The Dow Chemical Company

David V Dellar

Edmund P Woo

Dwight K Hoffman

William J Kruper

Herman W Schlameus

Thuan P Dixit

An active material encapsulated in a coating material immiscible therewith is contacted with a solvent that dissolves residual active material on the surface of the coating material without dissolving the coating material. The resultant encapsulated material has improved stability as compared to the material not contacted with solvent.

Encapsulated active materials and method for preparing same

Compositions comprising thermoplastic polymers having added thereto small amounts of a hydroxymethyl-substituted carboxylic acid are usefully employed to remove accumulated polymeric residues from polymer processing equipment.

Composition and method for purging polymeric residues

This invention is a composition comprising

Novel porphyrinate and amine composition useful as catalysts in the

This invention is a process for the preparation of polytriazines comprising contacting aromatic polycyanates in the presence of a catalytic amount of a cobalt salt of a C.sub.6-20 carboxylic acid at a temperature between about 20.degree. C. and about 200.degree. C.

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Sanford, MI, United States of America

David V Dellar