Laminating wood adhesives by generation of resorcinol from tannin extracts

摘要

AbstractResorcinol has been generatedin situby high levels of sulfitation of the tannin extract of the black wattle tree (Acacia mearnsii, formelymollissima). Consequently, weather and boil‐proof tannin‐based cold‐setting adhesives for wood, satisfying the requirements of international standards, have been prepared and optimized by halving the amount of resorcinol chemical added to the tannin. Sulfitation afforded also considerable improvement of the “drying out” time characteristics of these