Pabu Services, Inc.

Robert W Chapman

Frederick J Vyverberg

Harry A Hodgen

Leonard J Chyall

Phillip K Chou

An intumescent polymer composition includes a matrix polymer, an acid catalyst source, a nitrogen source and an ionic phyllosilicate synergist having substantial cationic exchange capacity. Particularly preferred ionic phyllosilicates are montmorillonoids whereas pentaerythritol phosphate is a preferred acid catalyst source:

Intumescent polymer compositions

A process for the production of pentaerythritol phosphate alcohol (PEPA) comprising reacting in the liquid phase phosphorus oxychloride (POCl ) with pentaerythritol (PE) at a reaction temperature of at least about 100&deg; C. in the presence of a solvent which is an alkane substituted with at least one halogen atom and having an atmospheric boiling point of about 40 to about 150&deg; C., e.g., 1,2-dichloroethane (ethylene dichloride). The reaction pressure is sufficiently high to maintain the solvent in the liquid phase.

Growing community of inventors

Delphi, IN, United States of America

Robert W Chapman