US 11,932,730 B2
Polyarylene sulfide resin composition, molded article, and optical ferrule
Katsuhei Ohnishi, Fuji (JP)
Assigned to Polyplastics Co., Ltd., Tokyo (JP)
Appl. No. 18/258,664
Filed by Polyplastics Co., Ltd., Tokyo (JP)
PCT Filed Dec. 6, 2021, PCT No. PCT/JP2021/044776
§ 371(c)(1), (2) Date Oct. 26, 2023,
PCT Pub. No. WO2022/138118, PCT Pub. Date Jun. 30, 2022.
Claims priority of application No. 2020-217122 (JP), filed on Dec. 25, 2020.
Prior Publication US 2024/0043620 A1, Feb. 8, 2024
Int. Cl. G02B 6/38 (2006.01); C08G 75/0204 (2016.01); C08K 3/36 (2006.01)
CPC C08G 75/0204 (2013.01) [C08K 3/36 (2013.01); G02B 6/38 (2013.01); C08K 2201/005 (2013.01); C08K 2201/014 (2013.01)] 6 Claims
 
1. A polyarylene sulfide resin composition comprising a polyarylene sulfide resin (A) and silica particles (B), wherein:
the polyarylene sulfide resin (A) has a melt viscosity, as measured at a temperature of 310° C. and a shear rate of 1200 sec−1, of 35 to 80 Pas;
a content of the polyarylene sulfide resin (A) is 25 to 40% by mass based on a mass of the polyarylene sulfide resin composition;
the silica particles (B) comprise smaller-particle-size silica particles (B1) and larger-particle-size silica particles (B2);
a content of the smaller-particle-size silica particles (B1) is 35 to 120 parts by mass based on 100 parts by mass of the polyarylene sulfide resin (A);
a content of the larger-particle-size silica particles (B2) is 100 to 240 parts by mass based on 100 parts by mass of the polyarylene sulfide resin (A);
the smaller-particle-size silica particles (B1) have a mean particle size of 1 μm or less;
the larger-particle-size silica particles (B2) have a mean particle size of 2 μm or more and 10 μm or less;
in sieving a sample of the silica particles (B) in a wet process using a sieve with an opening size of 45 μm, a ratio of a mass of the silica particles (B) on the sieve to a total mass of the sample of the silica particles (B) is 10 ppm by mass or less.