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US 4,900,784 AGranted
PBT-PC-rubber-brominated FR high tracking resistance+VO
AssigneeGeneral Electric Company
InventorsFarshid M. H. Tabankia, Jan de Boer
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Abstract
The invention relates to polymer mixtures having a comparative tracking index of more than 400 volts (KC) and a VO-value according to UL-94. The polymer mixtures according to the invention comprise a polybutylene teraphthalate, an aromatic polycarbonate, a brominated polystyrene, and an agent to improve the impact strength.
Claims7
A polymer mixture which consists of the following constituents:
- a. a polybutylene terephthalate;
- b. a brominated polystyrene as a flame retardant, characterized in that the polymer mixture moreover consists of the following constituents;
- c. an aromatic polycarbonate;
- and
- d. agent to improve the impact strength.
2 more elements
Dependencies are inferred from the claim text.