Polyurethane dispersion based synthetic leathers

• US 9,963,822 B2
• Filed: 01/11/2013
• Issued: 05/08/2018
• Est. Priority Date: 01/11/2013
• Status: Active Grant

• Current Assignee: Dow Global Technologies LLC (Dow, Inc.)
• Original Assignee: Dow Global Technologies LLC (Dow, Inc.), Rohm and Haas Company (Dow, Inc.)
• Inventors: Yan, Yunfei, Kang, Ning, Feng, Jiansheng, Shen, Qian, Zhang, Chao, Gu, Weichao, Zhang, Hong Liang
• Primary Examiner(s): Simone, Catherine A
• Application Number:
  US14/759,976
• Publication Number:
  US 20150354133A1
• Time in Patent Office: 1,943 Days
• CPC Class Codes: B32B 2266/0278 Polyurethane
• CPC Class Codes: B32B 27/065 of foam
• CPC Class Codes: B32B 27/308 comprising acrylic (co)polymers
• CPC Class Codes: B32B 5/245 another layer next to it being a foam layer
• CPC Class Codes: C09D 175/06 from polyesters
• CPC Class Codes: D06N 2211/28 Artificial leather
• CPC Class Codes: D06N 3/0059 Organic ingredients with special effects, e.g. oil- or water-repellent, antimicrobial, flame-resistant, magnetic, bactericidal, odour-influencing agents; perfumes D06N3/0065 takes precedence
• CPC Class Codes: D06N 3/0097 Release surface, e.g. separation sheets; Silicone papers
• CPC Class Codes: D06N 3/042 Acrylic polymers D06N3/045 takes precedence
• CPC Class Codes: D06N 3/047 with fluoropolymers
• CPC Class Codes: D06N 3/14 with polyurethanes
• CPC Class Codes: D06N 3/183 the layers are one next to the other
• CPC Class Codes: Y10T 428/24512 Polyurethane
• CPC Class Codes: Y10T 428/249991 Synthetic resin or natural rubbers

Abstract

A multilayer structure including (a) a fabric, (b) a polyurethane foam containing a plurality of cells defined therein, wherein the foam contains at least one surfactant, and (c) a skin layer, wherein the skin layer comprises a wetting agent and an acrylic polymer having a glass transition temperature of −20 degree Celsius or less, and the foam resides between the fabric and the skin layer; and the process of preparing the multilayer structure.

Claims

1. A multilayer structure comprising:

(a) a fabric,

(b) a polyurethane foam containing a plurality of cells defined therein and at least one surfactant,

(c) a skin layer,

wherein the skin layer comprises a wetting agent and an acrylic polymer having a glass transition temperature of −

20 degree Celsius or less, and the foam resides between the fabric and the skin layer, and

(d) a finishing layer, wherein the skin layer resides between the finishing layer and the foam, and the finishing layer comprises a wetting agent, a crosslinked acrylic polymer wherein the acrylic polymer has a glass transition temperature of −

20 degree Celsius or less.

2. The multilayer structure of claim 1, wherein the wetting agent is selected from a silicon surfactant, a fluorine surfactant or mixtures thereof.

3. The multilayer structure of claim 1, wherein the finishing layer is embossed.

4. The multilayer structure of claim 1, wherein the multilayer structure is free of organic solvent.

5. The multilayer structure of claim 1 further comprising (e) a release paper, wherein the finishing layer resides between the skin layer and the release paper.