Production of viscoelastic polyurethane systems using block polymers having bonded siloxane blocks as cell openers

US10189965B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Michael Krebs · Hilden, DE
• Roland Hubel · Essen, DE
• Michael Ferenz · Essen, DE
• Marco Wolf · Wesel, DE
• Thomas Guenther · Munich, DE

Key dates

• Filing date: Sep 17, 2015
• Grant date: Jan 29, 2019
• Expiry date: Sep 17, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2483/12
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The use of bonded siloxane block polymers of the general average formula (I) MaM1bDcD1d TeQfGg as additive in the production of PUR foam using at least one polyol component and at least one isocyanate component, wherein the polyol component used has an average hydroxyl number, determined to DIN 53240-1:2012-07, of >56 to <450 mg KOH/g, preferably 57-300 mg KOH/g, and wherein the PUR foam is produced at an isocyanate index of 65 to 108, is described.