Patent ID: 6294117
Filing Date: 2001-09-25
Classification: C08G,C08L

Abstract:
A process for the production of wood composite materials comprising:A) combining wood particles with 1 to 25% by weight, based on the total weight of the wood composite, of a binder composition consisting essentially of:(1) a polymethylene poly(phenylisocyanate) having a functionality of about 2.1 to about 3.5, and NCO group content of from about 25 to 33%, and a monomer content of from about 30% to 90% by weight, wherein the content of the monomer comprises up to about 5% by weight of the 2,2'-isomer, from about 1% up to about 20% by weight of the 2,4'-isomer, and from about 25% to about 65% by weight of the 4,4'-isomer, based on the entire weight of the polyisocyanate; and(2) a solid novolac resin, wherein the weight ratio of component A)(2) to component A)(1) is from 2:1 to 10:1;andB) molding or compressing the combination formed in A), thus forming the wood composite material.