PREPARATION OF LIGNOCELLULOSIC ISOCYANATE MOLDED COMPOSITIONS USING A COPOLYMER OF A FUNCTIONAL POLYSILOXANE AND A CARBOXYLIC ACID OR SALT THEREOF AS RELEASE AGENT

摘要

In the compression molding of lignocellulosic composite articles, such as particle or flake baord, in which polyisocyanate binder systems are employed, a copolymeric reaction product of a hydroxy - or carboxy - containing polysiloxane and a monocarboxylic acid or metal salt thereof is provided as release agent on the mold surfaces to give multiple release. Optionally organopoly-siloxane fluid may be employed along with the copolymer as a diluent.