Method for producing expandable granulates containing polylactic acid

US9212270B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Andreas Füßl · Kressbronn am Bodensee, DE
• Bangaru Sampath · Ludwigshafen am Rhein, DE
• Maximilian Hofmann · Mannheim, DE
• Ingo Bellin · Ludwigshafen am Rhein, DE
• Sameer Nalawade · Mannheim, DE
• Klaus Hahn · Lampertheim, DE
• Andreas Künkel · Neustadt, DE
• Robert Loos · Ludwigshafen, DE

Key dates

• Filing date: Jan 6, 2011
• Grant date: Dec 15, 2015
• Expiry date: May 13, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L67/02
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a process for producing expandable pelletized material which comprises polylactic acid which comprises the following steps: The invention further relates to expandable pelletized material which comprises polylactic acid and which is obtainable by said process, and also to specific expandable pelletized material which comprises polylactic acid and which has a proportion of from 3 to 7% by weight of an organic blowing agent, preferably n-pentane and particularly preferably isopentane. The invention further relates to a preferred process for producing expandable pelletized material which comprises blowing agent and which comprises polylactic acid, and which has low bulk density.