Modified phenolic resin toughened by poly (alkylene oxide) and p

Details Modified phenolic resin toughened by poly (alkylene oxide) and p Modified phenolic resin toughened by poly (alkylene oxide) and p

1998-03-05

1999-10-12

Gulakowski, Randy

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

Synthetic resins

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

525507, G08G 6532

Patent

active

059656719

ABSTRACT:
Modified resole and novolac type phenolic resins which are toughened by poly(alkylene oxide) are disclosed. The modified resole type phenolic resin is prepared by the following steps: mixing a poly(alkylene oxide) having a weight average molecular weight of 100,000.about.8,000,000 and phenol in a weight ratio of poly(alkylene oxide): phenol=1.5:1.about.1:1 at an elevated temperature to form a glutinous mixture; mixing the glutinous mixture with an acid catalyst to obtain a viscous mixture having a relatively low viscosity compared to the glutinous mixture; and mixing the viscose mixture with a resole type phenolic resin. The modified novolac type phenolic resin is prepared by directly mixing the glutinous mixture with a liquid novolac type phenolic resin. The amount of the poly(alkylene oxide) mixed is 2.about.10 wt % based on the phenolic resin.

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Chen-Chi Martin Ma, Chih-tsung Lee and Hew-Der Wu. "Pultruded Glass Fiber Reinforced Poly(ethylene oxide) Toughened Novolac Type Phenolic Resin Composites: Mechanical Properties, Morphology and Flame Retardance." Proceeding of the 20th ROC Polymer Symposium, June 1997, pp. 96-96.

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