Method for reducing cold stress whitening

US6774167B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Sabine Oepen · Ellerstadt, DE
• Norbert Niessner · Friedelsheim, DE
• Michael Breulmann · Mannheim, DE
• Norbert Güntherberg · Speyer, DE
• Wil Duijzings · Born, NL

Key dates

• Filing date: Apr 25, 2002
• Grant date: Aug 10, 2004
• Expiry date: Apr 25, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L51/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Undesirable changes in shade brought about by low temperatures (Cold Stress Whitening) in impact-modified thermoplastic molding compositions F which comprise at least one elastomeric graft polymer A and at least one thermoplastic polymer B are reduced by adding from 10 to 200 ppm, based on the molding compositions F, of at least one polyorganosiloxane S to the impact-modified thermoplastic molding composition F.