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US 7,094,834 B2Granted
Shiny, impact-resistant polystyrol which is resistant to tension cracks
AssigneeBASF SE
InventorsDaniel Wagner, Peter Weinkötz, Herbert Morgenstern, Hans-Jürgen Renner
Life of this patent
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Abstract
A process for increasing the stress-cracking resistance of polystyrene molding compositions, stress-cracking-resistant, glossy polystyrene molding compositions, composite layered sheets or composite layered films with an outer layer of this type, and also processes for producing moldings for refrigeration equipment.
Claims12
A composite layered sheet or composite layered film comprising a substrate layer and an outer layer, wherein the substrate layer is made from an amorphous styrene polymer and the outer layer is made from a polystyrene molding composition comprising
- A) from 70 to 95% by weight of a glossy impact-modified polystyrene (HIPS) which has a surface gloss of more than 40%, measured at an angle of 60° according to DIN 67530, or a mixture thereof with standard polystyrene (GPPS), and
- B) from 5 to 30% by weight of a styrene-based thermoplastic elastomer (STPE).
Dependencies are inferred from the claim text.