Abstract: 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(a) from about 25 to about 75 parts by weight of lead naphthenate; and(b) from about 75 to about 25 parts by weight of at least one dialkyltin dicarboxylate compound of the formula: ##STR1## wherein R is selected from C.sub.1 to C.sub.8 alkyl and R' is selected from C.sub.1 to C.sub.18 alkyl, based upon 100 parts by weight of said catalyst composition.The catalyst compositions promote sufficiently rapid cure rates such that injection moldable poly aliphaticisocyanate-based polyurethane compositions may be provided. In a preferred embodiment, new and improved integral skin foam polyurethane compositions are disclosed which may be reaction injection molded to form integral skin foam shaped articles exhibiting ultraviolet light resistance and improved colorability.

Abstract: 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.

Abstract: 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(a) from about 25 to about 75 parts by weight of lead naphthenate; and(b) from about 75 to about 25 parts by weight of at least one dialkyltin dicarboxylate compound of the formula: ##STR1## wherein R is selected from C.sub.1 to C.sub.8 alkyl and R' is selected from C.sub.1 to C.sub.18 alkyl, based upon 100 parts by weight of said catalyst composition.The catalyst compositions promote sufficiently rapid cure rates such that injection moldable poly aliphatic-isocyanate-based polyurethane compositions may be provided. In a preferred embodiment, new and improved integral skin foam polyurethane compositions are disclosed which may be reaction injection molded to form integral skin foam shaped articles exhibiting ultraviolet light resistance and improved colorability.

Abstract: 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.

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