3171 results about "Polyvinyl acetate" patented technology

An interlayer film for laminated glass with sound-absorbing properties contains at least two individual films, wherein the first individual film comprises a polyvinyl acetal with a portion of polyvinyl acetate groups of 0.1 to 11 mol % and a second individual film comprises a polyvinyl acetal with a portion of polyvinyl acetate groups of between 5 and 8 mol %.

A cementitious article and a method of making a cementitious article are disclosed. The cementitious article comprises a cementitious component that comprises a polyvinyl acetate type polymer, a monobasic phosphate, and optionally boric acid. Cementitious articles, such as board, are prepared such that the polyvinyl acetate type polymer, the monobasic phosphate, and optionally boric acid can be present in the cementitious core, and/or in dense layers if present. The concentration of the polyvinyl acetate type polymer, monobasic phosphate, and optionally boric acid in the cementitious article can increase from a central region A to peripheral regions B and C, respectively. In some embodiments, the polyvinyl acetate type polymer is a polyvinyl alcohol and the monobasic phosphate is monoammonium phosphate.

A composition and method for improving the fluid efficiency of many oilfield treatments is given. The composition is a solid additive, in a viscosified fluid, in a size range small enough that it enters formation pores; it optionally bridges there to form an internal filter cake, and then decomposes to provide a breaker for the viscosifying system for the fluid. Examples of suitable additives include waxes, polyesters, polycarbonates, polyacetals, polymelamines, polyvinyl chlorides, and polyvinyl acetates. Degradation of the additive may be accelerated or delayed.

The present invention relates to a new-type thermosol using attapulgite as additive and its preparation method. Its composition includes: main body resin ethylene and polyvinyl acetate copolymer EVA, etc. 20-50%, tackifying resin 20-50%, diluent 10-30%, attapulgite 2-40% and anti-oxidant 0.1-1%. Its preparation method includes the following steps: firstly, melting diluent, adding main body resin, when the main body resin basically molten, progressively adding tackifying resin and making reaction for 0.5-1.5 h at 130-180 deg.C, then adding attapulgite and anti-oxidant, further reacting for 0.5-1 hr., discharging material, forming and granulating so as to obtain the invented product.

The invention discloses a protein-based wood adhesive which is characterized by being made of the following raw materials in part by weight: 100 parts of water, 5 to 50 parts of protein-containing raw materials, 10 to 14 parts of polyamide epichiorobydrin (PAE), 5 to 15 parts of modifier, 1 to 15 parts of acidity regulator, 0 to 15 parts of stabilizer, 0 to 10 parts of humectant, 0 to 10 parts of anti-freeze, 0.1 to 10 parts of preservatives, 0 to 10 parts of mold inhibitor, 0 to 10 parts of enzyme inhibitor, and 0 to 10 parts of filling. The protein-containing raw materials contain over 10% of coarse protein, and the modifier is one of or a mixture of several of polyacrylamide, polyvinyl alcohol, polyvinyl acetate, borax, ammonium thiosulfate, carbamide and isocyanate. The invention also discloses a preparation method of the protein-based wood adhesive. The invention adopts common chemical materials and adopts a break-through normal-temperature material-mixing technique, which uses water as solvent. The adhesive has the advantages of high stickiness, evenness and convenience in adhesive application and stable product quality.

A method of preparing a crimped tow of cellulose acetate filaments comprising the steps of: a) providing cellulose acetate dope b) forming filaments (23) from the dope c) applying at least one additive to the filaments d) crimping the filaments to form a crimped tow wherein the at least one additive is capable of removing a component from cigarette smoke. Preferably, the component is a Hoffmann analyte. The additive may comprise a solution, liquid, emulsion or particulate material or combinations thereof. Preferably, the additive comprises an acidic compound or an alkaline compound. The additive may comprise malic acid, potassium carbonate, citric acid, tartaric acid, lactic acid, ascorbic acid, polyethyleneimine, cyclodextrin, sodium hydroxide, sulphamic acid, sodium sulphamate, polyvinyl acetate and carboxylated acrylate, carbon, silica, zeolite, clay, alumina, metal, molecular sieves or an ion exchange resin. The product tow can be processed on standard equipment to make efficient filter rods from which cigarette filter tips can be made which give significantly increased and selective retention of key smoke constituents.

