Non-discoloring stabilizers

US3960758A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Josef Witte · Cologne, DE
• Dieter Theisen · Unterschleißheim, DE
• Ernst Roos
• Karl Nutzel

Key dates

• Filing date: Jun 28, 1974
• Grant date: Jun 1, 1976
• Expiry date: Jun 28, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/526
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A non-discoloring stabilizer system for trans-polypentenamer of: PA1 A. a sulphur-containing phenol of the formula: ##SPC1## In which R.sub.1 and R.sub.3 are alkyl groups with 1 to 8 carbon atoms, aralkyl radicals with 7 to 9 carbon atoms and cycloalkyl radicals with 5 to 7 carbon atoms, R.sub.3 represents hydrogen, alkyl groups with 1 to 8 carbon atoms, cyclohexyl, cyclohexenyl or methylcyclohexenyl, R.sub.4 represents alkyl groups with 1 to 12 carbon atoms or ##SPC2## Where R.sub.1, R.sub.2 and R.sub.3 are as defined above, and PA1 B. a phenol ester of phosphorous acid of the formula: ##SPC3## In which R.sub.5 represents an alkyl or cycloalkyl group with 5 to 10 carbon atoms, R.sub.6 and R.sub.7 are the same or different and represent hydrogen, alkyl and cycloalkyl radicals each with 1 to 7 carbon atoms.