Stauffer Chemical Company

Arthur J Yu

Donald F Anderson

Jagadish C Goswami

Siegfried Altscher

Ruth E Gallagher

Paul Kraft

Ki-Soo Kim

Joseph Silberberg

Jung Il Jin

Anthony L DiSalvo

Ki Soo Kim

Anthony J Spak

Reaction of a diepoxide with a mono-, or, preferably, dicarboxylic acid yields a prepolymer having both hydroxy and epoxy groups. This prepolymer, when reacted with a polyisocyanate, yields a poly(oxazolidone/urethane) thermoset composition which is substantially free of isocyanurate linkages. The thermoset contains oxazolidone linkages in its backbone which are separated from one another by ester linkages. Urethane linkages are present in side chains attached to the polymer backbone of the thermoset.

Compositions for forming poly(oxazolidone/urethane) thermosets and

Improved copoly(carbonate/phosphonate) compositions formed by reaction of a dihydric phenol, a carbonate precursor, and an organophosphorus dihalide are disclosed. The inherent viscosity and melting point of such compositions is increased by the presence of an effective amount of a chain branching agent, optionally in the additional presence of a chain terminating agent.

Copoly (carbonate/phosphonate) compositions

An internally plasticized vinyl chloride copolymer composition having good low temperature flexibility and tensile properties is disclosed. It consists essentially of from about 45% to about 80%, by weight, vinyl chloride, from about 15% to about 54%, by weight, of a C.sub.2 -C.sub.10 alkyl acrylate, and from about 1% to about 15%, by weight, of one or more C.sub.8 -C.sub.22 dialkyl maleate and/or fumarate. The copolymer is formed using conventional suspension, emulsion, bulk and solution polymerization procedures.

Internally plasticized vinyl chloride copolymer composition

Polyester compositions containing an effective amount for flame retardancy of a copolymer of (1) benzene phosphorus oxydichloride, (2) 2,4'-thiodiphenol, 4,4'-thiodiphenol, 2,4'-sulfonyl diphenol, 4,4'-sulfonyl diphenol or mixtures thereof, and (3) POCl.sub.3 are disclosed.

Polyester composition containing a benzene phosphorus oxydichloride, a

Crosslinked polyvinyl chloride foams are formed by first expanding a polyvinyl chloride containing plastisol comprising a blowing agent, and a reactive crosslinking plasticizer to form a foamed composition and then subjecting the foamed composition to irradiation to crosslink the foamed composition via the crosslinking plasticizer.

Process for forming a crosslinked polyvinyl chloride foam and product

Polymerization of vinyl chloride monomer, by either suspension or emulsion polymerization, optionally in the presence of a monoethylenically unsaturated comonomer, is carried out in the presence of a mixture of calcium and zinc acrylate. The presence of the calcium and zinc acrylate yields a more thermally stable product and reduces the amount of polymer scale formation during polymerization. A further improvement in thermal stability is achieved by conducting the polymerization with the added presence of an epoxy compound containing a reactive vinyl or allyl group.

Internally stabilized vinyl chloride polymers comprising calcium and

Blends of a polycarbonate resin and an interpolymer modifier comprising crosslinked (meth)acrylate, crosslinked styrene-acrylonitrile, and uncrosslinked styrene-acrylonitrile polymeric components are disclosed. The blends have improved processing as compared to the processing characteristics of the polycarbonate resin alone and are impact resistant. They are more weather resistant than blends of the polycarbonate resin and ABS graft copolymers.

Blends of a polycarbonate resin and interpolymer modifier

Process for the polymerization of vinyl chloride in the presence of

The use of an anthraquinone sulfonate as an additive in an aqueous suspension or emulsion medium containing a vinyl chloride monomer substantially reduces the formation of polymer scale which is normally deposited on the inner walls of the polymerization vessel after a suspension or emulsion polymerization has been conducted.

Method for the preparation of polyvinyl chloride by suspension or

The gel time of unsaturated polyester thermosetting resins containing polymerizable vinyl monomers, such a styrene, and a vinylphosphonate flame retardant, such as the bis(hydrocarbyl)vinylphosphonates, which normally retards the gel time of such resins, is reduced by the addition of an effective amount for gel time reduction of maleic anhydride.

Method of reducing gel time of polyester thermoset resins and product

Flame retardant polymers of benzene phosphorus oxydichloride and 4,4'-thiodiphenol are disclosed which are preferably formed by reacting these monomers in an inert organic solvent at ambient temperature in the presence of an amine acid acceptor. Also disclosed are polyester compositions containing such polymers as a flame retardant additive.

Polymers of benzene phosphorus oxydichloride and 4,4'-thiodiphenol

A one-step process for the emulsion polymerization of vinyl chloride using a water-soluble initiator and an aqueous emulsifier system of (1) a C.sub.12 -C.sub.18 straight chain alkyl or alkenyl phosphate surfactant and (2) a C.sub.12 -C.sub.20 straight chain alkyl or alkenyl alcohol and/or a straight chain saturated hydrocarbon having a carbon content of greater than 18 is disclosed. One suitable example of a straight chain phosphate surfactant is sodium lauryl phosphate. Suitable alcohols include stearyl alcohol, cetyl alcohol and eicosanol. A suitable hydrocarbon is eicosane. The resulting homo- and copolymer latices can be used in plastisols and organosols.

Emulsion polymerization of vinyl chloride using mixed emulsifier system

An impact-resistant and weatherable thermoplastic composition comprising from about 10 to about 50 weight percent of a crosslinked acrylate elastomer having a Tg of less than 25.degree.C., from about 5 to about 35 weight percent of a crosslinked styrene-acrylonitrile copolymer and from about 15 to about 85 weight percent of a non-crosslinked or linear styrene-acrylonitrile copolymer. The composition is made by a three-step sequence comprising emulsion polymerizing of an alkyl acrylate containing at least one crosslinking monomer, emulsion polymerizing a monomer mixture of styrene, acrylonitrile and at least one crosslinking monomer in the presence of the crosslinked acrylate elastomer formed in the previous step, or a reverse sequence of the prior two emulsion polymerization procedures, and, finally, emulsion or suspension polymerizing of styrene, acrylonitrile in the presence of the previously formed product.

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Stamford, CT, United States of America

Arthur J Yu