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:
Oct. 13, 2020
Filed:
Mar. 27, 2018
Methacrylic resin and production method, molded article, and optical or automotive component of same
Asahi Kasei Kabushiki Kaisha, Chiyoda-ku, Tokyo, JP;
Junichi Yoshida, Tokyo, JP;
Yutaka Tada, Tokyo, JP;
ASAHI KASEI KABUSHIKI KAISHA, Chiyoda-ku, Tokyo, JP;
Abstract
Provided are a methacrylic resin having high heat resistance, highly controlled birefringence, and excellent color tone and transparency, and a production method, a molded article, and an optical or automotive component of the methacrylic resin. The methacrylic resin includes N-substituted maleimide monomer-derived structural units (B) in a main chain thereof in a proportion of 5 mass % to 40 mass %. The N-substituted maleimide monomer-derived structural units (B) include a structural unit represented by formula (1). The methacrylic resin has a glass transition temperature of higher than 120° C. and not higher than 160° C. The content of components that exhibit light absorption at a wavelength of 400 nm in methanol-soluble content of the methacrylic resin is more than 0 mass % and not more than 2 mass % as calculated in terms of N-phenylmaleimide.