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US 6,784,232 B1Granted
Flame-resistant polycarbonate blends
AssigneeBayer Aktiengesellschaft
InventorsMichael Zobel, Thomas Eckel, Torsten Derr, Dieter Wittmann
Life of this patent
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Abstract
A thermoplastic molding composition that contains a resinous blend with phosphonate amine is disclosed. The resinous blend contains polycarbonate and a graft polymer having a graft substrate rubber selected from among silicone, EP(D)M and acrylate rubbers. The composition exhibits exceptional flame resistance and good mechanical properties such as stress cracking resistance and ease of flow while exhibiting high heat resistance.
Claims12
Blends which contain
- A) polycarbonate and/or polyestercarbonate,
- B) at least one rubber-elastic graft polymer, selected from the group consisting of silicone, EP(D)M and acrylate rubbers as graft substrate,
- C) optionally, at least one thermoplastic polymer, selected from the group consisting of C.1 vinyl (co)polymers and C.2 polyalkylene terephthalates and
- D) 0.1 to 30 parts by wt. (with respect to the entire mixture) of a phosphonate amine of the general formula (I)
- A3-y—N—By (I),
- in which
- A represents a group of the formula (IIa)
- R1 and R2, independently, represent an unsubstituted or substituted C1-C10 alkyl group or an unsubstituted or substituted C6-C10 aryl group,
- R3 and R4, independently, represent an unsubstituted or substituted C1-C10 alkyl group or an unsubstituted or substituted C6-C10 aryl group or
- R3 and R4 together represent an unsubstituted or substituted C3-C10 alkylene group,
- y has the numerical value 0, 1 or 2 and
- B independently, represents hydrogen, an optionally halogenated C2-C8 alkyl group, or an unsubstituted or substituted C6-C10 aryl group.
9 more elements
Dependencies are inferred from the claim text.