30results about How to "Does not affect heat resistance" patented technology

The invention discloses a method for preparing flame-retardant waterborne polyurethane containing phosphaphenanthrene and/or phenyl phosphate groups. The method is characterized by comprising the following step of reacting dihydric alcohol as a reactant which contains phosphaphenanthrene and/or phenyl phosphate groups and of which the hydroxyl groups are symmetric with diisocyanate, macromolecular dihydric alcohol, anionic or cationic hydrophilic chain extender and the like to synthesize flame-retardant waterborne polyurethane. According to the method, since flame-retardant dihydric alcohol is used as one of chain extenders, flame-retardant dihydric alcohol ca partially or totally substitute other small molecular chain extenders, phosphorus-containing flame-retardant groups are controllable in content and difficult to migrate and are evenly distributed, and the flame-retardant property of waterborne polyurethane can be enduringly retained. According to the structural characteristics of selected flame-retardant dihydric alcohol, by virtue of one and a combination of two or more of flame-retardant groups, phosphorus in the flame-retardant groups can be alone located at a main chain, side chains or simultaneously located at the main chain and the side chains of the polyurethane molecule chain as desired so as to meet the requirements of different flame-retardant properties or other properties such as mechanics, toughness and plasticity.

The invention provides a diaphragm, a preparing method of the diaphragm and a lithium ion battery comprising the diaphragm. The diaphragm comprises a polymer substrate and slurry layers positioned at the inside and on the surface of the substrate; each slurry layer comprises ceramic particles and curing resin; the curing resin is obtained through performing cross-linking and curing reaction on curing agents or initiating agents positioned inside the substrate and cross-linking resin positioned in the slurry layers; the high-temperature-resistant performance of the diaphragm is excellent; a heat-resistant layer cannot easily fall; and the winding, the preparation and the practical application are easier.

The invention relates to the field of micro-electronic packaging materials, and discloses bismaleimide containing 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and asymmetric in molecular structure, as shown in a general formula (II) shown in specification, as well as a preparation method and application of the bismaleimide in preparation of composite resin. The bismaleimide containing DOPO and asymmetric in molecular structure disclosed by the invention is soluble in such conventional organic solvents as acetone, so as to facilitate processing and using; the bismaleimide containing DOPO and asymmetric in molecular structure disclosed by the invention can be used for further preparing cyanate ester composite resin, and a cured product is good in thermal stability and flame retardance; and as a base material for packaging in the micro-electronic packaging field, the bismaleimide has good application prospect.

The invention discloses reaction-type flame-retardant glycol containing a phenyl phosphate-based symmetrical structure and a preparation method thereof. The preparation method is characterized by comprising the following steps: reacting phenyl dichlorophosphate with dihydric alcohol in a tetrahydrofuran or ethyl acetate solution in the presence of triethylamine, placing the tetrahydrofuran or ethyl acetate solution of dihydric alcohol and triethylamine into an ice-water bath, stirring and dropwise adding the tetrahydrofuran or ethyl acetate solution of phenyl dichlorophosphate; and filtering a precipitate and then removing the solvent in the filtrate to obtain the product with a structural general formula specified in the description, wherein n is an integer ranging from 2 to 6. According to the preparation method disclosed by the invention, micromolecular dihydric alcohol is introduced in the phenyl dichlorophosphate group in a manner of chemical bonding, so that the obtained dihydric alcohol molecular structure contains both the phenyl dichlorophosphate group and two hydroxyl groups with symmetrical structures and same reaction activity, and can partially or completely replace the micromolecular dihydric alcohol without a flame-retardant characteristic, so that the prepared polymer material has a flame-retardant characteristic; the raw materials in the preparation method disclosed by the invention are easily available, synthesis and post-treatment processes are simple, the cost is low, and the yield can achieve more than 90%.

