| abstract |
Provided are an optical disk substrate and an optical disk formed from an aliphatic polycarbonate resin composition using an aliphatic polycarbonate resin using a biogenic material as a raw material, which has excellent heat resistance and rigidity and excellent signal characteristics with respect to environmental changes. To do. (A) For an aliphatic polycarbonate resin containing 65 to 100 mol% of a structural unit represented by a specific formula, (C) monovalent and / or polyvalent represented by the following formula [3] 0.01 to 2% by weight of a higher fatty acid ester of a monohydric alcohol, and (In the formula, R 1 represents a (t + u) -valent aliphatic hydrocarbon group having 1 to 22 carbon atoms, R 2 represents an alkyl group having 12 to 22 carbon atoms, t represents 0 or a positive integer, u represents a positive integer, and (t + u) represents an integer of 1 to 6.) (D) An aliphatic polycarbonate containing 0.0001 to 0.5% by weight of a phosphorus stabilizer. An optical disk substrate made of a resin composition. [Selection figure] None |