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Scientia Silvae Sinicae ›› 2013, Vol. 49 ›› Issue (4): 110-116.doi: 10.11707/j.1001-7488.20130416

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Preparation and Characterization of Isocyanate Adhesive Based on Soybean Oil for Wood Bonding

Zhang Yadong1, Gu Jiyou1, Zheng Zhifeng2, Huang Yuanbo2   

  1. 1. College of Material Science and Technology, Northeast Forestry University Harbin 150040;2. College of Materials Engineering, Southwest Forestry University Kunming 650224
  • Received:2012-02-24 Revised:2012-07-13 Online:2013-04-25 Published:2013-04-25

Abstract: One-component isocyanate adhesive with moisture curing at room temperature has been prepared from polyols derived from soybean oil which is in order to substitute for traditional polyether polyols, their structures and thermal stability were assessed by FTIR, TG and DTG. It studied the effect of hydroxyl value, dosage and NCO/OH molar ratio on the pot life, bonding strength and thermo stability of adhesive. It indicated that, under the condition that the 69 mgKOH ·g-1 hydroxyl value of soybean oil-based polyol, the 20%SOP/PEG molar ratio, the 7 R value and the 80% solid content, the final CPS of isocyanate adhesive was 21.06 MPa, pot life was more than three months, Wet circulation strength was 12.04 MPa which was higher 26.01% than that of PEG/PAPI system, and the adhesive had a higher thermal stability.

Key words: soybean oil-based polyol, isocyanate adhesive, wood bonding, thermal stability, water resistance

CLC Number: