47 results about "Ethylene oxide-propylene oxide copolymer" patented technology

A conductive thermoplastic elastomer composition comprising a component (A) containing a thermoplastic resin or / and a thermoplastic elastomer; a component (B) comprising an ionic-conductive agent containing an ethylene oxide-propylene oxide copolymer or / and an ethylene oxide-propylene oxide-allyl glycidyl ether copolymer and a metal salt contained in the ethylene oxide-propylene oxide copolymer or / and the ethylene oxide-propylene oxide-allyl glycidyl ether copolymer; and a component (C) comprising an ethylene-acrylic ester-maleic anhydride copolymer.

A conductive thermoplastic elastomer composition comprising a component (A) containing a thermoplastic resin or / and a thermoplastic elastomer; a component (B) comprising an ionic-conductive agent containing an ethylene oxide-propylene oxide copolymer or / and an ethylene oxide-propylene oxide-allyl glycidyl ether copolymer and a metal salt contained in the ethylene oxide-propylene oxide copolymer or / and the ethylene oxide-propylene oxide-allyl glycidyl ether copolymer; and a component (C) comprising an ethylene-acrylic ester-maleic anhydride copolymer.

The invention provides a process for preparing vinyl acetate-ethylene copolymers by means of free-radically initiated emulsion polymerization of vinyl acetate and 18% to 34% by weight of ethylene, based on the total weight of the vinyl acetate and ethylene monomers, and, optionally, further comonomers, characterized in that polymerization takes place in the presence of at least one protective colloid and of 0.5% to 4% by weight, based on the total amount of monomers, of at least one nonionic, ethoxylated emulsifier with a branched or linear alkyl radical or in the form of ethylene oxide-propylene oxide copolymers, and in the absence of chain transfer agent, and, before the initiation of the polymerization, 10% to 70% by weight of the vinyl acetate monomer and 40% to 100% by weight of the ethylene monomer are included in the initial charge, up to 100% by weight of the protective colloid fraction is included in the initial charge, at least 25% by weight of the emulsifier fraction is included in the initial charge, and the remaining fractions of monomers, protective colloid and emulsifier are metered in during the polymerization, the procedure being such that the criterion of process COP meets the condition2.5≦COP≦70, whereCOP=100×(ETM2.5×ETV1.25×EA2.5×EV1.5×VV−1), whereETM=MEt / MM, ETV=MEtV / MEt, EA=100 ME / MM, EV=MEV / ME and VV=MVacV / MVac, whereMEt=total mass of ethylene in kg, MM=total mass of monomer in kg, MEtV=mass of ethylene charge in kg, ME=total mass of emulsifier in kg, MEV=mass of emulsifier charge in kg; MVacV=mass of vinyl acetate charge in kg, and MVac=total mass of vinyl acetate in kg.

The invention discloses a high-efficiency water-reducing agent, which is prepared by the following raw materials in parts by weight: 50-60 parts of beta-naphthalene sulfonate formaldehyde condensate, 20-30 parts of poly(ethylene glycol) monomethyl ether methacrylate, 15-25 parts of calcium lignosulphonate, 10-15 parts of ethylene oxide-propylene oxide copolymer, 2-4 parts of trehalose, 1.5-2.5 parts of silicone powder, 4-8 parts of shale ashes, 2.5-4.5 parts of sodium hydrogen sulfite, 5-10 parts of polyethylene oxide, 8-14 parts of aluminum tripolyphosphate, 2-3 parts of cocoanut oil diethanolamide, 1-2 parts of barium dinonyl naphthalenesulfonate, 2-3 parts of urotropine, and 3-5 parts of auxiliaries. The water-reducing agent is high in water-reducing rate, good in flowability, capable of obviously improving the flowability and working degree of the concrete, obvious in early-strength effect after being finally set, capable of greatly improving the strength of the concrete in all ages, and applicable to various concretes.

Disclosed is an underwater-non-dispersing non-shrinking grouting material. The raw material formula of the grouting material is as follows: 60-65% of Portland cement, 5-8% of aluminate cement, 5-7% of desulphurization gypsum, 2-3% of a high-activity magnesia expansive agent, 2-3% of a medium-activity magnesia expansive agent, 0.1-0.3% of a polycarboxylic acid water reducing agent, 0.02-0.05% of triethanolamine, 1-2% of alum, 0.05-0.08% of polyacrylamide, 0.05-0.08% of an ethylene oxide-propylene oxide copolymer and the balance of water. The grouting material provided by the invention has a good flow ability and groutability, and is not dispersed or segregated during direct grouting construction underwater. The hardened grout body has good strength both in the early and later period. The grout body has comparatively high volume stability and does not shrink, and the durability is improved obviously.

