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US 4,043,971 AGranted
Thermoplastic polybutylene terephthalate molding compositions of improved tracking resistance
AssigneeBASF SE
InventorsRolf Wurmb, Joachim Kunde, Johannes Schlag, Hans Georg Dorst
Life of this patent
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Abstract
Thermoplastic polybutylene terephthalate molding compositions containing calcium sulfate and/or barium sulfate to increase the tracking resistance.
Claims4
Molding compositions of polybutylene terephthalate having improved tracking resistance and containing as fillers, CaSO.sub.4, BaSO.sub.4 or mixtures thereof in amounts of from 5 to 60% by weight of the total weight of the composition.
Dependencies are inferred from the claim text.