42results about How to "Excellent high and low temperature impact resistance" patented technology

The invention provides an ultraviolet light polymerization adhesive and a preparation method thereof. The ultraviolet light polymerization adesive is prepared from the following components in parts by weight: 236-385 parts of polyurethane acrylate, 0.82-1.35 parts of polydimethylsiloxane mercapto acrylate, 43-82 parts of a monofunctional reactive diluent, 72-105 parts of a polyfunctional reactive diluent, 11.8-19.3 parts of a photoinitiator, 0.46-0.84 part of an ultraviolet light absorbent, 0.92-1.78 parts of a leveling agent, 1.03-1.92 parts of a foam killer and 0.48-0.86 part of a silane coupling agent. The ultraviolet light polymerization adhesive provided by the invention has better high-temperature impact resistance and excellent adhesion, has no cyano group, and is environment-friendly and nontoxic.

The invention discloses a high-initial-adhesion-strength moisture-curable polyurethane hot melt adhesive and a preparation method thereof. The adhesive is prepared from the following raw materials inparts by weight: 20-50 parts of polyether polyol, 10-40 parts of crystalline polyester polyol, 5-30 parts of liquid polyester polyol, 10-20 parts of polyisocyanate, 10-35 parts of thermoplastic acrylic resin, 2-15 parts of tackifying resin, 0.1-0.5 parts of a catalyst and 0.1-1 part of an antioxidant. The moisture-curable polyurethane hot melt adhesive provided by the invention has the advantagesof long opening time, high initial adhesion strength, high curing speed, higher final adhesion strength, favorable damp-heat resistance and favorable high/low-temperature impact resistance, and can achieve the goals of no pressure maintaining and high-efficiency production of electronic products.

The invention relates to an antenna housing and provided a combined antenna housing. The combined antenna housing comprises an arc-shaped housing body (1) and a steel base (2) in a hollow cylindrical structure, wherein the steel base (2) is located on the lower portion of the arc-shaped housing body (1), and the arc-shaped housing body is in a sandwiched composite structure. Compared with existing products, the combined antenna housing has the advantages of being good in electromagnetic permeability and high and low temperature shock resistance and capable of protecting antennas to be used in severe weather such as sand, high wind and humid rainy climate and in regions with large temperature differences.

A polyarylene sulfide-derived resin composition which has flowability optimal for insert molding and which can impart superior high- and low-temperature impact properties to a molded body, and an insert-molded body using the resin composition. The resin composition includes a polyarylene sulfide resin having carboxylic terminal groups, an olefin-derived copolymer, glass fibers and calcium carbonate. The weight-average molecular weight of the polyarylene sulfide resin is 15,000-40,000; as copolymerization components, the olefin-derived copolymer includes α-olefins, glycidyl esters of α,β-unsaturated acids, and acrylic esters, and the content of the copolymerization component derived from the glycidyl esters in the resin composition is 0.2-0.6 mass %. Further, the fiber diameter of the glass fibers is 9-13 μm, the average particle diameter of the calcium carbonate is 10-50 μm, and the total content of glass fibers and the calcium carbonate is 45-55 mass % of the resin composition.

The invention provides a thermoplastic resin composition. The thermoplastic resin composition comprises the following components in parts by mass: 50-85 parts of thermoplastic polyurethane resin, 5-20 parts of saturated polyester resin, 0.5-8 parts of a compatilizer, 0.1-1 part of an antioxidant and 20-100 parts of a flame retardant, wherein the thermoplastic polyurethane resin has excellent flexibility and high and low temperature resistance; and the saturated polyester resin has low melting point, poor high temperature resistance, good aging property and excellent adhesive property with metal and an insulation film. The thermoplastic polyurethane resin and the saturated polyester resin are blended and modified, a small amount of the compatilizer is added, polymer alloy with excellent compatibility can be obtained, and the polymer alloy has good high and low temperature impact property, aging property and adhesive property. The resin composition does not contain a curing agent, has good high temperature liquidity and can meet low temperature lamination requirements. The invention also provides an adhesive made by adopting the thermoplastic resin composition, an insulation adhesive film used for a laminated bus bar and a preparation method of the insulation adhesive film.

The invention relates to low-temperature-resistant insulation resin for a motor and a preparation method thereof. The insulation resin is prepared from the following ingredients in parts by weight: 100 parts of an epoxy resin composition, 90 to 120 parts of an anhydride curing agent and 0.1 to 0.4 part of a latent accelerator, wherein the epoxy resin composition is a mixture consisting of 20 to 30 parts of bisphenol F epoxy resin, 20 to 40 parts of hyperbranched epoxy resin, 10 to 25 parts of polyfunctional glycidyl amine epoxy resin and 10 to 20 parts of acrylic acid modified organosilicone epoxy resin. The epoxy resin composition, the anhydride curing agent and the latent accelerator according to a specific recipe are used to take a reaction; the molecular chain intensity improvement and the heat-resistant performance improvement are facilitated; the external load is born; the stress concentration is relieved, so that good high-temperature and low-temperature impact resistance performance is realized; the viscosity of the resin is effectively reduced; the insulation treatment of the motor is facilitated.

