Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1987-09-04
1989-04-11
Jacobs, Lewis T.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524423, 524424, 524425, 524430, 524431, 524432, 524445, 524447, 524449, 524443, 524451, 524456, 524500, 524538, 524609, 525500, 525537, C08G 7514, C08L 8102
Patent
active
048207594
ABSTRACT:
A polyarylene thioether composition comprising (1) 100 parts by weight of a polyarylene thioether (A) having an average particle size of spherulites of not more than 2 .mu.m, formed upon crystallization of the molten polymer at 250.degree. C., obtained by treating a polyarylene thioether having a repeating unit of ##STR1## as the main constituent and an inherent solution viscosity, which is measured at 206.degree. C. in 1-chloronaphthalene at a polymer concentration of 0.4 g/100 ml solution, of 0.30 to 0.90 dl/g with an aqueous solution of non-oxidative strong acid or non-oxidative strong-acid-weak-base type salt; and (2) 11 to 800 parts by weight of a polyarylene thioether (B) having a necessary time for 50% crystallization of not more than 50 seconds upon crystallization of the molten polymer at 250.degree. C. obtained by treating a polyarylene thioether having a repeating unit of ##STR2## as the main constituent and an inherent solution viscosity, which is measured at 206.degree. C. in 1-chloronaphthalene at a polymer concentration of 0.4 g/100 ml solution, of 0.05 to 0.25 dl/g with an aqueous solution of non-oxidative strong acid or non-oxidative strong-acid-weak-base type salt, is disclosed.
REFERENCES:
patent: 4699975 (1987-10-01), Katto et al.
"Macromolecular Physics", by Bernhard Wunderlich, vol. 2, Crystal Nucleation, Growth, Annealing, Academic Press, pp. 94 to 99.
"Mixed Crystals in Polymer Blends", by Gohil and Petermann; J. Macromol. Sci.-Phys., B18(2), 217-232 (1980).
Ichikawa Yukio
Katto Takayuki
Shiiki Zenya
Jacobs Lewis T.
Kureha Kagaku Kogyo Kabushiki Kaisha
Woodward David W.
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