C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/344
C08G 75/02 (2006.01)
Patent
CA 1236642
ABSTRACT OF THE DISCLOSURE By the maintaining an arylenesulfide prepolymer with a melt viscosity of 5 to 3,000 poise at a temperature of 245 to 290°C under a liquid-liquid two-phase separated state in a solvent for 1 to 50 hours, the molecular weight of said prepolymer is increased to a high to ultra-high value while the linearity of the polymer is retained. Such high molecular weight poly- arylene sulfides provide highly heat-resistant thermoplastics useful for parts such as those for electrical instruments and motor vehicles. The process provides a more economical way to produce markedly high molecular weight linear polyarylene sul- phides, without the necessity for cross-linking agents, on organic acid salts.
484413
Iizuka Yo
Iwasaki Takao
Katto Takayuki
Shiiki Zenya
Fetherstonhaugh & Co.
Kureha Kagaku Kogyo Kabushiki Kaisha
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