公开(公告)号：US20200339724A1

公开(公告)日：2020-10-29

申请号：US16763730

申请日：2018-11-12

Applicant: KURARAY CO., LTD.

Inventor： Junya TAKAI ,  Kenji SHACHI

IPC: C08F299/00

Abstract: Provided are a (meth)acrylic block copolymer exhibiting good active energy ray curability, in particular, curability of a blend thereof with an acrylate monomer, and an active energy ray curable composition comprising the (meth)acrylic block copolymer. The (meth)acrylic block copolymer includes a methacrylic polymer block (A) having an active energy ray curable group including a partial structure represented by the general formula (1) below wherein R1 denotes a hydrocarbon group having 1 to 10 carbon atoms, and W denotes a saturated hydrocarbon group having 1 to 10 carbon atoms, and an acrylic polymer block (B) having no active energy ray curable groups.

公开(公告)号：US20180208700A1

公开(公告)日：2018-07-26

申请号：US15746163

申请日：2016-07-14

Applicant: KURARAY CO., LTD.

Inventor： Seiya SHIMIZU ,  Junya TAKAI ,  Mikiya MATSUURA ,  Kenji SHACHI

IPC: C08F297/02

CPC classification number: C08F297/026 ,  C08F4/54 ,  C08F220/18 ,  C08F299/00 ,  C08F2222/1013 ,  C08F220/14 ,  C08F2220/1858 ,  C08F2220/1825

Abstract: The invention provides a (meth)acrylic block copolymer that exhibits a high curing rate when irradiated with active energy rays and also has a low viscosity. The (meth)acrylic block copolymer includes a methacrylic polymer block (a1) and a methacrylic polymer block (a2) that each have an active energy ray curable group including a partial structure (1) of the following general formula (1), and further includes an acrylic polymer block (B) that has no active energy ray curable groups and is present between the methacrylic polymer block (a1) and the methacrylic polymer block (a2). The content of monomer units derived from methyl methacrylate relative to all monomer units in the methacrylic polymer block (a1) and the methacrylic polymer block (a2) is not less than 30 mass %. The content of monomer units derived from an alkyl acrylate ester having an alkyl group with 6 or more carbon atoms relative to all monomer units in the acrylic polymer block (B) is not less than 40 mass %. In the formula (1), R1 is a hydrogen atom or a hydrocarbon group with 1 to 20 carbon atoms.

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.)

公开(公告)号：US20160177083A1

公开(公告)日：2016-06-23

申请号：US15058519

申请日：2016-03-02

Applicant: KURARAY CO., LTD.

Inventor： Yosuke JOGO ,  Kenji SHACHI ,  Nobuhiro MORIGUCHI

IPC: C08L53/02

CPC classification number: C08L53/025 ,  C08F293/00 ,  C08F297/046 ,  C08L25/08 ,  C08L91/00

Abstract: Provided are a block copolymer and a thermoplastic elastomer composition each of which is excellent in both tensile strength and elastic recovery, and has good abrasion resistance. Specifically, provided are a hydrogenated block copolymer, which is obtained by hydrogenating a block copolymer having two or more polymer blocks (a) each containing a structural unit derived from an aromatic vinyl compound and one or more polymer blocks (b) each containing structural units derived from isoprene and 1,3-butadiene, in which the hydrogenated block copolymer has a crystallization peak temperature (Tc) defined as described below of −3 to 15° C., and a thermoplastic elastomer composition containing the hydrogenated block copolymer: (crystallization peak temperature (Tc)) a peak top temperature of an exothermic peak observed when the temperature of a sample is increased from 30° C. to 150° C. at a rate of temperature increase of 10° C./min and then the sample is cooled to −100° C. at a rate of temperature decrease of 10° C./min, the peak top temperature being measured with differential scanning calorimeter (DSC), is defined as the crystallization peak temperature (Tc).

Abstract translation: 提供一种嵌段共聚物和热塑性弹性体组合物，其均具有优异的拉伸强度和弹性恢复性，并且具有良好的耐磨性。 具体地说，提供氢化嵌段共聚物，其通过氢化具有两个或更多个含有衍生自芳族乙烯基化合物的结构单元的聚合物嵌段（a）的嵌段共聚物和一种或多种含有结构单元的聚合物嵌段（b） 衍生自异戊二烯和1,3-丁二烯的氢化嵌段共聚物，其中氢化嵌段共聚物具有下述定义为-3〜15℃的结晶峰温度（Tc）和含有氢化嵌段共聚物的热塑性弹性体组合物（结晶 峰值温度（Tc））当以10℃/分钟的升温速度将样品的温度从30℃升高至150℃时观察到的放热峰的峰顶温度，然后将样品 以10℃/分钟的温度降低的速度冷却至-100℃，用差示扫描量热计（DSC）测量的峰顶温度定义为结晶峰温度（ Tc）。