Encapsulated fragrance chemicals

• US 7,585,824 B2
• Filed: 06/12/2003
• Issued: 09/08/2009
• Est. Priority Date: 10/10/2002
• Status: Active Grant

• Current Assignee: International Flavors & Fragrances Incorporated
• Original Assignee: International Flavors & Fragrances Incorporated
• Inventors: Pluyter, Johan Gerwin Lodewijk, Popplewell, Lewis Michael, Zhen, Yueqian, Lee, Kaiping Daniel, Brain, Joseph
• Primary Examiner(s): Hui; San-ming
• Assistant Examiner(s): CRUZ, KATHRIEN ANN
• Application Number:
  US10/460,610
• Publication Number:
  US 20040071746A1
• Time in Patent Office: 2,280 Days
• Field of Search: 424/401, 510/124, 510/101, 512/4
• US Class Current: 510/101
• CPC Class Codes: A61K 2800/5426 cationic
• CPC Class Codes: A61K 8/11 Encapsulated compositions
• CPC Class Codes: A61K 8/8158 Homopolymers or copolymers of amides or imides, e.g. (meth) acrylamide; Compositions of derivatives of such polymers
• CPC Class Codes: A61K 8/84 obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
• CPC Class Codes: A61Q 13/00 Formulations or additives for perfume preparations essential oils or perfumes per se C11B9/00
• CPC Class Codes: A61Q 5/12 Preparations containing hair conditioners
• CPC Class Codes: B01J 13/14 Polymerisation; cross-linking
• CPC Class Codes: C11D 17/0039 Coated compositions or coated components in the compositions, (micro)capsules
• CPC Class Codes: C11D 3/3703 Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C11D 3/3715 Polyesters or polycarbonates
• CPC Class Codes: C11D 3/3749 Polyolefins; Halogenated polyolefins; Natural or synthetic rubber; Polyarylolefins or halogenated polyarylolefins
• CPC Class Codes: C11D 3/505 encapsulated or adsorbed on a carrier, e.g. zeolite or clay

Abstract

A polymeric encapsulated fragrance is disclosed which is suitable for use in personal care and cleaning products. In a preferred embodiment of the invention the fragrance is encapsulated by a first polymer material to form a fragrance encapsulated polymer, the polymer encapsulated shell is then coated with a cationic polymer, preferably a cationic starch and guar.

Claims

1. A method for imparting an olfactory effective amount of fragrance into a wash-off product comprising:

providing a liquid fragrance material;

encapsulating the fragrance material with a mixture of a copolymer of poly acrylamide and acrylic acid and melamine-formaldehyde to form a polymer encapsulated fragrance thereby providing a liquid core to the polymer encapsulated fragrance;

providing a water-soluble cationic polymer which is a cationically modified starch to the surface of the polymer encapsulated fragrance to form a cationically coated polymer encapsulated material; and

providing the cationically coated polymer encapsulated material to a rinse off product.

2. The method of claim 1 wherein the cationically modified starch has a molecular weight of about 250,000 to about 5,000,000.

3. The method of claim 1 wherein the level of cationic polymer is from about 10% to about 500% of the fragrance containing compositions.

4. The method of claim 1 wherein the wash-off product is selected from the group consisting of detergents and fabric conditioners.

5. The method of claim 1 wherein wash-off product is selected from the group consisting of shampoos, hair rinses, body washes and soaps.