109results about How to "Excellent heat and oxygen aging resistance" patented technology

The invention discloses a weatherproof and wear-resisting cable sheath material which comprises the following raw materials in parts by weight: 40-60 parts of thermoplastic polyurethane elastomer, 20-30 parts of chloroprene rubber, 20-30 parts of chlorinated polyethylene, 30-45 parts of nano-titanium dioxide/graphene oxide, 10-15 parts of modified nano talcum powder, 20-35 parts of coupling-agent-modified attapulgite, 3-5 parts of activated zinc oxide, 4-9 parts of stearic acid, 10-18 parts of expansible graphite, 3-7 parts of copper oxide, 5-12 parts of ferric oxide, 5-9 parts of coupling-agent-modified ammonium polyphosphate, 3-6 parts of sulfur, 2-3.5 parts of tricresyl phosphate, 0.5-2 parts of oxidic polyethylene, 3.5-4.5 parts of an accelerant TMDT, 2-5 parts of an anti-aging agent, 1-2.8 parts of epoxy flaxseed oil and 1-1.8 parts of triethyl O-acetylcitrate. The weatherproof and wear-resisting cable sheath pipe has the advantages of good weather resistance, high wear resistance, good mechanical property and long service life.

The invention relates to an articulated truck tire tread rubber composition and a preparation method thereof, belonging to the field of tire production. The articulated truck tire tread rubber composition is composed of the following components in parts by weight: 75-100 parts of natural rubber, 0-25 parts of styrene-butadiene rubber, 50-70 parts of small-particle-size highly-structure-reinforced carbon black, 0-15 parts of silica white, 0-10 parts of tear-resistant resin, 0-3 parts of protective wax, 0-4 parts of N-(1,3-dimethyl butyl)-N'-phenyl-p-phenylenediamine, 0-1 part of acetone-diphenylamine high-temperature condensate, 0-3 parts of stearic acid, 0-10 parts of environment-friendly oil, 0-5 parts of phenol formaldehyde resin tackifier, 0-5 parts of zinc oxide, 0-1 part of anti-reversion agent WK-901, 0-5 parts of dispersing agent, 0-2.5 parts of sulfur and 0.5-2.5 parts of N-cyclohexyl-2-benzothiazole sulfenamide. The articulated truck tire tread rubber composition has the advantages of excellent wear resistance, excellent cutting resistance and excellent thermo-oxidative aging resistance, and can adapt to the operating requirements of high wear resistance, high cutting resistance and excellent thermo-oxidative aging resistance for the articulated truck tire tread rubber.

The present invention relates to composite heat resisting antioxidant for polyolefin and its production process and application. The composite heat resisting antioxidant consists of hindered phenol antioxidant 20-75 wt%, phosphate antioxidant 20-75 wt%, and chelating metal component containing at least bisamide-metal ion chelating structure 5-50 wt%, and is prepared through physical mixing and airflow crushing. The composite heat resisting antioxidant is applied in polyolefin product and can raise the ageing resisting performance of polyolefin product, especially greenhouse film, greatly.

The invention provides a cushion for an engine suspension system and a preparation method thereof. The cushion comprises the following rubber materials in parts by weight: 60-80 parts of natural rubber, 20-40 parts of cis-polybutadiene, 5-8 parts of inorganic active agent, 1-3 parts of organic active agent, 1-3 parts of paraffin, 2-3 parts of age resister A, 1-1.5 parts of age resister B, 1-2 parts of heat stabilizer, 1-3 parts of antifatigue, 1-2 parts of silane coupling agent, 5-10 parts of white reinforced material, 10-30 parts of fast compression reinforced material, 30-40 parts of semi reinforced material, 5-10 parts of softener, 1.5-2.0 parts of vulcanizing agent and 1-2 parts of vulcanizing aid. The cushion for an engine suspension system has excellent endurance quality and outstanding heat/oxygen aging resistance and also has remarkable anti-fatigue performance under a dynamic condition.