The invention relates to a test strip for detecting low-density lipoprotein cholesterol in serum. The test strip includes a dry chemical reaction chip, the dry chemical reaction chip is prepared by soaking a reagent pad in a chemical reagent and then drying the reagent pad, and the chemical reagent is prepared from cholesterol esterase, cholesterol oxidase, peroxidase, metal salt, a color developer, polyoxyethylene ether and an ethylene oxide-propylene oxide copolymer having preferable concentrations according to a preferable ratio. The test strip has the advantages of low cost, easiness in preparation and obtaining, quickness in reaction and convenience in operation.

The invention belongs to the pulping field, and particularly relates to a clean preparation method of high-quality and high-purity natural-color bamboo fluff pulp. The method comprises the following steps that natural-color KP bamboo pulp is fully and uniformly defiberized; the defiberized pulp is diluted and then fed into a heat disperser, and sodium hydroxide is added for alkali extraction; the pulp subjected to heat dispersion is diluted with water and enters a flotation machine for flotation, and meanwhile a trapping agent oxirane-epoxypropane copolymer is added; the pulp obtained after flotation is washed and shrunk through a vacuum pulp washer, and generated washing waste liquid is drained; the pulp enters a pulp board papermaking workshop after being washed. The natural-color bamboo fluff pulp prepared through the technology has the advantages that the technological process is simple, the production efficiency, the production capacity, the finished pulp yield rate and the raw material utilization rate are high, investment is low, adopted chemicals are clean and environmentally friendly, a fluff pulp board has the low bursting strength, flexibility, comfort and elasticity are achieved, the liquid absorbing property is good, raising and dissociating are easily achieved, dust is little, and the hygienic indexes such as the good bacterium inhibiting property, antibacterial property and antianaphylaxis meet the requirement.

The invention relates to a cleaning solution and particularly relates to a cleaning solution for an engine. The cleaning solution is prepared from the following substances in parts by weight: 15-25 parts of coconut high-carbon fatty alcohol polyoxyethylene ether, 18-25 parts of polyoxyethylene nonylphenol ether, 3-5 parts of polyisobutene amine, 2-5 parts of methacrylic acid, 15-25 parts of fatty alcohol polyoxyethylene ether sulfate, 3-5 parts of potassium polyoxyethylene laurylether phosphate MAEPK, 1-5 parts of ethylene oxide-propylene oxide copolymers, 25-45 parts of sulfonated castor oil, 0.05-0.08 part of an ethylene glycol-ethyl ether mixed solution, 4-6 parts of sodium silicate, 15-25 parts of ethyl acetate and 45-55 parts of water. The cleaning solution for the engine, disclosed by the invention, can generate a great number of randomly moving colloidal suspended particles together with oil stains, dust, oil dirt and rust in the engine after being added into the engine so as to emulsify and decompose dirt and the like; and due to the addition of a great deal of dispersing agent, the dispersed particles cannot be caked and can be dispersed into an organic solvent so as to be directly discharged out of the engine.

The use of an adhesion-promoting additive combination composed of one or more polyalkylenoxides out of the group comprising polypropylene oxides and ethylene oxide-propylene oxide copolymers, and of one or more starch ether derivatives out of the group comprising carboxyalkyl starch ethers and their alkali salts, and hydroxyalkyl starch ethers, in mortar compositions comprising mineral binders and water-redispersible polymer powders.

The invention relates to a test strip for detecting low-density lipoprotein cholesterol in serum. The test strip includes a dry chemical reaction chip, the dry chemical reaction chip is prepared by soaking a reagent pad in a chemical reagent and then drying the reagent pad, and the chemical reagent is prepared from cholesterol esterase, cholesterol oxidase, peroxidase, metal salt, a color developer, polyoxyethylene ether and an ethylene oxide-propylene oxide copolymer having preferable concentrations according to a preferable ratio. The test strip has the advantages of low cost, easiness in preparation and obtaining, quickness in reaction and convenience in operation.