American Cyanamid Company

Ajaib Singh

Samuel Kaizerman

Joseph Lawrence Schmitt, Jr

A storage stable polyester based polyurethane composition is provided which contains from about 0.05 to 0.75 percent by weight of an organic epoxide compound which has a molecular weight of not less than 60.

Stabilization of polyester urethanes using organic epoxides

An improved process for preparing polyformals is provided which comprises condensing an aliphatic diol, in which the hydroxyl groups are separated by at least four carbon atoms, with an essentially stoichiometric amount of formaldehyde in the presence of a Bronsted acid catalyst and contacting the condensation product with an organic epoxide in an amount sufficient to react with the residue of said catalyst.

Process for preparing polyformals in the presence of an organic epoxide

The preparation of polythioethers by the polycondensation of thiodiethanol in the presence of a heterogeneous mixed metal oxide catalyst.

Method for the preparation of polythioethers from thiodiethanol using

Preparation of polythioethers by the polycondensation of thiodiethanol in the presence of an acid-acting carbon.

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Somerville, NJ, United States of America

Ajaib Singh