Water Based Polymer-Isocyanate Adhesive For Wood

Abstract

Authors invented new adhesive for wood, the conception is based on very unique two parts cross-linking system. The aim of this R & D is to obtain exellent water resistant adhesives by adding reactive isocyanate compound as a cross-linking agent to the primary components comprised of water-based polymer and synthetic resin latex or thermosetting resin emulsion.
The primary components may contain some fillers an d other ingredients. Polyfunctional isocyanate as shwon in Fig.1 is used for cross-linking component. It is a system that advanced water resistance by combining main fluid and cross-linker to develop three dimensional cross-link.
This adhesives made it possible to offer the performance which corresponds to each purpose by modifying components of main fluid, or changing types of emulsion as SBR, Acryl, EVA, etc. It is also possible to control its performance by changing the type of cross-linker or adjusting its quantity. (refer to Fig.4) This adhesive is mainly used for laminated wood, and its easy handling and high adhesion strength make it more convenient to utilize wood resources effectively, and therefore used as a main adhesives for laminated wood.