CURING PROPERTY AND PLYWOOD ADHESIVE PERFORMANCE OF RESOL-TYPE PHENOL-UREA-FORMALDEHYDE COCONDENSED RESINS

被引：28

作者：

OHYAMA, M ^{[1
]}

TOMITA, B ^{[1
]}

HSE, CY ^{[1
]}

机构：

[1] UNIV TSUKUBA,INST AGR & FOREST ENGN,TSUKUBA,IBARAKI 305,JAPAN

来源：

HOLZFORSCHUNG | 1995年 / 49卷 / 01期

关键词：

PHENOL; UREA; FORMALDEHYDE; COCONDENSED RESINS; RESOL CURING; THERMAL PROPERTY; ADHESIVE STRENGTH; PLYWOOD;

D O I：

10.1515/hfsg.1995.49.1.87

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

The curing processes and thermal properties of resol-type phenol-urea-formaldehyde cocondensed resins, which were prepared by alkaline treatments of the cocondensed resins once synthesized from UF-concentrate and phenol, were investigated by torsional braid analysis. The resol-type cocondensed resins displayed almost the same curing behaviors and heat-resistance as a commercial resol. Their apparent activation energies determined by measuring temperature dependence of gel time were almost identical with that of resol, and quite different from that of UF resin. Their plywood adhesive performances were evaluated with a cyclic 4-hour boil test and a 72 hour boil test. The plywood test results passed the requirements for the JAS special grade structural plywood.

引用

页码：87 / 91

页数：5