Claims
- 1. A solid laundry detergent composition, comprising by weight:
- (a) from about 5% to about 20% of an organic surfactant;
- (b) from about 25% to about 60% of one or more non-phosphate detergent builder salts;
- (c) from about 3% to about 20% of a coated alkali metal percarbonate bleach wherein the coating comprises sodium silicate in an amount from about 2% to 5% by weight of the percarbonate;
- wherein the composition:
- i) has a bulk density of at least about 650 g/liter,
- ii) contains less than about 25 ppm total of Iron, Copper and Manganese ions; and
- iii) has an equilibrium relative humidity of not more than about 25% at 32.degree. C.,
- whereby the weight percentage of the original percarbonate remaining undecomposed after 28 days storage in closed wax laminate paperboard cartons at 32.degree. C. and 80% Relative Humidity is at least 60%;
- wherein the composition comprises, by weight of the composition:
- 1) from about 15% to 25% of a first multi-ingredient component comprising, by weight of the first component: (i) from about 0.75 to 40% anionic surfactant and (ii) from about 60 to 99.25% of organic or inorganic salts; and
- 2) from about 1 to 50% of a second multi-ingredient component comprising a water-soluble surfactant and at least one organic or inorganic salt;
- wherein the level of hydratable water-soluble sulfates in the composition is no more than about 1.0% the level of hydratable water-soluble sulfate which is present being in the form of a separately added ingredient;
- wherein the first multi-ingredient component comprises a spray-dried powder, and
- wherein the second multi-ingredient component comprises an agglomerate of non-spray-dried ingredients.
- 2. A composition according to claim 1 wherein the weight percentage of the original percarbonate remaining undecomposed after 28 days storage in closed wax laminated paperboard cartons at 32.degree. C. and 80% Relative Humidity is at least about 80%.
- 3. A composition according to claim 1 wherein each multi-ingredient component contains a proportion of both ingredients a) and b).
- 4. A composition according to claim 3 wherein the non-phosphate detergent builder ingredient is selected from the group consisting of alkali metal carbonates, bicarbonates, silicates, aluminosilicates, polycarboxylates, amino poly (alkylene phosphonates) and mixtures thereof.
- 5. A composition according to claim 4 wherein the non-phosphate detergent builder ingredient includes a sodium aluminosilicate zeolite of formula Na.sub.z [(AlO.sub.2).sub.z (SiO.sub.2).sub.y ]. xH.sub.2 O wherein z and y are at least 6, the ratio of z to y is from 1.0 to 0.5 and x is at least 5, said zeolite being present solely as part of a multi-ingredient component.
- 6. A composition according to claim 5, wherein said non-phosphate detergent builder comprises sodium silicate having a ratio of SiO.sub.2 to Na.sub.2 O of from 1.6 to 3.0, said sodium silicate being present in a form that is discrete relative to any sodium aluminosilicate present in the composition.
- 7. A composition according to claim 6 wherein the non-phosphate detergent builder ingredient comprises a mixture of hydrated sodium zeolite A, sodium silicate, tri-sodium citrate dihydrate and sodium carbonate.
- 8. A composition according to claim 7 wherein the sodium silicate is a solid at ambient temperatures and is present as a discrete particulate.
- 9. A composition according to claim 8 wherein the sodium silicate is a crystalline layered silicate of formula NaMSi.sub.x O.sub.2x+1. yH.sub.2 O wherein M is sodium or hydrogen, x is a number from 1.9 to 4 and y is a number from 0 to 20.
- 10. A composition according to claim 9 wherein M is Na, x is z and y is 0.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9021761 |
Oct 1991 |
GBX |
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Parent Case Info
This is a continuation of application Ser. No. 08/002,509, filed on Jan. 4, 1993, which is in turn a continuation of application Ser. No. 07/771,930, filed on Oct. 7, 1991, and now abandoned.
US Referenced Citations (7)
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Continuations (2)
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Number |
Date |
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Parent |
2509 |
Jan 1993 |
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Parent |
771930 |
Oct 1991 |
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