Process for chemically bonding an odor-encapsulating agent to textiles and textiles formed by the process

• US 6,861,520 B1
• Filed: 04/30/2003
• Issued: 03/01/2005
• Est. Priority Date: 04/30/2003
• Status: Expired due to Term

• Current Assignee: Angle Enterprises, LLC
• Original Assignee: Danriver Incorporated (3cems Corporation)
• Inventors: Brown, David Alan, Todd, Donald Eugene
• Primary Examiner(s): Wilson, James O.
• Assistant Examiner(s): Khare, Devesh
• Application Number:
  US10/427,428
• Time in Patent Office: 671 Days
• Field of Search: 536/103, 536/123, 536/20, 536/124, 536/66, 536/116, 514/338, 424/439, 442/83, 812/0, 428/375, 526/303.1, 526/304, 526/328.5, 252/8.61, 510/276
• US Class Current: 536/103
• CPC Class Codes: C08B 37/0012 Cyclodextrin [CD], e.g. cycle with 6 units (alpha), with 7 units (beta) and with 8 units (gamma), large-ring cyclodextrin or cycloamylose with 9 units or more; Derivatives thereof
• CPC Class Codes: C08L 5/16 Cyclodextrin; Derivatives thereof
• CPC Class Codes: D06M 13/005 Compositions containing perfumes; Compositions containing deodorants
• CPC Class Codes: D06M 15/03 Polysaccharides or derivatives thereof
• CPC Class Codes: D06M 2400/01 Creating covalent bondings between the treating agent and the fibre
• CPC Class Codes: Y10T 428/2933 Coated or with bond, impregnation or core
• CPC Class Codes: Y10T 442/2197 Nitrogen containing

Abstract

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.

Claims

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.