Patent ID: 9314947
Filing Date: 2016-04-19
CPC Classification: B29C,B29K,C08G,C08L,C09J

Claim Text:
1. A process for the production of lignocellulosic composites comprising the following steps: (a) providing a lignocellulosic substrate comprising a plurality of lignocellulosic adherends, wherein the lignocellulosic substrate moisture content is greater than 6% by weight; (b) spraying a first stream of an adhesive onto the lignocellulosic substrate wherein the first stream comprises a polyfunctional isocyanate and a transition metal organometallic catalyst; wherein the first stream is free of a prepolymer; (c) spraying a second stream of the adhesive onto the lignocellulosic substrate wherein the second stream, which is different from the first stream, comprises a hydrophilic organic polyahl having oxyethylene segments that make up greater than 50% of the weight of the polyahl and a non-isocyanate reactive additive; wherein the second stream is free of a prepolymer; then (d) forming and pressing the lignocellulosic substrate under conditions suitable for curing the adhesive to produce a bonded lignocellulosic composite article; (e) recovering the bonded lignocellulosic composite article; and wherein the conditions suitable for curing include heating the lignocellulosic substrate to a temperature of from 300° F.-400° F.