Thermosetting phenolic resin coating and adhesive compositions

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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Details

528140, 528147, 528153, C08G 820, C08L 6112

Patent

active

041827325

ABSTRACT:
A coating and adhesive composition that may be in finely divided powder form is provided comprising a solid phenolic resole (one-step) resin having a gel time of between 150 seconds to about 250 seconds at 150.degree. C., said resin being the reaction product of bisphenol-A and formaldehyde at a mole ratio between about 2.11 to 2.64 moles of formaldehyde per mole of bisphenol-A in the presence of a catalytic quantity of a condensation catalyst at a temperature of at least about 70.degree. C. that is acidified to a pH from about 3 up to 7 and dehydrated.

REFERENCES:
patent: 3640958 (1972-02-01), Soldatos
patent: 3657188 (1972-04-01), Perkins
patent: 3816558 (1974-06-01), Huck
patent: 4020040 (1977-04-01), Kattoh et al.
patent: 4116921 (1978-09-01), Olivo et al.

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