Claims
- 1. A detergent composition comprising 0.5% to 50% by weight of a surfactant system, 20% to 80% by weight of a detergency builder system, and optionally other conventional components; the detergency builder system comprising, in an amount of 5% to 80% by weight of the detergent composition, an alkali metal aluminosilicate of the zeolite P type having a silicon to aluminum ratio not greater than 1.33, the aluminosilicate a particle size d.sub.50 within the range of from 0.1 to 5.0 micrometers and having a calcium binding capacity of at least 150 mg CaO per g of anhydrous aluminosilicate, said calcium binding capacity being determined by dispersing the aluminosilicate in a liter of an aqueous solution containing 0.594 g of CaCl.sub.2 and adjusted to a pH of 10 with dilute NaOH, stirring the resulting suspension at 22+2.degree. C. for 15 minutes, filtering off the aluminosilicate, determining the residual hardness x in mg CaO/liter of the filtrate using a calcium electrode and calculating the calcium binding capacity from the formula:
- Calcium binding capacity equals 300-x.
- 2. A detergent composition as claimed in claim 1, wherein the detergency builder system comprises an alkali metal aluminosilicate of the zeolite P type having a silicon to aluminium ratio within the range of from 0.9 to 1.33.
- 3. A detergent composition as claimed in claim 2, wherein the detergency builder system comprises an alkali metal aluminosilicate of the zeolite P type having a silicon to aluminium ratio within the range of from 0.9 to 1.2.
- 4. A detergent composition as claimed in claim 3, wherein the detergency builder system comprises an alkali metal aluminosilicate of the zeolite P type having a silicon to aluminium ratio not greater than 1.15.
- 5. A detergent composition as claimed in claim 4, wherein the detergency builder system comprises an alkali metal aluminosilicate of the zeolite P type having a silicon to aluminium ratio within the range of from 0.9 to 1.15.
- 6. A detergent composition as claimed in claim 1, wherein the aluminosilicate is in sodium salt form.
- 7. A detergent composition as claimed in claim 1, wherein the aluminosilicate has a calcium binding capacity of at least 160 mg CaO per g of anhydrous aluminosilicate.
- 8. A detergent composition as claimed in claim 1, wherein the aluminosilicate has a particle size d.sub.50 within the range of from 0.1 to 1.0 micrometers.
- 9. A detergent composition as claimed in claim 8, wherein the aluminosilicate has a particle size d.sub.80 below 1 micrometer.
- 10. A detergent composition as claimed in claim 9, wherein the aluminosilicate has a particle size d.sub.90 below 3 micrometers.
- 11. A detergent composition as claimed in claims 8, which is in liquid form.
- 12. A detergent composition as claimed in claim 1, which contains from 20 to 80% by weight of the detergency builder system.
- 13. A detergent composition as claimed in claim 9, which contains from 5 to 80% by weight of the alkali metal aluminosilicate.
Priority Claims (2)
Number |
Date |
Country |
Kind |
8825783 |
Nov 1988 |
GBX |
|
8910029 |
May 1989 |
GBX |
|
Parent Case Info
This is a continuation of application Ser. No. 07/430,988, filed on Nov. 3, 1989, which was abandoned upon the filing hereof.
US Referenced Citations (8)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0021491 |
Jan 1981 |
EPX |
0257700 |
Mar 1988 |
EPX |
2849898 |
Nov 1978 |
DEX |
Non-Patent Literature Citations (1)
Entry |
W. C. Beard: "Molecular Sieve Zeolites-I, Advances in Chemistry Series 101", pp. 237-249 (1971). |
Continuations (1)
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Number |
Date |
Country |
Parent |
430988 |
Nov 1989 |
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