Method for producing an artificial leather with improved flexing endurance properties

US10093040B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Franz Xaver Redl · Bohmte, DE
• Andreas Emge · Bohmte, DE
• YueXia Feng · Shanghai, CN
• Cheun-Gwo Chen · New Taipei, TW
• Xiao Yang · Lo Wu, CN
• Oliver Reese · Lemförde, DE

Key dates

• Filing date: Sep 10, 2012
• Grant date: Oct 9, 2018
• Expiry date: Jul 29, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24967
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

The present invention relates to a process for production of artificial leather comprising top coat, polyurethane layer and optional substrate layer, said process comprising i) providing a release layer, ii) applying one or more than one layer of a top coat to the release layer to an overall top coat layer thickness in the range from 1 to 500 μm, iii) applying first polyurethane system components comprising an isocyanate component (A) and a polyol component (B) to the top coat to form a first polyurethane layer, wherein the isocyanate index of the first polyurethane system components is in the range from 101 to 140, iv) optionally applying further polyurethane system components to the first polyurethane layer to form further polyurethane layers, v) optionally applying a substrate layer to the polyurethane system components, vi) curing the polyurethane system components to form a polyurethane layer, and vii) separating the release layer from the top coat, wherein the overall thickness of the first and optionally further polyurethane layers is in the range from 0.01 to 20 mm and the polyurethane system components are solvent-free. The present invention further relates to an artificia…