Carpets prepared from yarns comprising a fluorinated polyester blend
View Patent ↗Carpets are prepared from yarns comprising fibers comprising a fluorinated polyester blend 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 carpets exhibit durable soil, oil, and water repellency.
1. A carpet comprising a backing, a yarn tufted into and having a point of contact with the backing, and an adhesive binding the yarn and the backing at the point of contact between the yarn and the backing, the yarn comprising filaments, wherein at least a portion of which the filaments comprise 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 blend composition at a concentration; and, wherein the second aromatic polyester comprises a molar concentration of fluorovinylether functionalized repeat units represented by structure I
wherein,
Ar represents a benzene or naphthalene radical;
each R is independently H, C 1 -C 10 alkyl, C 5 -C 15 aryl, C 6 -C 20 arylalkyl; OH, or a radical represented by the structure (II)
with the proviso that only one R can be OH or the radical represented by the structure II;
R 1 is a C 2 -C 4 alkylene radical which can be branched or unbranched;
X is O or CF 2 ;
Z is H or Cl;
a=0 or 1;
and,
Q represents the structure (Ia)
wherein q=0-10;
Y is O or CF 2 ;
R f 1 is (CF 2 ) n , wherein n is 0-10;
and,
R f 2 is (CF 2 ) p , wherein p is 0-10, with the proviso that when p is 0, Y is CF 2 .
2. The carpet of claim 1 wherein in the blend composition the first aromatic polyester is poly(trimethylene terephthalate).
3. The carpet of claim 1 wherein in the blend composition the second aromatic polyester is present at a concentration of 0.1 to 10% by weight.
4. The carpet of claim 1 wherein in the blend composition the second aromatic polyester the fluorovinylether functionalized repeat unit represented by Structure I is dimethyl 5-(1,1,2-trifluoro-2-(1,1,2,3,3,3-hexafluoro-2-(perfluoropropoxy)propoxy)ethoxy) isophthalate.
5. The carpet of claim 4 wherein the dimethyl 5-(1,1,2-trifluoro-2-(1,1,2,3,3,3-hexafluoro-2-(perfluoropropoxy)propoxy)ethoxy) isophthalate is present in the blend composition at a molar concentration in the range of 40 to 60 mol-%.
6. The carpet of claim 1 wherein in the blend composition the second aromatic polyester the fluorovinylether functionalized repeat unit represented by Structure I is dimethyl 5-(1,1,2-trifluoro-2-(perfluoropropoxy)ethoxy) isophthalate.
7. The carpet of claim 6 wherein the dimethyl 5-(1,1,2-trifluoro-2-(perfluoropropoxy)ethoxy) isophthalate is present at a molar concentration in the range of 40 to 60 mol-%.
8. The carpet of claim 1 wherein the first aromatic polyester is poly(trimethylene terephthalate), the second aromatic polyester is present at a concentration in the range of 1-3% by weight, wherein the second aromatic polyester the fluorovinylether functionalized repeat unit represented by Structure I is dimethyl 5-(1,1,2-trifluoro-2-(1,1,2,3,3,3-hexafluoro-2-(perfluoropropoxy)propoxy)ethoxy) isophthalate present at a molar concentration of 40-60 mol-%.
9. The carpet of claim 1 further comprising individual filaments having a denier per filament in the range of 15 to 25.
10. The carpet of claim 9 further comprising individual filaments having a cross-sectional shape in the form of a modified delta.