US 11,807,723 B2
Poly(biphenyl ether sulfone) resin and molded article
Kazuyuki Ito, Tsukuba (JP)
Assigned to SUMITOMO CHEMICAL COMPNAY, LIMITED, Tokyo (JP)
Appl. No. 17/277,556
Filed by SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
PCT Filed Sep. 20, 2019, PCT No. PCT/JP2019/036956
§ 371(c)(1), (2) Date Mar. 18, 2021,
PCT Pub. No. WO2020/066888, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. 2018-180561 (JP), filed on Sep. 26, 2018.
Prior Publication US 2021/0355282 A1, Nov. 18, 2021
Int. Cl. C08G 75/23 (2006.01); C08L 81/06 (2006.01)
CPC C08G 75/23 (2013.01) [C08L 81/06 (2013.01); C08L 2201/08 (2013.01); C08L 2203/30 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A poly(biphenyl ether sulfone) resin substantially comprising a repeating structure of the following formula (1),
wherein a polystyrene equivalent mass average molecular weight Mw and a melt viscosity μ [Pa·s] at a temperature of 350° C. satisfy the following formulas (6) and (7),

OG Complex Work Unit Chemistry
wherein n represents an integer of 1 or more,
60,000≤Mw≤90,000  (6)
0.0906×Mw−4,930≤μ≤3,500  (7).