Mobay Chemical Corporation

Mobay Corporation

Bayer Aktiengesellschaft

Russell P Carter, Jr

Sivaram Krishnan

Ulrich R Grigo

Hans-Jurgen Kress

Dieter Neuray

Wolfgang Alewelt

Klaus Kircher

Terry A Potter

Richard S Pantone

Mark W Witman

Robert P Yeater

James Y Chung

Gerard E Reinert

Herbert L Heiss

In C Lim

Robert D Kroshefsky

The present invention is directed to the stabilization of a prepolymer based on methylene diphenyl isocyanate rich in the 2,4'-isomer. It was surprisingly found that the color stability, viscosity and aging characteristics of the prepolymer are improved markedly upon the incorporation therewith of a combination of a certain epoxide compound and a hindered phenol.

Color stable urethane prepolymer

The present invention is related to polycarbonate molding compositions containing a co-precipitate of a polycarbonate resin and a fluoropolymer. This co-precipitate was found to be suitable as an additive for polycarbonate resins because it offers improved dispersibility with the resin and good flammability performance as well as aesthetic characteristics. The co-precipitate is prepared by first mixing an aqueous dispersion of a fluoropolymer with a polycarbonate solution and then precipitating both using a suitable precipitation agent. After isolation washing and drying the co-precipitate of the invention is suitable for incorporation in a polycarbonate resin optionally with known flame retarding agents. Molded parts prepared from the compositions of the invention are characterized by their improved homogeneity and flame retardance.

Flame retardant polycarbonate compositions

A thermoplastic blend comprising a C.sub.1 -C.sub.4 (alkylene terephthalate), a polycarbonate resin and a butadiene or an acrylate based graft copolymer was found to be amenable without pre-extrusion drying, to thermoplastic processing upon the admixing therewith an additive amount of a polymeric modifier.

Thermoplastic resinous blend and a method for its preparation

Polycarbonate compositions comprising an aromatic polycarbonate resin wherein dispersed are powdered sulfates, are particularly suitable for the preparation of films characterized by their low coefficient of static friction, high light transmission and virtual freedom from haze.

Polycarbonate compositions containing powdered sulfates

Polycarbonate compositions comprising an aromatic polycarbonate resin, wherein dispersed are silicate particulates, are particularly suitable for the preparation of films having a low coefficient of static friction, high light transmission and virtual freedom from haze.

Polycarbonate-silicate compositions

The present invention is directed to a polycarbonate composition comprising finely divided silica which composition is characterized by low gloss.

Polycarbonate compositions having low gloss values

Polycarbonate compositions comprising an aromatic polycarbonate resin wherein dispersed are calcite particulates, are particularly suitable for the preparation of films characterized by their low coefficient of static friction, high light transmission and virtual freedom from haze.

Polycarbonate-calcite compositions

Polycarbonate compositions comprising an aromatic polycarbonate resin, wherein dispersed are starch particulates, are particularly suitable for the preparation of films having a low coefficient of static friction, high light transmission and are virtually free of haze.

Polycarbonate-starch compositions

A sufficient amount of a novel halogenated aromatic imide sulfonate, represented by the structural formula: ##STR1## wherein X is a halogen, n is 1 to 4, Y is a lower alkyl having 1 to 4 carbon atoms, a halogen or a hydrogen atom, 'a' is 0 to 4, M is an alkali metal and T is either 0 or 1, is incorporated into an aromatic polycarbonate to provide flame resistance thereto.

Flame retarding agents for polycarbonates

The instant invention is directed to novel thermoplastic polyurethane materials containing a processing aid. More particularly, the instant invention is directed to a thermoplastic polyurethane composition comprising: (A) from 40 to 100 percent by weight of a thermoplastic polyurethane, (B) from 0 to 60 percent by weight of a thermoplastic polymer selected from the group consisting of thermoplastic polycarbonates, thermoplastic polyoxymethylenes, thermoplastic acrylonitrile/butadiene/styrene graft copolymers, thermoplastic polybutylene terephthalates, thermoplastic polyethylene terephthalates, and mixtures thereof and (C) from 0.5 to 10 percent by weight based on the amount of (A) and (B), of a processing aid which is an acrylic polymer having a number average molecular weight of from 500,000 to 1,500,000. The acrylic polymers are preferably selected from the group consisting of homopolymers of methyl methacrylate and n-butyl methacrylate, copolymers of methyl methacrylate and ethyl acrylate and terpolymers of methyl methacrylate, n-butyl acrylate and styrene, said homopolymers, copolymers and terpolymers having number average molecular weights of from 500,000 to 1,500,000.

Thermoplastic polyurethane blends containing a processing aid

The instant invention is directed to novel color and hydrolytically stable thermoplastic polyester urethanes. The invention broadly consists of adding 2-oxazolidones to the components of the polyurethane, or to the polyurethane itself.

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New Martinsville, WV, United States of America

Russell P Carter, Jr