Georgia-pacific Resins, Inc.

Frederick C Dupre

Kurt D Gabrielson

Richard Arthur Rediger

Kelly A Shoemake

James T Wright

Kim K Tutin

Ted M McVay

Benjamin D Gapud

Millard E Foucht

W Hayes Ingram

William P Freese

Mahfooz Ahmad

Frank Bock

The preparation of phenol-formaldehyde and melamine formaldehyde resin-based binders extended with a cyclic urea-formaldehyde prepolymer and to products prepared using the binders. More particularly, the invention relates to a cyclic urea prepolymer comprising urea, formaldehyde, and ammonia or a primary amine which, when added to a phenol-formaldehyde or melamine-formaldehyde based resin, results in a useful binder for the manufacturer numerous articles.

Cyclic urea-formaldehyde prepolymer for use in phenol-formaldehyde and melamine-formaldehyde resin-based binders

A plywood-patching composition is provided based on a noncellular polyurethane elastomer prepared by reacting a polyether or polyester polyol with a polyisocyanate in the presence of a catalytic amount of a substantially anhydrous potassium salt of a carboxylic acid having from 2 to about 20 carbon atoms, and process for preparing same. The catalysts utilized are relatively non-toxic, yet they promote rapid polymerization with essentially no foaming for a wide variety of non-cellular polyurethane elastomeric applications, particularly in plywood-patch applications where even small amounts of foaming is deleterious to the properties thereof.

Potassium catalyst system for preparing polyurethane based plywood-patch

Growing community of inventors

Altanta, GA, United States of America

Frederick C Dupre