39 results about "Vinylacetic acid" patented technology

The present invention relates to a polymer blend containing of at least two different hydrogenated nitrile rubbers and at least one olefin-vinylacetate or olefin-acrylate rubber, a rubber compound containing said polymer blend and at least one filler, a curable rubber compound containing said rubber compound and at least one vulcanization agent and a shaped article containing said rubber compound.

The adherent coating of the invention comprises a stabilizing polymer together with an active agent (a hydrophilic polymer and/or a bioactive agent) in a layer bonded to the surface of a medical device. This invention encompasses the coating liquids used for coating medical devices, methods of coating the devices, and the coated devices. The stabilizing polymer is selected to entrap the active agent in a coating that has a high degree of flexibility and has improved bonding to a wide variety of substrates. Preferred stabilizing polymers are cross-linkable acrylic and methacrylic polymers, ethylene acrylic acid copolymers, styrene acrylic copolymers, vinyl acetate polymers and copolymers, vinyl acetal polymers and copolymers, epoxy, melamine, other amino resins, phenolic polymers, copolymers thereof, and combinations.

The invention provides a method for preparing a filling leather fatliquoring agent, comprising the following steps: (1) a component A and a component B or a component A, a component B and a component C undergo copolymerization in the presence of initiators, wherein the component A is at least one of natural oil containing unsaturated fatty acid, long carbon chain unsaturated fatty acid, ester of long carbon chain unsaturated fatty acid and long carbon chain unsaturated fatty acid amide; the component B is at least one of acrylic acid, methacrylic acid, ethyl acrylic acid, maleic acid, fumaric acid, glutaconic acid, vinyl acetic acid, maleic anhydride and glutaconic acid anhydride; and the component C is at least one of styrene, vinylacetate, vinyl propionate, acrylate, methacrylate, acrylamide and methacrylamide; (2) alkali is added in polymers generated after copolymerization to undergo neutralization reaction with the polymers; and (3) the neutralized polymers are mixed with the natural phospholipids. The method is economical and environmentally friendly.

In a process for producing 1-substituted-3-fluoroalkyl-pyrazole-4-carboxylate (3) by a reaction of 2-alkoxymethylenefluoroacylacetate (1) and hydrazine (2), the reaction is conducted in the presence of a base and water, to produce 1-substituted-3-fluoroalkylpyrazole-4-carboxylate (3) with high selectivity and yield. This novel process enables to produce 1-substituted-3-fluoroalkylpyrazole-4-carboxylate (3), which is useful as an intermediate for pharmaceuticals and agrochemicals, with high selectivity and yield by simple and safe operations.

A polishing pad has one or more polishing elements made from a hydrogel material having an intrinsic ability to absorb water. The hydrogel material may or may not have micropores, but has a water absorption capability of 4%-60% by weight, a wet tensile strength greater than 1000 psi, a flexural modulus greater than 2000 psi, and a wet Shore D hardness between 25-80, inclusive. The hydrogel material may be made from one or a combination of the following moieties: urethane, alkylene oxides, esters, ethers, acrylic acids, acrylamides, amides, imides, vinylalcohols, vinylacetates, acrylates, methacrylates, sulfones, urethanes, vinylchlorides, etheretherketones, and/or carbonates.

An ornamental accessory for a fingernail comprises an overlay having a reusable pressure-sensitive adhesive layer pre-applied to a bottom surface thereof for application and bonding to the wearer's natural nail, and a method of making the same. The adhesive formulation is a copolymer of acrylic ester and vinyl acetate formed from an aqueous acrylic copolymer emulsion. The bottom surface of the overlay to which the adhesive is applied is textured to enhance adhesion of the adhesive layer. A method for forming a pre-glued ornamental fingernail accessory includes the steps of forming an overlay having the shape and size of a natural fingernail and applying an aqueous copolymer emulsion, as described above, to a bottom surface of the overlay. The emulsion is allowed to cure whereby a substantial portion of the water in the emulsion is evaporated to form a reusable pressure-sensitive adhesive layer fixed to the overlay. The pressure-sensitive adhesive layer is reactivated by adding an aqueous solution to the dried aqueous copolymer emulsion.

