ADHESIVE BONDED COMPOSITION FOR MANUFACTURE OF ADHESIVE BONDED LAYERED MATERIALS AND A METHOD OF ITS PRODUCTION FOR A NON-FILLER Russian patent published in 2005 - IPC

FIELD: woodworking industry; manufacture of adhesive-bonded composition for production of adhesive-bonded layered products.

SUBSTANCE: the invention is pertaining to the field of woodworking industry, in particular, to production of adhesive-bonded layered products and may be used predominantly in production of adhesive-bonded layered materials (veneer, plywood plates, bent-and flat production of adhesive-bonded layered workpieces). The technical task of the invention is production of adhesive-bonded layered materials with improved ecological properties at saving their physical-mechanical parameters. The task is realized in the following way. In the method of production the filler including drying and comminution there is a new thing - that is the filler made in the form of the wood flour is treated with a 12 % solution of phosphoric acid in the ratio of the mass of the adsorbent to the mass the acid as 1:3, stir the mixture during 15 minutes and dry at the temperature of 80°C within 8 hours. The adhesive-bonded composition for production of adhesive-bonded layered materials includes a carbamide-formaldehyde resin, a hardening agent and the filler - the wood flour treated with phosphoric acid and a cure retarder - an aqueous ammonia - 25 %.

EFFECT: the invention ensures production of adhesive-bonded layered materials with improved ecological properties at saving their physical-mechanical parameters.

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