The invention belongs to a composite material high performance technology, relates to toughening material of composite material and a preparation method of the toughening material. The toughening material is made of non-woven cloth comprising thermoplastic polymer fiber, the thickness of the non-woven cloth is 5 to 50 micrometers, and the fiber diameter of the non-woven cloth is about 0.2 to 5 micrometers. The preparation method comprises the steps as follows: yarns are sprayed out through solution; the yarns are deposited to become the non-woven cloth; and then the fiber non-woven cloth toughening material is formed through drying and collection. The method adopting a solution spray process to prepare the non-woven cloth toughening material can effectively improve the preparation efficiency, and realize the mass manufacture of the toughening material. The toughening material prepared by the method can obviously improve the compression performance of impacted resin matrix composites, and compared with the prior art, the method has the advantages that the compression strength of the impacted resin matrix composites is improved by 50 to 150 percent, the heat resisting property and the mechanical property of composite material, as well as the flowing of resin during the forming of the composite material, are not affected, and the yield and the quality stability of the composite material are improved.

The invention relates to the technical field of thermoplastic high polymer material modification and discloses halogen-free flame retardant highlight polypropylene applied to household appliances, electronics and the like. The halogen-free flame retardant highlight polypropylene comprises the following materials: polypropylene, a nucleating agent, a halogen-free flame retardant, a superfine barium sulphate filling agent, an antioxidant and a processing aid. The invention also discloses a preparation method of the halogen-free flame retardant highlight polypropylene. The invention aims at providing high-glossiness, halogen-free and flame retardant modified polypropylene which can be applied to a bread maker, a water dispenser, a shell of an electric appliance and the like.

The invention discloses a 150 DEG C heat-resistant crosslinked low-smoke halogen-free electronic wire material and a preparation method thereof and aims to solve the problem that in order to achieve a certain flame-retardant effect, the usage of inorganic filler in an existing wire and cable insulating material exceeds 50% universally, so that the mechanical property is not good enough, particularly, the flexibility of the electronic wire material is affected as the elongation at break is relatively low. The key point of the technical scheme is as follows: the material comprises the following components in parts by weight: 20-40 parts of EVA, 5-10 parts of PE, 1-5 parts of grafted PE, 30-65 parts of inorganic filler, 0.2-1.8 parts of an antioxidant, 0.2-1.8 parts of a crosslinking agent and 0.2-1.8 parts of a plasticizer. By adopting the formula, the flame retardance of the electronic wire material is improved, the elongation at break of the electronic wire material is improved, and the mechanical property of the electronic wire material is ensured.

An ester cyanate resin system with organic titanium epoxy resin as catalyst is characterized by taking organic titanium modified epoxy resin as catalyst, which is obtained by reacting tetrabutyl titanate with hydroxyl in glycidol ether epoxy resin structure, and consisting of ester cyanate resin 70-99.99% and organic titanium epoxy resin catalyst 0.01-30%. It can improve curing process of resin system, lower curing temperature, shorten curing time and cost low.

The invention belongs to the technical field of ceramic materials, and provides a novel iron-manganese heat resistant cooker and a production technology thereof. A low expansion coefficient raw material such as spodumene is not required in the formula of the product; the heat conductivity coefficient of the ceramic ware is greatly improved by improving the heat conductivity coefficient and the thermal shock resistance of ceramic; the sintering temperature is low, and the maturing temperature is wide in range and is 1,160 to 1,230 DEG C; the product is high in superior quality, can be quickly sintered, can tolerate the heat exchange of 500 to 20 DEG C without cracking, has the advantages of low energy consumption, high heat conductivity, high impact strength, thermal shock resistance and the like, and can be used for directly steaming, boiling, stewing and stir-frying food over a heat source; and the cooker keeps the cooking flavor of the conventional ceramic ware, does not decompose nutritional components in the food, and is an ideal multifunctional cooking ware for modern families, hotels and restaurants.

