Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1991-10-22
1993-01-26
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528129, 528139, 528140, 528142, 528143, 528144, 528147, C08G 810
Patent
active
051823578
ABSTRACT:
One hundred percent thermosetting phenol/formaldehyde (P/F) resin and method of preparation thereof are disclosed. The resin comprises a molar ratio of F/P of about 1.2-1.7, has a softening point of about 80.degree. C. and cures at temperature of about 140.degree.-160.degree. C. The method comprises heating the reactants in a solvent-less system in the presence of an ortho directing catalyst while monitoring the amount of free formaldehyde present in the reaction system.
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DAP Inc.
Jones Richard Lee
Kight III John
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