Encapsulated fragrance chemicals

• US 7,125,835 B2
• Filed: 10/10/2002
• Issued: 10/24/2006
• Est. Priority Date: 10/10/2002
• Status: Active Grant

• Current Assignee: International Flavors & Fragrances Incorporated
• Original Assignee: International Flavors & Fragrances Incorporated
• Inventors: Brain, Joseph, Bennett, Sydney William
• Primary Examiner(s): Cole, Monique T.
• Application Number:
  US10/268,526
• Publication Number:
  US 20040072719A1
• Time in Patent Office: 1,475 Days
• Field of Search: 512/4
• US Class Current: 512/4
• 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 3/3723 Polyamines or polyalkyleneimines
• 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 mixture of cationic polymers, in a preferred embodiment the coating polymers are a reaction product of polyamines and (chloromethyl) oxirane or (bromomethyl) oxirane.

Claims

1. A composition comprising:

a fragrance material;

said fragrance material encapsulated by a polymer to provide a polymer encapsulated fragrance;

the polymer encapsulated fragrance is further coated by a cationic polyamine polymer, said cationic polyamine polymer being a reaction product of polyamine and an oxirane material, wherein said oxirane material is selected from the group consisting of (chloromethyl) oxirane, (bromoethyl) oxirane and mixtures thereof.

2. The composition of claim 1 wherein the fragrance is a liquid thereby providing a liquid core to the polymer encapsulated fragrance.

3. The fragrance of claim 1 wherein the fragrance material is not water soluble.

4. The composition of claim 1 wherein the fragrance material is from about 10 to about 50 weight percent of the composition.

5. The composition of claim 1 which is incorporated into a product selected from the group consisting of a personal care, fabric care and cleaning products.

6. The composition of claim 5 wherein the personal care product is selected from the group consisting of hair shampoos, hair rinses, bar soaps, and body washes.

9. The composition of claim 1 wherein the polymer coating comprises a reaction product of polyamines and (chloromethyl) oxirane or (bromomethyl) oxirane and an additional cationic polymers.

10. A wash-off product comprising an olfactory effective amount of the compound of claim 1.

11. The wash-off product of claim 10 wherein the wash-off product is selected from the group consisting of personal care, fabric care and cleaning products.

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

providing a fragrance material;

encapsulating the fragrance material with a polymer to form a polymer encapsulated fragrance;

providing a polyamine polymer to the surface of the polymer encapsulated fragrance to form a cationically coated polymer encapsulated material, said polyamine polymer being a reaction product of polyamine and an oxirane material; and

providing the coated polymer encapsulated material to a rinse off product,

wherein, said oxirane material is selected from the group consisting of (chloromethyl) oxirane, (bromoethyl) oxirane and mixtures thereof.

8. The method of claim 7 wherein the encapsulating polymer is selected from a vinyl polymer;

an acrylate polymer, melamine-formaldehyde;

urea formaldehyde and mixtures thereof.