US 11,951,731 B2
Multilayer body and method for producing same
Daisuke Konishi, Ibaraki (JP); Hiromitsu Sasaki, Ibaraki (JP); and Yuta Tomishima, Ibaraki (JP)
Assigned to KURARAY CO., LTD., Okayama (JP)
Appl. No. 17/802,637
Filed by KURARAY CO., LTD., Okayama (JP)
PCT Filed Feb. 25, 2021, PCT No. PCT/JP2021/007194
§ 371(c)(1), (2) Date Aug. 26, 2022,
PCT Pub. No. WO2021/172470, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 2020-032158 (JP), filed on Feb. 27, 2020.
Prior Publication US 2023/0109535 A1, Apr. 6, 2023
Int. Cl. B32B 7/12 (2006.01); B32B 15/082 (2006.01); B32B 15/18 (2006.01); B32B 27/08 (2006.01); B32B 27/30 (2006.01); B32B 37/10 (2006.01); B32B 37/12 (2006.01)
CPC B32B 7/12 (2013.01) [B32B 15/082 (2013.01); B32B 15/18 (2013.01); B32B 27/08 (2013.01); B32B 27/302 (2013.01); B32B 37/10 (2013.01); B32B 37/12 (2013.01); B32B 2274/00 (2013.01); B32B 2307/536 (2013.01); B32B 2307/538 (2013.01); B32B 2307/542 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A multilayer body comprising a base material (X), an adhesive layer (Y), and a base material (Z) in this order, wherein the adhesive layer (Y) contains a hydrogenated block copolymer (A) obtained by hydrogenating a block copolymer (P) containing a polymer block (a) composed of a structural unit derived from an aromatic vinyl compound and a polymer block (b) composed of a structural unit derived from a conjugated diene, the mass ratio [(a)/(b)] of the polymer block (a) to the polymer block (b) is 1/99 to 50/50, and the adhesive layer (Y) has a storage modulus G′ at 100° C. of 1.20×105 to 4.00×105 Pa;
wherein the polymer block (b) contains 1 to 100% by mass of a structural unit (b1) derived from farnesene and contains 0 to 99% by mass of a structural unit (b2) derived from a conjugated diene other than farnesene.