43results about How to "Good thermosetting" patented technology

Disclosed is a process for the manufacture of an elastic polyurethane fiber, including mixing one component selected from among polystyrene polymers or polystyrene copolymers having a number average molecular weight of 50,000–500,000 with polyurethane having a number average molecular weight of 15,000–100,000, to prepare a polymer mixture, which is then spun. The polyurethane elastic fiber made by the method is also provided, which is greatly increased in heat set properties, with a very low rate of change of fundamental properties as the results compared with conventional elastic polyurethane fibers. Hence, the elastic polyurethane fiber can be directly applied for preparation of end products requiring superior heat set properties with no change of conventional conditions of the process.

The invention relates to a high-boron content silicon-boron-carbon-nitrogen precursor and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing functional, bifunctional and trifunctional chlorosilane containing unsaturated groups and hexamethyl-disilazane at a low temperature according to a certain ratio, raising the temperature and completely reacting, dropping 1,3-diethyl cycloborazane under low temperature conditions according to a certain ratio, fully reacting the reactants, and finally performing reduced pressure distillation to obtain the solvent and by-products produced by the reaction, thereby obtaining faint yellow viscous liquid or a solid product, namely the SiBCN ceramic precursor. According to the synthetic method disclosed by theinvention, a novel Polyborosilicate resin is prepared by adopting a 'double boron source', the boron content of the prepared SiBCN ceramic can reach 20%, and the problems that the boron content is low and improvement of high temperature resistance and oxidation resistance of the ceramic is not obvious can be solved. The elementary composition regulation range of the precursor disclosed by the invention is wide, and resins which are suitable to serve as a high-temperature-resistant coating, a fiber reinforcement or a ceramic-based composite material matrix and have different elementary compositions can be prepared.

The invention provides a repairable cross-linked solid polymer electrolyte as well as a preparation method and application thereof, and the repairable cross-linked solid polymer electrolyte is prepared by the following method: dispersing and dissolving terephthalaldehyde, bisphenol A diglycidyl ether, polyethylene glycol diamine and a lithium salt in an acetonitrile solvent, and carrying out stirring for 2-6 hours to obtain a transparent and uniform mixed solution A; dropwise adding the mixed solution A onto a polytetrafluoroethylene mold, and volatilizing acetonitrile at room temperature to obtain a sol-like substance B; and putting the sol-like substance B into a vacuum drying oven, carrying out polymerization reaction to completely crosslink and solidify the sol-like substance B, and continuously heating to dry the sol-like substance B to prepare the polymer electrolyte. According to the invention, a dynamic imine covalent bond is introduced into the polymer electrolyte to form thesolid network-shaped polymer electrolyte, so that the solid network-shaped polymer electrolyte can be repaired in time when fracture occurs in the use process; the prepared network-like polymer electrolyte has high thermal stability and dendritic-crystal-free morphology, and has excellent electrochemical properties such as ionic conductivity and lithium ion migration number.

A polyurethane glass sealant is made by reacting a poly(l,2-butylene oxide) polymer with a chain extender and a polyisocyanate. The poly(l,2-butylene oxide) polymer may be used as a mixture with up to 50% by weight of other polyols, including castor oil. The sealant is especially useful as a secondary sealant for an insulated glass unit (IGU).

The invention discloses a novel glass adhesive. The novel glass adhesive is prepared from the following raw materials in parts by weight: 20-40 parts of styrene-butadiene rubber, 13-22 parts of polyacrylic acid, 15-27 parts of epoxy resin, 7-14 parts of methyl methacrylate, 8-17 parts of starch, 11-18 parts of polyurethane, 15-26 parts of acetone, 2-5 parts of Chinese herbal medicine mixture, 17-28 parts of filler, 3-6 parts of modifier, 1-3 parts of oxide additives and 4-7 parts of curing agent. The novel glass adhesive is good in adhesiveness and long in service life, is not prone to spalling and is not prone to chemical residue generation and environmental pollution causing.

