Patent ID: 6214265
Filing Date: 2001-04-10
Classification: B27N,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 said polymethylene poly(phenylisocyanate); and(2) a solid resole resin,wherein the weight ratio of component A)(2) to component A)(1) is from 1:3 to 10:1; andB) molding or compressing the combination formed in A), thus forming the wood composite material.