Fibrous structures having a durable fragrance

• US 4,882,220 A
• Filed: 01/26/1989
• Issued: 11/21/1989
• Est. Priority Date: 02/02/1988
• Status: Expired due to Term

• Current Assignee: Kanebo, Ltd. (HOYU Company Limited)
• Original Assignee: Kanebo, Ltd. (HOYU Company Limited)
• Inventors: Miyamoto, Osamu, Tanaka, Hiromi, Ito, Toru, Ono, Akira, Takeda, Toshihide, Fuse, Toshikazu, Kametani, Hiroshi, Tokura, Susumu, Yamato, Yoshihisa, Nakao, Hitomi, Tokuoka, Shuji, Makino, Shoso
• Primary Examiner(s): Bell, James J.
• Application Number:
  US07/302,435
• Time in Patent Office: 299 Days
• Field of Search: 428/283, 428/405, 428/407, 428/904, 428/905, 428/913, 428/240, 428/323, 428/402
• US Class Current: 442/96
• CPC Class Codes: D06M 13/005 Compositions containing perfumes; Compositions containing deodorants
• CPC Class Codes: D06M 23/12 Processes in which the treating agent is incorporated in microcapsules making microcapsules B01J13/02
• CPC Class Codes: Y10S 428/905 Odor releasing material
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/2982 Particulate matter [e.g., sphere, flake, etc.]
• CPC Class Codes: Y10T 428/2995 Silane, siloxane or silicone coating
• CPC Class Codes: Y10T 428/2998 including synthetic resin or polymer
• CPC Class Codes: Y10T 442/2303 Coating or impregnation provides a fragrance or releases an odor intended to be perceptible to humans

Abstract

A fragrant fibrous structure, such as fabrics, apparels or the like, provided with microcapsules encapsulating a perfume and a resinous binder, preferably a silicone resin in a weight ratio of 2/1 to 1/5, an add-on amount in the aggregate of said microcapsules and resinous binder being 0.3˜7.0% based on the weight of the portion to which said microcapsules and resinous binder are adhered, of the fibrous structure. The process for preparing the above fibrous structures comprises applying a treating liquid comprising microcapsules composed of an external wall of a formaldehyde based resin enclosing a perfume and a resinous binder, preferably a low temperature reactive organopolysiloxane prepolymer emulsion, preferably together with a pressure absorbing agent, to at least a part of a fibrous structure and then drying the fibrous structure at a temperature of less than 150° C. to fix said microcapsules on fiber surfaces of the fibrous structure.

Claims

1. A fragrant fibrous structure which has microcapsules encapsulating a perfume adhered thereto by a resinous binder, the weight ratio of said microcapsules to said resinous binder being between 2:

1 and 1;

5, and the sum of the amounts of said microcapsules and resinous binder being between 0.3 and 7.0%, based on the weight of the portion of the fibrous structure to which said microcapsules and resinous binder are adhered.

2. A fragrant fibrous structure as claimed in claim 1, wherein said weight ratio is between 1:

1 and 1;

3 and the sum of said amounts is between 0.5 and 5.0% by weight.

3. A fragrant fibrous structure as claimed in claim 1, wherein said microcapsules are composed of an external wall comprising a formaldehyde based resin selected from the group consisting of a urea-formaldehyde resin and a melamine-formaldehyde resin.

4. A fragrant fibrous structure as claimed in claim 1, wherein said resinous binder contains a pressure absorbing agent.

5. A fragrant fibrous structure as claimed in claim 1, wherein said resinous binder comprises a silicone resin.

6. A fragrant fibrous structure as claimed in claim 1, wherein said resinous binder comprises an acrylic or methacrylic resin.

7. A fragrant fibrous structure as claimed in claim 1, wherein said resinous binder comprises a polyalkylene.

8. A fragrant fibrous structure as claimed in claim 1, wherein said resinous binder comprises a polyester resin formed from a polyhydric alcohol and a polybasic acid.

9. A fragrant fibrous structure as claimed in claim 1, wherein said resinous binder comprises a polyurethane formed from a diisocyanate and a polyol.

10. A fragrant fibrous structure comprising fibers having s fineness of 0.7 denier or less/filament, which retains microcapsules encapsulating a perfume in interstices of the fibrous structure.

11. A fragrant fibrous structure as claimed in claim 10, wherein said fibrous structure has an interstice ratio of 80% or less and said microcapsules have an average diameter of 1˜

50 μ

.