31results about How to "Improved thermo-oxidative aging performance" patented technology

The invention relates to a modified polypropylene insulation material and a manufacturing method thereof, and the modified polypropylene insulation material includes the following components by weight part: 70-80 parts of polypropylene resin, 10-15 parts of polyolefin elastomer resin, 10-15 parts of thermoplastic hydrogenation butadiene styrene rubber, 0.5 parts of anti-oxidant A, 0.3 parts of anti-oxidant B, 0.3 parts of an anticopper agent and 0.1 parts of a rheological agent. The manufacturing method includes the following steps: metering the raw materials according to weight parts and putting in a mixer for uniformly mixing, then sending to a double screw extruder for blending and extruding, filtering and drawing into strips, and then cooling through a water tank and drying, putting in a pelleter for cutting into particles, and then packaging to obtain the finished product. The insulation material has the advantages of good performance, good high-and-low temperature performance, high strength and low cost, and is capable of being used in insulation of telecommunication cable, detection cable and oil pump cable; the manufacturing method has the advantages of reasonable design and convenient operation.

The invention discloses a composite material of green environment protective flameproof ABS alloy and making method, which is composed of ABS and PVC, wherein fitful quantity of heat stabilizer and lubricant are added into co-blending system, which improves flameproof property with fire retardant within Sb2O3 and halogen fire retardant; the composite material reinforces extending property, bending property and hinging property, which improves mechanic strength and electric property obviously.

The invention relates to a compatilizer for improving blending compatibility of ethylene propylene diene monomer with silicone rubber. The compatilizer comprises 100 parts of liquid ethylene propylenediene monomer, 30-50 parts of hydrogen-containing silicone oil and 0.5-1 part of a catalyst. The preparation method comprises the following steps: firstly, dissolving the liquid ethylene propylene diene monomer, then adding the hydrogen-containing silicone oil and the catalyst, and carrying out a hydrosilylation reaction to graft the hydrogen-containing silicone oil onto the liquid ethylene propylene diene monomer to prepare the compatilizer. The novel compatilizer can be enriched at the interface of two phases in a blending process of ethylene propylene diene monomer with methyl vinyl silicone rubber, and surface tension of the two phases is reduced through physical or chemical effects generated by the compatilizer with a two-phase polymer component, so that an effect of improving compatibility of the two components is achieved, and performance of blended rubber is improved.

The invention discloses a fused method silica modified silicone rubber composite material. The fused method silica modified silicone rubber composite material is prepared from the following raw materials in parts by weight: 80 to 90 parts of methyl vinyl silicone rubber, 10 to 20 parts of methyl phenyl silicone rubber, 10 to 26 parts of fluorine rubber, 15 to 32 parts of fumed silica, 2 to 10 parts of carbon nanotube, 2 to 9 parts of graphite, 2 to 9 parts of nano-alumina, 5 to 12 parts of boron nitride, 6 to 11 parts of montmorillonite, 0.8 to 1.8 parts of vulcanizing agent, 0.2 to 1.3 partsof methyl silicone oil, 1 to 3.5 parts of methyltriacetoxysilane and 1 to 2.5 parts of tetraethyl orthosilicate. The fused method silica modified silicone rubber composite material provided by the invention has high strength, excellent high-temperature resistance and excellent aging resistance.

The invention discloses a method for synthesizing special resin for a PE100 pipe fitting. The method comprises the following steps: (1) diluting a main catalyst, adding the diluted main catalyst intoa first reactor, adding a co-catalyst, adding hydrogen and ethylene to the first reactor, controlling the reaction temperature, pressure and slurry density, and carrying out a reaction; (2) after theproduct of step (1) is treated by an intermediate to remove hydrogen, adding the treated product into a second reactor, adding hexane, ethylene and hydrogen into the second reactor, wherein the molarratio of the hexane to the ethylene is (0.9-2.0):1, and the molar ratio of the hydrogen to the ethylene is (0.0015-0.0087):1, controlling the reaction temperature, pressure and slurry density, controlling the polymerization reaction block ratio to be 48-50, and continuing the reaction; (3) carrying out extruding granulation on the reaction product in the step (2); and (4) cooling the material strip by cooling water, then cutting the cooled material strip into cake-shaped uniform particles, and carrying out homogenized packaging on the particles to obtain the special resin for the PE100 pipe fitting. The special material meets the standard requirements of PE100.

The invention relates to the technical field of coatings and in particular relates to an environment-friendly polyurethane waterproof coating and a preparation method thereof. The environment-friendly polyurethane waterproof coating comprises components A and B. The component A comprises the following substances in parts by weight: 20-30 parts of polyether glycol, 30-50 parts of polyether triol, 3-6 parts of montmorillonite, 3-6 parts of nano silicon dioxide and 4-7 parts of methylbenzene-2,4-diisocyanate; the component B comprises the following substances in parts by weight: 6-8 parts of water, 0.5-1 part of a dispersant, 8-12 parts of petroleum fraction oil, 3-6 parts of calcium hydroxide, 3-6 parts of talc powder, 3-6 parts of light calcium carbonate and 0.3-0.6 part of a plasticizer. By taking water or other diamines and polyhydric alcohol as a curing agent, the coating does not contain volatile organic compounds, so that the coating is harmless to the environment and has excellent mechanical properties and anti-ageing property.

