Fibrous structures having a durable fragrance and a process for preparing the same

• US 4,917,920 A
• Filed: 07/31/1989
• Issued: 04/17/1990
• 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: Tanaka, Hiromi, Ito, Toru, Miyamoto, Osamu, Takeda, Toshihide, Kametani, Hiroshi, Tokura, Susumu, Nakao, Hitomi, Tokuoka, Shuji, Makino, Shoso, Ono, Akira, Fuse, Toshikazu, Yamato, Yoshihisa
• Primary Examiner(s): Bell, James J.
• Application Number:
  US07/387,958
• Time in Patent Office: 260 Days
• Field of Search: 427/389.9, 428/283, 428/402, 428/407, 428/905
• US Class Current: 427/389.9
• 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 process for preparing a durable, fragrant fibrous structure, which comprises applying a treating liquid comprising microcapsules composed of an external wall of a formaldehyde based resin enclosing a fragrant substance and a low temperature reactive organopolysiloxane prepolymer emulsion 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.

2. A process as claimed in claim 1, wherein said fibrous structure is subjected to a water repellent treatment prior to said application of the treating liquid.

3. A process as claimed in claim 1, wherein said treating liquid contains a pressure absorbing agent.

4. A process for preparing a durable, fragrant fibrous structure, which comprises applying a treating liquid of pH 7˜

10 comprising microcapsules composed of an external wall of a formaldehyde based resin enclosing a fragrant substance, a pressure absorbing agent, a low temperature reactive blocked isocyanate prepolymer emulsion and a metallic salt of a fatty acid 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.

5. A process for preparing a durable, fragrant fibrous structure, which comprises applying a treating liquid comprising microcapsules composed of an external wall of a formaldehyde based resin enclosing a fragrant substance, a pressure absorbing agent and an acrylic or methacrylic emulsion obtained by emulsion polymerization of a monomer containing at least one vinyl group 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.

6. A process for preparing a durable, fragrant fibrous structure, which comprises applying a treating liquid comprising microcapsules composed of an external wall of a formaldehyde based resin enclosing a fragrant substance, a pressure absorbing agent and a polyalkylene polymer emulsion 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.

7. A process for preparing a durable, fragrant fibrous structure, which comprises applying a treating liquid comprising microcapsules composed of an external wall of a formaldehyde based resin enclosing a fragrant substance, a pressure absorbing agent and a polyester resin emulsion formed from a polyhydric alcohol and a polybasic acid 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.

8. A process for preparing a durable, fragrant fibrous structure, which comprises applying a treating liquid comprising microcapsules composed of an external wall of a formaldehyde based resin enclosing a fragrant substance, a pressure absorbing agent and a polyurethane resin emulsion formed from a diisocyanate and a polyol 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.