The invention discloses an organic silicon gel composition for high-power LED (light-emitting diode) packaging, belonging to the field of gel for electronic products. The composition is composed of a component A and a component B, wherein the mass ratio of the component A to the component B is 1:1 when the two components are used and mixed; the component A comprises the raw materials in percentage by weight: 83-94% of vinyl methylphenyl silicone oil, 5-10% of vinylphenyl T resin, 0.5-5% of organic silicon epoxy resin, 0.2-2% of releasing agent and 50-500ppm of platinum catalyst; and the component B comprises the raw materials in percentage by weight: 96-99% of methylphenyl hydrogen-containing silicone oil, 0.1-1% of antioxidant, 0.1-2% of silane coupling agent, 0.001-0.1% of inhibitor and 0.1-1% of rheology modifier. In use, the component A and the component B are mixed at 25-50 DEG C and need to be used up within 6 hours. The composition is used for packaging of high-power LEDs for illumination, and is suitable for preparation of fluorescent powder in white light LED packaging.

The invention discloses a hybrid filler load type anti-aging agent, and a preparation method and application thereof. The method comprises the following steps that (1) hybrid fillers and a silane coupling agent are mixed; stirring reaction is performed for 10 to 24h at 70 to 90 DEG C; after drying, an intermediate product is obtained; (2) the intermediate product in the step (1) and N-phenyl p-phenylenediamine (RT) are mixed; stirring reaction is performed for 8 to 12h at 50 to 70 DEG C; after drying, the hybrid filler load type anti-aging agent is obtained. The hybrid filler load type anti-aging agent can obviously reduce the volatile migration phenomenon of micromolecule anti-aging agents in a rubber base body, has a better anti-aging effect than that of an ordinary ammonia anti-aging agent 4010NA, and has wide application prospects in the field of rubber.

The invention belongs to the technical field of rubber chemical modification, and relates to a preparation method and a use of a modified nature latex. The modified nature latex is prepared from the following components by weight: 100 parts of nature latex, and 10-30 parts of sericin grafted aqueous polyurethane emulsion. According to the present invention, the modified rubber has advantages of surface functionalization, good biocompatibility and the like; the mechanical property and the allergy of the nature latex gloves are improved; and the traditional method that the protein removing method is adopted to solve the allergy of the latex product is changed, the allergy problem is solved without reduction of the protein content, and the physical and mechanical properties of the latex product are ensured.

The invention discloses a preparation method of a heat-resistant oxygen-resistant polyester film. The preparation method is characterized by including the steps of preparation of hydroxy thiophenol containing compounds, preparation of sulfur-containing hindered phenol antioxidants, polyester synthesis and film processing. The preparation method includes: using 4-hydroxy benzyl thiophenol sodium, 1, 3, 5-trichlorobenzene, 1, 3, 5-tribromobenzene and 2, 4, 6-tri(4-hydroxy benzyl thiophenyl)-1, 3, 5-triazine to synthesize the hydroxy thiophenol containing compounds, namely, 1, 3, 5-tri(4-hydroxy benzyl thiophenyl) benzene and 2, 4, 6-tri(4-hydroxy benzyl thiophenyl)-1, 3, 5-triazine in N, N-dimethyl formamide solvent; synthesizing the 1, 3, 5-tri(4-hydroxy benzyl thiophenyl) benzene, the 2, 4, 6-tri(4-hydroxy benzyl thiophenyl)-1, 3, 5-triazine and 3, 5-di-tert-butyl-4-hydroxy phenylacrylic acid methyl ester to prepare the type A reactive sulfur-containing hindered phenol antioxidant and the type B reactive sulfur-containing hindered phenol antioxidant; and synthesizing the type A reactive sulfur-containing hindered phenol antioxidant, the type B reactive sulfur-containing hindered phenol antioxidant, terephthalic acid and ethylene glycol to prepare heat-resistant oxygen-resistant polyester resin, so that the heat-resistant oxygen-resistant polyester film good in performance is prepared.

