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Title: Curing property and plywood adhesive performance of resol-type phenol-urea-formaldehyde cocondensed resins

Author: Ohyama, Masahiko; Tomita, Bunichiro; Hse, Chung-Yun;

Date: 1995

Source: Holzforschung, Vol. 49: 87-91

Publication Series: Miscellaneous Publication

Description: 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 enegies determined by measuring temperature dependence of gel time were almost identical with that of resol, and quite difference 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.

Keywords: Phenol, urea, formaldehyde, cocondensed resins, resol curing, thermal property, adhesive strength, plywood

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Ohyama, Masahiko; Tomita, Bunichiro; Hse, Chung-Yun 1995. Curing property and plywood adhesive performance of resol-type phenol-urea-formaldehyde cocondensed resins. Holzforschung, Vol. 49: 87-91

 


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