The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 19, 2023
Filed:
Aug. 26, 2020
Kaneka Corporation, Osaka, JP;
Fuminobu Kitayama, Osaka, JP;
Takuya Kamimura, Osaka, JP;
KANEKA CORPORATION, Osaka, JP;
Abstract
Provided is a resin composition for use in producing a resin film by solution casting, the resin composition including a methacrylic polymer that has excellent heat resistance and that allows for a high evaporation rate of a solvent when the solvent is evaporated from a cast layer in solution casting. The resin composition for use in film production by solution casting includes a methacrylic polymer (a), and the methacrylic polymer (a) is a copolymer including a methyl methacrylate unit and at least one drying-accelerating comonomer unit and has a glass transition temperature of 110° C. or higher. The drying-accelerating comonomer unit is preferably selected from the group consisting of: an N-substituted maleimide monomer unit; a methacrylic ester unit containing an ester moiety in the form of a primary, secondary, or aromatic hydrocarbon group having 2 to 8 carbon atoms; a methacrylic ester unit containing an ester moiety in the form of a saturated hydrocarbon group having a fused ring structure and having 7 to 16 carbon atoms; a methacrylic ester unit containing an ester moiety in the form of a linear or branched group containing an ether bond; and a styrenic monomer unit.