公开(公告)号：US20170240739A1

公开(公告)日：2017-08-24

申请号：US15504457

申请日：2015-07-17

Applicant: KURARAY CO., LTD.

Inventor： Seiya SHIMIZU ,  Hirotsugu IDA ,  Kazuhiko MAEKAWA ,  Kenji SHACHI ,  Katsuei TAKAHASHI

IPC: C08L53/00 ,  C08F297/02

CPC classification number: C08L53/00 ,  C08F2/50 ,  C08F8/14 ,  C08F297/026 ,  C08L2201/10 ,  C08L2205/02

Abstract: The invention provides active energy ray curable compositions which exhibit good curability with active energy rays and which have a low viscosity to attain excellent application properties when applied as materials such as adhesives or coatings onto substrates and can give highly flexible cured products upon irradiation with active energy rays. An active energy ray curable composition includes a (meth)acrylic triblock copolymer (A) including a (meth)acrylic polymer block(s) (aA) having an active energy ray curable group containing a partial structure represented by the following general formula (1), and a (meth)acrylic polymer block(s) (bA) having no active energy ray curable groups, and a (meth)acrylic diblock copolymer (B) including a (meth)acrylic polymer block (aB) having an active energy ray curable group containing a partial structure represented by the following general formula (1), and a (meth)acrylic polymer block (bB) having no active energy ray curable groups, the composition having a ratio of Mn (bB)/Mn (bA) in the range of 0.2 to 2.0 wherein Mn (bB) is the number average molecular weight of the (meth)acrylic polymer block (bB) present in the (meth)acrylic diblock copolymer (B), and Mn (bA) is the number average molecular weight of the (meth)acrylic polymer block (bA) present in the (meth)acrylic triblock copolymer (A). (In the formula, R1 is a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms.)