Surface coated polyester-based fibrous substrate

Patent metadata

Field	Value
Publication number	US-9708505-B2
Application number	US-201113807945-A
Country	US
Kind code	B2
Filing date	Jul 13, 2011
Priority date	Jul 14, 2010
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

This invention relates to polyester-based fibrous substrates being surface coated at least partially with a coating composition comprising perfluoropolyethers. Processes of application of the coating compositions are also provided. The polyester-based fibrous substrates after surface coating have improved wear and/or abrasion resistance relative to uncoated fibrous substrates.

First claim

What is claimed is:

1. A coated substrate comprising a fibrous substrate comprising a polyester wherein the fibrous substrate is at least partially coated with a coating composition in an amount sufficient to provide, after drying, 5 to 20 weight-%, of a perfluoropolyether of Formula I, based upon the total weight of the coated substrate:
F—[CF(CF3)-CF2O]n-CF2CF3  (I)

wherein n is an integer from 5 to 100, and
wherein the coating composition consists of the perfluoropolyether of Formula (I), at least one solvent, and optionally, at least one of a thickener, a fragrance, a dye or a combination of the thickener, fragrance or dye.

2. The coated substrate of claim 1 wherein the polyester is selected from polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate or blends thereof.

3. The coated substrate of claim 1 , wherein the polyester is a polytrimethylene terephthalate homopolymer or a polytrimethylene terephthalate copolymer which comprises at least 70 wt % of polytrimethylene terephthalate.

4. The coated substrate of claim 1 wherein the fibrous substrate is selected from fiber, fabric, yarn, or carpet.

5. A process for improving abrasion resistance of a fibrous substrate comprising a polyester comprising the steps of: (i) applying to at least part of the surface of the fibrous substrate a coating composition of a perfluoropolyether of Formula I:
F—[CF(CF3)-CF2O]n-CF2CF3  (I)

wherein n is an integer from 5 to 100, and wherein the coating composition consists of the perfluoropolyether of Formula (I), at least one solvent, and optionally, at least one of a thickener, a fragrance, a dye or a combination of the thickener, fragrance, or dye; (ii) drying the coated fibrous substrate; (iii) optionally rinsing the coated fibrous substrate from step (ii) with water; and drying the rinsed fibrous substrate.

6. The process for improving abrasion resistance of a fibrous substrate of claim 5 wherein applying is selected from brushing, dipping, spraying, padding, roll-coating or foaming.

7. A coated substrate comprising a fibrous substrate comprising a polyester wherein the fibrous substrate is at least partially coated with a coating composition in an amount sufficient to provide, after drying, 0.1 to 20 weight- %, of a perfluoropolyether of Formula I, based upon the total weight of the coated substrate:
F—[CF(CF3)-CF2O]n-CF2CF3  (I)

wherein n is an integer from 5 to 100, and
wherein the coating composition consists of the perfluoropolyether of Formula (I), at least one solvent, and optionally, a thickener, a fragrance, a dye or a combination of the thickener, fragrance or dye.

Assignees

• Hu Tengjiao
• Du Pont

Inventors

• Hu Tengjiao

Classifications

• D02G3/36

  Cored or coated yarns or threads ({D02G3/34, D02G3/40 take precedence}; elastic yarns or threads D02G3/32) · CPC title

• D06N3/12

  with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds {, e.g. gelatine proteins} · CPC title

• D06M2101/32

  Polyesters · CPC title

• D02G3/02

  Yarns or threads characterised by the material or by the materials from which they are made · CPC title

• C08G65/007

  containing fluorine · CPC title