Coated perfume particles

• US 5,154,842 A
• Filed: 02/01/1991
• Issued: 10/13/1992
• Est. Priority Date: 02/20/1990
• Status: Expired due to Term

• Current Assignee: 3M Company, The Procter & Gamble Company
• Original Assignee: 3M Company, The Procter & Gamble Company
• Inventors: Walley, Darlene R., Norbury, Robert J., Scmidt, Diane G., Michael, William R., Buttery, Howard J.
• Primary Examiner(s): Clingman, A. Lionel
• Assistant Examiner(s): PARKS, WILLIAM
• Application Number:
  US07/649,098
• Time in Patent Office: 620 Days
• Field of Search: 252/8.6, 252/8.7, 252/8.8 R, 252/8.9
• US Class Current: 510/523
• CPC Class Codes: C11D 17/0039 Coated compositions or coated components in the compositions, (micro)capsules
• CPC Class Codes: C11D 3/505 encapsulated or adsorbed on a carrier, e.g. zeolite or clay

Abstract

Perfume particles comprise perfume dispersed within certain water-insoluble nonpolymeric carrier materials and encapsulated in a protective shell by coating with a friable coating material. The coated particles allow for preservation and protection of perfumes which are susceptible to degradation or loss in storage and in cleaning compositions. In use, the surface coating fractures and the underlying carrier/perfume particles efficiently deliver a large variety of perfume types to fabrics or other surfaces.

Claims

1. A softener composition, comprising one or more fabric- or fiber-softening or antistatic agents, and perfume particles which comprise from about 5% to about 50% by weight of a perfume dispersed in from about 50% to about 95% by weight of a non solid fatty alcohols or fatty ester carrier material, or mixtures thereof, said alcohols or esters having a molecular weight of from about 100 to about 500, a melting point of from about 37°

C. to about 80°

C., said alcohols or esters being substantially water-insoluble, said particles having a substantially water-insoluble friable coating on their outer surfaces, said coated particles having an average size less than about 350 microns.

2. A composition according to claim 1 wherein the average size of the coated particles is not greater than 150 microns.

3. A composition according to claim 1 wherein the friable coating is an aminoplast polymer.

4. A composition according to claim 3 wherein the coating is the reaction product of an amine selected from urea and melamine, or mixtures thereof, and the aldehyde is selected from formaldehyde, acetaldehyde, glutaraldehyde, or mixtures thereof.

5. A composition according to claim 4 wherein the coating comprises 1% to 30% by weight of the particles.

6. A composition according to claim 5 wherein the carrier material comprises an alcohol selected from the C₁₄ -C₁₈ alcohols.

7. A composition according to claim 5 wherein the carrier material is an ester comprising at least 18 carbon atoms.

8. A softener composition comprising the perfumed particles of claim 6, and a fabric- or fiber-softening or antistatic agent selected from ##STR3## wherein each R is in the C₁₅ -C₁₈ alkyl range;

and (R¹)₂ (CH₃)₂ N+X-, wherein each R₁ group is C₁₂ -C₁₈ alkyl; and

mixtures thereof; and

wherein X is an anion.

9. A method for delivering perfume-releasing particles to the surface of fabrics undergoing a laundering or softening process in a laundering apparatus, comprising adding to said laundering apparatus a detergent composition or a fabric softening composition containing particles according to claim 1, and operating said apparatus in standard fashion with agitation of the machine liquor and fabrics, whereupon the agitation associated with said operation ruptures the coating on said particles, or fractures the particles themselves, sufficiently to allow release of the perfume when said particles become deposited onto said fabrics during said laundering or softening process.