The Dow Chemical Company

James A Vanderhider

Richard D Peffley

Gerald M Lancaster

Robert B Turner

Robert Carswell

Louis W Meyer

John H Spells

Internal mold release compositions for use in preparing molded polymeric products are disclosed which contain (a) a primary or secondary amine (b) a carboxylic acid or amido carboxylic acid salt of a group II metal or of aluminum, lithium, copper, iron, cobalt or nickel, and optionally (c) a carboxylic acid or amido carboxylic acid.

Internal mold release compositions

This invention is a process for preparing polyurethane and/or polyurea elastomer comprising reacting a liquid, preformed isocyanate-terminated prepolymer, which prepolymer is the reaction product of a stoichiometric excess of a polyisocyanate and a relatively high equivalent weight isocyanate-reactive compound, with a chain extender mixture, which chain extender mixture comprises

Polyurethane elastomers prepared in a two-step process using mixtures of

Reaction injection molded polyurethanes prepared from a composition comprising (A) a relatively high molecular weight polyol, (B) a chain extender and (C) an aliphatic polyisocyanate or polyisothiocyanate are improved by replacing a portion of the relatively high molecular weight polyol with an aminated or partially aminated polyoxyalkylene material.

Reaction injection molded polyureas employing high molecular weight

Reaction injection molded polyurethanes prepared from a composition comprising (A) a relatively high molecular weight polyol, (B) a chain extender and (C) a polyisocyanate or polyisothiocyanate are improved by replacing a portion of the relatively high molecular weight polyol with an aminated or partially aminated polyoxyalkylene material.

Reaction injection molded polyurethanes employing high molecular weight

A composition consisting essentially of (I) at least one polyol having an average of more than 2 hydroxyl groups per molecule and an average hydroxyl equivalent weight of at least about 500 and (II) as a chain extender composition (A) an aliphatic amine-containing material having at least one primary aliphatic amine group per molecule and (B) at least one material selected from (1) hydroxyl-containing materials, or (2) aromatic amine-containing materials. These compounds are useful in preparing polyurethane articles employing reaction injection molding technology.

Compositions containing polyether polyols and aliphatic primary amines

Reaction injection molded polyurethanes are prepared employing a mixture of chain extenders, at least one of which is a hydroxyl-containing compound free of aliphatic amine hydrogen atoms such as, for example, ethylene glycol, or an aromatic amine hydrogen-containing compound which is free of aliphatic amine and at least one of which is an aliphatic amine-containing compound which contains at least one primary amine group such as an aminated polyoxypropylene glycol.

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Lake Jackson, TX, United States of America

James A Vanderhider