Rhone-poulenc, Inc.

Caschem, Inc.

Carlos M Ramirez

Peter S Gradeff

Douglas A Usifer

Kenan Yunlu

Heiko Mauermann

The invention relates to polyurethane compositions that can be formulated as a two component systems of a first component of a polyol and an amine of formula (I): ##STR1## and a second component of isocyanate. This invention further relates to methods of formulating those polyurethanes, and to use of those polyurethanes in separatory devices.

Polyurethane compositions

Alkoxy-type derivative compounds are a process for preparing alkoxy-type derivatives of trivalent Group 3b metals, e.g., cerium (III), such as alkoxides, siloxides or alkanolatoamines from an anhydrous complex of trivalent Group 3b metals, e.g. cerium ammonium nitrate complex, in the presence of an alcohol, silanol or alkanolamine and a base or by employing the complex and alkali salts of the alcohol, silanol, or alkanolamine.

Alkoxy-type derivative compounds and process for preparing alkoxy-type

A process is provided for preparing colloidal dispersions of alcohol-dispersible association complexes of ceric dioxide and a hydroxyphenyl carboxylic acid having from about seven to about twenty carbon atoms in a molar ratio CeO.sub.2 /acid of at least about 6:1 which comprises:

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Piscataway, NJ, United States of America

Carlos M Ramirez