Granular composition
View Patent ↗In order to improve the dispersion of nonionic surfactant into wash water from a granule in which the nonionic surfactant is carried on a water-insoluble granular material, the nonionic surfactant is intimately mixed with a structurant which is a non-soap ionic surfactant in finely divided particulate form. A preferred structurant is an anionic surfactant, for example, primary alcohol sulphate.
1. A nonionic-surfactant-containing granular composition, comprising:
(a) a structured surfactant blend, and
(b) a granular carrier material,
wherein the structured surfactant blend (a) comprises (a)(i) a nonionic surfactant in intimate admixture with (a)(ii) a structurant which is a fine particulate non-soap ionic surfactant having a d 50 particle size within the range of from 1 to 50 micrometres, the weight ratio of (a)(i) to (a)(ii) being within the range of from 20:1 to 1:1.
2. A composition as claimed in claim 1 , wherein the weight ratio of (a)(i) to (a)(ii) is within the range of from 10:1 to 1:1.
3. A composition as claimed in claim 1 , which comprises:
(a) from 5 to 60 wt%, preferably from 15 to 50 wt%, of the structured surfactant blend, and
(b) from 40 to 95 wt%, preferably from 50 to 80 wt%, of the granular carrier material.
4. A composition as claimed in claim 1 , wherein the structurant comprises a non-soap anionic surfactant.
5. A composition as claimed in claim 4 , wherein the structurant comprises a primary alcohol sulphate.
6. A composition as claimed in claim 4 , wherein the structurant comprises a fatty acid ester sulphonate.
7. A composition as claimed in claim 1 , wherein the granular carrier material is substantially or completely water-insoluble.
8. A composition as claimed in claim 1 , wherein the granular carrier material is selected from alkali metal aluminosilicates, silicas, silicates, clays, and calcite.
9. A composition as claimed in claim 8 , wherein the granular carrier material comprises a crystalline alkali metal aluminosilicate selected from zeolite A, zeolit MAP, and mixtures thereof.
10. A composition as claimed in claim 8 , wherein the granular carrier material comprises at least 76 wt%, preferably at least 80 wt%, alkali metal aluminosilicate.
11. A composition as claimed in claim 8 , wherein the granular carrier material consists essentially of alkali metal aluminosilicate.
12. A composition as claimed in claim 1 , wherein the nonionic surfactant is in the form of a liquid, viscous liquid or waxy material at ambient temperature.
13. A composition as claimed in claim 1 , wherein the nonionic surfactant is an ethoxylated alcohol.
14. A composition as claimed in claim 13 , wherein the nonionic surfactant comprises a C 8 -C 20 primary or secondary aliphatic alcohol ethoxylated with an average of from 1 to 20 moles of ethylene oxide per mole of alcohol.
15. A process for manufacturing a nonionic-surfactant-containing granular composition as claimed claim 1 , which process comprises:
(i) blending the nonionic surfactant with the structurant, which is a fine particulate non-soap ionic surfactant, to produce the structured surfactant blend, followed by
(ii) mixing the structured surfactant blend with the granular carrier material.
16. A process as claimed in claim 15 , wherein the granular carrier material is produced by spray-drying an aqueous slurry.
17. A process as claimed in claim 15 , wherein the granular carrier material is prepared by granulation in a high speed mixer/granulator.
18. A process as claimed in claim 15 , wherein step (ii) is carried out in a high speed mixer/granulator.
19. A particulate laundry detergent composition comprising from 5 to 60 wt% of surfactant, from 10 to 80 wt% of detergency builder and optionally other detergent ingredients, the composition being in the form of at least two particulate or granular components of which at least one is a nonionic-surfactant-containing granular composition as claimed in claim 1 .