Process for reducing the molecular weight of polypropylene

US7030196B2 · kind B2 · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Michael Roth · Herbstein, DE
• Rudolf Pfaendner · Rimbach, DE
• Peter Nesvadba · Marly, CH
• Marie-Odile Zink · Mulhouse, FR

Key dates

• Filing date: May 14, 2001
• Grant date: Apr 18, 2006
• Expiry date: May 14, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/3435
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to the use of known hydroxylamine esters selected from the group consisting of HALS (sterically hindered amine) compounds and novel hydroxylamine esters for the controlled degradation of polypropylene.