# US 8,785,568 B2 · Polymer blend comprising fluorinated block copolyester

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- Number: US 8,785,568 B2
- Document ID: US8785568B2
- Status: Granted
- Kind: B2
- Application number: 13/291,656
- Filed: 2011-11-08
- Published: 2013-05-09
- Granted: 2014-07-22
- Earliest claimed: 2011-11-08
- Assignees: E. I. Du Pont de Nemours and Company
- Applicants: Neville Everton Drysdale; Elizabeth Forrester McCord; Fredrik Nederberg
- Inventors: Neville Everton Drysdale; Elizabeth Forrester McCord; Fredrik Nederberg
- Web page: https://patentgrep.com/patent/US8785568B2

## CPC

- C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence)
- C08G 63/6826: {Dicarboxylic acids and dihydroxy compounds}
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

Disclosed are polymer blends prepared by melt blending a fluorinated block copolyester with a non-fluorinated polyester wherein the fluorinated block copolyester comprises blocks of fluoroether modified aromatic polyester and blocks of unmodified polyester. Suitable block copolyesters have a blockiness index, B, in the range of 0.25 to 1.0. Shaped articles prepared from the blends exhibit oil and soil resistance with high fluorine efficiency.

## Claims

### Claim 1

A polymer blend comprising a poly(alkylene arylate) and 0.1 to 10 weight percent based upon the total weight of the blend of a block copolymer having a blockiness index, B, in the range of 0.56 to 0.8, comprising a first block comprising a plurality of non-fluorinated alkylene arylate repeat units adjacent to one another; and a second block comprising a plurality of fluoroether functionalized alkylene arylate repeat units adjacent to one another; said non-fluorinated alkylene arylate repeat unit represented by Structure I
wherein each R is independently H or C1-C10 alkyl, and R3 is C2-C4 alkylene which can be branched or unbranched;
and, said fluoroether functionalized repeat units are represented by Structure II,
wherein, Ar represents a benzene or naphthalene radical; each R is independently H, C1-C10 alkyl, C5-C15 aryl, C6-C20 arylalkyl; OH, or a radical represented by the Structure (III)
with the proviso that only one R can be OH or the radical represented by the Structure (III);
R1 is a C2-C4 alkylene radical which can be branched or unbranched,
X is O or CF2;
Z is H, Cl, or Br;
a=0 or 1;
and,
Q represents the Structure (IIa)
wherein q=0-10;
Y is O or CF2;
Rf1 is (CF2)n, wherein n is 0-10;
and,
Rf2 is (CF2)p, wherein p is 0-10, with the proviso that when p is 0, Y is CF2.

### Claim 2 (depends on 1)

The polymer blend of claim 1 wherein the poly(alkylene arylate) is poly(trimethylene terephthalate).

### Claim 3 (depends on 1)

The polymer blend of claim 1 wherein the block copolymer R1 is an ethylene radical.

### Claim 4 (depends on 1)

The polymer blend of claim 1 wherein the block copolymer R1 is a trimethylene radical, which can be branched.

### Claim 5 (depends on 1)

The polymer blend of claim 1 wherein the block copolymer R1 is a tetramethylene radical, which can be branched.

### Claim 6 (depends on 1)

The polymer blend of claim 1 wherein the block copolymer each R is H.

### Claim 7 (depends on 1)

The polymer blend of claim 1 wherein the block copolymer the fluoroether functionalized alkylene arylate repeat unit, Ar is a benzene radical, a=1, each R is H, Z is H, R1 is trimethylene, X is O, Y is O, Rf1 is CF2, and Rf2 is (CF2)3, and q=1.

### Claim 8 (depends on 1)

The polymer blend of claim 1 wherein the block copolymer the fluoroether functionalized alkylene arylate repeat unit is represented by the Structure (IVb)

### Claim 9 (depends on 8)

The polymer blend of claim 8 wherein a=1, Z is H, R1 is trimethylene, X is O, Y is O, Rf1 is CF2, and Rf2 is (CF2)3, and q=1.

### Claim 10 (depends on 1)

The polymer blend of claim 1 wherein the block copolymer R3 is trimethylene.

### Claim 11 (depends on 1)

The polymer blend of claim 1 wherein the block copolymer the non-fluorinated repeat unit represented by Structure I is a trimethylene terephthalate diradical.

### Claim 12 (depends on 1)

The polymer blend of claim 1 wherein the block copolymer is a multi-block copolymer.

### Claim 13 (depends on 1)

The polymer blend of claim 1 wherein the block copolymer the non-fluorinated alkylene arylate repeat units and the fluoroether functionalized alkylene arylate repeat units are each present at a molar concentration, and wherein further, the mole ratio of non-fluorinated repeat units to fluoroether functionalized repeat units is in the range of 1.5 to 0.67.