specific flame-retardant monomer [(6-oxido-6H-dibenzo-(c,e)(1,2)-oxaphosphorin-6-ketone)-methyl]-butanedioic acid is copolymerized in a semi-aromatic polyamide chain segment, excellent mechanical properties and low water absorption can be obtained.

Abstract: Disclosed are a semi-aromatic polyester, and a preparation method therefor and a use thereof. In the present invention, on the basis of the total molar amount of diacid, the molar content of a repeating unit —CH2CH2CH2CH2—O— in dimer(1,4-butanediol) is controlled to be 0.05-0.35 mol %, which can effectively improve the resin color of the semi-aromatic polyester.

Abstract: The present invention relates to a flame-retardant nylon composite and use thereof, including components: 55 parts to 80 parts of a nylon resin; 1 part to 30 parts of a red phosphorus; and 0.01 part to 2 parts of a phenolic substance. According to the present invention, by adding a small amount of the phenolic substance to the red phosphorus flame-retardant nylon composite, phosphorus precipitation can be effectively inhibited, and a phosphine precipitation amount can be reduced to 30 ppm or less, while good electrical performances can be maintained, which is applicable in fields of connectors, contactors, etc. in electronic appliances.

Abstract: The present invention discloses a semi-aromatic polyester, a preparation method therefor and use thereof. The content of hydroxyl in a semi-aromatic polyester is controlled, and particularly, the content of hydroxyl linked to aliphatic dicarboxylic acid in the semi-aromatic polyester is controlled to 17-40 mmol/kg, the content of hydroxyl linked to aromatic dicarboxylic acid in the semi-aromatic polyester is controlled to 17-40 mmol/kg, and the total content of hydroxyl is controlled to 35-80 mmol/kg, such that the compatibility of the semi-aromatic polyester with materials, e.g., polylactic acid can be significantly improved, thereby obtaining a high-strength tear-resistant film material.

Abstract: The present invention provides a PA10T molding composite material that can be used to produce LED display light source reflection supports. The width of the crystallization peak at half maximum ?T1/2 is adjusted to be 3-10° C., the whiteness is adjusted to be less than 26, and the 460 nm light source reflectivity is adjusted to be less than 6.5%, such that the PA 10T molding composite material has the advantages of low blue light, high contrast, and high gray scale, and can satisfy requirements for a packaging process and long-term reliability, and can be used as a packaging product to manufacture high-contrast LED display light source refection supports applicable in multiple scenarios.

Abstract: The invention relates to a PC resin material with a neutral filtering effect, and a preparation method therefor and the use thereof. The PC resin material with a neutral filtering effect provided in the present invention comprises polycarbonate, an antioxidant, a dispersing agent and an additive. The PC resin material with a neutral filtering effect provided in embodiments of the present invention has a flat transmittance curve at a spectral band of 400-1000 nm, a better neutral filtering effect and the advantages of easy machinability and low costs, and can be widely applied to the preparation of optical products.

Abstract: Disclosed is a furan diacid-based polyamide resin, which is derived from the following repeating units: (A) 2,5-furandicarboxylic acid, (B) 1,4-cyclohexanedicarboxylic acid, and (C) 1,10-decanediamine, where based on the total molar percentage of the diacid units, (A) accounts for 5-45 mol % of the diacid units.

Abstract: The present invention discloses a furan diacid-based polyamide, which is derived from the following repeating units: (A) 2,5-furandicarboxylic acid, (B) 1,4-cyclohexanedicarboxylic acid, and (C) 1,5-pentanediamine, where based on the total molar percentage of the diacid units, (A) accounts for 10-45 mol % of the diacid units. The furan diacid-based polyamide of the present invention has a melting point of 291-335° C.

Abstract: The present invention provides a semi-aromatic polyamide molding composite material that can be used for producing an LED display screen light source reflection support. Generally, by selecting a semi-aromatic polyamide resin having a specific repeating unit, and enabling the crystallization peak width at half maximum ?T1/2 to be 4-11° C., the whiteness to be less than 26.5, the reflectivity under a 460 nm light source to be less than 6% etc., the semi-aromatic polyamide molding composite material has the advantages of reduced blue light, high contrast ratio and high gray scale, and can meet requirements for the packaging process and long-term reliability. The package product can be used for manufacturing high-contrast LED display screen light source refection supports for use in multiple environments.

Abstract: An antibacterial polycarbonate composite includes the following components in parts by weight: 100 parts of a polycarbonate, 0.01-5 parts of a nanometer metal oxide, and 0.01-5 parts of a silicon-containing high-molecular polymer; and based on a total weight of the antibacterial polycarbonate composite, a content of a silver ion is 100-1200 ppm.

Abstract: The present invention relates to a semi-aromatic polyether ester, a preparation method therefor and use thereof. The semi-aromatic polyether ester includes repeating units derived from the following components: a first component A, based on the total molar amount of the first component A, including: a1) 35-65 mol %, and preferably 40-60 mol % of at least one aliphatic dicarboxylic acid or an ester derivative thereof, or an anhydride derivative thereof, and a2) 35-65 mol %, and preferably 40-60 mol % of at least one aromatic dicarboxylic acid or an ester derivative thereof, or an anhydride derivative thereof; a second component B: 1,4-butanediol; and a third component C: poly(1,4-butanediol) having a molecular formula of HO—(CH2CH2CH2CH2—O)n—H, where n is an integer from 2 to 200; based on the total molar weight of the first component A, the molar content of the repeating unit-CH2CH2CH2CH2—O— in the third component C is 1.5-5.

