M&t Chemicals, Inc.

Bernard G Kushlefsky

Kenneth Treadwell

Robert V Russo

Triorganotin derivatives of polymerizable ethylenically unsaturated carboxylic acids are prepared either in the presence or absence of solvent by reacting the acid or a suitable derivative thereof with a triorganotin hydroxide or a bis(triorganotin)oxide. Polymerization of the acid or the triorganotin derivative thereof is avoided by using a dehydrating agent to remove the water formed as a by-product of the reaction.

Novel method for preparing organotin compounds

Cellular polyurethane exhibiting excellent thermal and oxidative stability can be prepared using specified methyl-, allyl-, phenyl- or benzyltin compounds as the polymerization catalyst. These catalysts are hydrolytically stable over extended periods of time, and can therefore be incorporated into precursors or masterbatches for polyurethanes that contain water as the foaming agent.

Oxidative stability of flexible polyurethane foams

This invention is a process for making a cellular polyurethane comprising reacting a polyalkylene polyol having reactive hydrogen atoms as determined by the Zerewitinoff method exhibiting a molecular weight of at least 500, an organic polyisocyanate, and water in the presence of a gel catalyst and a foaming catalyst comprising at least one compound selected from those of the formulae: ##SPC1## Wherein R is a hydrocarbon, and R' is selected from the group consisting of hydrogen, halogens, and hydrocarbons.

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Edison, NJ, United States of America

Bernard G Kushlefsky