103 results about "Vinylidene Chlorides" patented technology

The present invention relates to water-thinned PVDC latex, and is especially a kind of water-thinned PVDC latex for painting special cloth and its preparation process. The water-thinned PVDC latex is prepared with mixed monomer through emulsion polymerization in the presence of emulsifier and initiator. The mixed monomer includes vinylidene chloride 75-90 %, acrylate monomer 8-20 % and unsaturated fatty acid 1-5 %. The water-thinned PVDC latex is used in treating non-woven fabric, and the treated non-woven fabric is hard, elastic, waterproof, heat resistant and crease resistant and may be used widely. In addition, the water-thinned PVDC latex has excellent compatibility with acrylic acid emulsion.

A core-shell emulsion polymer comprising

• • A) a core composition comprising components (a) and (b):
    • (a) from about 40 to about 95% of styrene, alkyl substituted styrene, or alkyl (meth)acrylate; and
    • (b) from about 5 to about 60% of vinylidene chloride, vinyl chloride, or combinations thereof; and
  • B) a shell composition components (c) and (d):
    • (c) from about 50 to about 85% of
      • (I) R_f¹(CH₂)_m Z-C(O)—C(R¹)═CH₂
      • (II) R_f²(CH₂CF₂)_q(CH₂CH₂)_rZ-C(O)—C(R¹)═CH₂, or
      • (III) R_f³O(CF₂CF₂)_q(CH₂CH₂)_rZ-C(O)—C(R¹)═CH₂

wherein

R¹ is hydrogen, Cl, F or CH₃;

Z is —O—, —NH— or —S—;

R_f¹ and R_f² are each a C₄ or C₆ perfluoroalkyl; and

R_f³ is a C₂ to C₇ perfluoroalkyl optionally interrupted by one to three ether oxygens; and

• (d) from about 15 to about 50% of styrene, alkyl substituted styrene, or alkyl (meth)acrylate,

provided that i) the core composition comprises from about 20 to about 75% of the polymer; ii) when R_f¹ or R_f² has 4 carbons, R¹ is CH₃; and iii) when R_f³ has 2 or 3 carbons, R¹ is CH₃.

The invention provides an online-coated modified biaxially-oriented polyester film, a preparation method therefor and use of the online-coated modified biaxially-oriented polyester film. According tothe modified biaxially-oriented polyester film, a single face or both faces of a polyester base film have coatings, the coatings are obtained through coating surfaces of the polyester base film with aqueous coating liquid and then carrying out volatile drying, the aqueous coating liquid comprises water-soluble resin, a curing agent, a surfactant, chitosan and functional assistants, and the water-soluble resin is obtained through copolymerizing the following monomers: vinylidene chloride, acrylic acid, alkyl (meth)acrylate, vinyl acetate and acrylic cellulose. After aluminizing, the film provided by the invention is good in barrier property and is particularly suitable for serving as a food packaging material; meanwhile, the adhesive power between the film and an aluminum layer is high, thepeeling strength reaches 8.7N/25mm or more; and due to high fastness of the aluminum layer, a dealuminizing phenomenon does not occur even if under high-heat high-humidity conditions, fire control potential safety hazards and harmfulness to human bodies are greatly reduced, and thus, the film has an obvious environment-friendly significance.

The invention belongs to the technical field of metal anticorrosive coatings and relates to a water-based rust conversion priming paint and a preparation method. The water-based rust conversion priming paint comprises the components of, by weight, 30-60 parts of vinylidene chloride compound macromolecule emulsion, 20-40 parts of color filling slurry, 5-15 parts of 2-hydroxyl propyl-3,4,5-trihydroxybenzoic acid rust conversion agent, 0.05-0.1 part of antifoaming agent and 0.1-0.5 part of thickening agent. The rust conversion agent is good in water resistance, high in stability and excellent in matching with water-based and oil-based paints, and the workability, the conversion efficiency and the corrosion resistance are all relatively high.

