New Stabilizers and their use for the production of stabilized polyamides and rubber materials

US4897436A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans-Josef Buysch · Krefeld, DE
• Zsolt Szentivanyi · Leverkusen, DE
• Bert Brassat · Krefeld, DE
• Christiane Oppenheimer-Stix · Neuss, DE

Key dates

• Filing date: Jan 11, 1988
• Grant date: Jan 30, 1990
• Expiry date: Jan 11, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Products prepared by reacting isopropenyl phenols or bisphenols of the bisphenol-A type with diphenyl amine, phenothiazin or derivatives thereof in the presence of acidic catalysts are used as stabilizers for polyamides and rubbery materials.