104 results about "Vinylidene Chlorides" patented technology

Disclosed is a water- and oil-repellent agent comprising the following fluorine-containing copolymer (A). The fluorine-containing copolymer (A) comprises: (a1) a fluoroalkyl group-containing polymerizable monomer of the formula:  wherein Y is a divalent organic group [for example, an aliphatic group having 1 to 10 carbon atoms, an aromatic or cycloaliphatic group having 6 to 10 carbon atoms, a —SO2N(R1)R2— group (in which R1 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R2 is an alkylene group having 1 to 10 carbon atoms), a —CON(R1)R2— group (in which R1 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R2 is an alkylene group having 1 to 10 carbon atoms), or a —CH2CH(OY1)CH2— group (in which Y1 is a hydrogen atom or an acyl group having 1 to 4 carbon atoms)]; and  Rf is a linear or branched fluoroalkyl or fluoroalkenyl group having 1 to 6 carbon atoms; and (a2) vinylidene chloride.

A process for producing 1,1,1-trifluoroethane (HFC-143a) which process comprises reacting hydrogen fluoride with vinylidene chloride along with one or more of 1,1,-dichloro-1-fluoroethane (HCFC-141b), 1-chloro-1,1-difluoroethane (HCFC-142b) and 1,1,1-trichloroethane (HCC-140a) in the presence of pentavalent antimony as a fluorination catalyst under conditions to produce 1,1,1-trifluoroethane (HFC-143a), generally in yields of 90% or more.

The invention provides a polyvinylidene chloride-acrylate copolymer emulsion for a water-based metal anti-corrosion coating and a synthetic method thereof. The copolymer emulsion is prepared from, byweight, 40-50 parts of mixed monomer, 0.2-0.25 part of an initiator and 0.4-0.5 part of emulsifier, wherein the mixed monomer is prepared from 15% of acrylic ester, 5% of acrylic acid and 80% of vinylidene chloride, the initiator is prepared from potassium persulfate, and the emulsifier is prepared from 20% of sodium lauryl sulfate and 80% of 1-allyl-2-sodium hydroxy alkanesulfonate. The preparedpolyvinylidene chloride-acrylate copolymer emulsion for the water-based metal anti-corrosion coating is high in toughness and adhesive force, and good in storage stability, salt spray resistance, corrosion resistance and other comprehensive performance.

A stretched laminated film and bag is provided, in which a packaging operation in thermal shrinkage packaging is effectively performed without the occurrence of fusion and the like between margins when sealing via heat-sealing with a margin portion of an adjacent bag in a layered state, and without of bag whitening in a thermal shrinkage process thereafter. Specifically, a stretched laminated film has at least four layers of: a surface layer (A), an adhesive layer (A), a barrier layer, and a surface layer (B) sequentially laminated in order thereof, in which the melting temperature of the surface layer (A) is only increased no less than 65° C. to no more than 150° C. higher than the melting temperature of the surface layer (B), and the barrier layer is composed of a vinylidene chloride copolymer, and the melting temperature of the barrier layer is no less than 130° C. to less than 160° C.

An article includes a substrate and a top-coat having a first side disposed on and in direct contact with the substrate and a second side that is outermost and exposed to the environment. The top-coat includes a first polymer chosen from acrylic polymers, acrylonitrile butadiene, butyl rubber, cellulose acetate, cellulose butyrate, epoxy resins, ethylene-vinyl acetate copolymers, modified ethylene-vinylacetate, vinyl acetate copolymers, ethylene-(meth)acrylic acid ionomers, vinylidene chloride copolymers, ethylene-(meth)acrylate copolymers, polyesters, natural rubber, neoprene, phenolic polymers, polyurethanes, polyvinyl acetate, polyvinyl alcohol, styrene butadiene rubber, casein, dextrin, starch, polysaccharides, copolymers of two or more thereof and combinations of two or more thereof; and combinations of any two or more thereof, a second polymer different than the first polymer and chosen from ethylene-acrylic acid copolymers, oxidized polyethylenes, ethylene-vinyl acetate copolymers, oxidized ethylene-vinyl acetate copolymers, maleated polyolefins, homopolymers of polyethylene, homopolymers of polypropylene, and combinations of any two or more thereof, and water.

The invention relates to a modified PVDC polymer. Monomers of the modified PVDC polymer comprise vinylidene chloride, dichloroethylene, glycidyl methacrylate and a cationic monomer, the modified PVDC polymer is obtained through a suspension polymerization method, and an adopted dispersing agent is a compound of water-soluble cellulose and polyvinylpyrrolidone. The prepared PVDC polymer is moderate in molecular weight distribution, and non-uniformly distributed chain segments can play a role in internal plasticization. The biological rotating disc prepared by the invention is waterproof and corrosion-resistant, the phenomena of disintegration, corrosion and the like cannot occur when the biological rotating disc is used in wastewater treatment under a wide pH condition for a long time, and the mechanical strength is basically not reduced. When the modified PVDC polymer disclosed by the invention is used for preparing a biological rotating disc material, a plasticizer does not need to be added, so that thermal decomposition caused by adding the plasticizer in a processing process is avoided; on the other hand, the stability of the biological rotating disc in water is also enhanced.

The non-fluorinated polymer includes a constituent unit derived from a (meth)acrylic acid ester monomer (A) represented by the following General Formula (A-1); and at least one monomer (E) from between vinyl chloride and vinylidene chloride:wherein in Formula (A-1), R1 represents a hydrogen or a methyl group; and R2 represents a monovalent hydrocarbon group having 12 or more carbon atoms which may have a substituent.

The present invention provides a functional additive transferring (co)extruded thermoplastic food casing having a water vapor barrier and / or oxygen barrier effect wherein an inside surface of the thermoplastic food casing has a textured surface which forms a three-dimensional pattern of higher and lower retaining capacity for a functional additive, wherein the thermoplastic food casing having a textured surface in case of a monolayer casing or an inner layer comprising the inside surface having a textured surface in case of a multilayer casing comprises as a main component at least one thermoplastic polymer material selected from the group consisting of (co)polyamides, (co)polyolefins, (co)polyester and vinylidenchloride (co)polymers, wherein the (co)extruded thermoplastic food casing does not comprise a net and / or a material forming a net or any other three dimensional structure on its outside surface, wherein the average thickness of the thermoplastic food casing in the areas having a higher retaining capacity is in a range of from 1 to 100 μm, wherein the average thickness of the thermoplastic food casing in the areas having a lower retaining capacity is in a range of from 191 to 2000 μm, provided that the thickness difference between the average thickness in the areas having higher retaining capacity and the average thickness in the areas having a lower retaining capacity is in a range of from 160 to 1950 μm and that a ratio of the average thickness of the thermoplastic food casing in the areas having a higher retaining capacity and the average thickness of the thermoplastic food casing in the areas having a lower retaining capacity is in a range of from 0.002 to 0.25.