Protein-modified isocyanate-functional adhesive binder for cellulosic composite materials
AssigneeGeorgia-Pacific Resins, Inc.
InventorsJennifer Cowan, Derek Atkinson, Robert Breyer, Jason Rivers, Charles Vest
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Abstract
An adhesive binder composition containing an isocyanate-functional resin modified with a protein, preferably with a source of soy protein, and the use of the binder for preparing wood composites, especially OSB.
Claims17
A wood composite bonded with an adhesive binder composition comprising an isocyanate-functional resin modified with a soy protein selected from the group consisting of soy flour, soy protein modified with saturated and unsaturated alkali metal C8-C22 sulfate and sulfonate salts, soy protein modified with compounds having the formula R2NC(═X)NR2, wherein each R is individually selected from the group consisting of H and C1-C4 saturated and unsaturated groups, and X is selected from the group consisting of O, NH, and S, and blends thereof, said protein provided in an amount of about 0.5 to about 80 percent by weight of binder solids.
The wood composite of claim I wherein the isocyanate-functional resin is synthesized with an excess of isocyanate.
A process for making a wood composite comprising applying an adhesive binder composition to a wood material, the adhesive binder composition comprising an isocyanate-functional resin modified with a soy protein selected from the group consisting of soy flour, soy protein modified with saturated and unsaturated alkali metal C8-C22 sulfate and sulfonate salts, soy protein modified with compounds having the formula R2NC(═X)NR2, wherein each R is individually selected from the group consisting of H and C1-C4 saturated and unsaturated groups, and X is selected from the group consisting of O, NH, and S, and blends thereof, said protein provided in an amount of about 0.5 to about 80 percent by weight of binder solids, consolidating said wood material, and curing said isocyanate-functional resin.
An adhesive binder comprising an isocyanate-functional resin modified with a soy protein selected from the group consisting of soy flour, soy protein modified with saturated and unsaturated alkali metal C8-C22 sulfate and sulfonate salts, soy protein modified with compounds having the formula R2NC(═X)NR2, wherein each R is individually selected from the group consisting of H and C1-C4 saturated and unsaturated groups, and X is selected from the group consisting of O, NH, and S, and blends thereof, said protein provided in an amount sufficient to form an adhesive binder having greater strength than the isocyanate-functional resin.
Dependencies are inferred from the claim text.