Welcome to Chemistry and Industry of Forest Products,

›› 2008, Vol. 28 ›› Issue (5): 77-83.

• 研究报告 • Previous Articles     Next Articles

Study on Preparation of Starch-based Polyisocyanate Adhesives Using Composite-modified Starch

SHI Jun-you1,2,3, GU Ji-you3, TU Huai-gang2, WANG Shu-min2   

  1. 1. Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;2. Department of Wood Science and Engineering, Beihua University, Jilin 132013, China;3. College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
  • Received:2007-09-04 Revised:1900-01-01 Online:2008-10-30 Published:2008-10-30

Abstract: 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.

Key words: corn starch, composite modification, isocyanate adhesive, adhesive

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