Fluorinated polyester blend
AssigneeE. I. Du Pont de Nemours and Company
InventorsNeville Everton Drysdale, Fredrik Nederberg
Life of this patent
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Abstract
A fluorinated polyester blend is prepared by melt blending a fluorovinyl ether functionalized polyester with a non-fluorinated polyester. The fluoroether functionalized polyester can be a homopolymer or a copolymer. The blend is useful for preparing fibers, yarns, fabrics, garments, carpets, and other shaped articles. The shaped articles exhibit durable soil, oil, and water repellency.
Claims14
A blend composition comprising a first aromatic polyester selected from the group consisting of poly(trimethylene terephthalate) (PTT), poly(ethylene naphthalate) (PEN), poly(ethylene isophthalate), poly(trimethylene isophthalate), poly(butylene isophthalate), mixtures thereof, and copolymers thereof, and a second aromatic polyester in contact therewith, wherein the second aromatic polyester is present in the composition at a concentration in the range of 0.1 to 10% by weight of the total composition;
- and, wherein the second aromatic polyester comprises a molar concentration in the range of 40 to 100 mol-% of fluorovinylether functionalized repeat units represented by structure I
- 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 structure II
- with the proviso that only one R can be OH or the radical represented by the structure (II) II;
- R1 is a C2-C4 alkylene radical which can be branched or unbranched;
- X is O or CF2;
- Z is H or Cl;
- a=0 or 1;
- and,
- Q represents structure Ia
- 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.
A process of producing a blend composition comprising combining a first aromatic polyester selected from the group consisting of poly(trimethylene terephthalate) (PTT), poly(ethylene naphthalate) (PEN), poly(ethylene isophthalate), poly(trimethylene isophthalate), poly(butylene isophthalate), mixtures thereof, and copolymers thereof, with a second aromatic polyester to form a combination wherein the second aromatic polyester is present in the combination at a concentration in the range of 0.1 to 10% by weight of the total composition;
- heating the combination to a temperature between the softening point of the first aromatic polyester and the degradation temperature of at least one component of the combination to form a viscous liquid mixture, and mixing the viscous liquid mixture;
- the second aromatic polyester comprising a molar concentration in the range of 40 to 100 mol-% of fluorovinylether functionalized repeat units represented by structure I
- 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 structure II
- with the proviso that only one R can be OH or the radical represented by the structure II;
- R1 is a C2-C4 alkylene radical which can be branched or unbranched;
- X is O or CF2;
- Z is H or Cl;
- a=0 or 1;
- and,
- Q represents the structure Ia
- 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.
Dependencies are inferred from the claim text.