Provided are a 150 DEG C thermoplastic halogen-free flame-retardant polyolefin thin-wall insulation material and a preparation method thereof. The insulation material comprises the main components in parts by weight: 60 to 70 parts of poly(4-methyl-pentene) resin, 10 to 20 parts of thermoplastic hydrogenated styrene butadiene rubber, 10 to 20 parts of a compatilizer, 50 to 60 parts of a flame retardant, 0.5 part of an antioxidant A, 0.3 part of an antioxidant B, 0.3 part of an anti-copper agent, and 2 parts of a lubricant. The preparation method comprises the steps: after preparing the amounts of the raw materials according to the weight parts, putting into a mixer for mixing evenly, then sending into a twin-screw extruder for co-mixing, filtering, extruding and dragging strips, next cooling with a water tank, drying, allowing to go into a dicing cutter for cutting into particles, and then packaging to obtain the finished product. The insulation material has the advantages of good insulating performance, excellent flame retardance, high temperature resistance, easy processing and low cost, and can be widely used in thin-wall insulation of communication cables, locomotive vehicle wire cables and automobile wires; and the preparation method is reasonable in design and simple in operation.

The present invention relates to a muffler, the muffler includes a hollow cylindrical muffler net and a casing wrapping the muffler net, muffler cotton is arranged between the casing and the muffler net, the casing, the muffler cotton and the muffler net are arranged in parallel, the muffler further comprises a mounting member arranged on two ends of the muffler net, a mounting through hole is arranged in the middle part of the mounting member, the upper end face of the mounting member is provided with a cutting face, muffler net holes are arranged on the middle part of the lower end face of the mounting member, the muffler net holes and the mounting through hole can be coaxially arranged, the muffler net can be clamped and embedded by the muffler net holes, a casing groove capable of clamping and embedding the casing is dug on the outer side face of the mounting member, and the casing is made of a composite material which comprises, 40-50wt% of epoxy; 5-20wt% of alkali-free glass fiber; 15-30wt% of mineral fiber; 0.5-5wt% of a flow modifier; 1-3wt% of a heat modifier; 3-5wt% of a compatibilizer; 0.3-0.5wt% of a primary antioxidant; 0.3-0.5wt% of a secondary antioxidant and 1-3wt% of a processing aid. The muffler is simple in structure, the casing is made of the composite material, the mounting member is made of a reasonable compatibility material, and the use efficiency and the service life of the entire blast blower can be further improved.

The invention discloses an ultrahigh-temperature polyimide heat-conducting insulating material and a preparation method thereof, and belongs to the field of high polymer materials. The ultrahigh-temperature polyimide heat-conducting insulating material comprises the following raw materials in parts by mass: 100 parts of reactive polyimide resin, 5-20 parts of a heat-conducting filler, 3-5 parts of a repairing agent, 0.5-3 parts of an anti-aging agent, and 1-10 parts of a reactive diluent. According to the preparation method of the ultrahigh-temperature polyimide heat-conducting insulating material, reactive polyimide resin is taken as a base material, the heat-conducting filler, the repairing agent, the anti-aging agent and the reactive diluent are added, a modified resin system is prepared by adopting a melt blending process, an insulating material system with the glass transition temperature being greater than 350 DEG C, the initial thermal decomposition temperature being greater than 500 DEG C, the heat conductivity coefficient being greater than 0.3 W/m.K, the electric breakdown strength being greater than 80kV/mm and the thermal expansion coefficient being less than 40PPM/DEG C is obtained by means of program temperature controlled curing, the excellent performance of the insulating material system meets the use requirements of sealing and insulation of special motor stator electromagnetic wire windings, and the material has a wide application prospect in the technical field of heavy oil thermal recovery.

The invention relates to a high-content glass fibre-enhanced nylon 66 composite material and a preparation method thereof, and belongs to the field of high polymer materials. The composite material isprepared from the following components in percentage by mass: 31.9 to 38 percent of nylon 66, 58 to 62 percent of alkaline-free glass fibres, 2 to 5 percent of a compatilizer, 0.3 to 0.5 percent of amain antioxidant, 0.3 to 0.5 percent of an auxiliary antioxidant and 0.5 to 1.0 percent of a lubricating agent, wherein the surfaces of the alkaline-free glass fibres are coated with an enhancement layer; the enhancement layer is made of carbon nano-tubes or silicon carbide nano-tubes which are extruded and granulated by using a twin-screw extruder. The composite material provided by the invention is high in glass fibre content; the mechanical properties and the physical properties of the composite material are improved; moreover, the surfaces of the alkaline-free glass fibres are coated withthe nano-tubes; the compatibility of the alkaline-free glass fibres and the nylon 66 is increased by selecting suitable lengths and diameters of the glass fibres and the molecular weight of the nylon66; the defect that the appearance of the material becomes poor along with the increment of the content of the glass fibres filled in the nylon in the past is overcome.

The invention discloses modified boehmite butadiene styrene rubber. The modified boehmite butadiene styrene rubber is prepared from the following raw materials in parts by weight: 65-68 parts of butadiene styrene rubber, 30-33 parts of silicon nitride rubber, 6-9 parts of a styrene-butadiene-styrene segmented copolymer (SBS), 1.5-1.8 parts of an aluminum-zirconium coupling agent TL-5, 2-5 parts of 2,5-dimethyl-2,5-bis(tert-butylperoxyl)hexane, 4.3-4.7 parts of sulfur, 1-2 parts of divinyl benzene, 33-36 parts of modified boehmite, 8-11 parts of zeolite powder, 18-21 parts of precipitation barite, 3-4 parts of trioctyl trimellitate, 5-8 parts of epoxidized soybean oil, 17-20 parts of magnesium hydroxide, 2.5-3 parts of melamine phosphate, 1-1.5 parts of an environment-friendly flame retardant FR-T801, 1.3-1.6 parts of an antioxidant MBZ (2-Mercaptobenzimidazole Zinc), and 1.8-2.1 parts of an antioxidant BLE (high temperature condensation compound of diphenylamine and acetone).