Recyclable and repulpable coated paper stock, preferably for use as ream wrap, comprising a substrate coated on at least one surface with a base coat and at least one additional coat over said base coat. Both coats are water based dispersions of a polymer selected from the group consisting of acrylic polymers, acrylic copolymers, polyvinyl acetate, polyvinyl alcohol, ethylene-vinyl acetate, polyvinyl chloride, styrene butadiene copolymers, polyvinylidiene chloride and its copolymers, or starch. The wax free coating forms a pin-hole free continuous film on the substrate which is resistant to water and water vapor. The invention also includes processes for making and recycling the invented coated paper stocks.

The invention discloses a mildewproof preservative film and a preparation method thereof. The mildewproof preservative film comprises a base layer and a mildewproof preservative coating arranged on the base layer, wherein the mildewproof preservative coating is prepared from a mildewproof preservative paint. The mildewproof preservative paint comprises the following components in percentage by weight: 20-60% of resin, 30-70% of solvent, 0.5-10% of mildew preventive and 0.3-5% of aid. The resin is composed of at least one of polyurethane, an acrylate copolymer, polyvinyl alcohol, polyvinylidene chloride, modified polyvinylidene chloride, an ethylene-vinyl acetate copolymer, a polyvinyl acetate copolymer and a vinyl acetate-butyl ester copolymer; and the solvent is composed of at least one of water and ethanol. The mildewproof preservative coating of the mildewproof preservative film has the advantages of compact surface and no void; and by adding the mildew preventive, the mildewproof preservative coating has the favorable effects of keeping the moisture constant and preventing mildewing. The mildewproof preservative film is especially suitable for preserving fruits, bread, tobacco and other foods which have shorter storage period, can easily mildew in a short time and need to be eaten in time.

A semi-synthetic platelet gel comprising a platelet-rich plasma, at least one platelet activator, and a biocompatible polymer selected from the group comprising carbomers, polyalkylene glycols, poloxamers, polyesters, polyethers, polyanhydrides, polyacrylates, polyvinyl acetates, polyvinyl pyrrolidones, polysaccharides, and derivatives thereof. A method for preparing a semi-synthetic platelet gel comprising the steps of (a) mixing a platelet-rich plasma with at least one platelet activator, and, before the start of clot formation, (b) adding the mixture thus obtained to a biocompatible polymer selected from the group comprising carbomers, polyalkylene glycols, poloxamers, polyesters, polyethers, polyanhydrides, polyacrylates, polyvinyl acetates, polyvinyl pyrrolidones, polysaccharides, and derivatives thereof.

The invention provides a method for preparing a cellulose nanocrystal/electrostatic spinning nanofiber filter film. The method is characterized in that the prepared cellulose nanocrystals of which the diameter is 3 to 10nm are coated on the surface of an electrostatic spinning nanofiber film to form a network structure so as to filter out impurities in raw water, intercept suspended solids, colloid, bacteria and the like in the water and effectively adsorb residual chlorine and heavy metal in the water; and therefore, the aim of purifying water quality can be fulfilled. Moreover, due to the adoption of a multi-layer compounded mode, the mechanical strength of the nano fiber film can be improved by the cellulose nanocrystals, so that the filter film has the advantages of simple structure, high mechanical strength, good filtering effect, low cost and the like, and has wide application prospect in the fields of drinking water purification, textile dyeing wastewater treatment, polyvinyl acetate (PVA) slurry recycling and the like.

This invention is directed to novel pigments, pigment systems (including components not classified as pigments) and formulations for use in an aqueous coating system applied onto cellulosic (paper and/or paperboard) and non-cellulosic substrates (polyethylene (PE), polylactic acid (PLA), polyvinyl acetate (PVAc), etc.) to impart barrier properties.

A heat tolerant, pressure resistant elastomeric composition comprising a blend of a first ethylene-vinyl ester copolymer and a second copolymer selected from the group consisting of chlorosulfonated polyethylene (CSM), chlorinated polyethylene (CPE), polychloroprene (CR), ethylene-acrylic elastomer (AEM), alkyl-acrylate copolymer (ACM), polyvinyl acetate (PVA), nitrile-butadiene rubber (NBR), hydrogenated nitrile-butadiene rubber (HNBR), and mixtures thereof, a hose manufactured therefrom; and a method for preparing the hose are described.

