Adhesives, Reaction Systems, and Processes for Production of Lignocellulosic Composites

摘要

Adhesives, reaction systems, and processes for the production of lignocellulosic composites. The reaction system comprises a multi-component adhesive and a lignocellulosic substrate. The lignocelluosic substrate comprises a plurality of lignocellulosic adherends and is preferably a mass of wood particles. The multi-component adhesive comprises a multi-functional isocyanate, a hydrophilic polyahl, and an organotransition metal catalyst. The multi-component adhesive is characterized by being formulated into at least two mutually reactive chemical component streams. The process comprises the separate application of the mutually reactive chemical component streams of the multi-component adhesive to the lignocellulosic substrate, followed by forming and pressing the adhesive treated substrate under conditions appropriate for curing the adhesive and forming a lignocellulosic composite article. The adhesives, reaction systems, and processes are particularly well suited for the production of oriented strand board (OSB).

主权项

1. An adhesive treated lignocellulosic mixture comprising: a plurality of lignocellulosic substrates coated with an adhesive wherein the adhesive comprises: a polyfunctional isocyanate, a transition metal organometallic catalyst, 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.