Heat-stable methacrylic resin composition

Abstract

Abstract PURPOSE:The titled composition which is excellent in heat stability and can give easily a complicated large molding by molding at high temperature, prepared by adding a small amount of a dithiol compound to a methacrylic resin. CONSTITUTION:The titled composition prepared by adding 0.001-0.5pt.wt. dithiol compound (B) (e.g., glycol dimercaptoacetate) to 100pts.wt. methacrylic resin (A) obtained by polymerizing a mixture comprising 50-100wt% methyl methacrylate (a) and 50-0wt% other copolymerizable vinyl monomers (b) (e.g., methacrylates other than (a), maleic anhydride or styrene). Because this composition can form a resin which is excellent in heat resistance and emits no sensible foreign odor, it is possible to obtain stably and easily a complicated large molding by molding at a higher temperature without risk of coloration and of formation of defects such as silver streaks by thermal decomposition of resin A.

Inventors

• 👤 Teruo Hasegawa
• 👤 長谷川　輝夫
• 👤 Koji Arakawa
• 👤 荒川　興二

Bibliographic Details