Compatible polymer blends with thermoplastic polycarbonates
AssigneeBayer Aktiengesellschaft
InventorsHolger Lutjens, Karl-Erwin Piejko, Rudiger Plaetschke, Christian Lindner, Jurgen Kirsch
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Abstract
A transparent thermoplastic molding composition containing: A) 30 to 94% of a thermoplastic polycarbonates based on 2,2-bis-(4-hydroxyphenyl)-propane, and B) 6 to 70% of a resin-like vinyl polymer which contains structural units corresponding to formula (Ia) ##STR1## in which R.sup.1 is H or CH.sub.3, R.sup.2 is C.sub.1-4 alkylene and R.sup.3 is C.sub.1-4 alkyl, is disclosed. The composition is particularly suitable for the preparation of optical storage media.
Claims7
A transparent thermoplastic molding composition consisting of
- A) 90 to 40 percent of a thermoplastic polycarbonate based on 2,2-bis-(4-hydroxyphenyl)-propane and
- B) 10 to 60 percent of a resin-like vinyl polymer having a weight average molecular weight of 10,000 to 500,000 and which contains 100% by weight structural units corresponding to formula (Ia) ##STR6## in which R.sup.1 is H or CH.sub.3,
- R.sup.2 is C.sub.1-4 alkylene, and
- R.sup.3 is C.sub.1-4 alkyl.
A transparent thermoplastic molding composition consisting of
- A) 90 to 40 percent of a thermoplastic polycarbonate based on 2,2-bis-(4-hydroxyphenyl)-propane and
- B) 10 to 60 percent of a resin-like vinyl polymer having a weight average molecular weight of 10,000 to 500,000 and which contains 70 to 100% by weight structural units corresponding to formula (Ia) ##STR7## in which R.sup.1 is H or CH.sub.3,
- R.sup.2 is C.sub.1-4 alkylene, and
- R.sup.3 is C.sub.1-4 alkyl,
- and up to 30% by weight of structural units selected from the group consisting of styrene, alpha-methyl styrene and methacrylate, said percent being relative to the total weight of A) and B).
Dependencies are inferred from the claim text.