Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
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.
Lee Chih-Tsung
Ma Chen-Chi Martin
Wu Hew-Der
Gulakowski Randy
National Science Council
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