Dow Corning Corporation

Other

Kevin Edward Lupton

David Joseph Romenesko

Hongxi Zhang

Randall Gene Schmidt

Wei Chen

Yoshitsugu Morita

Haruhiko Furukawa

Gerald A Gornowicz

Dale E Hauenstein

Arnold W Lomas

Leon Neal Cook

Kim Struble

Richard Allen Hessick, Jr

Thermoplastic elastomer composition, method of preparation, and molded products thereof

The present invention relates to a method for processing a thermoplastic resin composition by extruding the composition through a nickel die to provide an extrudate having a low degree of surface roughness, said composition comprising

Method for extruding thermoplastic resins

There is disclosed a method for preparing a thermoplastic elastomer, said method comprising:

Thermoplastic silicone elastomers

An additive to improve the hydrophobicity of a thermoplastic resin wherein the additive is at least 0.3 parts by weight of a thermoplastic silicone blend, said thermoplastic silicone blend having: (A) an organosilicone resin of the empirical formula

Organic polymers modified with thermoplastic silicone blends

A method of dispersing silicone compositions in organic thermoplastic materials is disclosed. The novel compositions produced by the method of the invention have a fine and relatively uniform dispersion or organosilicone in an organic thermoplastic. An organosilicone resin (A) and a predominantly linear silicone fluid (B) are first blended to substantial homogeneity to form an organosilicone alloy therefrom. The organosilicone alloy exhibits thermoplastic behavior and has a temperature-dependent complex viscosity .eta.*.sub.Si (T) associated therewith. Likewise the organic thermoplastic materials have a temperature-dependent complex viscosity, .eta.*.sub.OTP (T), associated therewith. The organic thermoplastic and the organosilicone alloy are thereafter mixed at a predetermined mixing temperature, T.sub.m, and a predetermined shear strain rate. The organic thermoplastic material and the organosilicone alloy are both in a flowable state at T.sub.m. The value of T.sub.m is selected to be about .+-.30.degree. C. of a temperature, T.sub.0, wherein the absolute value of {72*.sub.OTP (T.sub.0)-.eta.*.sub.Si (T.sub.0)} is at its lowest value, at the predetermined shear strain rate.

Method of dispersing silicone compositions in organic thermoplastic

Solventless, thermoplastic silicone pellets are prepared blending silicone resins (A) of the MQ-type and with predominantly linear silicone fluids (B), such as polydimethylsiloxane liquids and gums, to substantially homogeneity. The blends are heated to a predetermined compression-forming temperature, compression-formed to a densified mass and shaped into a pellet form. The composition of the pellets is balanced such that the pellets exhibit plastic flow at the predetermined compression-forming temperature and resist agglomeration at temperatures at or below a predetermined maximum storage temperature.

Method of preparing solventless, thermoplastic silicone pellets and the

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Midland, MI, United States of America

Kevin Edward Lupton