Phyllosilicate adsorbate and its use
View Patent ↗The invention provides an adsorbate which comprises a soluble zinc compound of a polycarboxylic acid adsorbed on crystalline alkali metal phyllosilicate, and the use thereof.
1. An adsorbate consisting of a soluble zinc compound of a polycarboxylic acid and a crystalline alkali metal phyllosillcate, wherein the soluble zinc compound of a polycarboxylic acid is adsorbed on the crystalline alkali metal phyllosilicate.
2. The adsorbate as claimed in claim 1 , wherein said adsorbate consists of from 50 to 99% by weight of the crystalline alkali metal phyllosilicate, from 0.1 to 40% by weight of polycarboxylic acid and from 0.1 to 20% by weight of zinc, calculated as the element.
3. The adsorbate as claimed in claim 1 , wherein said adsorbate consists of from 60 to 95% by weight of crystalline alkali metal phyllosilicate, from 10 to 30% by weight of polycarboxylic acid and from 0.1 to 10% by weight of zinc, calculated as the element.
4. The adsorbate as claimed in claim 1 , wherein the polycarboxylic acid consists of from 10 to 70% by weight of maleic acid, from 20 to 85% by weight of acrylic acid, from 0 to 10% by weight of vinyl acetate and from 0 to 10% by weight of further monomers, with a degree of neutralization of from 0 to 70%.
5. The adsorbate as claimed in claim 1 , wherein the polycarboxylic acid consists of homopolymers and/or copolymers selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, polyaspartic acid, sugar carboxylic acid and mixtures thereof, wherein the homopolymers and/or copolymers are non-neutralized or only partly neutralized.
6. The adsorbate as claimed in claim 1 , wherein the polycarboxylic acid has an average molar mass of from 1000 to 100 000 g/mol.
7. The adsorbate as claimed in claim 1 , wherein the polycarboxylic acid has a degree of neutralization of the acid groups of from 1 to 100%.
8. The adsorbate as claimed in claim 1 , having a pH of from 8 to 10 at 2° C. after 10 mm in 0.1% aqueous dispersion.
9. The adsorbate as claimed in claim 1 , having a bulk density of between 400 and 800 g/l.
10. The adsorbate as claimed in claim 1 , having a Hunter whiteness of from 80 to 100.
11. The adsorbate as claimed in claim 1 , having a Hunter a value of from −1.5 to +1.5.
12. The adsorbate as claimed in claim 1 , having a Hunter b value of from 0 to +2.
13. The adsotate as claimed in claim 1 , having a release rate of from 0.0001 to 12 g zinc*l −1 *h −1 .
14. A process for preparing an adsorbate as claimed in claim 1 , comprising the steps agglomerating a solution of the soluble zinc compound of a polycarboxylic acid with crystalline alkali metal phyllosilicate in a granule-building mixer to form an agglomerate and dying the agglomerate.
15. The process as claimed in claim 14 , wherein agglomeration step is carried out at from 0 to 200° C. under a pressure of from 0.1 to 100bar for a time of from 0.01 h to 1 h.
16. A process for preparing an adsorbate as claimed in claim 1 , comprising the steps of adsorbing the soluble zinc compound of a polycarboxylic acid onto the crystalline alkali metal phyllbsilicate by roll compacting to form a compacted composition, grinding the compacted composition and classifying the compacted composition.
17. A process for preparing an adsorbate as claimed claim 1 , comprising the step of adsorbing the soluble zinc compound of a polycarboxylic acid onto the crystalline alkali metal phyllosilicate by fluid-bed size-enlargement granulation.
18. A process for releasing a soluble zinc compound into a detergent solution comprising the steps of agglomerating a soluble zinc compound of a polycarboxylic acid with an alkali metal phyllosilicate to form the adsorbate of claim 1 , mixing the adsorbate with a detergent to form a mixture and dissolving the mixture in mains water or deionized water.
19. A detergent comprising an adsorbate as claimed in claim 1 .
20. A detergent comprising:
from 10 to 90% by weight of at least one builder and at least one cobuilder;
from 10 to 90% by weight of at least one pH regulator;
from 0.1 to 20% by weight of bleach;
from 0 to 10% by weight of at least one surface-active substance; and
from 0.01 to 10% by weight of the adsorbate as claimed in claim 1 .
21. The detergent as claimed in claim 20 , comprising:
from 20 to 50% by weight of at least one builder and at least one cobuilder;
from 10 to 50% by weight of at least one pH regulator;
from 1 to 20% by weight of bleach;
from 0 to 10% by weight of at least one surface-active substance; and
from 0.1 to 10% by weight of the adsorbate as claimed in claim 1 .
22. A detergent comprising:
from 10 to 90% by weight of at least one builder and at least one cobuilder;
from 1 to 9% by weight of at least one pH regulator;
from 0.1 to 50% by weight of at least one surface-active substance;
from 1 to 10% by weight of bleach; and
from 0.1 to 10% by weight of the adsorbate as claimed in claim 1 .
23. A detergent comprising:
from 10 to 90% by weight of at least one builder and at least one cobuilder;
from 1 to 9% by weight of at least one pH regulator;
from 0.1 to 50% by weight of at least one surface-active substance; and
from 0.1 to 10% by weight of the adsorbate as claimed in claim 1 .
24. The adsorbate as claimed in claim 1 , wherein the polycarboxylic acid has an average molar mass of from 2000 to 70 000 g/mol.
25. The adsorbate as claimed in claim 1 , wherein the polycarboxylic acid has an average molar mass of from 2000 to 35 000 g/mol.
26. The adsorbate as claimed in claim 1 , wherein the polycarboxylic acid has a degree of neutralization of the acid groups of from 10 to 90%.
27. The adsorbate as claimed in claim 1 , wherein the polycarboxylic acid has a degree of neutralization of the acid groups of from 30 to 70%.
28. The adsorbate as claimed in claim 1 , having a pH of from 10 to 12 at 2° C. after 10 min in 0.1% aqueous dispersion.
29. The adsorbate as claimed in claim 1 , having a bulk density of between 400 and 700 g/l.
30. The adsorbate as claimed in claim 1 , having a Hunter whiteness of from 85 to 95.
31. The adsorbate as claimed in claim 1 , having a Hunter a value of from from −0.8 to 0.
32. The adsorbate as claimed in claim 1 , having a Hunter b value of from 0.2 to 1.5.
33. The adsorbate as claimed in claim 1 , having a release rate of from 0.0002 to 2.4 g zinc*l −1 *h −1 .
34. The detergent as claimed in claim 19 , wherein the detergent is a laundry detergent.
35. The detergent as claimed in claim 20 , wherein the detergent is a laundry detergent.
36. The detergent as claimed in claim 22 , wherein the detergent is a laundry detergent.
37. The detergent as claimed in claim 23 , wherein the detergent is a laundry detergent.
38. The adsorbate as claimed in claim 2 , wherein the adsorbate consists of from 0.6 to 6% by weight of zinc, calculated as the element.