Process for freshening air

Patent metadata

Field	Value
Publication number	US-9545460-B2
Application number	US-201414573436-A
Country	US
Kind code	B2
Filing date	Dec 17, 2014
Priority date	Dec 17, 2014
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

A process for imparting scent to air comprising the steps of: providing a plurality of particles in a reservoir; heating the reservoir to melt the particles to form a melt; and contacting the melt with air; wherein the particles include polyethylene glycol, perfume, and starch granules and each particle has a mass between about 0.95 mg and about 5 grams.

First claim

What is claimed is:

1. A process for imparting scent to air comprising the steps of:
providing a plurality of particles in a reservoir;
heating said reservoir to melt said particles to form a melt; and
contacting said melt with air;
wherein said particles comprise:
about 40% to about 95% by weight polyethylene glycol, wherein said polyethylene glycol has a weight average molecular weight from about 5000 to about 11000;
about 0.1% to about 20% by weight perfume; and
about 0.1% to about 50% by weight starch granules, wherein said starch granules have a dextrose equivalent from 0 to about 40, wherein said starch granules have a grain size of from about 1 μm to about 500 μm, and wherein said starch granules have a starch perfume load level of said perfume on said starch granules of from 0% to about 10% by weight of said starch granules;
wherein said particles are substantially homogenously structured particles; and
wherein each of said particles has a mass between about 0.95 mg to about 5 grams.

2. The process according to claim 1 , where the step of heating said reservoir is performed with a flame or resistive heating element.

3. The process according to claim 1 , wherein said process further comprises a step of forceably moving said air in proximity to said melt.

4. The process according to claim 1 , wherein said particles are substantially free from inclusions having a size greater than about 200 μm.

5. The process according to claim 1 , wherein said starch granules have a dextrose equivalent from 0 to about 25.

6. The process according to claim 1 , wherein said starch granules are unmodified starch.

7. The process according to claim 1 , wherein said starch granules have a grain size of from about 1 μm to about 200 μm.

8. The process according to claim 1 , wherein said starch granules have a grain size of from about 1 μm to about 30 μm.

9. The process according to claim 1 , wherein said polyethylene glycol has a polyethylene glycol perfume load level of said perfume on said polyethylene glycol, wherein said polyethylene glycol perfume load level is greater than said starch perfume load level.

10. The process according to claim 1 , wherein said particles have a flat or substantially flat base.

11. The process according to claim 1 , wherein said perfume comprises unencapsulated perfume.

12. The process according to claim 1 , wherein said particles are substantially free from particulate inclusions having a size greater than about 500 μm.

13. The process according to claim 12 , wherein said starch granules have a dextrose equivalent from 0 to about 25.

14. The process according to claim 13 , wherein said starch granules have a grain size of from about 1 μm to about 200 μm.

15. The process according to claim 14 , wherein said particles further comprise dye.

16. The process according to claim 15 , wherein said polyethylene glycol has a polyethylene glycol perfume load level of said perfume on said polyethylene glycol, wherein said polyethylene glycol perfume load level is greater than said starch perfume load level.

17. The process according to claim 16 , wherein said particles have a flat or substantially flat base.

18. The process according to claim 17 , wherein said perfume comprises unencapsulated perfume.

19. A composition comprising a plurality of particles, wherein said particles comprise:
about 40% to about 80% by weight polyethylene glycol, wherein said polyethylene glycol has a weight average molecular weight from about 5000 to about 11000;
about 0.1% to about 20% by weight perfume; and
about 0.1% to about 50% by weight starch granules, wherein said starch granules have a dextrose equivalent from 0 to about 40, wherein said starch granules have a grain size of from about 1 μm to about 200 μm, and wherein said starch granules have a starch perfume load level of said perfume on said starch granules of from 0% to about 10% by weight of said starch granules;
wherein said particles are substantially homogenously structured particles;
wherein each of said particles has a mass between about 0.95 mg to about 5 grams;
wherein said particles are substantially free from particulate inclusions having a size greater than about 500 μm;
wherein said starch granules have a dextrose equivalent from 0 to about 25;
wherein said polyethylene glycol has a polyethylene glycol perfume load level of said perfume on said polyethylene glycol, wherein said polyethylene glycol perfume load level is greater than said starch perfume load level;
wherein said perfume comprises unencapsulated perfume;
wherein said particles are retained on an ASTM E11-13 number 20 sieve.

Assignees

• Procter & Gamble

Inventors

• Frentzel Lisa Grace
• Dykstra Robert Richard
• Zerhusen Jaden S
• Kozak Kathleen Marie

Classifications

• A61L9/012 Primary

  characterised by being in a special form, e.g. gels, emulsions {(A61L9/048 takes precedence)} · CPC title

• A61L9/02 Primary

  using substances evaporated in the air by heating or combustion · CPC title

• C11B9/00

  Essential oils; Perfumes · CPC title