Showing papers on "Transfer agent published in 1986"

Colloidal stable vinyl halide polymerizations with mercaptan chain transfer agents

Abstract: Polymers of vinyl halides having low molecular weights, good particle characteristics, and improved melt flow are made by aqueous polymerization utilizing an effective amount of a mercaptan as a chain transfer agent, wherein the mercaptan chain transfer agent is mixed with at least one material which is non-polymerizable with vinyl chloride and wherein said non-polymerizable material is substantially insoluble in water and is miscible with said mercaptan to form a chain transfer composition, and said chain transfer composition is added before the start of the polymerization while maintaining colloidal stability.

Transfer metallization process

Abstract: 1. Transfer metallizing process, in which a metallic layer is applied to a transfer agent (2) and transferred from said transfer agent to a manufactured article by lamination (6, 6') followed by delamination (7, 7'), whereby said transfer agent (2) comprises biaxially draw-oriented and heat-set polypropylene film or polyester film, the polyester film is coated with an easily removable lacquer prior to use ; a hotmelt medium (4) is interposed between said metallic layer (3) of the transfer agent and that surface of the manufactured article (1), to which the layer is to be applied ; the manufactured article (1) and the transfer agent (2) provided with the metallic layer (3) are united by lamination ; and finally the transfer agent (2) is peeled off from the resulting laminate (1, 3, 4).

Production of methacrylic resin having improved resistance to thermal decomposition

Abstract: PURPOSE:To obtain the titled resin useful as parts for automobiles, having improved resistance to thermal decomposition, molding and processing properties, transparency and heat distortion resistance without damaging productivity, by polymerizing methyl methacrylate by the use of both specific radical polymerization initiator and a chain transfer agent. CONSTITUTION:In polymerizing methyl methacrylate alone or a monomer mixture containing >=50wt% methyl methacrylate and a monomer such as ethyl acrylate, etc., 0.01-2wt% based on the monomer weight of a peroxide (e.g., lauroyl peroxide, etc.) or azo compound (e.g., azobisisobutyronitrile, etc.) is used as a polymerization initiator, and 0.02-3wt% based on the monomer of a polyfunctional mercaptan (e.g., thioglycolic ester of pentaerythritol, etc.) as a chain transfer agent, to give the aimed resin.

Graft copolymer, process for its production and composition containing it

Abstract: A conjugated diene, such as 1, 3-butadiene, and an alkenyl aromatic compound, such as styrene, are graft or over copolymerized on a dissolved or finely divided anionic, fully caustic-treated soy protein in an aqueous alkaline medium, using effective amounts of an oil-soluble azo catalyst, a chelating agent and a transfer agent to form a latex, which can be used in paper coating compositions.

Liquid aliphatic resins

Abstract: A light color aliphatic hydrocarbon petroleum resin including a piperylene component and a chain transfer agent component useful as a tackifying agent, especially with copolymers. The resin of the invention has a softening point of about 0°-40° C., a number average molecular weight of from 100 to about 900, a low Gardner color of about 3 or less, and is formed by the aluminum chloride catalyzed polymerization of a feed stream essentially free of butadiene.

Production of macromonomer having polycondensation property

Abstract: PURPOSE: To obtain the titled high-purity monomer capable of producing molded articles having excellent physical properties, by radically polymerizing a radically polymerizable vinyl group-containing monomer in the presence of a chain transfer agent containing an alkyl ester group. CONSTITUTION: A radically polymerizable vinyl group-containing monomer (e.g. vinyl acetate, styrene, acrylonitrile, etc.) is radically polymerized in the presence of a chain transfer agent (e.g. dialkyl mercaptomalonate, dialkyl thiomalate, etc.) containing two alkyl ester groups to give a monomer containing an end structure shown by formula (R is alkyl) and having 2,000W15,000 number- average molecular weight and polycondensation properties. The average molecular weight of the macromonomer can be readily controlled. COPYRIGHT: (C)1988,JPO&Japio