62results about How to "Low chemical resistance" patented technology

The invention relates to composite modified asphalt. The composite modified asphalt is prepared from the following raw materials in percentage by weight: 23.1-45.5% of polyurethane modified epoxy resin, 5-10% of compatibilizer, 5-10% of plasticizer, 5-10% of curing agent and 40-60% of road petroleum asphalt, wherein the polyurethane modified epoxy resin is terminal-amino polyurethane modified epoxy resin, terminal-isocyanato polyurethane modified epoxy resin or imidazolyl-terminal-capped polyurethane modified epoxy resin, the compatibilizer is naphthalene oil, asphalt tar or a mixture of naphthalene oil and asphalt tar, the plasticizer is dioctyl phthalate, dibutyl phthalate or a mixture of dioctyl phthalate and dibutyl phthalate, the curing agent is a modified aromatic amine curing agent, and the road petroleum asphalt is 70# petroleum asphalt, 90# petroleum asphalt or 110# petroleum asphalt. The road performance of concrete adopting the polyurethane epoxy resin composite modified asphalt further meets the requirements of technical specifications and surpasses that of the similar imported product Japan Epoxy, so that the composite modified asphalt can be widely applied to the construction of steel bridge deck pavement, and has great significance in opening a market for domestic epoxy asphalt materials.

The invention discloses a method for preparing a high-toughness thermoplastic fluorine-containing polyurethane elastomer, which is characterized in that a bulk polymerization two-step method is adopted to synthesize the fluorine-containing polyurethane elastomer, the isocyanate index is 0.98, and the hard segment content is between 20 and 40 weight percent. The method comprises the following steps of: weighing 6 to 40 parts of non-fluorine macromolecular polylol and/or 30 to 80 parts of fluorine-containing polyether diol in a reactor, performing vacuum dehydration on the mixture for 2h at thetemperature of 120 DEG C, cooling the mixture to be between 70 and 100 DEG C, adding 16 to 33 parts of polyisocyanate into the mixture, stirring the mixture to react for 3h, heating the mixture to bebetween 120 and 140 DEG C, adding 0.1 to 15 parts of low molecular (fluorine-containing) diol chain extender into the mixture, uniformly stirring the mixture, then dumping the mixture into a preheated container, and performing vacuum baking for 20 hours at the temperature of between 120 and 140 DEG C to obtain the high-toughness thermoplastic fluorine-containing polyurethane elastomer.

Disclosed are: a photosensitive modified polyimide resin composition having photo-fabrication property, which is excellent in the electric properties and adhesion as well as in the heat resistance, flexibility, bending property, low warping, chemical resistance and storage stability; a resin film formed from the composition; and a printed circuit board, flexible printed circuit board (FPC) and the like which comprises the film as an insulating protective film and/or interlayer insulation film. The photosensitive modified polyimide resin composition comprises a modified polyimide of a specific structure having a flexible structure such as polycarbonate; a photosensitizer; a curing agent; and a solvent.

The invention provides a halogen-free flame retardant insulation material used for a photovoltaic cable, which belongs to a novel cable material technical field and solves the problems exiting in the present halogen-free flame retardant insulation material used for the photovoltaic cable, that is, poor mechanical properties of tensile strength, elongation break and the like, poor heat aging property, shorter service life, and the like. The halogen-free flame retardant insulation material used for the photovoltaic cable comprises the following components according to a weight ratio: a 100 proportion of base material, 8-35 proportion of flame retardant, 2-8 proportion of stabilizer, and 1-10 proportion of crosslinking sensitizer. The halogen-free flame retardant insulation material used for the photovoltaic cable has the advantages of low production cost, good mechanical properties as heat aging property, tensile strength, elongation break and the like, long service life, low temperature tolerance, ozone resistance, weather resistance, direct current voltage resistance, and dynamic penetration resistance, etc.

The invention discloses a polymer modification blast-furnace slag powder material.The material is prepared from, by weight, 16.1-25.9% of blast furnace slag powder, 61.4-71.7% of silica sand, 1.0-1.9% of sodium hydroxide, 3.3-4.7% of a sodium silicate water solution, 6.0-7.9% of water and 0.01-0.75% of high-molecular polymer.The high-molecular polymer is sodium polyacrylate or polyacrylamide or polyvinyl alcohol.The polymer modification blast-furnace slag powder material has the high ultimate bending strength, high bending toughness and low elastic modulus, the deformation performance can be remarkably improved, the defects that the breaking strength is low and the brittleness is large are overcome, and meanwhile the polymer modification blast-furnace slag powder material has the advantages of resisting high temperature, resisting chemical corrosion, being good in anti-permeability, low in shrinkage rate and the like.

