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公开(公告)号：US10174145B1
公开(公告)日：2019-01-08
申请号：US15880480
申请日：2018-01-25
IPC分类号： C08F220/46 , C08F220/18 , C08F220/14 , C08L33/10 , G01N21/31 , G01N30/00
摘要： Methacrylic resin having high heat resistance, highly controlled birefringence, excellent color tone and transparency, and excellent moldability is provided. A methacrylic resin comprises a structural unit (B) having a cyclic structure-containing main chain, the structural unit (B) including at least one structural unit selected from the group consisting of an N-substituted maleimide-based structural unit (B-1) and a lactone ring structural unit (B-2), wherein a glass transition temperature is more than 120° C. and 160° C. or less, an amount of a methanol-soluble content is 5 mass % or less relative to 100 mass % of a total amount of the methanol-soluble content and a methanol-insoluble content in the methacrylic resin, and an yellowness index YI measured using a 10 cm optical path length cell for a 20 w/v % chloroform solution of the methanol-insoluble content is 0 to 7.
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公开(公告)号：US11548981B2
公开(公告)日：2023-01-10
申请号：US17042513
申请日：2019-03-29
发明人： Hiroshi Fukuoka , Shoji Otani , Katsuhiro Iwase , Masaaki Aramaki
摘要： A polyphenylene ether having a predetermined structure.
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公开(公告)号：US11286237B2
公开(公告)日：2022-03-29
申请号：US16920753
申请日：2020-07-06
发明人： Katsuhiro Iwase , Harumi Watanabe , Keigo Sasaki
IPC分类号： C08L33/10 , C08F220/14 , C07D207/448 , C08F222/00 , C08L35/06 , C08L33/24
摘要： Provided is a method for manufacturing a methacrylic resin composition having excellent surface processability and displaying excellent preservability of formed surface processing. A method for manufacturing a methacrylic resin composition, wherein the methacrylic resin composition comprises two or more types of methacrylic resins that each have a structural unit (X) having the same type of cyclic structure-containing main chain, the methacrylic resin composition has a Vicat softening temperature of 120° C. to 160° C., methanol-soluble content is contained in an amount of 5 mass % or less relative to 100 mass %, in total, of the methanol-soluble content and methanol-insoluble content, comprising mixing a low molecular weight component and a high molecular weight component.
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4.发明公开公开(公告)号：US20230192949A1
公开(公告)日：2023-06-22
申请号：US17792813
申请日：2021-01-15
发明人： Tatsuro Toda , Hisanari Yoneda , Takuto Nakata , Shota Ide , Hiroshi Fukuoka , Katsuhiro Iwase , Masaaki Aramaki , Osamu Haba , Yusuke Tazawa
CPC分类号： C08G64/0208 , C08G64/305 , C08L69/00
摘要： A polycarbonate resin comprising a structural unit represented by the following formula (1), wherein weight-average molecular weight Mw measured by size-exclusion chromatography using polymethyl methacrylate as a standard sample is 50,000 or larger and 500,000 or smaller:
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公开(公告)号：US10017627B1
公开(公告)日：2018-07-10
申请号：US15912902
申请日：2018-03-06
发明人： Katsuhiro Iwase , Keigo Sasaki , Harumi Watanabe , Toshiharu Seyama , Fumiki Murakami , Miyuki Kazunori
摘要： A methacrylic resin composition having high heat resistance, excellent birefringence, and excellent heat stability and molding processability is provided. A methacrylic resin composition comprises: a methacrylic resin including a structural unit (X) having a cyclic structure-containing main chain, the structural unit (X) being at least one type selected from the group consisting of an N-substituted maleimide monomer-derived structural unit, a glutarimide-based structural unit, and a lactone ring structural unit; and an organic phosphorous compound, wherein a glass transition temperature is more than 120° C. and 160° C. or less, a content of a phosphorus element is 10 mass ppm to 1000 mass ppm, and a ratio P3/P5 of an integral value P3 of a spectral peak assigned to trivalent phosphorus to an integral value P5 of a spectral peak assigned to pentavalent phosphorus in 31P-NMR measurement is 0.2 to 5.0.
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