Study on Preparation of Starch-based Polyisocyanate Adhesives Using Composite-modified Starch
Wang Shu-min · Linchan huaxue yu gongye · 2008
Preparations of Ⅰ,Ⅱ types starch-based aqueous polyisocyanate(API) adhesives using composite-modified corn starch are systemically studied.Using dosages of composite-modified starch emulsion,oxalic acid,polyvinyl alcohol(PVA),and polymeric MDI(PMDI) as main influencing factors,compressive,tensile and shearing strengths as evaluation target,formulation ofⅠtype starch-based API which meets index requirement of JISK 6806-1995 is optimized by orthogonal test and factors affecting physical and chemical properties of adhesive are analyzed systemically.Testified by validating test,the best optimized formulation has obvious operability of production.Cross-linking agent PMDI can be directly used without sealing,which meets completely the requirement for manufacture process of glued wood products.