Polyphenylene ether resins having bimodal molecular weight distr

Details Polyphenylene ether resins having bimodal molecular weight distr Polyphenylene ether resins having bimodal molecular weight distr

1984-11-08

1986-05-13

Ivy, C. Warren

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528212, 525390, C08G 6544

Patent

active

045888060

ABSTRACT:
New forms of polyphenylene ether resin have been discovered that are characterized by two distinct molecular weight distributions as determined by gel permeation chromatography. Two maxima are exhibited, one of which corresponds to a polystyrene equivalent molecular weight greater than 30,000, the other of which is less than 30,000. The polymers, which may be termed "bimodal", have improved melt flow in comparison with conventional (unimodal) polyphenylene ether resins.

REFERENCES:
patent: 3432466 (1969-03-01), Hay
patent: 4092294 (1978-05-01), Bennett
patent: 4156772 (1979-05-01), Loucks
patent: 4156773 (1979-05-01), Loucks
patent: 4340696 (1982-07-01), White
patent: 4463164 (1984-07-01), Dalton
patent: 4496679 (1985-01-01), Hambrecht
Journal of Polymer Science: Part A-1, vol. 10, No. 6, pp. 1565-1578; Article by D. M. White et al.

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