The invention discloses a thermoplastic resin composition, which comprises the following components in parts by weight: 5 to 60 parts of polyamide resin, 1 to 10 parts of polyol, and 0.5 to 79 parts of compound containing carbonyl group; on the basis of the total weight of the compound containing carbonyl group, according to the GB/T6324.5-2008 or element analysis method, the measured carbonyl group content is in a range of 10 to 70 wt%, the preferable content is 25 to 60 wt%, and the more preferable content is 30 to 50 wt%. According to the provided preparation method, a compound with a certain ratio of carbonyl group is added to prepare the thermoplastic resin composition; compared with the conventional thermoplastic resin composition, which only contains a specific amount of polyol, the prepared thermoplastic resin composition has an excellent performance on resisting thermo-oxidative aging, wherein the performance is represented by the tensile strength retention rate after thermo-oxidative aging; the provided thermoplastic resin composition is exposed in an environment cabinet with a humidity of 85% and a temperature of 85 DEG C for seven days, the phenomenon of precipitation and whitening does not appear; while conventional thermoplastic resin composition that does not contain the compound containing carbonyl group easily transfers to the surface of mould parts namely precipitation and whitening, and the provided thermoplastic resin composition avoids the phenomenon mentioned above.

The invention discloses a method of preparing ethylene propylene diene monomer (EPDM) graft polymer through solution grafting copolymerization and an application thereof in the preparation of engineering plastics. The method optimizes and improves the preparation method on the basis of the solution grafting copolymerization preparation of EPDM-g-SAN, introduces polar monomer MMA, synthesizes EPDM-g-MAN or EPDM-g-MAS which has less content of AN unit of the graft chain, on the condition of low AN dosage; in addition, the highest monomer conversion rate of the method can reach 70-95% by adjusting the monomer proportioning so as to increase the grafting rate and grafting efficiency of the grafting copolymerization system and significantly improve the compatibility between EPDM graft polymer and SAN resin and the toughening efficiency of EPDM graft polymer to SAN resin. By mixing the EPDM graft polymer prepared in the invention and SAN resin, impact resistance engineering plastics with excellent weather resistance, aging resistance and yellowing resistance and high glossiness can be prepared.

The invention discloses bis-secondary amine containing siloxane groups and a preparation method and application of the bis-secondary amine. The bis-secondary amine containing the siloxane groups is obtained by Michael addition reaction of one or more bis-primary amines and siloxane containing unsaturated double bonds. A B component of spray polyurea is prepared by mixing the bis-secondary amine and an auxiliary agent, an isocyanate prepolymer generated by reaction of polyether polyol and isocyanate is taken as a component A, and the component A and the component B are mixed and sprayed according to the volume ratio of the components A and B of 1 : 1 to obtain a polyurea material. Two active hydrogens of the bis-secondary amine can react with the isocyanate to generate linear polyurea, andthe siloxane groups can be hydrolyzed to generate Si-O-Si cross-linking points, so that the cross-linking speed of the amine and the isocyanate is reduced and the mechanical properties of the polyureamaterial are improved.

The invention relates to a composition for preparing an ultrahigh molecular weight polyethylene pipe material. The composition is prepared from the following raw materials: ultrahigh molecular weight polyethylene, a fluorine-containing polymer processing aid, polyethylene wax, a calcium stearate/zinc stearate compound, a compound antioxidant and carbon black according to the corresponding mass ratio of 100:0.01-0.05:2-6:0.1-1.0:0.2-0.4:1-3; wherein the viscosity average molecular weight of the ultrahigh molecular weight polyethylene is 200*10<4>-300*10<4>; the fluorine-containing polymer processing aid is a fluorinated copolymer of vinylidene fluoride; the mass ratio of the calcium stearate to zinc stearate is 1-3:1; the compound antioxidant is a mixture of (A) a hindered phenol antioxidant and (B) a phosphite ester antioxidant according to the mass ratio of A:B = 1:1-3. According to the formula, the ultrahigh molecular weight polyethylene pipe composition has excellent thermal oxidative aging resistance, is higher than 4530 min in oxidizing induction time at 200 DEG C, and has excellent mechanical performance, wear-resisting property, corrosion resistance, thermal oxidative aging resistance and extrusive processability.

