Optical disk

Abstract

Abstract PURPOSE:To improve vibration resistance, heat resistance and mass productivity by using a non-anaerobic two-pack type acrylic adhesive contg. diene synthetic rubber for at least either of two kinds of specific compsn. CONSTITUTION:This optical disk is constituted of disk-shaped substrates 1a, 1b, recording layers 2a, 2b, protective layers 3a, 3b and the liquid A 4a and liquid B 4b of the non-anaerobic two-pack type acrylic adhesive. The liquid A 4a is the compsn. essentially consisting of alkyl acrylate monoester of 1 to 3C alkyl group and/or alkyl methacrylate monoester of 1 to 3C alkyl group, org. hydroperoxide and polymn. inhibitor. The liquid 4b is the compsn. essentially consisting of alkyl acrylate monoester of 1 to 3C alkyl group and/or alkyl methacrylate monoester of 1 to 3C alkyl group and thioamide compd. In addition, the diene synthetic rubber is incorporated into at least either of the liquid A 4a or the liquid 4b. The vibration resistance, heat resistance and mass productivity are improved in this way.

Inventors

• 👤 Motohisa Taguchi
• 👤 元久 田口

Bibliographic Details