Production of a PMMA foam using cross-linking agents, regulators and blowing agents

US10954319B2 · kind B2 · utility

Assignee

• Evonik Operations GmbH · DE

Inventors

• Thomas Richter · Wauseon, US
• Christoph Seipel · Babenhausen, DE
• Kay Bernhard · Darmstadt, DE
• Sivakumara K. KRISHNAMOORTHY · Pfungstadt, DE
• Sebastian Buehler · Glückstadt, DE

Key dates

• Filing date: Mar 21, 2016
• Grant date: Mar 23, 2021
• Expiry date: Jun 25, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2333/12
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to novel types of PMMA foams and also to the production thereof. The recipes used in the production process include particularly crosslinkers and chain transfer agents as recipe constituents, mostly in low concentrations, in addition to suitable blowing agents. It was found that, surprisingly, the invention provides a simple-to-produce stable PMMA foam having very good properties.