Title:
メタクリル系樹脂成形体、光学部品又は自動車部品
Document Type and Number:
Japanese Patent JP7025979
Kind Code:
B2
Abstract:
Provided is a methacrylic resin shaped product having high heat resistance, highly controlled birefringence, and excellent color tone and transparency. The methacrylic resin shaped product comprises a methacrylic resin or a composition containing the methacrylic resin. The methacrylic resin includes a structural unit (B) having a cyclic structure including at least one structural unit selected from the group consisting of an N-substituted maleimide structural unit (B-1) and a lactone ring structural unit (B-2) in a main chain, and has a glass transition temperature of higher than 120° C. and not higher than 160° C. Methanol-soluble content in the methacrylic resin is 5 mass % or less relative to 100 mass %, in total, of the methanol-soluble content and methanol-insoluble content. Yellowness index (YI) measured with respect to a 20 w/v % chloroform solution of the methanol-insoluble content using a 10 cm optical path length cell is 0 to 7.
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Inventors:
Junichi Yoshida
Harumi Watanabe
Yu Tada
Harumi Watanabe
Yu Tada
Application Number:
JP2018069051A
Publication Date:
February 25, 2022
Filing Date:
March 30, 2018
Export Citation:
Assignee:
ASAHI KASEI KABUSHIKI KAISHA
International Classes:
C08F222/40; C08F8/48; C08F220/14; G02B1/04
Domestic Patent References:
| JP201428956A | ||||
| JP2017165939A | ||||
| JP2001151814A | ||||
| JP2004168882A | ||||
| JP2008299096A | ||||
| JP9324016A | ||||
| JP9151218A |
Attorney, Agent or Firm:
Kenji Sugimura
Mitsutsugu Sugimura
Kengo Yoshida
Mitsutsugu Sugimura
Kengo Yoshida