METHOD FOR PRODUCING ADHESIVE FOR WOODWORKING

• Main Authors: KOTE KAZUHIRO, YAMAMOTO HIROKI, YOSHIKAWA HIROAKI, YAMAZAKI KAZUAKI, HIGURE MASAMI, TAKESHITA HIROKO, NAGASAWA SHIGERU
• Format: Patent
• Language: English
• Published: 23.06.2005
• Edition: 7
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES

PROBLEM TO BE SOLVED: To provide a method for producing an adhesive for woodworking, excellent in film-forming property, workability and adhering strength without adding a plasticizer and used for adhering wood to wood. SOLUTION: In the method for producing the adhesive for woodworking and for adhering wood to wood, the adhesive comprises vinyl acetate emulsion containing no plasticizer. The method comprises a step for polymerization while adding ethylene, vinyl acetate and a catalyst to a reaction system comprising polyvinyl alcohol (PVA) and vinyl acetate so as to obtain an ethylene-vinyl acetate copolymer resin (EVA) emulsion of 0.6-1.8 μm average particle diameter and of 15-35 wt.% ethylene content, and a step for seed polymerization while adding a catalyst and vinyl acetate to a reaction system comprising the emulsion and PVA so as to obtain a vinyl acetate resin-based emulsion containing no plasticizer and having 15-40 wt.% EVA content based on the sum of vinyl acetate resin, EVA and PVA. COPYRIGHT: (C)2005,JPO&NCIPI