Basf Corporation

Li-Mei Lu

Donald Charles Mente

Joe C Wilson

David D Peters

Anthony G Schaefer

A method is disclosed for preparing compression molded or pressed lignocellulosic articles. The method involves forming a binder resin by combining a polyisocyanate component with a synergist component of a C to C N-alkyl pyrrolidone, gamma-butyrolactone, or mixtures thereof. A resinated lignocellulosic mixture is formed by combining the binder resin with lignocellulosic particles having a moisture content of from 2 to 15 weight percent. The compression molded or pressed lignocellulosic article is formed by compressing the resinated lignocellulosic mixture.

Process of making lignocellulosic articles

A method for preparing compression molded or pressed lignocellulosic articles is disclosed. The method involves forming a binder resin by combining a polyisocyanate component with a parting agent and preferably a synergist. The parting agent is the reaction product of an isocyanate compound and an isocyanate-reactive compound of the general structure R&mdash;(ao) &mdash;Y where: R is a hydrophobic group containing alkyl, alkaryl, polyaryl, or siloxane moieties; (ao) is an alkylene oxide or mixture of alkylene oxides; n is from 1 to 25; and Y represents a monofunctional isocyanate-reactive group. A resinated lignocellulosic mixture is formed by combining the binder resin with lignocellulosic particles. Then a compression molded or pressed lignocellulosic article is formed by compressing the resinated lignocellulosic mixture at an elevated temperature and under pressure. It is particularly preferred that the binder resin further include a synergist of either a C N-alkylpyrrolidone, gamma-butyrolactone, or a mixtures of them. The most preferred synergist is N-methyl-2-pyrrolidine.

Binder resin and synergist composition including a parting agent and process of making lignocellulosic

Adhesive binder and synergist composition and process of making lignocellulosic articles

Parting agent for an isocyanate wood binder

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Canton, MI, United States of America

Li-Mei Lu