209 results about "Polychloroprenes" patented technology

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.

A rubber track having improved corrosion resistance along the wheel path provided by a polychloroprene layer operatively affixed to the inner surface of the track. The polychlorprene rubber layer may include a polychloroprene rubber selected from WRT type neoprene, W type neoprene, GRT type neoprene, and blends of WRT type neoprene, W type neoprene, and GRT type neoprene.

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.

A flexible, elastic gaiter device designed to doubly encircle an upper rim of a wearer's footwear as well as the wearer's ankle to block ingress of debris into the footwear upper rim while bracing wearer's ankle protecting it against external and internal injury. The device is an elongated generally rectangular article. It comprises a closed loop nylon plush fabric outer layer to which is foamed an inner layer of synthetic rubber based on polychloroprene. At one end of the article's rubbery layer a fastener strip of hook elements is attached. The gaiter device is applied with its rubbery layer bridging the footwear upper rim, and firmly stretched to a double wrap, then secured by fastening the strip of hook elements with the plush outer layer. Lower edge corners of the article are diagonally cropped so that, when stretched, the lower edge will not have unsightly exposed portions.

A vinyl ester composition; a tubular structure such as a hose for conveying fluids in an automotive engine cooler, transmission oil cooler, power transmission cooler, radiator or heater; and a method for preparing the tubular structure are described. The tubular structure includes a single layer of a heat tolerant, pressure resistant, hydrocarbon fluid impermeable composition comprising a copolymer of a first vinyl ester and a second vinyl ester, and one or more additives. The composition may, optionally contain a second polymeric component such as an ethylene-vinyl ester of a C₂ to C₆ carboxylic acid, chlorinated polyolefins, chlorosulfonated polyolefins, polychloroprene, ethylene-acrylic rubber, alkyl acrylate copolymer, polyvinyl acetate, acrylonitrile-butadiene rubber, hydrogenated acrylonitrile-butadiene rubber, ethylene-propylene-diene terpolymer, styrene-butadiene rubber, ethylene-propylene rubber, butyl rubber, cis-polybutadiene, cis-polyisoprene, polyurethane, polyamide and combinations thereof.

The invention discloses a non-asphaltic waterborne spraying rapid hardening rubber waterproof paint which comprises a component A and a component B. The component A comprises the following substances: by weight, 14-25% of an anion butylbenzene emulsion, 18-25% of an anion polyurethane-silicone-acrylate emulsion, 10-15% of an anion polychloroprene emulsion, 0.1-0.3% of a dispersant, 0.1-0.3% of an antifoaming agent, 0.2-0.4% of a nonionic emulsifier, 0.1-0.3% of an anion emulsifier, 3-6% of a low-temperature modifier, and 38-43% of ultrafine powdered steatile. The component B comprises the following substances: by weight, 80-90% of industrial calcium chloride, 3-6% of industrial sodium chloride, and 7-14% of a composite ferro-aluminium polymer. According to the invention, an advanced refrigeration and cold-spray technology is adopted; construction is simple; the whole body has advantages of seamlessness, no stripping and no water breakthrough; and the paint can obstruct various harmful gases, and is a waterproof, antiseep, anticorrosion, chemicals-resistant, anti-cracking, anti-puncturing, damping and noise-reducing protective coating.

Disclosed are a novel polychloroprene copolymer, a soapless polychloroprene latex, and a process for producing the copolymer or latex in a simple manner, which are intended to be used for the improvement in adhesion property and water resistance of a conventional polychloroprene adhesive or the improvement in oil resistance and adhesion property of a conventional styrene-butadiene block copolymer. A chloroprene block copolymer comprising a polymer (A) having the composition represented by the general formula (1) in the description and a chloroprene polymer (B), the polymer (A) being linked to one terminal or both termini of the chloroprene polymer (B), and the total amount of the 1,2-bond and the isomerized 1,2-bond in the chloroprene polymer (B) as measured by carbon-13 nuclear magnetic resonance spectrometry being 2.0 mol% or less; a soapless polychloroprene latex comprising an amphiphilic chloroprene copolymer having a hydrophobic chloroprene polymer and a hydrophilic oligomer or polymer having an acidic functional group attached to the hydrophobic chloroprene polymer and 2 wt% or less of an emulsifying agent; and a process for producing the chloroprene block copolymer or soapless polychloroprene latex.

An object of the present invention is to provide a novel polychloroprene-based copolymer, a soapless polychloroprene-based latex, and a process for producing the same in a simple and convenient manner, which are intended to be used for the improvement in adhesiveness and water resistance of a conventional polychloroprene adhesive or the improvement in oil resistance and adhesiveness of a styrene-butadiene block copolymer.