Methods for dispersing foulants are disclosed herein. Various effective dispersant compositions are also disclosed. The dispersant composition can include a silt dispersant and a hydrocarbon dispersant. Generally, the silt dispersant can be a homopolymer or a copolymer of one or more monomers, and the monomers can be one or more of acrylic acid, methacrylic acid, α-halo acrylic acid, maleic acid, itaconic acid, vinyl acetic acid, allyl acetic acid, fumaric acid, β-carboxylic acrylate, and their salts. The silt dispersant can also be a terpolymer of acrylic acid, acrylamide, and sulfonated acrylamide. The hydrocarbon dispersant can be a non-ionic surfactant or a nonylphenol or a nonylphenol ethoxylate, such as a high EO 9 Nonyl phenol resin. Also disclosed are methods for preventing or reducing fouling in equipment that contacts water used during a hydrocarbon production process.

The present invention is an above-critical coating composition comprising an aqueous dispersion of polymer particles, pigment particles, and extender particles wherein the polymer particles comprise from 80 to 99.8 weight percent structural units of vinyl acetate and from 0.1 to 6 weight percent structural units of a phosphorus acid monomer. The composition shows surprisingly improved hiding with increased particle size of the polymer particles.

The invention relates to a long-acting wire rope hemp core grease. The long-acting wire rope hemp core grease comprises 13-17wt% of palm wax, 16-19wt% of microcrystalline wax, 15-19wt% of naphthenic high-viscosity oil, 24-28wt% of paraffinic high-viscosity oil, 1.6-4.6wt% of zinc dialkyl dithiophosphate, 1.4-4.4wt% of nonyldiphenylamine, 4.5-8.5wt% of vinylacetic acid, 8.5-12.5wt% of polyisobutylene and 0.1-1wt% of calcium sulfonate. Compared with hemp core greases in the prior art, the long-acting wire rope hemp core grease has the advantages of high dropping point, no flowing in hot weather, fast online solidification after rope immersion, no loss, energy saving, no pollution to environment, large kinematic viscosity data, good adhesiveness, and realization of good fluidity and no flowing of a grease film in the motion and compressed processes. Prominently, the property of traditional hemp core greases (including imported hemp core greases) is changed to become weakly alkaline (the free base value is not greater than 0.15, NaOH%), so oxidation is effectively inhibited, generated free acids are neutralized, SH/T0325 oxidation stability test and SH/T0331 corrosion test are extremely well passed, the safe service life of a wire rope is effectively prolonged, and use environment is purified.

Synthetic hydrotalcites of the general formula:

[M²⁺_1-xM³⁺_x(OH)₂]^x+[Aⁿ⁻_x/n·mH₂O]^x−

where M²⁺ is a divalent cation, M³⁺ is a trivalent cation and Aⁿ⁻ is an organic anion selected from straight chain carboxylates of C₁₆-C₁₈ acids, carboxylates of aromatic acids, carboxylates of acrylic acid, unsaturated carboxylates of methacrylic acid and unsaturated carboxylates of vinylacetic acid are disclosed, along with methods of synthesis and uses.

The invention belongs to the field of polypeptide drug preparation methods, and relates to a synthesis method of carbetocin. The synthesis method of carbetocin comprises the following steps of (1) using Rink Amide MBHA Resin as a carrier, performing swelling treatment, and then, sequentially coupling protected Gly, protected Leu, protected Pro, protected Cys, protected Asn, protected Gln, protected Ile and protected Tys to swell Rink Amide-MBHA Resin through a condensation reaction, and performing drying to obtain peptide resin 1; (2) performing reaction on the peptide resin 1 with vinylaceticacid to obtain peptide resin 2; (3) cracking the peptide resin 2 to obtain a carbetocin intermediate I; and (4) performing cyclization reaction on the carbetocin intermediate I to obtain the carbetocin. The synthesis method has the advantages of high reaction selectivity, quick reaction, few by-products and impurities, high yield, safety, environment protection, simplicity and easy operation.

The invention discloses a wear-resistant coated wire with stable structure and a preparation method thereof. The wear-resistant coated wire comprises a wire matrix and a coating. The coating comprises nanometer silica, nanometer calcium carbonate, vinyl acetate, vinyl butyl acetate, polyvinyl alcohol, epoxypropane, polyethylene wax, cellulose ether, fatty alcohol polyoxyethylene ether, acrylate, polydimethylsiloxane, polyethylether, rare earth, attapulgite, montmorillonite, silicon carbide, polyamide, high-carbon ferro-chrome powder and PAN-based carbon fiber. The wear-resistant coated wire with stable structure disclosed in the invention has the advantages of good wear resistance, adhesion, etc.

