Durable finishes for textiles
The present invention relates to textile treatment compositions for imparting desirable characteristics durably to textile fibers and fabrics, including softness, hydrophobicity, oleophobicity, surface lubricity, abrasion resistance, tear resistance, improved drape, and pilling resistance. More particularly, in one embodiment, the invention is directed to preparations that comprise a carboxylate-functionalized fluorinated polymer and a catalyst that is capable of forming reactive anhydride rings between carboxyl groups on the polymer. In another embodiment, the invention is directed to preparations comprising a polymeric softener having at least one anhydride functional group or at least one reactive group capable of forming an anhydride functional group, together with a catalyst for forming anhydrides from the reactive group or groups. In either embodiment, the resulting reactive anhydride rings bind to substrates, such as textiles and other webs, having free sulfhydryl, alcohol, or amine groups. The invention is further directed to the process for treating textiles and other webs with desirable finishes durable to repeated cleanings. This invention is further directed to the yarns, fibers, fabrics, textiles, finished goods, or nonwovens (encompassed herein under the terms “textiles” and “webs”) treated with the textile-reactive preparations of the invention. Such textiles and webs exhibit a greatly improved, durable characteristics, such as softness and/or hydrophobicity, even after multiple launderings.
1. A preparation for treating a textile, the preparation comprising i) a polymer that contains two or more reactive carboxyl groups, at least two of them positioned such that they may form a 5- or 6-membered anhydride ring, wherein said polymer is a fluorinated polymer; and ii) an anhydride-forming catalyst.
2. The preparation according to claim 1 wherein said fluorinated polymer comprises one or more fluorinated monomers of the structure:
wherein
m is 0 to 2;
n is 0 or 1;
o is 1 or 2;
A is —SO 2 —, —N(W)—SO 2 —, —CONH—, —CH 2 —, or —CF 2 —;
R is a linear, branched, or cyclic fully- or partially-fluorinated hydrocarbon;
W is hydrogen or C 1 -C 4 lower alkyl; and
X is acrylate (H 2 C═CHCO 2 —), methacrylate (H 2 C═C(CH 3 )CO 2 —), or a carbon—carbon double bond (H 2 C═CH—).
3. A preparation for treating a textile, the preparation comprising i) a polymer that contains two or more reactive carboxyl groups, at least two of them positioned such that they may form a 5- or 6-membered anhydride ring; and ii) an anhydride-forming catalyst, wherein said polymer is a softener comprising rubbery hydrophobic groups.
4. The preparation according to claim 3 wherein said rubbery hydrophobic groups are selected from the group consisting of monomers, oligomers and polymers of isoprene, chloroprene, butadiene, ethylene, isopropylene, etheyleneoxide, isobutylene, propylene, chlorinated ethylene, polydimethylsiloxane, polyisobutylene, poly-alt-styrene-co-butadiene, poly-random-styrene-co-butadiene, and mixtures and copolymers thereof.
5. A preparation for treating a textile, the preparation comprising a copolymer of i) fluorinated monomer that contains an anhydride functional group and ii) a rubbery hydrophobic group.
6. The preparation according to claim 5 wherein said rubbery hydrophobic group is selected from the group consisting of monomers, oligomers and polymers of isoprene, chloroprene, butadiene, ethylene, isopropylene, ethyleneoxide, isobutylene, propylene, chlorinated ethylene, polydimethylsiloxane, polyisobutylene, poly-alt-styrene-co-butadiene, poly-random-styrene-co-butadiene, and mixtures and copolymers thereof.