The invention relates to a chloroprene-based block copolymer comprising a polymer (A) having a composition represented by the following formula (1) and a chloroprene-based polymer (B), the polymer (A) being linked to one terminal or both terminals of the chloroprene-based polymer (B), and the total amount of the 1,2-bond and the isomerized 1,2-bond in the chloroprene-based polymer (B) as determined by carbon-13 nuclear magnetic resonance spectrometry being 2.0 mol % or less; a soapless polychloroprene-based latex comprising an amphipathic chloroprene copolymer having a hydrophobic chloroprene-based polymer and a hydrophilic oligomer or polymer having an acidic functional group linked to the hydrophobic chloroprene-based polymer and 2 wt % or less of an emulsifying agent; and a process for producing the same:

wherein U represents hydrogen, a methyl group, a cyano group, or a substituted alkyl group; V represents a phenyl group, a substituted phenyl group, a carboxyl group, an alkoxycarbonyl group, a substituted alkoxycarbonyl group, an allyloxycarbonyl group, a substituted allyloxycarbonyl group, an acyloxy group, a substituted acyloxy group, an amido group, or a substituted amido group; X represents hydrogen, a methyl group, chlorine, or a cyano group; Y represents hydrogen, chlorine, or a methyl group; Q represents a polymerization residue of maleic anhydride, citraconic acid, maleic acid, fumalic acid, a maleate ester, or a fumalate ester; and k, n, and m each represents an integer of 0 or more.

Water-containing compositions containing polychloroprene particles, zinc oxide particles having an average particle size of less than 150 nm and water. The compositions can be used as adhesives and/or sealants.

Aqueous polymer dispersions based on polyurethanes that include a) at least one polyurethane dispersion having a mean particle size of from 60 to 350 nm, and b) at least one polychloroprene dispersion having a mean particle size of from 60 to 300 nm, and

• • c) at least one aqueous silicon dioxide dispersion having a particle diameter of the SiO₂ particles of from 1 to 400 nm. The dispersion can be prepared by admixing a mixture of b) and c) with a). The dispersions can be used in adhesive compositions.

Apparatus and method for forming sheets, comprising a pair of drums moving a belt to define a path for curing the sheets. Uncured material preferably polychloroprene, is put on the belt and squeezed between the drum and a roller to adjust the thickness of the layer. The drums rotate at a rate to permit the material to cure between the first and the second drum. Ovens cure the polychloroprene, which is removed at the second drum. The sheet has a thickness of from at least 0.004 inches to more than 0.25 inches. A plurality of sources supply material of at least two colors to form a sheet having stripes. Preferred sheets have an elongation to break of about 150% to about 1500%, a tensile strength of about 5 Mpa to about 50 Mpa and a modulus at 300% elongation of about 1 Mpa to about 10 Mpa.

The present invention provides a process for finishing fibrous products with a preparation based on aqueous dispersions of polychloroprene and a process for preparing textile-reinforced and fiber-reinforced concrete and other cement-based products including those finished products.

The invention relates to a preparation method and application of a microbial inoculant for remediating poly-halohydrocarbon-polluted soil, belonging to the technical field of soil remediation in environmental engineering. The invention is characterized in that the microbial inoculant containing the quinone-reducing facultative anaerobe Shewanella sp. and poly-halohydrocarbon dehalogenated product facultative aerobic degrading bacterium is prepared by surplus sludge lysis solution preparation and culture medium optimization, and is used for remediating poly-halohydrocarbon-polluted soil. The microbial inoculant has the advantages of wide raw material sources, simple preparation technique and no secondary pollution during soil remediation, can effectively overcome the defect that the high operating cost of the biologically reinforced remediation of poly-halohydrocarbon-polluted soil limits the large-scale application, and has wide application prospects in remediation of soil polluted by poly-chlorine organic substances, poly-bromine aromatic hydrocarbons and poly-fluorine organic substances.

In the present invention, resin expending on water absorption is prepared by polymerization of synthetic monomer of propenoic acid ester containing polyoxyvinyl ether, catalyst, initiator and cross-linking agent; rubber expending on water contact is prepared from resin expending on water absorption, polychloroprene, filler, softener, promoter and antiager through mixing and valcanizing.

The nonionic polychloroprene latex composition using polyvinyl alcohol as an emulsifying/dispersing agent has good chemical and mechanical stability, but due to high viscosity, there are problems such as restrictions on coating methods and difficulty in achieving high solid content . By emulsion polymerization of chloroprene alone or chloroprene and monomers that can be copolymerized with chloroprene in the presence of polyvinyl alcohol and non-ionic emulsifiers, low viscosity and high solid content can be obtained. Polychloroprene latex compositions.

This invention reveals a conveyor belt which is comprised of a carry cover layer, a tie gum layer which is situated immediately below the carry cover layer, a reinforcement layer which includes steel cords which are embedded in polychloroprene and which is situated immediately below the tie gum layer, and a rubber layer which is situated immediately below the reinforcement layer, wherein the carry cover layer is comprised of a millable urethane rubber. The tie gum layer will typically be an alloy of polyvinylchloride and nitrile rubber to attain good adhesion between the carry cover layer and the reinforcement layer. The subject invention also reveals a conveyor belt which is comprised of a carry cover layer, a reinforcement layer which includes a resorcinol-formaldehyde-latex coated fabric reinforcement, and a rubber layer which is situated immediately below the reinforcement layer, wherein the carry cover layer is comprised of a millable urethane rubber.

The invention relates to low-viscosity, low-monomer aqueous polymer dispersions based on polychloroprene, and a process for the preparation thereof and the use thereof as a contact adhesive.

The invention relates to a technology for polluted soil restoration. Pollutants in soil mainly comprise polycyclic aromatic hydrocarbons and polychlorocarbons. In a biological-chemical-biological treatment restoration order, the pollutants are degraded under suitable conditions.