American Cyanamid Company

Ignazio S Megna

Richard B Toothill

Ajit K Chaudhuri

Curtis A Franz

A catalyst composition for improving the reaction-cure rate of polyurethane compositions derived from poly aliphatic isocyanate compounds and poly-hydroxyl bearing compounds is disclosed. The catalyst composition consists essentially of

Catalyst compositions for polyaliphatic isocyanate-based polyurethanes

A prepolymer curable with a hydroxyl or amine functional curative to form a polyurethane elastomer composition having low heat buildup characteristics is disclosed. Specifically, the polyurethane prepolymer has terminally reactive isocyanate groups and is prepared by reaction of polymeric diol with a stoichiometric excess of a mixture of the 2,6- and 2,4-isomers of tolylene diisocyanate, said mixture containing from about 50 to about 90 wt % of the 2,6-isomer. The invention also relates to a polyurethane elastomer composition comprising the aforementioned prepolymer and a curingly effective amount of a curative selected from the group consisting of aromatic diamines, hydroxy functional compounds, and mixtures thereof, and optionally, from about 0.01 to 1 part of catalyst per hundred parts of prepolymer. Also disclosed are articles of manufacture produced from the above composition, as well as compositions wherein the mixture contains 40 to 100 wt % of the 2,6-isomer.

Low heat buildup polyurethane compositions and articles

The malodor in polymers based on thiodiethanol and elastomers produced therefrom is reduced by the incorporation of various metal salts of Group IB, IIB or VIII of the Periodic Table therein.

Elastomers derived from thiodiethanol having reduced odor

Blends of thermoplastic polyurethane elastomers and neutralized ethylene/carboxylic acid copolymers which are useful for blow-molding applications, are disclosed.

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Lebanon, NJ, United States of America

Ignazio S Megna