Solid composition comprising free and encapsulated fragrances

Patent metadata

Field	Value
Publication number	US-10836985-B2
Application number	US-201716323430-A
Country	US
Kind code	B2
Filing date	Aug 8, 2017
Priority date	Aug 9, 2016
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

A solid composition contains (a) from 30 to 65% by weight of a polyethylene glycol, (b) from 0 to 40% by weight of a C8-C22-alkyl polyalkoxylate including at least 40 alkoxylate units, (c) from 0.5 to 15% by weight of free fragrance, (d) from 0.1 to 15% by weight of encapsulated fragrance, and (e) from 1 to 35% by weight of an alkaline metal salt, alkaline earth metal salt or salt of an inorganic or C1-C6-alkyl organic acid, or mixture thereof.

First claim

The invention claimed is:

1. A solid composition comprising:
(a) from 30 to 65% by weight of a polyethylene glycol,
(b) from 1 to 40% by weight of a C 8 -C 22 -alkyl polyalkoxylate comprising at least 40 alkoxylate units,
(c) from 0.5 to 15% by weight of free fragrance,
(d) from 0.1 to 15% by weight of encapsulated fragrance, and
(e) from 1 to 35% by weight of an alkali metal salt, an alkaline earth metal salt or a salt of an inorganic or C 1 -C 6 -alkyl organic acid, or a mixture thereof.

2. The solid composition of claim 1 , wherein said polyethylene glycol has an average molecular weight from 4,000 to 100,000 mass units.

3. The solid composition of claim 1 , wherein said C 8 -C 22 -alkyl polyalkoxylate is selected from the group consisting of polyoxyethylene fatty acid esters and ethoxylate fatty alcohols.

4. The solid composition of claim 1 , wherein said free fragrance comprises at least 50% by weight of fragrance ingredients having a ClogP from 3.30 to 6.50.

5. The solid composition of claim 1 , wherein said encapsulated fragrance is contained in microcapsules which have an average particle size from 1 to 500 μm.

6. The solid composition of claim 1 , wherein said encapsulated fragrance is contained in microcapsules which are formaldehyde free.

7. The solid composition of claim 1 , wherein said alkali metal salt, alkaline earth metal salt or salt of an inorganic or C 1 -C 6 -alkyl organic acid, or mixture thereof, represents from 5 to 35% by weight of the solid composition.

8. The solid composition of claim 1 , wherein said alkali metal salt, alkaline earth metal salt or salt of an inorganic or C 1 -C 6 -alkyl organic acid is a sodium, potassium, calcium or ammonium salt of an inorganic or C 1 -C 6 -alkyl organic acid, or a mixture thereof.

9. The solid composition of claim 8 , wherein said sodium, potassium, calcium or ammonium salt of an inorganic acid is selected from sodium, potassium, calcium and ammonium salts of hydrochloric, nitric, phosphoric, sulfuric or carbonic acid.

10. The solid composition of claim 8 , wherein said sodium, potassium, calcium or ammonium salt of C 1 -C 6 -alkyl organic acid is selected from sodium, potassium, calcium and ammonium salts of acetic, propionic, lactic, citric or succinic acid.

11. The solid composition of claim 1 , wherein said solid composition is in the form of powder, flakes or pellets.

12. The solid composition of claim 1 , wherein said C 8 -C 22 -alkyl polyalkoxylate is selected from the group consisting of polyoxyethylene fatty acid esters and ethoxylate fatty alcohols comprising from 40 to 200 oxyethylene units.

13. The solid composition of claim 1 , wherein said encapsulated fragrance is contained in microcapsules which have an average particle size from 5 to 200 μm.

14. The solid composition of claim 1 , wherein said alkali metal salt, alkaline earth metal salt or salt of an inorganic or C 1 -C 6 -alkyl organic acid, or mixture thereof, represents from 10 to 35% by weight of the solid composition.

15. The solid composition of claim 1 , wherein said salt of an inorganic acid is sodium bicarbonate and/or sodium chloride.

16. The solid composition of claim 1 , wherein said salt of C 1 -C 6 -alkyl organic acid is one or more selected from the group consisting of sodium acetate, sodium citrate and sodium dihydrogen citrate.

17. The solid composition of claim 1 , wherein said solid composition is in the form of pellets.

18. A laundry product comprising the solid composition as defined in claim 1 , wherein said laundry product is selected from the group consisting of powdered laundry detergents, detergent tablets and bars, wash additives, laundry detergent liquids including light duty liquids, heavy duty liquids, concentrated liquid detergents, non or low aqueous laundry liquids, unit dose sachets, soap bars, and cleaners for woollen or dark garments.

19. A fabric softener product comprising the solid composition as defined in claim 1 , wherein said fabric softener product is a fabric softener product for post-wash treatments.

20. A household cleaner comprising the solid composition as defined in claim 1 .

21. A method of making the solid composition as defined in claim 1 , in the form of pellets, said method comprising the steps of:
(i) mixing 30-65% by weight of a polyethylene glycol(s) with 1-40% by weight of a C 8 -C 22 -alkyl polyalkoxylate comprising at least 40 alkoxylate units,
(ii) melting the mixture obtained at the end of step (i) at a temperature higher than the melting points of the polyethylene glycol(s) and the C 8 -C 22 -alkyl polyalkoxylate comprising at least 40 alkoxylate units,
(iii) adding to the mixture obtained at the end of step (ii) 0.5-15% by weight of a free fragrance, 0.1-15% by weight of an encapsulated fragrance, and 1-35% by weight of an alkali metal salt, an alkaline earth metal salt or a salt of an inorganic or C 1 -C 6 -alkyl organic salt, or a mixture thereof, in any order,
(iv) mixing the mixture obtained at the end of step (iii) to form a uniform dispersion, and
(v) either pumping the mixture obtained at the end of step (iv) through nozzles at which point the mixture is poured onto a cold surface to set as a film and cut into individual sized units, cast as individual hemispherical pellets or sprayed into cold air, to form individual spherical pellets; or alternatively cooling the mixture obtained at the end of step (iv) to obtain a soft solid mixture, and then extruding the obtained soft solid mixture through a die and cutting it into pellets.

22. A laundry product comprising the solid composition as prepared according to the method of claim 21 , wherein said laundry product is selected from the group consisting of powdered laundry detergents, detergent tablets and bars, wash additives, laundry detergent liquids including light duty liquids, heavy duty liquids, concentrated liquid detergents, non or low aqueous laundry liquids, unit dose sachets, soap bars, and cleaners for woollen or dark garments.

23. A fabric softener product comprising the solid compositions as prepared according to the method of claim 21 , wherein said fabric softener product is a fabric softener product for post-wash treatments.

24. A household cleaner comprising the solid composition as prepared according to the method of claim 21 .

Assignees

• Takasago Perfumery Co Ltd

Inventors

• Anthony Olivier
• Fraser Stuart
• Warr Jonathan
• RENOUD Barbara

Classifications

• C11D17/042 Primary

  Water soluble or water disintegrable containers or substrates containing cleaning compositions or additives for cleaning compositions · CPC title

• C11D3/3707

  Polyethers, e.g. polyalkyleneoxides · CPC title

• C11D1/72

  Ethers of polyoxyalkylene glycols · CPC title

• C11D3/50

  Perfumes · CPC title

• C11D3/046

  Salts · CPC title