The invention discloses a preparation method of a Ta-based high-temperature protection coating with a self-healing function. The preparation method of the Ta-based high-temperature protection coatingwith the self-healing function comprises the steps of adopting a 99.99-percent high-pure Ta circular block material as a magnetron sputtering target material, adopting a direct-current magnetron sputtering method, pre-sputtering on a clean stainless steel substrate, preparing a layer of completely covered Ta thin film, and obtaining a Ta middle layer with an alpha phase; and selecting the 99.99-percent high-pure Ta circular block material and a high-pure Ag target material as sputtering raw materials, adopting two direct-current magnetron sputtering power supplies for independently regulatingthe two target materials, and preparing a Ta-Ag self-healing high-temperature protection layer on the Ta middle layer with the alpha phase. According to the preparation method of the Ta-based high-temperature protection coating with the self-healing function provided by the invention, the structure regulation of the self-healing layer can be realized; in a Ta-Ag composite thin film structure, Ag is dissolved into a crystal lattice of the metal Ta so as to form a super-solid solution; during the generation of high-temperature cracks, vacancies and microcracks can be filled to the vacancies through the formation of the precipitated-phase Ag so as to achieve healing; and generated tantalum oxide can form a protection layer on the surface of the thin film, so that the further oxidization is prevented.

The invention discloses dicyclohexylmethylmethane-4,4'-diisocyanate prepolymer used for paint curing agent and preparation method thereof, the prepolymer is mainly prepared from (A) 20-50 mass parts of dicyclohexylmethylmethane-4,4'-diisocyanate; (B) 5-60 mass parts of polyalcohol composition; (C) 30-300 mass parts of organic solvent with boiling point less than 200 DEG C; and selective (D) 0.01-1 mass part of organic metal catalyst; and the prepolymer is used for curing agent for alkyd resin paint and has better weathering resistance, yellowing resistance, chemicals resistance and water resistance.

The invention discloses an aerospace tensile power cable which comprises a cable core. The cable core comprises an I-shaped nylon framework. Wire cores are placed on the left side and the right side of the I-shaped nylon framework respectively. Each wire core comprises an oval nylon framework coated with waterproof glue. Elastic cushion plates are placed inside the oval nylon frameworks. Conductors are placed on the two sides of each elastic cushion plate respectively. Each conductor is sequentially coated with an aluminum magnesium alloy wire braided shielding layer and an inflaming retarding silica gel inner sheath. The cable core is sequentially coated with a steel wire braided tensile cylinder, a carbon fiber yarn braided layer, an aluminum foil taped covering and an outer sheath. The aerospace tensile power cable is excellent in electrical characteristic, mechanical characteristic and high and low temperature characteristic, low in friction performance, resistant to chemical and weather and incapable of combustion.

The invention provides a high-strength wear-resistant material for a blast-furnace water slag flushing channel and a preparation method of the high-strength wear-resistant material. The high-strength wear-resistant material for the blast-furnace water slag flushing channel comprises the following raw materials in percentage by weight: 25%-50% of corundum, 10%-20% of silicon carbide, 10%-20% of mullite, 25%-40% o cement, 2%-5% of silica micro-powder, 0.5%-1% of metallic silicon, 0.05%-0.1% of metallic aluminium, 0.05%-0.2% of a water reducing agent and 1%-4% of steel fiber. The high-strength wear-resistant material for the blast-furnace water slag flushing channel provided by the invention is high in applicable temperature, good in thermal shock resistance, good in abrasive resistance and long in service life.

The invention relates to preparation of brake pads in the field of the automobile industry, in particular to a carbon-ceramic based brake pad, which is higher in strength and more stable in performance. In weight percent, the brake pad comprises 5-15% of adhesives, 20-30% of reinforcing materials, 20-30% of frictional property conditioning agents and 30-50% of packing in formula, wherein the adhesives include phenolic resin, silicone modified phenolic resin and butyronitrile modified phenolic resin, the reinforcing materials include carbon fibers, ceramic fibers and aramid pulp, the frictional property conditioning agents include grinding agents and lubricating agents, the grinding agents include aluminum oxide, ferric oxide, magnesium oxide and frictional powder, the lubricating agents include graphite, sulfide and mica, and the packing comprises barium sulfate, potassium titanate and magnesium oxide. The carbon-ceramic based brake pad has negative temperature coefficient, stable chemical performance and resistance to strong acid and strong alkali, and is nonhazardous and extremely high in mechanical performance.

