The Preparation of Solvent-Free Polyurethane Laminating Adhesive with Mixed-Polyols

Abstract:

A two-component polyurethane adhesive based on solvent-free was prepared with PBA, vegetable oil polyols, IPDI and several different small molecular polyols as main raw materials. The influences of different mole ratios of NCO groups (from prepolymer )and OH groups (from the mixed polyols) on water absorbing capacity and T-style peeling strength were studied, as well as the effects of small molecular polyols on curing speed, heat resistance, water absorbing capacity and T-style peeling strength. The results showed that PU adhesive performed the best when mole ratio of NCO/OH was 1.3 in this experiment. And small molecular polyols added to the adhesives can not increase the curing speed and the ability of heat resistance. However, it could significantly improve the adhesion strength of PU adhesive, and adding appropriate amount of small molecular polyols selectively could improve its water resistance.

• Periodical: Advanced Materials Research (Volume 549)
• Pages: 177-182
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.549.177
• Online since: July 2012
• Authors: Shuang Lian Chen, Guang Xue Chen, Qi Feng Chen, Chun Jiang Jia, Qin Wang
• Keywords: Laminating Adhesive, Polyurethane (PU), Small Molecular Polyols, Solvent-Free, Vegetable Oil Polyol

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