The invention discloses a glass fiber reinforced nylon material for an engine intake manifold and a preparation method thereof. The glass fiber reinforced nylon material comprises the following raw materials: 20-40 parts of nylon resin No. 1, 20-40 parts of nylon resin No. 2, 30-35 parts of glass fibers, 0.5-1 part of a coupling agent, 0.2-0.5 part of a main antioxidant, 0.2-0.5 part of an auxiliary antioxidant, 0.2-0.5 part of a heat stabilizer, 3-5 parts of metal microbeads, 0.1-0.3 part of a nucleating agent, 0.3-0.8 part of a lubricant, 1.0-1.5 parts of a hydrolysis-resistant agent, 0.5-2.5 parts of epoxy resin and 1-2 parts of black masterbatch. The invention also discloses the preparation method for the above-mentioned nylon material. According to the invention, the epoxy resin is adopted for coating pretreatment of the metal microbeads, and the metal microbeads flow onto the surface of the material during the subsequent processing of the nylon material, thereby improving the gloss of the obtained product and reducing the phenomenon of emergence of glass fibers on the surface. Thus, the prepared intake manifold has a smooth surface and good use performance.

The invention discloses a glass fiber reinforced polypropylene composite material with high thermo-oxidative aging resistance and a preparation method of the glass fiber reinforced polypropylene composite material. The glass fiber reinforced polypropylene composite material is prepared from components in parts by weight as follows: 70-80 parts of polypropylene homopolymers, 20-30 parts of glass fiber, 4-6 parts of a compatilizer, 0.5-0.8 parts of zinc oxide and 0.6-1 part of an antioxidant, wherein the compatilizer is one of CMG9801, BONDYRAM 1001 or KT-1. By addition of the compatilizer, zincoxide and the antioxidant to the glass fiber reinforced polypropylene composite material and adoption of a reasonable ratio, weather resistance of the material can be substantially improved, and prepared glass fiber reinforced polypropylene has higher performance retention rate after thermo-oxidative aging and is suitable for certain places with relatively strict requirements for the thermo-oxidative aging.

The invention provides a functionalized unimodal radial block copolymer and its preparation method whose structure is illustrated by formula AYB#-[3]-(B#-[2]-S#-[3])B#-[1]/S#-[2]-S#-[1]}#-[3]}#-[n], wherein S is styrene single vinyl aromatic hydrocarbons, B is butadiene conjugated diolefin, Y=Si, Sn, n=1, 2, A is hydrocarbon radical with hydroxy, imino, benzene imino, mercapto functional group or polymer chain P.

The invention discloses a modified natural rubber composite material for a cable insulation layer. The material is prepared from the following raw materials in parts by weight: 30 to 40 parts of natural rubber, 40 to 60 parts of methyl methacrylate natural rubber, 50 to 60 parts of ethylene propylene diene monomer, 50 to 55 parts of nanosilicon dioxide, 16 to 20 parts of diatomite, 7 to 12 parts of nylon PA-66, 12 to 16 parts of calcined clay, 33 to 37 parts of white carbon black, 15 to 25 parts of carbon black, 30 to 45 parts of attapulgite, 2 to 3 parts of zinc oxide, 1.8 to 2.5 parts of sulphur, 2 to 4 parts of N-cyclohexyl-2-benzothiazole sulfenamide, 1 to 2 parts of bis(3-triethoxysilicyl propyl)-tetrasulfide, 2.5 to 3 parts of magnesium stearate, 5 to 10 parts of maleic anhydride and 2 to 5 parts of liquid carboxylated nitrile rubber. According to the modified natural rubber composite material for the cable insulation layer, provided by the invention, the cable insulation layer adopts the modified natural rubber composite material, the oxidation and heat resistant properties are good, the ageing-resistant performance is excellent, the mechanical property is good and the service life is long.