US 11,753,535 B2
Propylene resin composition and shaped body comprising same
Shogo Hioki, Tokyo (JP); and Takeshi Maruyama, Chiba (JP)
Assigned to SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
Appl. No. 17/287,347
Filed by SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
PCT Filed Oct. 17, 2019, PCT No. PCT/JP2019/040858
§ 371(c)(1), (2) Date Apr. 21, 2021,
PCT Pub. No. WO2020/085185, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 2018-198973 (JP), filed on Oct. 23, 2018.
Prior Publication US 2021/0380789 A1, Dec. 9, 2021
Int. Cl. C08L 23/16 (2006.01); C08L 83/04 (2006.01); C08L 23/14 (2006.01)
CPC C08L 23/14 (2013.01) [C08L 23/16 (2013.01); C08L 83/04 (2013.01); C08L 2205/025 (2013.01); C08L 2207/02 (2013.01); C08L 2207/10 (2013.01); C08L 2310/00 (2013.01)] 2 Claims
 
1. A propylene resin composition, comprising:
100 parts by mass of a heterophasic propylene polymer material (A) comprising a propylene polymer (I) and an ethylene-α-olefin copolymer (II);
0.1 to 5 parts by mass of an organo-modified siloxane compound (B) having a weight-average molecular weight of 10,000 to 90,000; and
0.001 parts by mass to 5 parts by mass of a colorant (C),
wherein the propylene polymer (I) is a propylene homopolymer (I-1) or a propylene copolymer (I-2), wherein
the propylene copolymer (I-2) is a copolymer comprising a structural unit derived from propylene and a structural unit derived from at least one olefin selected from the group consisting of ethylene and α-olefins having 4 to 12 carbon atoms, where
an amount of the structural unit derived from at least one olefin selected from the group consisting of ethylene and α-olefins having 4 to 12 carbon atoms relative to 100 mass % of a total mass of the copolymer is 0.05 mass % or more and less than 10 mass %, and
wherein the ethylene-α-olefin copolymer (II) is a copolymer comprising a structural unit derived from ethylene and a structural unit derived from at least one olefin selected from the group consisting of α-olefins having 3 to 12 carbon atoms, where
an amount of the structural unit derived from ethylene relative to 100 mass % of a total mass of the copolymer is 10 mass % or more and 70 mass % or less;
and wherein a ratio of a limiting viscosity of the ethylene-α-olefin copolymer (II) to a limiting viscosity of the propylene polymer (I) is 1 to 20, wherein the limiting viscosity is measured at a temperature of 135° C. in tetralin.