The invention discloses a composite non-sticky coating material. The composite non-sticky coating material is prepared from 10-12 parts of graphene oxide, 8-10 parts of polyethylene, 8-9 parts of wood fiber, 6-8 parts of polyvinyl chloride, 7-9 parts of kieselguhr, 5-8 parts of dimethyl phosphite, 6-8 parts of sodium bicarbonate, 6-7 parts of terpene resin, 5-7 parts of rosin, 4-5 parts of mica powder, 5-8 parts of silicon dioxide, 6-8 parts of titanium oxide, 5-10 parts of bentonite, 6-8 parts of activated carbon, 5-6 parts of ethylenediaminetetraacetic acid, 4-5 parts of sodium citrate, 3-5 parts of acrylic acid, 4-6 parts of ferrocene, 8-10 parts of polyurethane, 8-10 parts of polyvinyl alcohol resin, 3-5 parts of sodium carboxymethylcellulose, 2-3 parts of nanometer titania, 3-4 parts of nanometer aluminum powder, 4-5 parts of nanometer copper powder and 2-3 parts of nanometer silver powder. The composite non-sticky coating material has the good conductivity, few materials are adopted, the conductive effect of a non-sticky coating can be remarkably improved, energy conservation and dissipation reduction are achieved, and various other indexes such as non-stickiness, adhesive force, heat resistance, friction resistance and corrosion resistance of the non-sticky coating are not affected.

The invention relates to a polyimide resin, a polyimide film and a preparation method and application thereof, the polyimide resin has a structural general formula as shown in formula (I), in the formula, A is a dianhydride residue, and B is a diamine residue; a fluorine side group is introduced into an aromatic ring, so that the water absorption and moisture absorption of diamine can be greatly reduced, and the water absorption of the polyimide film is reduced; and a fluorine side group on fluorine-containing diamine directly replaces a hydrogen atom on a benzene ring, the heat resistance and the coefficient of thermal expansion (CTE) of polyimide cannot be affected, the prepared polyimide film is good in heat resistance and low in coefficient of thermal expansion, the application field of polyimide can be expanded through introduction of the fluorine-containing side group, the polyimide can be used in display substrates, solar cell substrates, and the like, the tensile strength of the prepared film is larger than or equal to 300 MPa, and the elastic modulus of the film is larger than or equal to 8 GPa.

The environment-friendly peroxy-vulcanized EPDM material suitable for automatic demolding comprises the following raw materials in parts by weight based on 100 parts of raw rubber: 90-105 parts of ethylene propylene diene monomer rubber; the rubber composition is prepared from the following components in parts by weight: 30 to 40 parts of carbon black N550, 40 to 50 parts of carbon black N774, 10 to 20 parts of argil N85, 10 to 30 parts of polyisobutene, 2 to 5 parts of zinc oxide, 0.5 to 2 parts of stearic acid, 0.6 to 0.8 part of anti-aging agent SP-P, 1.5 to 3 parts of peroxy vulcanizing agent BIBP and 5 to 15 parts of peroxy assistant crosslinking agent cis-butadiene rubber BR9000. The release effect of the EPDM peroxy vulcanization formula can be greatly improved under the condition that no auxiliary agent is added, the release agent is suitable for automatic production, and the raw material cost can be reduced to a certain extent.

The invention discloses a low-flash high-toughness good-surface polyphenylene sulfide composition as well as a preparation method and application thereof. The polyphenylene sulfide composition is prepared from the following components in parts by weight: 95 to 99 parts of polyphenylene sulfide, 1 to 5 parts of a toughening agent, 0.5 to 1.5 parts of a coupling agent and 0.2 to 1 part of an antioxidant. The power law index of the polyphenylene sulfide is 0.5 to 0.9. The tackifying index of the polyphenylene sulfide composition is 2 to 8. The polyphenylene sulfide composition disclosed by the invention has low flash and relatively high impact strength on the premise of not influencing high heat resistance, solvent resistance and dimensional stability of the polyphenylene sulfide composition, and has a good application prospect in the field of electronic appliances.