	US 12,351,694 B2
	Thermoplastic elastomer composition, foamed material and manufacturing method thereof
Wen Wei Cheng, Kaohsiung (TW); Hsi-Hsin Shih, Kaohsiung (TW); Chia-Hung Hsu, Kaohsiung (TW); and Yu Tsan Tseng, Kaohsiung (TW)
Assigned to TSRC Corporation, Kaohsiung (TW)
Filed by TSRC Corporation, Kaohsiung (TW)
Filed on Sep. 18, 2020, as Appl. No. 17/025,875.
Claims priority of provisional application 62/902,573, filed on Sep. 19, 2019.
Prior Publication US 2021/0087347 A1, Mar. 25, 2021
Int. Cl. C08L 31/04 (2006.01); C08J 3/12 (2006.01); C08J 9/00 (2006.01); C08J 9/06 (2006.01); C08J 9/12 (2006.01); C08L 23/0853 (2025.01); C08L 53/02 (2006.01)

CPC C08J 9/0061 (2013.01) [C08J 3/12 (2013.01); C08J 9/06 (2013.01); C08J 9/122 (2013.01); C08L 23/0853 (2013.01); C08L 31/04 (2013.01); C08L 53/02 (2013.01); C08J 2203/06 (2013.01); C08J 2203/08 (2013.01); C08J 2323/08 (2013.01); C08J 2331/04 (2013.01); C08J 2353/00 (2013.01); C08J 2353/02 (2013.01); C08J 2423/08 (2013.01); C08J 2431/04 (2013.01); C08J 2453/00 (2013.01); C08J 2453/02 (2013.01); C08L 2203/14 (2013.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01); C08L 2205/06 (2013.01); C08L 2207/04 (2013.01); C08L 2312/00 (2013.01)]

19 Claims

1. A thermoplastic elastomer composition for foaming, comprising:

(A) an ethylene-based copolymer;

(B) an olefin block copolymer, wherein the olefin block copolymer is different from the ethylene-based copolymer and is an ethylene-1-octene block copolymer, a density range of the ethylene-1-octene block copolymer is 0.860-0.890 g/cm³, and a hardness range of the ethylene-1-octene block copolymer is 60-85A;

(C) an unsaturated aliphatic rubber, wherein the unsaturated aliphatic rubber is ethylene-propylene-diene monomer rubber, a density range of the ethylene-propylene-diene monomer rubber is 0.870-0.910 g/cm³, an ethylene content range of the ethylene-propylene-diene monomer rubber is 60-85% by mass, and a weight average molecular weight range of the ethylene-propylene-diene monomer rubber is 100,000 to 200,000; and

(D) a crosslinking agent; wherein a weight ratio of the unsaturated aliphatic rubber (C) to the olefin block copolymer (B) is 1:1.5 to 1:5; and comprising:

20-45 wt % of the ethylene-based copolymer (A), 30-50 wt % of the olefin block copolymer (B) and 10-25 wt % of the unsaturated aliphatic rubber (C), based on a total weight of the thermoplastic elastomer composition.