Manufacture of creep-free prepregs based on phenolic resins

Details Manufacture of creep-free prepregs based on phenolic resins Manufacture of creep-free prepregs based on phenolic resins

1988-08-18

1990-10-09

Schain, Howard E.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

427221, 427412, 428265, 428278, 428373, 428396, 524541, 528139, 528140, C08L 6114

Patent

active

049621661

ABSTRACT:
In the manufacture of creep-free prepregs based on phenolic resins of the resole type, the reinformcing agents are impregnated with an essentially solvent-free mixture of a phenolic resin and a viscosity controlling amount up to 60% by weight of the resin of an alkali metal metaborate or an alkaline-earth metaborate or a mixture thereof. The resultant compression molded articles exhibit improved strengths.

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Kirk et al., Encyclopedia of Chemical Technology, vol. 3, (1964), pp. 613, 614, 617-619 and 641.
Chem. Abstracts 96:569672t, 1986.

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