Para-phenylene sulfie block copolymers process for the...

Details Para-phenylene sulfie block copolymers process for the... Para-phenylene sulfie block copolymers process for the...

C - Chemistry, Metallurgy

08

G

400/2019, 400/30

C08G 75/02 (2006.01) H01L 21/56 (2006.01) H05K 1/05 (2006.01) H01L 23/30 (1985.01)

Patent

CA 1272535

ABSTRACT OF THE DISCLOSURE Disclosed is a para-phenylene sulfide block copolymer comprising a recurring unit (A) Image . The recurring units (A) are present in the form of a block of 20 to 5,000 units of (A) on the average in the molecular chain, and the mol fraction of the recurring units (A) is in the range of 0.50 to 0.98. The block copolymer has a melt viscosity (?*) of 10 to 100,000 poise as determined at 310°C at a shear rate of 200 sec-1 and may have: (a) a glass transition temperature (Tg) of 20 to 80°C, (b) a crystalline melting point (Tm) of 200 to 350°C, and (c) a crystallization index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer. Also disclosed is use of the block copolymer, including for producing molded articles and for producing printed circuit boards.

601685

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