The invention discloses an amorphous nanocrystalline composite magnetic powder core and a preparation method thereof, and the amorphous nanocrystalline composite magnetic powder core is prepared fromFe-based amorphous nanocrystalline magnetic powder and nano-grade glass powder/micron-grade glass powder through spark plasma sintering. The amorphous nanocrystalline composite magnetic powder core has high permeability, high density, low magnetic loss and low coercivity, so the amorphous nanocrystalline composite magnetic powder core has excellent soft magnetic and mechanical properties, and canbe widely used for manufacturing high-power switching power supplies, high-power inductors and high-efficiency energy-saving motors and other equipment.

The invention discloses a regenerant for aged asphalt and a preparation method thereof, and belongs to the field of road engineering. The asphalt regenerant of the invention is composed of the following ingredients (by weight): 10-20 parts of furfural extract oil, 10-15 parts of bisphenol A epoxy resin, 1-3 parts of glycidyl methacrylate, 1-3 parts of dimethyl phthalate, 1-3 parts of ethanol, 2-5parts of alicyclic epoxy resin, 5-10 parts of used oil, 2-5 parts of dibutyltin dilaurate, 1-3 part of cyclohexanone, 2-5 parts of epoxidized fatty acid methyl ester, 1-3 parts of petroleum ether, 1-3parts of epoxidized soybean oil, 1-5 parts of heavy oil and 1-3 parts of cycloalkyl distillate. The regenerant has characteristics of high temperature performance, excellent low-temperature crack resistance and strong ageing resistance and weather resistance, and is suitable for large-scale promotion and application.

The invention discloses a coating material for aircraft titanium alloy fasteners and a preparation method thereof. 5-10 parts of aluminum powder, 3-5 parts of anti-corrosion filler, 1-3 parts of lubricant, 3-6 parts of thixotropic agent, 1-3 parts of plasticizer, 1.5-2.5 parts of dispersant, 2-8 parts of solvent, The invention relates to a coating material for aircraft titanium alloy fasteners. The aircraft titanium alloy fastener coating can have good strength, toughness and lubricating performance, meet the requirements of the fastener use environment, and have good stability.

The invention provides a composite for improving interfacial effect of a photoresist dry film and a barrier and a preparation and usage method thereof, and a method for manufacturing a barrier of a plasma display panel by utilizing the composite; the composite comprises glass powder, plasticizer, alkali solubility adhesive low polymer, dispersing agent, inorganic filler and solvent; by utilizing the composite and method of the invention, the combinability of the barrier and the photoresist dry film can be improved, so as to reduce the disadvantage that the barrier is easy to incline and collapse after sand blasting is carried out, and improve the finished product ratio.

The invention discloses a thermosetting amino-acid resin coating. Raw materials of the thermosetting amino-acid resin coating comprise, by weight, 100 parts of a thermosetting amino-acid resin composition, 35-50 parts of an aluminum-magnesium-zinc alloy pigment, 10-12 parts of an amino acid salt, 3-5 parts of an auxiliary solvent, 0.5-2 parts of an auxiliary agent, 0-1 part of a curing agent and 30-35 parts of water, wherein the thermosetting amino-acid resin composition comprises, by weight, 50 parts of methanol, 35-50 parts of hexamethylolmelamine, 15-18 parts of sodium glutamate or sodium aspartate, 3-5 parts of ammonium sulfamate, ammonium p-toluenesulfonate or ammonium tartrate, 40 parts of a mixture obtained by mixing wollastonite and talcum powder according to a ratio of 3:1, 50-65 parts of propyleneglycol monomethyl ether and 1.5 parts of diethanolaniline. The thermosetting amino-acid resin coating has good storage stability, good thermosetting property and good water resistance; a reaction temperature is low; and a reaction time is short.

The invention provides a glass adhesive and a preparation method thereof and relates to the technical field of adhesives. The glass adhesive is prepared from the following raw material components in parts by weight: 100-120 parts of UF (urea-formaldehyde) resin, 10-20 parts of bentonite, 3-4 parts of metallic soap, 30-40 parts of starch, 5-6 parts of dimethyl carbonate, 6-10 parts of a curing agent, 30-50 parts of filler, 4-6 parts of a modifier and 90-110 parts of water. The preparation method comprises the following steps: 1) adding UF resin, coal tar, metallic soap, alkanolamide and water to a mixer for sufficient stirring and adhesive mixing; 2) adding the starch and the filler for stirring until no air mass is left in the mixer; 3) adding the curing agent to be stirred for 5-10 minutes, and then leaving the mixture to stand for 15 minutes; 4) adding the modifier for mixing finally. The glass adhesive has the advantages of good thermosetting property, high viscosity, high strength, good endurance, good waterproof effect and long service life, and is not easy to degenerate or crack.