The invention provides a pyromellitic dianhydride catalyst and a preparation method thereof, relates to a catalyst and the preparation method and solves the problems of low catalyst yield and low selectivity of the conventional gaseous oxidation method for preparing pyromellitic dianhydride. The catalyst consists of an active ingredients and a carrier, wherein the active ingredients consist of V2O5, TiO2, P2O5, Sb2O3 and alkali metal oxides. The method comprises the following steps of: 1, weighing; 2, adding an antimony source and a vanadium source into oxalic acid solution with stirring to obtain vanadyl oxalate solution; 3, adding a phosphorus source, the antimony source and alkali metal salt into the vanadyl oxalate solution, uniformly mixing, then adding a titanium source, adding polyvinyl acetate emulsion and then pulping and grinding to obtain size; and 4, adding the carrier into a revolving drum of spray painting equipment, heating and spraying the size on the carrier, putting into a Muffle furnace to carry out air purge and cooling to obtain the catalyst. The catalyst is used for catalysis and preparation of pyromellitic dianhydride.

A solid pharmaceutical composition containing pregabalin is described. The composition includes a matrix forming agent and a swelling agent and is suitable for once daily oral administration. Exemplary matrix forming agents include mixtures of polyvinyl acetate and polyvinylpyrrolidone, and exemplary swelling agents include cross-linked polymers of polyvinylpyrrolidone.

The invention discloses a water-insoluble medicine sustained-release pellet, a sustained-release orally disintegrating tablet thereof and a preparation method thereof. The water-insoluble medicine sustained-release pellet comprises a hollow pellet core, a medicine layer, an insulation layer and a sustained-release layer, wherein the sustained-release layer comprises the following ingredients: 54 to 88 percent of sustained-release materials, 2 to 30 percent of antitackiness agents and 1 to 30 percent of pore-foaming agents, wherein the percentage is the mass percentage in the sustained-release layer, wherein the sustained-release materials are one kind or several kinds of materials selected from ethyl acrylate and methyl methacrylate copolymers, polyvinyl acetate and ethyl cellulose. Through regulating the coating combinations and filling auxiliary materials to be pressed into orally disintegrating tablets, the medicine can be slowly released for more than 8 to 13 hours, so the stable blood medicine concentration can be maintained, the side effect is reduced, the medicine taking times can be reduced, and the medicine taking is convenient. The invention conforms to zero-grade release, has the advantages of high final accumulated medicine release amount, high efficacy, strong selectivity, good mouth feeling, simple production steps and high efficiency, and can be applied to large-scale production.

A transfer roll cover has an inner surface made of conductive and elastic material to fit snugly around and make conductive contact with a transfer roll, and an outer surface made of looped yarns which are attached to the inner surface and have outer looped ends which make light rolling contact with a sheet transported over the transfer roll. The looped yarns are a composite of a cleaning yarn for cleaning particulate contaminants and an antistatic yarn for removing static charges from the transported sheet. In a preferred embodiment, the transfer roll cover has an inner surface made of nylon knitted yarn as a base yarn that holds the cover together and a LYCRA TM inlayed yarn which has an elasticity that allows the cover to stretch over and fit snugly onto the transfer roll. As an alternative, a heat-shrinkable polyvinyl acetate (PVA) yarn may be used as the elastic material. The preferred outer surface includes rayon knitted yarn with looped outer ends as the cleaning yarn, and BEKINTEX TM conductive knitted yarn with looped outer ends as the antistatic yarn.

The invention provides a polymer lithium ion battery core outer package forming material, and aims at providing a battery core outer package forming material with the advantages that the blocking performance is very high, the cold punching forming performance is good, and puncture resistance, electrolyte resistance stability and organic solvent and high-volatile substance resistance can be realized. An outer resistance layer lamination layer body is formed by at least one layer of heat resistance resin film: any one material from polyethylene glycol terephthalate (PET), biaxially oriented polyamide (BOPA) and polyethylene naphthalate (PEN) or coexistence of two materials from PET, BOPA and PEN through co-extrusion compounding, aluminum foils in a resistance permeation layer lamination body at least comprise 0.9 weight percent to 1.5 weight percent of Fe, a high-resistance layer lamination body comprises a base layer, a function layer and a hot sealing layer, the base layer is a co-polymer film formed by paired compounding or the combination of at least two kinds of film substrates in polystyrene (PP), chlorinated polypropylene (CPP), polyurethane (PE), PET, polyamide (PA) or metaxylylene diamine (MPE) elastic body polymer blends, polyvinyl dichloride (PVDC), ethylene vinyl silane (EVOH), PEN and transpeptidase (GT), and a high-resistance water-resistance modified polyvinyl acetate (PVA) coating film is respectively coated on the co-polymer film substrate. The polymer lithium ion battery core outer package forming material revolutionarily solves the electrolyte resistance stability problem.