Boric anhydride solutions and their use as hardeners of resols

Details Boric anhydride solutions and their use as hardeners of resols Boric anhydride solutions and their use as hardeners of resols

1981-01-22

1982-04-06

Schain, Howard E.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

428427, 428436, 428524, 525503, 525505, 525506, C08G 832, C08G 836

Patent

active

043236677

ABSTRACT:
Concentrated boric anhydride solutions containing more than 5% of boric anhydride in an organic solvent selected from mono or polyalcohols, trialkylborate and/or dialkylacetal when the solvent also contains an acid selected from sulfuric acid and/or aromatic acids. These solutions are used as hardeners of formo-phenolic resols, more particularly for the manufacture of laminates comprising glass fibers and formo-phenolic resols.

REFERENCES:
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patent: 2230564 (1941-02-01), Gasnier
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patent: 3298973 (1967-01-01), Quarles et al.
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patent: 3347916 (1967-10-01), Huber
patent: 3679710 (1972-07-01), Forster
patent: 4111911 (1978-09-01), Weissenfels et al.
patent: 4123414 (1978-10-01), Millette

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