US 12,221,534 B2
Composition
Tometomo Uchida, Tokyo (JP); Takashi Domoto, Tokyo (JP); Takako Tanigawa, Tokyo (JP); Kenji Nomura, Tokyo (JP); and Yoshitsugu Goto, Tokyo (JP)
Assigned to DENKA COMPANY LIMITED, Tokyo (JP)
Appl. No. 17/293,879
Filed by DENKA COMPANY LIMITED, Tokyo (JP)
PCT Filed Nov. 14, 2019, PCT No. PCT/JP2019/044773
§ 371(c)(1), (2) Date May 13, 2021,
PCT Pub. No. WO2020/101000, PCT Pub. Date May 22, 2020.
Claims priority of application No. 2018-213530 (JP), filed on Nov. 14, 2018.
Prior Publication US 2022/0010116 A1, Jan. 13, 2022
Int. Cl. C08L 23/22 (2006.01); C08K 5/3417 (2006.01); C08K 5/5397 (2006.01); C08L 33/02 (2006.01); C09J 7/10 (2018.01); C09J 133/02 (2006.01)
CPC C08L 23/22 (2013.01) [C08K 5/3417 (2013.01); C08K 5/5397 (2013.01); C08L 33/02 (2013.01); C09J 7/10 (2018.01); C09J 133/02 (2013.01); C09J 2423/00 (2013.01)] 18 Claims
 
1. A composition for temporary bonding, comprising the following (A) to (C):
(A) a (meth)acrylate comprising the following (A-1) and (A-2):
(A-1) a monofunctional (meth)acrylate whose homopolymer has a Tg of −100° C. to 60° C., and
(A-2) a polyfunctional (meth)acrylate having an alicyclic structure;
(B) a polyisobutene homopolymer; and
(C) a photo radical polymerization initiator, and
wherein an amount of the component (A-1) is 54 to 90 parts by mass, an amount of the component (A-2) is 1 to 40 parts by mass, and an amount of the component (B) is 1 to 20 parts by mass, with respect to 100 parts by mass of the total amount of the components (A) and (B).