PHENOL-MELAMINE-UREA-FORMALDEHYDE COPOLYMER RESIN COMPOSITIONS, METHOD OF MAKING AND CURING CATALYSTS THEREFOR

摘要

27Disclosed herein is a thermosetting resinous adhesivecomposition comprising: (a) a thermosetting resin composition comprisingphenol, melamine, formaldehyde, and urea, said composition comprising at least25 weight percent of melamine and at least 10 weight percent of phenol; (b) acuring catalyst; (c) water added in an amount sufficient to impart a suitableviscosity. Also disclosed is a stable copolymer resin precursor composition for useas a precursor to the the thermosetting adhesive. Further disclosed are methods ofpreparing the adhesive composition and precursor. further disclosed areengineered wood products made in accordance with the present invention.