American Cyanamid Company

Cytec Technology Corporation

Vazken A Alexanian

Laurence W Chang

Peter S Forgione

Robert G Lees

Laurence John Nummy

Denise Elizabeth Fiori

Novel bicyclic alkyl dicarbamates are prepared from norbornadiene and other simple starting materials, and these are subsequently thermally cracked to novel diisocyanate norbornyl derivatives, which are, among others, useful for crosslinking active hydrogen compounds.

Preparation of a novel diisocyanate from norbornadiene

Substantially alternating, organic solvent soluble copolymers of 2000 to 4000 molecular weight useful as crosslinking agents and containing monomeric units derived from monomers comprising (i) 40 to 50 mole percent of an isopropenyl-.alpha.,.alpha.-dimethylbenzyl isocyanate, and (ii) 60 to 45 mole percent of an unsaturated ester are described together with processes for their preparation. Curable compositions containing the copolymer and an isocyanate reactive material are also described.

Room temperature curing, alternating

A process for the production of tertiary benzyl isocyanates by reaction of the corresponding olefin with a carbamoyl halide to form the benzyl halide followed by the reaction of the benzyl halide with an excess of isocyanic acid to form the isocyanate and carbamoyl halide which can be recovered and recycled.

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Darien, CT, United States of America

Vazken A Alexanian