公开(公告)号：US20190016839A1

公开(公告)日：2019-01-17

申请号：US16068998

申请日：2017-01-12

Applicant: KURARAY CO., LTD.

Inventor： Fumihiko OKABE ,  Toru TAKAHASHI ,  Atsuhiro NAKAHARA

IPC: C08F220/14

Abstract: (Meth)acrylate polymers are provided which have a narrow molecular weight distribution on a higher molecular weight side and can impart high shear viscosity stability to lubricating oils.A (meth)acrylate polymer (A) includes specific structural units and is such that in a differential molecular weight distribution curve obtained by gel permeation chromatography (GPC) measurement which shows the polystyrene-equivalent molecular weight of the (meth)acrylate polymer (A) normalized so that the intensity of the peak-top polystyrene-equivalent molecular weight M (t) is 1, the value a represented by a=Log Mh (t1/2)−Log M (t) is not more than 0.12 wherein Mh (t1/2) is the polystyrene-equivalent molecular weight at a point on a higher molecular weight side where the intensity is 0.5.

公开(公告)号：US20170183428A1

公开(公告)日：2017-06-29

申请号：US15323016

申请日：2015-06-30

Applicant: KURARAY Co., Ltd.

Inventor： Atsuhiro NAKAHARA ,  Toru ABE ,  Toru TAKAHASHI ,  Hiroshi OZAWA

IPC: C08F20/18 ,  C08L33/12

CPC classification number: C08F20/18 ,  C08F120/14 ,  C08F265/06 ,  C08F285/00 ,  C08L33/12 ,  C08L2205/025 ,  C08L2205/03 ,  C08L2205/035 ,  C08L69/00 ,  C08L19/003 ,  C08F220/14

Abstract: A methacrylic resin composition comprises not less than 90% by mass and not more than 100% by mass of a methacrylic resin [A] having: the total content of a structural unit derived from methyl methacrylate of not less than 90% by mass; a molecular weight MA of not less than 30000 and not more than 100000 in terms of polystyrene corresponding to the retention time indicating the value of the maximum strength in a chromatogram obtained by gel permeation chromatography; the area SgA of a region enclosed by an approximate curve obtained by fitting the data of a range indicating the strength of not less than 70% relative to the value of the maximum strength to a Gaussian function by the method of nonlinear least squares and the base line of the chromatogram of 45 to 80% of the area SA enclosed by the chromatogram and its base line; and the ratio MwgA/MngA of a weight average molecular weight MwgA to a number average molecular weight MngA of not less than 1.01 and not more than 1.20 in terms of polystyrene computed based on an approximate curve obtained by the above fitting.

公开(公告)号：US20160090479A1

公开(公告)日：2016-03-31

申请号：US14891559

申请日：2014-05-16

Applicant: KURARAY CO., LTD.

Inventor： Toru TAKAHASHI ,  Atsuhiro NAKAHARA ,  Hiroshi OZAWA ,  Toru ABE ,  Yusaku NOMOTO

IPC: C08L33/10

CPC classification number: C08L33/10 ,  C08L23/12 ,  C08L33/12 ,  C08L69/00 ,  C08L2201/10 ,  C08L2203/16 ,  C08L2205/025 ,  C08L2205/03 ,  G02B5/3083

Abstract: A methacrylic resin [1] having a triad syndiotacticity (rr) of not less than 65% and a methacrylic resin [2] having a triad syndiotacticity (rr) of 45 to 58% are melt kneaded in a mass ratio of the methacrylic resin [1]/the methacrylic resin [2] of 40/60 to 70/30, and further melt kneaded preferably with a polycarbonate resin in a ratio of 1 to 10 parts by mass of the polycarbonate resin to the total 100 parts by mass of the methacrylic resin [1] and the methacrylic resin [2] to obtain a methacrylic resin composition.

Abstract translation: 具有不小于65％的三单元间同立构规整度（rr）不小于65％的甲基丙烯酸系树脂[1]和三元组间同立构规整度（rr）为45-58％的甲基丙烯酸树脂[2]以甲基丙烯酸系树脂[ 1] /甲基丙烯酸系树脂[2]为40/60〜70/30，进一步优选以聚碳酸酯树脂为1〜10质量份的聚碳酸酯树脂进行熔融混炼，总共100质量份 甲基丙烯酸树脂[1]和甲基丙烯酸树脂[2]，得到甲基丙烯酸系树脂组合物。

公开(公告)号：US20160096937A1

公开(公告)日：2016-04-07

申请号：US14891544

申请日：2014-05-16

Applicant: KURARAY CO., LTD.

