Method for cross-linking and stabilizing polymers which can be cross-linked radically

US4283505A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Wolfgang Kleeberg
• Wolfgang Rogler · Erlangen, DE
• Wolfgang V. Gentzkow · Erlangen, DE
• Roland Rubner · Königsee, DE

Key dates

• Filing date: May 18, 1979
• Grant date: Aug 11, 1981
• Expiry date: May 18, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/54
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a method for cross-linking radically cross-linkable polymers and for stabilizing such polymers against oxidative and/or thermal decomposition. The method is developed so that rapid and economical cross-linking of radically cross-linkable polymers is obtained in the presence of oxidation inhibitors without adverse effects on the cross-linking process due to the oxidation inhibitor. For this purpose, the invention provides that the cross-linking is carried out in the presence of oxidation inhibitors, wherein the inhibition-active --OH and/or --NH functions are at least partially substituted by protective silyl- and/or silylene groups, the inhibitor molecule containing at least one Si-alkenyl group. The method according to the invention is suitable for use with radical as well as radiation-cross-linkable polymer.