The invention discloses a persistent hydrogel patch. The persistent hydrogel patch is composed of a supporting layer, a hydrogel layer and a separation layer, wherein the supporting layer is made of waterproof compound materials which are composed of waterproof materials and basic materials, the hydrogel layer is coated on the surface of the basic materials of the waterproof compound materials, the basic materials are one of non-woven fabric, knitted fabric and woven fabric, the waterproof materials are one or more of polyethylene, polyurethane, thermoplastic polyurethane, polyester, polypropylene, polyvinyl chloride, polyvinylidene chloride, ethylene-vinyl acetate monomer polymer, silicone rubber, polyimide and the like, are shaped like a film, and are compounded with the basic materials through the processes of film laminating, hot rolling, fabric and powder compounding, hot melt adhesive breathable coating and the like, and the waterproof compound materials are formed. The waterproof materials can be fluid or be compounded with the basic materials through the processes of directly coating, curtain coating and the like, and the waterproof compound materials are formed. According to the persistent hydrogel patch, water in the hydrogel layer can be effectively prevented from being scattered through the supporting layer, and the purposes of lengthening the time of keeping good adhesion performance of the hydrogel layer and increasing the transdermal absorption rate are achieved.

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.

The invention relates to a polyvinylidene chloride rust-turning rustproof water-based paint and a preparation technology thereof and belongs to the technical field of chemical coatings. The polyvinylidene chloride rust-turning rustproof water-based paint is characterized by comprising the following components in parts by weight: 50-75 parts of polyvinylidene chloride emulsion, 3-15 parts of modified emulsion, 2.0-5.0 parts of auxiliaries, 0.1-0.5 part of organic silicon flatting agent, 0.1-0.5 part of mineral oil de-foaming agent, 3.0-20 parts of rust-turning agent and 0.5-2.0 parts of chloride ion inhibitor. The processing steps are as follows: adding polyvinylidene chloride emulsion, modified emulsion and auxiliaries at mass ratio into a preparation container and stirring; adding rust-turning agent solution and chloride ion inhibitor solution; continuing to stir after solution is fully added, and then filtering. The invention provides a physically modified universal PVDC emulsion anda technical method. The modified emulsion completely has the basic performance of metallic paint, namely, excellent rustproof performance, and is especially suitable for preparing a rust-turning rustproof water-based paint.

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 invention discloses a hydrogen chloride resistant basic catalyst, a preparation method and application. The basic catalyst comprises a carrier and an active component loaded on the carrier, wherein the carrier is selected from one in SiO2, gamma-Al2O3, SBA-15, active carbon, ZSM-5, MCM-22 and silica aerogel; the active component is selected from one or a combination of more in ionic liquid taking chloride ion as anion; the loading amount of the ionic liquid is 0.1 to 40 percent. The invention provides application of the basic catalyst to reaction in which vinylidene chloride is prepared from 1. 1.2-methyl chloroform gas phase dehydrochlorination. The basic catalyst has the advantages of long service life and high activity.

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.

The invention relates to double-component PVDC latex for a biological rotating disc. A component A comprises the following raw materials in parts by weight: 30-40 parts of vinylidene chloride, 4-7 parts of methoxy polyethylene glycol (methyl) acrylate, 3-5 parts of alkyl (methyl) acrylate, 2-4 parts of glycidyl (methyl) acrylate, 0.1-0.3 parts of an emulsifier and 0.05-0.1 part of an initiator. A component B is prepared from the following raw materials in parts by mass: 30-40 parts of vinylidene chloride, 4-7 parts of methoxy polyethylene glycol (methyl) acrylate, 3-5 parts of alkyl (methyl) acrylate, 3-5 parts of unsaturated carboxylic acid, 0.1-0.3 parts of an emulsifier and 0.05-0.1 parts of an initiator. When the double-component PVDC latex is used, the component A and the component B are sprayed on a three-dimensional net-shaped structure formed by PVDC resin according to a certain mass ratio, and a biological rotating disc material obtained through hot pressing and shaping is stable in structure, good in mechanical strength and high in film forming amount. Compared with latex which is not specially used for a PVDC biological rotating disc, the double-component PVDC latex disclosed by the invention can ensure the strength of the biological rotating disc under the condition of a small dosage.

A carbon molecular sieve (CMS) membrane may advantageously be made by pyrolyzing a membrane precursor composition comprised of a carbon forming polymer (e.g., polyimide) blended with a polyvinylidene chloride copolymer (PVDC), the polyvinylidene chloride copolymer being the reaction product of at least 60% to 97% by weight of vinylidene chloride and at least one other comonomer and the carbon forming polymer to polyvinylidene chloride copolymer has a weight ratio of greater than 1 to 99. The membrane precursor composition may be formed by dissolving the carbon forming polymer and PVDC in a solvent to form a dope solution. The dope solution may be shaped, for example, into an asymmetric hollow fiber. The asymmetric hollow fiber may be heated to a temperature to dehydrochorinate the PVDC and then subsequently heated in a non-oxidizing atmosphere to carbonize the polymers of the shaped membrane to form the CMS membrane.