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 blended with a water-insoluble liquid. Preferred water-insoluble liquids include hydrocarbons, for example, paraffins.
1. A nonionic-surfactant-containing granular composition, comprising:
(a) from 5 to 60 wt % of an intimate blend consisting essentially of
(i) a nonionic surfactant, and
(ii) a water-insoluble liquid selected from paraffin wax, aromatic solvents, halogenated solvents, heterocyclic solvents, terpenes, and mineral oils,
wherein the weight ratio of the nonionic surfactant (i) to the water-insoluble liquid (ii) is within the range of from 5:1 to 1:2, and
(b) from 40 to 95 wt % of a granular carrier material.
2. A composition as claimed in claim 1 , wherein the weight ratio of (a)(i) to (a)(ii) is within the range of from 4:1 to 1:1.
3. A composition as claimed in claim 1 , wherein the composition comprises from 20 to 50 wt % of the intimate blend (a), and from 50 to 80 wt % of the granular carrier material (b).
4. A granular composition as claimed in claim 1 , wherein the water-insoluble liquid (a)(ii) is a mineral oil.
5. A granular composition as claimed in claim 1 , wherein the paraffin wax is selected from linear chain paraffins, branched chain paraffins and mixtures thereof.
6. A composition as claimed in claim 1 , wherein the granular carrier material (b) is substantially or completely water-insoluble.
7. A composition as claimed in claim 1 , wherein the granular carrier material (b) is selected from alkali metal aluminosilicates, silicas, silicates, clays and calcite.
8. A composition as claimed in claim 7 , wherein the granular carrier material comprises a crystalline alkali metal aluminosilicate selected from zeolite A, zeolite MAP and mixtures thereof.
9. A composition as claimed in claim 7 , wherein the granular carrier material comprises at least 76 wt %, preferably at least 80 wt %, of alkali metal aluminosilicate.
10. A composition as claimed in claim 7 , wherein the granular carrier material consists essentially of alkali metal aluminosilicate.
11. A composition as claimed in claim 1 , wherein the nonionic surfactant (a)(i) is in the form of a liquid, viscous liquid or waxy material at ambient temperature.
12. A composition as claimed in claim 1 , wherein the nonionic surfactant (a)(i) is an ethoxylated alcohol.
13. A composition as claimed in claim 12 , wherein the nonionic surfactant comprises a C 8 -C 20 primary and secondary aliphatic alcohol ethoxylated with an average of from 1 to 20 moles of ethylene oxide per mole of alcohol.
14. A process for manufacturing a nonionic-surfactant-containing granular composition as claimed in claim 1 , which process comprises:
(i) blending a nonionic surfactant with the water-insoluble liquid selected from paraffin wax aromatic solvents, halogenated solvents, heterocyclic solvents, terpenes, and mineral oils to produce the intimate blend, followed by
(ii) mixing the intimate blend with the granular carrier material.
15. A process as claimed in claim 14 , wherein the granular carrier material is produced by spray-drying an aqueous slurry of carrier material components.
16. A process as claimed in claim 14 , wherein the granular carrier material is prepared by granulating carrier material in a high speed mixer/granulator.
17. A process as claimed in claim 14 , wherein step (ii) is carried out in a high speed mixer/granulator.
18. 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 .
19. A nonionic-surfactant-containing granular composition, comprising:
(a) from 5 to 60 wt % of an intimate blend consisting essentially of
(i) a nonionic surfactant, and
(ii) a water-insoluble liquid comprising a silicone oil,
wherein the weight ratio of the nonionic surfactant (i) to the water-insoluble liquid (ii) is within the range of from 5:1 to 1:2, and
(b) from 40 to 95 wt % of a granular carrier material.
20. A composition as claimed in claim 19 , wherein the granular carrier material (b) is substantially or completely water-insoluble.
21. A composition as claimed in claim 19 , wherein the granular carrier material (b) is selected from alkali metal aluminosilicates, silicas, silicates, clays and calcite.
22. A composition as claimed in claim 21 wherein the granular carrier material comprises a crystalline alkali metal aluminosilicate selected from zeolite A, zeolite MAP and mixtures thereof.
23. A composition as claimed in claim 21 , wherein the granular carrier material comprises at least 76 wt %, preferably at least 80 wt %, of alkali metal aluminosilicate.
24. A composition as claimed in claim 21 , wherein the granular carrier material consists essentially of alkali metal aluminosilicate.
25. A process for manufacturing a nonionic-surfactant-containing granular composition as claimed in claim 19 , which process comprises:
(i) blending a nonionic surfactant with the water-insoluble liquid which is a silicone oil to produce the intimate blend, followed by
(ii) mixing the intimate blend with the granular carrier material.
26. A process as claimed in claim 25 , wherein the granular carrier material is produced by spray-drying an aqueous slurry of carrier material components.
27. A process as claimed in claim 25 , wherein the granular carrier material is prepared by granulating carrier material in a high speed mixer/granulator.
28. A process as claimed in claim 25 , wherein step (ii) is carried out in a high speed mixer/granulator.