초록 ▼

This invention relates to a process for the production of wood composite materials. This process comprises combining wood particles with a mixture comprising a solid compound comprising urea and/or melamine, and a polymethylene poly(phenyl isocyanate), followed by molding or compressing the coated c

This invention relates to a process for the production of wood composite materials. This process comprises combining wood particles with a mixture comprising a solid compound comprising urea and/or melamine, and a polymethylene poly(phenyl isocyanate), followed by molding or compressing the coated combination of wood particles.

대표청구항 ▼

[ What is claimed is:] [1.]1. A process for the production of wood composite materials comprising combining wood particles with 1 to 25% by weight, based on the total weight of the wood composite, of a mixture comprising:(1) a solid, dry compound selected from the group consisting of urea, melamine,

[ What is claimed is:] [1.]1. A process for the production of wood composite materials comprising combining wood particles with 1 to 25% by weight, based on the total weight of the wood composite, of a mixture comprising:(1) a solid, dry compound selected from the group consisting of urea, melamine, and mixtures thereof, and(2) a polymethylene poly(phenyl isocyanate) having a functionality of about 2.1 to about 3.5, an NCO group content of from about 30 to 33%, and a monomer content of from about 30 to about 90% by weight, wherein the content of the monomer comprise up to about 5% by weight of the 2,2'-isomer, from about 1 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;wherein the weight ratio of component a)(1) to component a)(2) is from 10:1 to 2:1, and molding or compressing the coated combination formed in a).