US 12,441,878 B2
Thermoplastic elastomer composition, laminate structure and method for producing said laminate structure
Moe Kawahara, Ibaraki (JP); Makoto Akai, Ibaraki (JP); Daisuke Konishi, Ibaraki (JP); and Hiromitsu Sasaki, Ibaraki (JP)
Assigned to KURARAY CO., LTD., Okayama (JP)
Appl. No. 17/919,816
Filed by KURARAY CO., LTD., Okayama (JP)
PCT Filed Apr. 8, 2021, PCT No. PCT/JP2021/014852
§ 371(c)(1), (2) Date Oct. 19, 2022,
PCT Pub. No. WO2021/215255, PCT Pub. Date Oct. 28, 2021.
Claims priority of application No. 2020-074825 (JP), filed on Apr. 20, 2020.
Prior Publication US 2023/0235162 A1, Jul. 27, 2023
Int. Cl. C08L 53/02 (2006.01); B32B 27/08 (2006.01); B32B 27/18 (2006.01); B32B 27/30 (2006.01); B32B 27/36 (2006.01)
CPC C08L 53/02 (2013.01) [B32B 27/18 (2013.01); B32B 27/308 (2013.01); B32B 27/08 (2013.01); B32B 27/302 (2013.01); B32B 27/36 (2013.01); B32B 27/365 (2013.01); B32B 2250/24 (2013.01); B32B 2274/00 (2013.01); B32B 2307/536 (2013.01); B32B 2307/54 (2013.01)] 16 Claims
 
1. A thermoplastic elastomer composition comprising an acrylic block copolymer (I) and a hydrogenated block copolymer (II), wherein
the content of the acrylic block copolymer (I) is 70 to 300 parts by mass with respect to 100 parts by mass of the hydrogenated block copolymer (II),
the hydrogenated block copolymer (II) is a hydrogenated product of a block copolymer (P) including
at least two polymer blocks (A1) containing structural units derived from an aromatic vinyl compound,
a polymer block (B1) containing 1 to 100 mass % of structural units (b1) derived from farnesene and 99 to greater than 0 mass % of structural units (b2) derived from a conjugated diene other than farnesene, and
a polymer block (C1) containing less than 1 mass % of structural units (c1) derived from farnesene, and 1 to 100 mass % of structural units (c2) derived from a conjugated diene other than farnesene, wherein
the block copolymer (P) includes at least one polymer block (B1) located at a terminal, and the hydrogenation ratio of carbon-carbon double bonds in the polymer block (B1) and the polymer block (C1) is 50 to 100 mol %,
the mass ratio [(A1)/((B1)+ (C1))] of the polymer blocks (A1) to the total of the polymer block (B1) and the polymer block (C1) is 1/99 to 70/30,
the mass ratio [(A1)/(B1)] of the polymer block (A1) to the polymer block (B1) is 1/99 to 70/30, and
the hydrogenation ratio of carbon-carbon double bonds in the polymer block (B1) is 50 to 100 mol %.