Process for chemically bonding an odor-encapsulating agent to textiles and textiles formed by the process
View Patent ↗A process for chemically bonding an odor-encapsulating agent to textiles includes reacting a cyclodextrin with a cross-linking agent capable of forming ether bonds with the cyclodextrin and with the textile material, and curing the textile material treated with a mixture of the cyclodextrin and cross-linking agent. Preferably, the cross-linking agent is imidazolidone, which forms an ether bond with a hydroxyl group on the cyclodextrin and with a hydroxyl group. In textile materials containing cellulose, imidazolidone forms an ether bond with a hydroxyl group on the cellulose. An active agent can be complexed with the cyclodextrin for release. Textiles formed by such a process can comprise an article of clothing adapted to trap odors emanating from a wearer.
1. A process for chemically bonding an odor-encapsulating agent to a textile material, comprising:
providing an odor-encapsulating cyclodextrin and an imidazolidone cross-linking agent in a water bath;
dipping the textile material into the water bath;
removing the textile material from the water bath; and
heating the textile material,
wherein the cyclodextrin is cross-linked with imidazolidone by forming an ether bond between the imidazolidone and the cyclodextrin and the imidazolidone is cross-linked with the textile material by forming an ether bond between the imidazolidone and the textile material.
2. The process of claim 1 , wherein the cyclodextrin is cross-linked with imidazolidone by forming an ether bond between the imidazolidone and a hydroxyl group on the cyclodextrin.
3. The process of claim 1 , wherein the imidazolidone is cross-linked with the textile material by forming an ether bond between the imidazolidone and a hydroxyl group on the textile material.
4. The process of claim 1 , wherein the textile material comprises cellulose and the cyclodextrin is chemically bonded with an ether bond to the cellulose.
5. The process of claim 1 , wherein the cyclodextrin comprises an alpha-cyclodextrin, a beta-cyclodextrin, a gamma-cyclodextrin, a methyl-substituted cyclodextrin, an ethyl-substituted cyclodextrin, a hydroxyalkyl-substituted cyclodextrin, a branched cyclodextrin, an anionic cyclodextrin, a cationic cyclodextrin, a quaternary ammonium cyclodextrin, an amphoteric cyclodextrin, or a mixture thereof.
6. The process of claim 1 , further comprising providing a compound complexed with the cyclodextrin for release.
7. The process of claim 6 , wherein the compound complexed with the cyclodextrin comprises an antimicrobial agent, a perfume, an odor-mitigating chemical, or an insecticide.
8. The process of claim 1 , wherein heating the textile material further comprises heating the textile material at a temperature of about 320° F. for approximately two minutes.
9. The process of claim 1 , further comprising providing in the water bath magnesium chloride to act as a Lewis acid to promote selective cross-linking between the cyclodextrin and the cellulose.
10. The process of claim 1 , further comprising providing in the water bath a wetting agent, a pH adjuster, and a softening agent.
11. The process of claim 8 , further comprising, after removing the textile material from the water bath and before heating the textile material at a temperature of about 320° F. for approximately two minutes,
padding the textile material; and
tentering the textile material by heat drying the textile material under tension.
12. The process of claim 11 , wherein tentering the textile material further comprises heating the textile material between about 320° F. and about 380° F.
13. A process for chemically bonding an odor-encapsulating agent to a cellulose-containing textile material, comprising:
providing an odor-encapsulating cyclodextrin and an imidazolidone cross-linking agent in a water bath;
dipping the textile material into the water bath;
removing the textile material from the water bath; and
heating the textile material in an oven at a temperature of about 320° F. for approximately two minutes,
wherein the cyclodextrin is cross-linked with imidazolidone by forming an ether bond between the imidazolidone and a hydroxyl group on the cyclodextrin; and
wherein the imidazolidone is cross-linked with the cellulose in the textile material by forming an ether bond between the imidazolidone and a hydroxyl group on the cellulose.
14. The process of claim 13 , further comprising providing in the water bath magnesium chloride to act as a Lewis acid to promote selective cross-linking between the cyclodextrin and the cellulose.
15. The process of claim 13 , further comprising providing in the water bath a wetting agent, a pH adjuster, and a softening agent.
16. The process of claim 13 , further comprising, after removing the textile material from the water bath and before heating the textile material at a temperature of about 320° F. for approximately two minutes,
padding the textile material; and
tentering the textile material by heat drying the textile material under tension.
17. The process of claim 16 , wherein tentering the textile material further comprises heating the textile material between about 320° F. and about 380° F.