Phenolic resins with improved low temperature processing stabili

Details Phenolic resins with improved low temperature processing stabili Phenolic resins with improved low temperature processing stabili

1979-04-13

1980-07-01

Briggs, Sr., Wilbert J.

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

Synthetic resins

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

260 38, 264328, 528127, 528153, 525503, C08L 6112, C08L 6110

Patent

active

042107326

ABSTRACT:
Phenolic novolak resins are described which are structurally characterized as having from about 55% to about 90% of the available theoretical paraphenyl linkages in the resin chain bridged to a phenyl group. The resin compositions of this invention provide extended resin stability at relatively low temperatures without significant adverse affect on the cure speed at the molding temperature. The resins are especially suited for use in runnerless injection or cold manifold molding processes, but can also be used in transfer, compression and injection molding processes.

REFERENCES:
patent: 2464207 (1949-03-01), Bender et al.
patent: 3390128 (1968-06-01), Hughes et al.
patent: 3963652 (1976-06-01), Tanimura et al.
patent: 3988386 (1976-10-01), Hesse et al.

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