Polyurethane-based expandable polymer particles

US9447249B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Patrick Spies · Ludwigshafen, DE
• Frank Braun · Ludwigshafen, DE
• Carsten Schips · Speyer, DE
• Frank Prissok · Bohmte, DE
• Peter Gutmann · Ludwigshafen am Rhein, DE
• Klaus Hahn · Lampertheim, DE
• Bernhard Schmied · Bischofswerda, DE

Key dates

• Filing date: Jul 5, 2013
• Grant date: Sep 20, 2016
• Expiry date: Aug 19, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/08
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Expandable-polymer-particle material comprising at least one thermoplastic polyurethane (TPU) with Vicat softening point (in accordance with ISO 306/ASO) below 80° C. and from 5 to 95% by weight of at least one polymer obtainable via free-radical polymerization, based on the entirety of TPU and of the polymer obtainable via free-radical polymerization, where the polymer obtainable via free-radical polymerization has been bonded to the TPU in a manner that gives a comb polymer, graft polymer, or copolymer, is suitable for the production of moldings, in particular for use as insulation material.