The invention relates to a flame-retardant antistatic random copolymerization polypropylene composition, which includes a basic random copolymerization polypropylene resin, a fire retardant and a conductive filling material. The basic random copolymerization polypropylene resin includes a random copolymerization polypropylene continuous phase and a propylene-ethylene copolymer rubber disperse phase, wherein the random copolymerization polypropylene continuous phase at least comprises first random copolymerization polypropylene and second random copolymerization polypropylene, which are independently selected from propylene/ethylene random copolymer, propylene/butylene random copolymer and propylene/ethylene/butylene ternary random copolymer. The content of a xylene soluble substance of basic random copolymerization polypropylene resin at the room temperature is more than 10 wt% and less than 35 wt%. The ratio of Mw of a trichloro-benzene soluble substance to Mw of a trichloro-benzene insoluble substance is more than 0.4 and less than 1. The invention further relates to a pipe made from the composition and a preparation method.

The invention provides a flame-retardant resin composition, which comprises the following components in parts by mass: 50 to 110 parts of a saturated polyester resin, 15 to 40 parts of a polyurethane resin, 5 to 20 parts of a curing agent, 30 to 200 parts of a flame retardant, 0.01 to 1 part of an antioxidant and 0.01 to 5 parts of a coupling agent. A small amount of polyurethane resin is added into the flame-retardant resin composition, and then carboxy groups can be introduced into the flame-retardant resin composition to increase functional groups capable of performing a crosslinking reaction with the curing agent in the flame-retardant resin composition and improve the crosslinking density of the flame-retardant resin composition, so that the heat resistance of the flame-retardant resin composition is improved. Moreover, the carboxy groups in the polyurethane resin and hydroxyl groups in the saturated polyester resin can both perform a crosslinking reaction with the curing agent, and an interpenetrating polymer network can be formed after curing, so that the compatibility of the polyurethane resin and the saturated polyester resin is improved. The invention also provides an adhesive and laminated busbar insulating adhesive film prepared from the flame-retardant resin composition, and a preparation method for the laminated busbar insulating adhesive film.

The invention provides a composition used for preparing a polypropylene foaming material. The composition comprises high melt-strength anti-punching polypropylene as a base resin, the high melt-strength anti-punching polypropylene comprises a propylene homopolymer ingredient and a propylene-ethylene copolymer ingredient, and is characterized in that the molecular weight distribution Mw/Mn is less or equal to 10, and is greater or equal to 4; Mz+1/Mw is greater than 10 and less than 20; the content of a room-temperature xylene soluble substance is greater than 10 wt% and less than 30 wt%; and the ratio of a room-temperature trichloro-benzenes soluble substance Mw to a room-temperature trichloro-benzenes insoluble substance is greater than 0.4 and less than 1. The invention also provides a polypropylene injection foaming formed body produced by the composition through injection foaming and a preparation method thereof, and the formed body is suitable for the fields with special requirements on the part shapes such as automobile, aircraft, and high-speed rail internal and external decoration.

The invention discloses a high-wettability environment-friendly three-proofing adhesive and a preparation method thereof, and belongs to the field of adhesives. A self-made ultraviolet light and moisture dual-curing organosilicon acrylic prepolymer is synthesized, and the molecular structure of the prepolymer has two double-bond groups and two isocyanate groups, so that the resin can be subjected to rapid cross-linking polymerization reaction under UV and moisture conditions respectively to form a compact adhesive layer, and the problem of ultraviolet light and moisture dual curing is solved. According to the present invention, the polysiloxane is introduced into the main chain of the prepolymer, such that the prepared three-proofing adhesive has low surface tension, and the silicon-oxygen bond in the main chain provides excellent flexibility so as to provide excellent high and low temperature impact resistance.