An ornamental accessory for a fingernail comprises an overlay having a reusable pressure-sensitive adhesive layer pre-applied to a bottom surface thereof for application and bonding to the wearer's natural nail, and a method of making the same. The adhesive formulation is a copolymer of acrylic ester and vinyl acetate formed from an aqueous acrylic copolymer emulsion. The bottom surface of the overlay to which the adhesive is applied is textured to enhance adhesion of the adhesive layer. A method for forming a pre-glued ornamental fingernail accessory includes the steps of forming an overlay having the shape and size of a natural fingernail and applying an aqueous copolymer emulsion, as described above, to a bottom surface of the overlay. The emulsion is allowed to cure whereby a substantial portion of the water in the emulsion is evaporated to form a reusable pressure-sensitive adhesive layer fixed to the overlay. The pressure-sensitive adhesive layer is reactivated by adding an aqueous solution to the dried aqueous copolymer emulsion.

The invention relates to a composition for treating the surface of concrete or wall papering to improve the moisture proofing and heat insulating property in concrete structure and to allow a far infrared ray useful to precaution and cure kinds of diseases of the human body to be radiated, the crowd living in houses with concrete structure. The composition is prepared by mixing 30-40 wt% of far infrared ray radiating material and 25-40 wt% of rice bran, and pulverizing the mixture to a size of 150-200 mesh; and mixing 30-45 wt% of adhesive with the mixture uniformly. The far infrared ray radiating material is selected from: mica, yellow soil powder, vermiculite, silica and mixture thereof; the adhesive is selected from: an acetic vinyl resin emulsion, an urea resin, a poly(vinyl alcohol), a glue and a OKONG bond and mixture thereof. Moreover, composition also includes charcoal powder.

The invention relates to the technical field of papermaking, and discloses high-tearability CTP plate backing paper and a preparation method thereof. The CTP plate backing paper is prepared from the following raw materials: softwood pulp, hardwood pulp, serinol-methyl acrylate-bis(2-hydroxyethyl)amino(trismethylol)methane copolymer and vinylacetic acid, wherein the mass ratio of the softwood pulpto the hardwood pulp is 5-8: 1; the dosage of the serinol-methyl acrylate-bis(2-hydroxyethyl)amino(trismethylol)methane copolymer is 2.0-2.5% of the total dry weight of the softwood pulp and the hardwood pulp; the dosage of the vinylacetic acid is 0.5-0.8% of the total dry weight of the softwood pulp and the hardwood pulp. According to the CTP backing paper, the serinol-methyl acrylate-bis(2-hydroxyethyl)amino(trismethylol)methane copolymer is added into the CTP backing paper, and the surface of the CTP backing paper is grafted with the vinylacetic acid, so that the tearing strength in all directions is effectively improved.

The invention relates to a new synthesis way of vinyl isobutyl acetate, belonging to the field of medicine intermediate synthesis technology. The preparation method of the vinyl isobutyl acetate comprises the steps of: first, using chloropropene and sodium cyanide to prepare allylcyanide under the action of catalyst based on quantitative mixture ratio; after alkaline washing and water washing, leading the allylcyanide to react with isobutyl alcohol and concentrated hydrochloric acid in the water to prepare the vinyl isobutyl acetate; and finally, after alkaline washing and water washing, preparing finished product of the vinyl isobutyl acetate in a layered way. The method has the characteristics of being short in process route, not adopting solvent, being mild in condition, high in yield,easy in implementation of reaction and the like.

The invention belongs to the technical field of polymers, and discloses olefinic acid resin. The resin is obtained by forming a mixed monomer from olefinic acid and olefinic acid ester according to a ratio of (60-80wt%):(20-40wt%) through free radical polymerization. The olefin acid is composed of the following components: 15-35 wt% of vinyl acetic acid, 20-35 wt% of acrylic acid, and 40-60 wt% of butenoic acid. The olefin acid ester is composed of the following components: 10-15 wt% of hydroxyethyl methylacrylate, 5-10 weight percent of acrylic acid-2-hydroxyethyl ester, 30-35 weight percent of 2-propyl ethyl acrylate, and 40-45 wt% of ethyl acrylate. In the pH range of 5.5-6, the auxiliary material can rapidly swell/dissolve, and the swelling/dissolving speed of the auxiliary material is obviously reduced when the pH range is exceeded.