Soft solvent-free flame-retardant polyurethane synthetic leather and preparation method therefor

US11773302B2 · kind B2 · utility

Assignee

• ANHUI ANLI MATERIAL TECHNOLOGY CO., LTD. · CN

Inventors

• Heping Yao · Daguantang, CN
• Yuanzhou Song · Daguantang, CN
• Yanwu Wang · Hefei, CN
• Wanli Huang · Daguantang, CN
• Yifeng Wang · 流花街道, CN
• Kejian Yao · Hangzhou City, CN
• Ruilin Wang · Beijing, CN
• Sen Wang · Daguantang, CN
• Yundong Luo · Daguantang, CN
• Yongzhi Chen · Daguantang, CN

Key dates

• Filing date: Dec 19, 2018
• Grant date: Oct 3, 2023
• Expiry date: Dec 14, 2039

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06N2211/28
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed are a soft solvent-free flame-retardant polyurethane synthetic leather and a preparation method therefor. The soft solvent-free flame-retardant polyurethane synthetic leather comprises an antifouling layer, a surface layer, an intermediate layer, a bonding layer and a base cloth in sequence from top to bottom, wherein the bonding layer is prepared from component A and an isocyanate; the molar ratio of —NCO in the isocyanate to —OH in the component A is 0.85-0.93; and the component A is composed of a polyhydric alcohol, an inhibition-type catalyst, a flame retardant, a filler and a viscosity modifier in parts by weight.