The invention discloses a polymer cement waterproof coating with high corrosion resistance and a preparation method thereof. The high-corrosion-resistance polymer cement waterproof coating comprises the following raw materials: cement, quartz sand, a coupling agent, a defoaming agent, a water reducing agent, a dispersing agent, a pigment and a polymer emulsion. The polymer cement waterproof coating prepared by the invention is excellent in acid and alkali resistance, sulfate resistance and seawater corrosion resistance and high in bonding strength with a concrete base material, and still has high bonding strength after being corroded by acid, alkali and salt; the polymer cement waterproof coating prepared by the invention has excellent chloride ion permeability resistance, high density andlow water absorption rate; the polymer cement waterproof coating prepared by the invention can be constructed by using a blade coating, picture brushing or roll coating method, is easy to operate andpopularize, can be directly constructed on a humid basal plane, and is relatively low in cost.

The invention relates to a silicon-fluorine modified styrene-acrylic emulsion and a preparation process thereof. The silicon-fluorine modified styrene-acrylic emulsion comprises the following raw materials: butyl acrylate, styrene, acrylic acid, nonylphenol polyoxyethylene ether, lauryl sodium sulfate, vinyltriethoxysilane, ammonium persulfate, sodium bicarbonate, tetrahydrofuran, methacrylic acid, acrylamide, N-hydroxymethyl acrylamide, hydroquinone, a fluorine-containing monomer, ammonia water and a proper amount of deionized water. The preparation process comprises a pre-emulsification method, a semi-continuous monomer dropwise adding method and an organosilicon monomer post-adding method. According to the invention, the comprehensive performance of the emulsion is studied by a polymerization process, a polymerization temperature, the addition amounts and addition modes of organic silicon and organic fluorine, and the dosage and proportion of an emulsifier; the styrene-acrylic emulsion has the advantages of both organic silicon and organic fluorine, so that the performance of the emulsion is better improved on the basis of effectively reducing the cost of the emulsion, the emulsion with higher market competitiveness is obtained, and the blank of domestic and overseas markets is filled.

Disclosed are a novel epoxy-group-containing copolymer and a process for producing the copolymer. Also disclosed are an epoxy (methyl) acrylate copolymer produced by using an epoxy-group-containing copolymer as a raw material and a process for producing the copolymer. The epoxy-group-containing copolymer comprises a specific epoxy-group-containing repeating unit and an olefin-type repeating unit. The copolymer can be reacted with (methyl) acrylic acid, thereby producing the novel epoxy (methyl) acrylate copolymer.

The method of improving the compatibility between liquid crystal polymer with rigid chain and nylon with flexible chain is suitable for the compatibility modification of nylon. The method includes the first synthesizing polyamide of smelting point of 223-284deg.c as the liquid crystal polymer with o-tolidine, PEG2 and PEG3 monomers; pre-mixing the polyamide and nylon with fitting smelting point in the weight ratio of 5 to 95-50 to 50; and smelting the mixture in an extruder to obtain the well compatible liquid crystal polyamide reinforced nylon material. The present invention utilizes intermolecular hydrogen bonding in improving the compatibility between liquid crystal polymer and nylon, and simplifies the triphase reinforcing system into a biphase one.

The invention discloses a sterile vacuum packing technique for infant clothing. The technique comprises the following steps that (1) the infant clothing is washed with water; (2) the infant clothing washed with the water is subjected to spin-drying and drying; (3) the dried infant clothing is subjected to ozone sterilization; (4) the sterilized infant clothing is subjected to high temperature disinfection, and the temperature of high temperature disinfection is 110 DEG C; and (5) the disinfected infant clothing is subjected to vacuumizing packing. According to the sterile vacuum packing technique for the infant clothing, the contents of impurities, bacteria and the like in the infant clothing can be effectively reduced, so that the wearing health of the infant clothing is improved.

The invention discloses light-colored infrared absorbing UV-LED ink-jet ink and a preparation method thereof. The light-colored infrared absorbing UV-LED ink-jet ink is composed of the following ingredients (by weight): 1-10% of an infrared absorbing dye, 15-35% of a prepolymer, 4-10% of an initiator, 52-70% of a reactive diluent, 0.1-2% of a surfactant and 0.1-2% of an auxiliary agent. The ink-jet ink can be used in industrial production. For one pass ink-jet printing, printing speed is 80 m/min-100 m/min. Smooth printing is guaranteed. The ink-jet ink has characteristics of no misting, rapid solidification, low energy, good light resistance and the like.

