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公开(公告)号：US20170183463A1
公开(公告)日：2017-06-29
申请号：US15304970
申请日：2015-04-16
Applicant: KURARAY CO., LTD.
Inventor： Atsuhiro NAKAHARA , Toru ABE , Yusaku NOMOTO
Abstract: A methacrylic resin composition that has high transparency and a small phase difference in the thickness direction, and is easily stretched is provided. A methacrylic resin composition according to the present invention includes a methacrylic resin and a polycarbonate resin, in which the polycarbonate resin has a viscosity-average molecular weight larger than 15,000 and smaller than 32,000, a content of the polycarbonate resin based on 100 pts.mass of the methacrylic resin is no less than 1 pts.mass and no greater than 4 pts.mass, and a total amount of the methacrylic resin and the polycarbonate resin based on the methacrylic resin composition is 80 to 100 mass %.
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公开(公告)号：US20170226249A1
公开(公告)日：2017-08-10
申请号：US15502818
申请日：2015-08-12
Applicant: KURARAY Co., Ltd.
Inventor： Toru ABE , Atsuhiro NAKAHARA , Hiroshi OZAWA
IPC: C08F220/14 , C08J5/18
CPC classification number: C08F220/14 , C08J5/18 , C08J2333/12 , C08F2220/1875 , C08F230/02 , C08F220/06
Abstract: A copolymer comprising a structural unit (I) derived from a phosphonate monomer (1) such as diethyl methacryloyloxymethyl phosphonate and diethyl 2-methacryloyloxyethyl phosphonate, a structural unit (II) derived from a radical polymerizable monomer (2) such as methacrylic acid, acrylic acid, 8-tricyclo[5.2.1.02,6]decanyl methacrylate, and t-butyl methacrylate, and a structural unit (III) derived from methyl methacrylate, the content of phosphorus atoms derived from the phosphonate monomer (1) being not less than 1.0% by mass and less than 2.0% by mass relative to the mass of the copolymer, and a formed article comprising the copolymer.
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公开(公告)号：US20170313834A1
公开(公告)日：2017-11-02
申请号：US15526204
申请日：2015-11-11
Applicant: KURARAY CO., LTD.
Inventor： Nobutaka HIRAOKA , Toru ABE , Atsuhiro NAKAHARA , Yuuki TAKASUKA , Masayasu OGUSHI
CPC classification number: C08J5/18 , C08J2333/10 , C08J2463/00 , C08J2469/00 , C08L33/10 , C08L69/00 , C08L71/10 , G02B1/10
Abstract: A methacrylate resin composition containing a methacrylate resin and a phenoxy resin and a film consisting of the same, each having high transparency, small phase differences in a thickness direction, low heat shrinkage rate, high strength and good adhesion properties are provided. The methacrylate resin composition contains a methacrylate resin with a triad syndiotacticity (rr) of equal to or more than 58% and a phenoxy resin, and the content of the phenoxy resin per 100 parts by mass of the methacrylate resin is in a range of 0.1 to 8 parts by mass, and the total content of the methacrylate resin and phenoxy resin is 80 mass % or more.
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Patent Agency Ranking
公开(公告)号：US20200377688A1
公开(公告)日：2020-12-03
申请号：US16488102
申请日：2018-02-21
Applicant: KURARAY CO., LTD.
Inventor： Nobutaka HIRAOKA , Toru ABE , Taketomo YAMASHITA , Takuro NIIMURA , Atsuhiro NAKAHARA
Abstract: A methacrylic resin composition comprising 100 parts by mass of a methacrylic resin having an amount of a terminal double bond of less than 0.012% by mole and an amount of a bonded sulfur atom of preferably less than 0.25% by mole; 5×10−6 to 9×10−3 part by mass of a metal element having an atomic number of not more than 20 (preferably lithium element and aluminum element); and 0.025 to 0.50 part by mass of a hindered phenol antioxidant such as 2,6-bis(1,1-dimethylethyl)-4-methylphenol, wherein the methacrylic resin composition, when being exposed to a nitrogen gas atmosphere at 290° C. for 15 minutes, has a thermogravimetric retention of not less than 98% by mass.
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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。
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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
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.
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公开(公告)号：US20170010390A1
公开(公告)日：2017-01-12
申请号：US15113736
申请日：2015-01-23
Applicant: KURARAY CO., LTD.
Inventor： Atsuhiro NAKAHARA , Toru ABE , Yusaku NOMOTO , Wataru TSUJI , Yuuki TAKASUKA , Takao HOSHIBA
CPC classification number: G02B1/14 , C08J5/18 , C08J2333/12 , C08J2469/00 , C08L33/12 , C08L69/00 , G02B5/3033
Abstract: A film obtained by molding a methacrylic resin composition, the methacrylic resin composition comprises: a methacrylic resin having a triad syndiotacticity (rr) of not less than 50% and a weight average molecular weight of 80000 to 200000 and comprising not less than 92% by mass of a structural unit derived from methyl methacrylate, and a polycarbonate resin having an MVR of 130 to 250 cm3/20 min at 300° C. and 1.2 Kg, in which a mass ratio of the methacrylic resin to the polycarbonate resin is 91/9 to 99/1, and the total content of the methacrylic resin and the polycarbonate resin is 80 to 100% by mass. The film is layered to at least one surface of a polarizer to give a polarizing plate.
Abstract translation: 通过成型甲基丙烯酸系树脂组合物而获得的薄膜，所述甲基丙烯酸系树脂组合物包含：具有三元组间同立构规整度（rr）为50％以上且重均分子量为80000〜200000且包含不小于92％ 衍生自甲基丙烯酸甲酯的结构单元的质量和在300℃下具有130至250cm 3 / 20min的MVR和1.2Kg的聚碳酸酯树脂，其中甲基丙烯酸树脂与聚碳酸酯树脂的质量比为91 / 9〜99/1，甲基丙烯酸系树脂和聚碳酸酯树脂的总含量为80〜100质量％。 将膜分层至偏振片的至少一个表面，得到偏振片。
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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。
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