The invention relates to a variable stiffness self-repairing material containing a metal-sulfydryl coordination bond. The variable stiffness self-repairing material is prepared from a sulfydryl-terminated small molecule compound, sulfydryl-terminated liquid polysulfide resin, a cross-linking agent, zinc salt, other metal salts, an alkaline regulator and a solvent. The structure of the material contains a large number of metal-sulfydryl coordination bonds, and the coordination bonds have good thermodynamic stability, so that the material has higher rigidity and mechanical strength; the good dynamic activity of the coordination bond ensures that the material has good self-repairing performance; due to the high temperature sensitivity of the coordination bond, the variable stiffness of the material in a wide temperature range is ensured; the coordination bond is insensitive to water, so that the environmental use stability of the material is ensured; meanwhile, the material has the characteristics of high transparency and adjustable refractive index. The variable stiffness self-repairing material containing the metal-sulfydryl coordinate bond can be applied to the fields of sealants, self-repairing coatings, temperature-sensitive variable stiffness self-repairing engineering materials, additive manufacturing, composite materials, optical transparent adhesives and the like.

The present invention relates to a formaldehyde-free medium-high-density board capable of meeting deep facing requirements, and a method for manufacturing same. The method includes: wood chipping, screening, cooking and softening, fiber separating, gluing, drying and sorting, paving, pre-pressing, hot pressing, cooling, sanding, and inspection and warehousing, where the gluing is two-step gluing, including: first performing gluing once by using a lignin adhesive, and then performing secondary gluing by using an MDI adhesive after waterproof treatment. According to the manufacturing method of the present invention, by using biomass adhesives and formaldehyde-free adhesives without adding additives such as a curing agent and an anti-mildew agent, formaldehyde pollution is eliminated from the source by using a two-step gluing method, so that production is formaldehyde-free, and the product is formaldehyde-free. Through the sequential control of the gluing process and the grasp of the gluing type and ratio, surface hardness of the product is improved, and the final product is capable of deep facing to reach 20 to 80 filaments.

The invention provides a production technology of a waterproof plywood and relates to the technical field of plywood production. The production technology comprises the following steps: peeling barks from logs, annularly cutting the logs into wood sheets, and then air-drying; applying an adhesive, and coating the wood sheets with the adhesive which comprises the following components in parts by weight: 100-120 parts of UF resin, 10-20 parts of coking coal oil, 10-20 parts of metallic soap, 10-20 parts of alkanolamide, 6-10 parts of a curing agent, 30-50 parts of filler, 5-9 parts of a modifier and 90-110 parts of water; conveying the wood sheets onto a conveyor belt, softening the wood sheets by using a heating device to heat the wood sheets to 60-80DEG C, and then, planishing the wood sheets through compression rollers; replenishing the adhesive; assembling a blank; pre-pressing; trimming and hot-pressing; filling putty; and sawing edges and molding so as to obtain the polywood. The production technology is short in pre-pressing and hot-pressing time and high in production speed. The waterproof plywood is small in internal stress, cannot easily come apart or deform as the adhesive is good in thermosetting property, high in viscosity, high in strength, good in durability and is not prone to going bad, and is good in waterproof effect.

The invention relates to a production process of a high-strength environment-friendly particle board. Raw materials are subjected to slicing, flaking, drying, screening, adhesive mixing, laying, pre-pressing, hot-pressing, after-treatment and the like. According to the production process of the high-strength environment-friendly particle board, the prepared environment-friendly particle board finished product has the advantages of being free of formaldehyde, environmentally friendly, good in thermosetting performance, high in waterproofing and fireproofing performance, long in service life, high in strength, not prone to deformation and the like.