The invention discloses an ultraviolet (UV) coating capable of forming porcelain lines automatically and a production method thereof. The UV coating capable of forming porcelain lines automatically is characterized in that the UV coating capable of forming porcelain lines automatically is white and turbid liquid, has specific gravity (25 DEG C) of 0.95 to 1.0 and viscosity (second 25 +/- 1 DEG C)of 12.5 to 13.5 seconds, and comprises 31 to 35% of a solid component. The UV coating capable of forming porcelain lines automatically has excellent wear resistance and scratch resistance thus havinggood conditions for preservation, has high hardness and high toughness thus having excellent buckling performances, has good chemical resistance, has low shrinkage thus being deformed difficultly, and allows gloss adjustment on a surface to realize highlight or delustring. A system of the UV coating capable of forming porcelain lines is a UV system, provides multiple color collocation, and allowscolor adjustment on a line part and the UV coating capable of forming porcelain lines so that diversification of color selectivity is realized.

The invention discloses a nylon 11/polylactic acid biological base high molecular alloy, which comprises the following substances in parts by weight: 30-70 parts of nylon 11, 30-70 parts of polylacticacid, 1-8 parts of a compatilizer and 0.1-0.6 part of a stabilizer. A preparation method of the nylon 11/polylactic acid biological base high molecular alloy comprises the following steps: vacuum-drying a PA11 matrix resin, a PLA resin, the compatilizer and the heat stabilizer; uniformly mixing the materials through a high speed mixer; then extruding the mixture through a twin-screw extruder, anduniformly granulating the mixture; and finally, drying the mixture in a vacuum oven to remove water. The primary raw material of the nylon 11/polylactic acid biological base high molecular alloy is the biological base material, so that the demand on a petroleum-based high molecular material is lowered. The nylon 11/polylactic acid biological base high molecular alloy material has great tensile strength, high modulus, high impact performance, good heat stability and low price, and the production process technology thereof has low demand on equipment, and the alloy is suitable for industrial production on a large scale.

The invention discloses a glass fiber which comprises the following raw materials in parts by weight: 30-50 parts of SiO2, 6-10 parts of Al2O3, 1-4 parts of CaF2, 10-14 parts of ZrO2, 11-16 parts of Ln2O3, 4-6 parts of TiO2, 60-70 parts of H2O and 50-70 parts of H3BO3. The glass fiber is mainly prepared by the following steps: mixing the raw materials, melting, drawing, pickling and performing heat setting treatment. The glass fiber disclosed in the invention has the beneficial effects that (1) the glass fiber disclosed in the invention is excellent in acid resistance, low in molding temperature and low in cost, and the production efficiency is improved; (2) the glass fiber disclosed in the invention is excellent in high temperature resistance, can be applicable to a temperature of 1000 DEG C or less for a long time, and has excellent ablation property, excellent high temperature resistance and chemical resistance; (3) the processing technology of the glass fiber is low in cost, simpleto operate and suitable for more small and medium-sized enterprises.

The invention discloses a preparation method of an ultraviolet light-cured coating for a seamless steel pipe, which comprises the following steps: adding isocyanate and a catalyst to a reaction vessel, stirring, adding hydroxyethyl acrylate to react for a certain time to obtain an acrylic polyurethane oligomer; adding isocyanate and a catalyst to a reaction vessel, stirring, adding hydroxyethyl acrylate to react and controlling the temperature, adding polyhydric alcohol to react for a certain time to obtain a polyhydric alcohol modified acrylic polyurethane oligomer; mixing the two oligomers obtained, adding bisphenol A epoxy acrylate and organosilane modified polyurethane acrylate, stirring to react, adding activated monomer, photoinitiator and 0.05-5wt% of thermal stabilizer, and mixingto obtain the ultraviolet light-cured coating for the seamless steel pipe. The coating is used for spraying the seamless steel pipe, and is superior to the traditional ultraviolet light cured coatingin the aspects of rigidity, adhesion, shock resistance, wear resistance, and surface smoothness, flexibility and gloss of film coating.

An aluminum titanate-mullite cellular ceramic and its production are disclosed. The process is carried out by putting into clay alumina, titanium oxide, ashlar and magnesite-alumina spinel, mixing, wet grinding in ball grinder into powder below 500 meshes, filter pressing, vacuum mud refining to make mud blocks, adding into plastic adhesive with methyl-cellulose and polyvinyl alcohol, extruding, forming, drying and firing at 1450-1600 degree to obtain final product. It's stable, has high melt point, low heat expansion coefficient, excellent chemical-corrosive and thermal shock resistances. Itcan be used in high-temperature heat-storage burning system in industrial furnace, petroleum catalytic cracking and tailed-gas catalytic purifying of automobile industries.