公开(公告)号：US12077625B2

公开(公告)日：2024-09-03

申请号：US17283191

申请日：2019-10-04

申请人： KURARAY CO., LTD.

发明人： Moe Kawahara ,  Makoto Akai ,  Kanayo Nakada ,  Tomohiro Ono

IPC分类号： C08F299/04 ,  C08J3/12 ,  C08L33/12 ,  C08L53/00

CPC分类号： C08F299/0492 ,  C08J3/12 ,  C08J2353/00 ,  C08L33/12 ,  C08L53/00 ,  C08L53/00 ,  C08L33/12

摘要： Pellets of an acrylic block copolymer (I) having a polymer block (A1) containing methacrylic acid ester units and a polymer block (B1) containing acrylic acid ester units, and an acrylic polymer (II) having 35 mass % or more methyl methacrylate units are provided. The polymer block (B1) is made of methyl acrylate units and acrylic acid ester units of formula CH2═CH—COOR1 (1), wherein R1 represents a C4-C12 alkyl group. A shaped article prepared with the pellets is also provided.

公开(公告)号：US10935697B2

公开(公告)日：2021-03-02

申请号：US16486058

申请日：2018-02-09

申请人： KURARAY CO., LTD.

发明人： Toshiaki Sugawara ,  Makoto Akai ,  Dai Kataoka

IPC分类号： G02B1/04 ,  C08F293/00 ,  C08K3/22 ,  C08K5/524 ,  C08K13/02

摘要： A resin composition is provided which has high transparency, light guiding properties and luminescent properties and can guide light therethrough with little change in chromaticity. A shaped article such as an optical element including the resin composition is also provided. The resin composition includes an acrylic block copolymer (A) and a light diffusing agent (B), wherein the acrylic block copolymer (A) has at least one structure in which polymer blocks (a1) based on methacrylic acid ester units are bonded to both ends of a polymer block (a2) based on acrylic acid ester units, and has a weight average molecular weight of 10,000 to 150,000 and a tensile elastic modulus of 1 to 1,500 MPa, the light diffusing agent (B) is rutile titanium oxide having an average particle size of 0.5 to 2.0 μm, and the content of the light diffusing agent (B) is 0.5 to 10 ppm (on mass basis) based on the acrylic block copolymer (A).

公开(公告)号：US12098305B2

公开(公告)日：2024-09-24

申请号：US17273569

申请日：2019-08-30

申请人： KURARAY CO., LTD.

发明人： Tomohiro Ono ,  Makoto Akai ,  Moe Kawahara ,  Kanayo Nakada

IPC分类号： B32B27/30 ,  C09J133/08 ,  C09J133/10 ,  C09J133/12 ,  C09J153/00

CPC分类号： C09J153/005 ,  C09J2433/00

摘要： A laminate production method is provided which can sufficiently prevent the occurrence of blocking without causing deterioration in the outstanding characteristics of acrylic block copolymers such as adhesive performance, and can also ensure excellent processability during extrusion. The laminate production method includes a step (1) of bringing raw pellets of an acrylic block copolymer (A) into contact with an aqueous dispersion (C) containing acrylic resin particles (B) and no surfactants, the acrylic block copolymer (A) including at least one polymer block (a1) including acrylic acid alkyl ester units and at least one polymer block (a2) including methacrylic acid alkyl ester units, a step (2) of removing water attached to the pellets and thereby obtaining pellets (D), and a step (3) of preparing an adhesive composition using an adhesive feedstock including the pellets (D) from the step (2), and extruding the adhesive composition to form an adhesive layer and thereby producing a laminate including the adhesive layer and a substrate layer.

公开(公告)号：US12006406B2

公开(公告)日：2024-06-11

申请号：US16973924

申请日：2019-05-28

申请人： KURARAY CO., LTD.

发明人： Makoto Akai ,  Tomohiro Ono ,  Moe Kawahara

IPC分类号： C08F220/14 ,  C08F220/18 ,  C08F293/00 ,  C08J3/12

CPC分类号： C08J3/12 ,  C08F220/14 ,  C08F293/00 ,  C08F220/18 ,  C08J2355/00

摘要： Pellets of an acrylic block copolymer are provided which are imparted with sufficient antiblocking properties without deterioration in the outstanding performance of the acrylic block copolymer such as transparency. A method for producing pellets (D) including an acrylic block copolymer (A) includes bringing raw pellets of an acrylic block copolymer (A) into contact with an aqueous dispersion (C) containing acrylic resin particles (B) and no surfactants, the acrylic block copolymer (A) including at least one polymer block (a1) including acrylic acid alkyl ester units and at least one polymer block (a2) including methacrylic acid alkyl ester units, and removing water attached to the pellets.