The invention relates to the technical field of high-temperature-resistant silica gel and particularly discloses a dual-component silica gel material and a preparation method and application thereof. The dual-component silica gel material is prepared from a component A and a component B. The component A is prepared from vinyl silicon oil, hydrogen containing silicone oil, an inhibitor, ceramic powder and antioxygen. The component B is prepared from vinyl silicon oil, a tackifying agent, a catalyst, ceramic powder and antioxygen. The raw materials of the component A and the raw materials of the component B are placed in stainless steel or ceramic lined tanks according to the mass ratio to be mixed and stirred and ground and dispersed through a ceramic three-roller grinding machine, heavy paste A and heavy paste B are prepared, the heavy paste A and the heavy paste B are mixed according to the mass ratio of 1:1 during use, the curing temperature ranges from 150 DEG C to 200 DEG C, and curing time ranges from 1 h to 2 h. The product is used for binding and sealing of ceramic heating sheets and aluminum sheets of a PTC heater, the heat-resistant performance and binding performance of the PTC heater are improved, the service life is prolonged, production cost is reduced, and the material is suitable for large-scale production.

The invention discloses SiC crystal whisker enhanced Sn-Bi series solder which comprises the following components in part by weight: 3-6 parts of SiC crystal whisker and 40-80 parts of Sn-Bi series microalloy powder, wherein the Sn-Bi series microalloy powder comprises the following components in percentage by mass: 35.9-57.5% of Bi, 0.3-0.6% of In, 0.01-0.05% of Cu, 0.005-0.009% of Zn, 0.001-0.003% of Pt, 0-0.003% of Y, 0.001-0.005% of Ce, 0.0005-0.0009% of Cd, 0.0001-0.0005% of Co and the balance of Sn and unavoidable impurities. The invention further discloses a preparation method of the SiC crystal whisker enhanced Sn-Bi series solder. The SiC crystal whisker enhanced Sn-Bi series solder prepared through the preparation method disclosed by the invention has high wettability to a matrixand has high mechanical performance.

The invention provides a high-melt-strength anti-impact polypropylene foamed board and a preparation method thereof. The foamed board is prepared with high-melt-strength anti-impact polypropylene serves as matrix resin through foaming and rolling. The high-melt-strength anti-impact polypropylene is composed of a propylene homopolymer component and a propylene-ethylene copolymer component and has the characteristics that molecular weight distribution Mw/Mn is smaller than or equal to 10 and larger than or equal to 4, Mz+1/Mw is larger than 10 and smaller than 20, the room temperature dimethylbenzene soluble component content is larger than 10 wt% and smaller than 30 wt%, and the ratio of Mw of room temperature trichlorobenzene soluble components to Mw of room temperature trichlorobenzene insoluble components is larger than 0.4 and smaller than 1. The polypropylene foamed board has the advantages of being flat in surface, uniform in foam pore and aperture size distribution, good in high-and-low-temperature anti-impact performance, high in melt strength and the like, can be widely used in the fields of vehicle parts, food and electronic packaging, building decoration and the like, and is simple in preparation method, easy to operate and low in cost.

A lengthened roller double-row conveying chain comprises chain plates, pin shafts, rollers and sleeves. The chain plates include the outer chain plate and the inner chain plate. Two conveying chain bodies spaced by a certain distance are arranged and connected through shaft rollers. The two ends of the shaft rollers and the pin shafts are the same in shape and replace the positions of the pin shafts. The middle parts of the shaft rollers are thicker than the two ends of the shaft rollers. All parts of the conveying chain bodies are processed through multiple special machining technologies, for example, the strengthening carbon supplementing thermal treatment technology and the metal seepage technology are sequentially carried out on the surfaces of the pin shafts and the shaft rollers. The strength of the conveying chain bodies is high, the bearing area of the conveying chain bodies is large, the bearing capability and transmission precision are high, and the rotating speed is even. The synchronous running conveying step pitch is matched, the anti-impact performance and wear-resistant performance are high, and ultra-high corrosion-resisting performance is achieved.

The invention relates to a water-based UV (ultraviolet) resin for UV-Monocoat and a preparation method of the water-based UV resin. The water-based UV resin is sulfonate anionic polyurethane modified acrylate and contains eight active functional groups. The water-based UV resin disclosed by the invention can be made into water-based UV-Monocoat with aluminum paste, transparent color paste, a delustering agent, a photoinitiator, an auxiliary agent and water. A paint film has excellent adhesive force, wear resistance, alcohol resistance, boiling resistance, flexibility, scratch resistance, hand perspiration resistance, high temperature and high humidity resistance, pollution resistance, aging resistance, adhesion resistance and skin feeling, the metal feeling of the paint film is strong, the recoatability is not influenced, and the paint film is safe and environment-friendly. The water-based UV resin can be used for primary coating on the surfaces of plastic substrates such as ABS (acrylonitrile butadiene styrene), PC (polycarbonate), PET (polyethylene terephthalate), ABS+PC, ABS+glass fiber, PC+glass fiber and the like of pen televisions, mobile phones, mice, keys, household appliances, switches, packaging materials, automotive upholstery and the like, and can also be used for surface coating on primer or powder primer of various metal alloy substrates.