Patent ID: 8293821
Filing Date: 2012-10-23
Classification: C08L,C09J

Abstract:
1. A method of manufacturing a composite wood adhesive comprising: providing an amylaceous material consisting essentially of starch or flour that is uncooked comprising less than about 25% moisture; providing about 5-60% of a high fiber by-product; mixing the amylaceous material and the high fiber by-product; co-extruding the high fiber by-product with the amylaceous material at a temperature of about 150 F to about 400 F, at a die pressure of about 50 PSI to about 2000 PSI, and at a rate of about 100 RPM to about 600 RPM, such that the amylaceous material comprises about 25-35% of fully or partially pre-gelatinized starch or flour and about 65-75% of substantially uncooked starch or flour to form a secondary extender; providing about 60-80% of at least one resin, about 3-10% of a primary extender comprising walnut shell, pecan shell, alder bark, coconut shell or the fibrous dry substance remaining after furfural production, about 12-18% added water and about 1-5% of at least one caustic; and mixing the secondary extender, the at least one resin, the primary extender, the water and the at least one caustic to form the composite wood adhesive.