Inventor： Toru TAKAHASHI ,  Atsuhiro NAKAHARA ,  Hiroshi OZAWA ,  Toru ABE ,  Yusaku NOMOTO

IPC: C08J5/18

CPC classification number: C08J5/18 ,  C08F120/14 ,  C08J2333/06 ,  C08J2333/12 ,  C08J2369/00 ,  C08L33/10 ,  C08L33/12 ,  C08L2205/025 ,  G02B5/3033 ,  C08L69/00

Abstract: A film is obtained by forming a methacrylic resin composition comprising 100 parts by mass of a methacrylic resin (A) and preferably 1 to 10 parts by mass of a polycarbonate resin, the methacrylic resin (A) having a triad syndiotacticity (rr) of not less than 58%, a weight average molecular weight of 50000 to 150000, a content of fraction having a molecular weight of not less than 200000 of 0.1 to 10% by mass and a content of fraction having a molecular weight of less than 15000 of 0.2 to 5% by mass. A polarizer protective film comprising the above film is obtained.

Abstract translation: 通过形成包含100质量份甲基丙烯酸系树脂（A），优选1〜10质量份的聚碳酸酯树脂的甲基丙烯酸系树脂组合物，具有三元组间同立构规整度（rr）的甲基丙烯酸系树脂（A） 小于58％，重均分子量为50000至150000，分子量不小于200000的分数为0.1至10质量％，分子量小于15000的分数为0.2 至5质量％。 得到包含上述膜的偏振片保护膜。

公开(公告)号：US20200317838A1

公开(公告)日：2020-10-08

申请号：US16464540

申请日：2017-11-29

Applicant: KURARAY CO., LTD.

Inventor： Toru TAKAHASHI ,  Fumihiko OKABE ,  Atsuhiro NAKAHARA

IPC: C08F220/14 ,  C08F220/18 ,  C08F2/06 ,  C08F6/10 ,  C08K5/01 ,  C08L91/00 ,  C10M145/14

Abstract: A method for producing a polymer solution including a methacrylate copolymer having a weight average molecular weight of not less than 100,000, a weight average molecular weight/number average molecular weight of 1.01 to 1.8 and a glass transition temperature of not more than 40° C. and including methyl methacrylate units and alkyl (meth)acrylate units containing a C10-36 alkyl group, and a first solvent having a boiling point of not less than 200° C., through steps including a step (I) of preparing the methacrylate copolymer by polymerizing monomers in a second solvent having a boiling point of below 200° C., and a step (II) of mixing the solution from the step (I) which includes the methacrylate copolymer and the second solvent, with the first solvent, and removing the second solvent to raise the content of the first solvent to not less than 10 mass % of the polymer solution.

公开(公告)号：US20170158830A1

公开(公告)日：2017-06-08

申请号：US15039070

申请日：2014-11-25

Applicant: KURARAY Co., Ltd.

Inventor： Kaori MAEDA ,  Takuya TSUJIMOTO ,  Toru TAKAHASHI

IPC: C08J5/18 ,  B32B27/30 ,  B32B27/08 ,  B32B15/08

CPC classification number: C08J5/18 ,  B32B15/08 ,  B32B27/08 ,  B32B27/308 ,  B32B2307/412 ,  B32B2307/418 ,  B32B2307/536 ,  B32B2307/538 ,  B32B2551/00 ,  C08J2333/12 ,  C08J2453/00 ,  C08L33/10 ,  C08L53/00 ,  C08L2203/16

Abstract: An acrylic resin film comprising 50 to 99 parts by mass of a methacrylic resin (A) comprising not less than 80% by mass of a structural unit derived from methyl methacrylate, and 50 to 1 part by mass of a block copolymer (B) comprising 40 to 90% by mass of methacrylic acid ester polymer block[s] (b1) and 10 to 60% by mass of acrylic acid ester polymer block[s] (b2), provided that the total of the methacrylic resin (A) and the block copolymer (B) is 100 parts by mass, wherein the methacrylic resin (A) and the block copolymer (B) satisfy the inequations (1) and (2): 0.5≦Mw(A)/Mw(b1)≦2.3  (1) 30000≦Mw(b2)≦120000  (2) in which Mw(A) is the weight average molecular weight of the methacrylic resin (A), Mw(b1) is the largest weight average molecular weight among the methacrylic acid ester polymer block[s] (b1) and Mw(b2) is the largest weight average molecular weight among the acrylic acid ester polymer block[s] (b2).