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US 2002/0173566 A1Published application
New polymer mixtures
AssigneeBayer Aktiengesellschaft
InventorsWilfried Haese, James Mason
Life of this patent
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Abstract
A thermoplastic molding composition especially suitable for preparing optical data carriers is disclosed. The composition contains polycarbonate resin, at least one mold release agent and at least one phosphite having a defined structural formula. The optical data carriers include compact discs, video discs, digital versatile discs and further optical data carriers which may be written and erased one or more times
Claims7
A thermoplastic molding composition comprising polycarbonate resin, at least one mold release agent and at least one phosphite conforming structurally to
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- wherein
- n is 0 to 5
- Y independently of one another represents alkyl or aryl group
- m is 1 to 3 and
- X independently of one another represents a methylene radical, with the proviso that either (i) at least one methylene radical is fully substituted by C1-C20 alkyls, or (ii) two substituents of a fully substituted methylene radical together represent a radical
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- in which R1 is a member selected from the group consisting of C2-C18 alkyl, C3-C12 cycloalkyl, C6-C30 alkaryl and aryl radicals, C2-C18 polyhydroxyalkyl containing 2 to 10 hydroxyl groups and C2-C18 polyphenyl radicals containing 2 to 10 phenolic OH groups.
5 more elements
Dependencies are inferred from the claim text.