Title:
【発明の名称】透明耐熱樹脂の製造方法
Document Type and Number:
Japanese Patent JP2594289
Kind Code:
B2
Abstract:
PURPOSE:To prepare the title resin which provides a molded product excellent in transparency and heat resistance and suitable for lens, optical disc and optical fiber, by imidating with a prim. amine a copolymer of a monomer such as an alkyl methacrylate, an unsatd. dicarboxylic acid anhydride and a monomer copolymerizable therewith. CONSTITUTION:A copolymer is obtd. by the soln. polymn. of 100pts.wt. monomer mixture consisting of 40-99wt.% alkyl methacrylate monomer (A) of the formula as shown (where R is at least 1C alkyl), 60-1wt.% unsatd. discarboxylic acid anhydride (B) (e.g., maleic anhydride) and 0-50wt.% monomer (C) copolymerizable therewith, e.g., (alpha-methyl)styrene, in presence of 0.01.-2pts.wt. polymn. initiator in 5-400pts.wt. solvent such as cyclohexanone at 50-150 deg.C. The obtd. copolymer is imidated with a prim. amine (D) (e.g., 2,6-dimethylaniline) in an amt. of at least 0.8mol. equivalent at 80-350 deg.C.
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Inventors:
Nobuyuki Hayashi
Tetsuro Maeda
Tetsuro Maeda
Application Number:
JP23624687A
Publication Date:
March 26, 1997
Filing Date:
September 22, 1987
Export Citation:
Assignee:
DENKI KAGAKU KOGYO KABUSHIKI KAISHA
International Classes:
C08F8/32; C08F8/48; G11B7/24047; G11B7/2533; (IPC1-7): C08F8/48; C08F8/32
Domestic Patent References:
| JP6160705A | ||||
| JP60188407A |