Abstract: Disclosed are a polypropylene composite material capable of blasting at a low temperature, and a preparation method therefor and application thereof. The polypropylene composite material comprises the following components in parts by weight: 35-75 parts of special polypropylene A, 3-10 parts of special polypropylene B, 15-30 parts of a filler, 2-10 parts of a special toughening agent, 15-25 parts of a toughening agent, 0.1-0.3 part of a lubricant, 0.1-0.3 part of a photostabilizer, and 0.2-0.6 part of an antioxidant, wherein the special toughening agent comprises ultrahigh molecular weight polyethylene and a metallocene ethylene-propylene copolymer. The polypropylene composite material that is capable of blasting at a low temperature and has good rigidity is prepared by using the special polypropylene A, the special polypropylene B, and the special toughening agent in combination with the normal filler and the normal toughening agent, and the polypropylene composite material has a wide application prospect.

Abstract: Disclosed is a flame-retardant HIPS material and a preparation method thereof, comprising the following components: 90 parts to 67 parts of a HIPS resin; 8 parts to 15 parts of a brominated flame retardant; and 3 parts to 7 parts of an auxiliary flame retardant; wherein the auxiliary flame retardant is a 1,3,5-triazine compound. In the present invention, a synergistic compounding of the brominated flame retardant and the auxiliary flame retardant effectively reduces an amount of the brominated flame retardant, and a stable UL 94 (1.5 mm) V-0 flame-retardant class can be achieved. Compared with the existing brominated flame-retardant HIPS, the present invention has a low halogen content, low gas, and high cost performance ratio, which avoids excessive acid gas from forming air lines on the surface of parts, has a good appearance.

Abstract: Provided is a laser marking shading enhanced PBT composition, comprising, in parts by weight, the following components: 50-80 parts of a PBT resin, 6-20 parts of an opacifying agent, 15-30 parts of fiberglass, 0.1-0.5 parts of an antioxidant, and carbon black accounting for 0.0033-0.033% of the weight of the opacifying agent. In the present invention, when performing compounding with only an opacifying agent and a trace amount of carbon black without the use of an expensive laser marking agent, the composition has the properties of a whiteness value of more than 90, a shading of less than 3 mm, and a color difference value of more than 15 before and after laser marking. Therefore, the composition can be applied in the field of preparing lamp cup housings, capacitors, connectors, or relay articles in the lighting industry.

Abstract: The present invention provides a polycarbonate alloy including the following components in parts by weight: 50 parts to 80 parts of a polycarbonate; 1 part to 50 parts of a crystalline polyester; 0.01 part to 4 parts of a maleic anhydride polymer; and 0.01 part to 4 parts of a metal phosphate. The polycarbonate alloy of the present invention has advantages of good alloy stability, and a continuous and uniform distribution of the crystalline polyester in the alloy.

Abstract: A recycling process for a polyamide waste material includes the following steps: adding a polyamide waste material into a mixed solvent to obtain a solution, heating the solution to 50° C. to a reflux temperature of the solution, conducting stirring for dissolution, and then conducting decolorization treatment and filtration to obtain a polyamide solution; and adding the polyamide solution into water, precipitating polyamide as a solid in deionized water, and conducting separation to obtain recycled polyamide. The mixed solvent includes, in parts by weight, 10-30 parts of phenol and 15-40 parts of toluene.

Abstract: The present invention provides a polyamide composite material, which includes the following components in parts by weight: 25-85 parts of a polyamide resin; 10-50 parts of a glass fiber; 5-25 parts of polytetrafluoroethylene; and 0.1-2 parts of at least one of a K/Na/Ca/Mg/Ba/Zn/Li/Al salt of montanic acid. The montanate can effectively inhibit free hydrogen fluoride in the polytetrafluoroethylene, thereby effectively inhibiting free silicon in the glass fiber and improving the electrical performance of the material.

Abstract: Disclosed is a reinforced polypropylene material, comprising in parts by weight: a, 10-90 parts of polypropylene resin, b, 0.5-25 parts of compatilizer, c, 5-60 parts of reinforced fibers and d, 0.1-20 parts of low-hardness toner. The reinforced fibers comprise a component I, a component II and a component III, where the component I is composed of reinforced fibers with a length of 0.1-0.6 mm and accounts for 35-50% of number of reinforced fibers, the component II is composed of reinforced fibers with a length of 0.7-1.3 mm and accounts for 35-45% of number of reinforced fibers, and component III is composed of reinforced fibers with a length of 1.4-2.0 mm and accounts for 5-20% of number of reinforced fibers.

Abstract: Disclosed is a low-odor soft PVC material. The material comprises the following components in parts by weight: 100 parts of a PVC resin, 60-125 parts of a plasticizer, 2-10 parts of a heat stabilizer, 10-50 parts of a filler, 0-2 parts of an antioxidant, 0.02-0.06 parts of a lubricant and 0.5-1 parts of a deodorant. The PVC resin has a degree of polymerization of lower than 1300; and the deodorant comprises nano calcium carbonate and zinc ricinoleate. By selecting a PVC resin with a low degree of polymerization and a deodorant with a high deodorizing efficiency, the low-odor soft PVC material of the present invention reduces odors from the source, has a small overall impact on the appearance and performance of automotive interior parts, and is low in cost and suitable for large-scale production.