Detergent composition in the form of a solid detergent containing surfactant and bleaching peroxide

• US 6,362,150 B1
• Filed: 11/12/1998
• Issued: 03/26/2002
• Est. Priority Date: 11/12/1998
• Status: Expired due to Fees

• Current Assignee: Corporation Cressida
• Original Assignee: Corporation Cressida
• Inventors: Lunati, Judas Omar Riera
• Primary Examiner(s): Gupta, Yogendra
• Assistant Examiner(s): Petruncio, John M
• Application Number:
  US09/189,949
• Time in Patent Office: 1,230 Days
• Field of Search: 510/150, 510/441, 510/445, 510/446, 510/447, 510/309
• US Class Current: 510/309
• CPC Class Codes: C11D 17/0069 Laundry bars
• CPC Class Codes: C11D 3/046 Salts
• CPC Class Codes: C11D 3/06 Phosphates, including polyphosphates
• CPC Class Codes: C11D 3/10 Carbonates ; Bicarbonates
• CPC Class Codes: C11D 3/33 Amino carboxylic acids
• CPC Class Codes: C11D 3/38609 Protease or amylase in solid compositions only
• CPC Class Codes: C11D 3/3942 Inorganic per-compounds C11D3/3902 takes precedence

Abstract

This invention concerns a detergent composition in solid form containing surfactant and a peroxide bleaching agent. In another preferred composition, encapsulated or non-encapsulated enzymes may be present, improving performance during washing. Other conventional additives may also optionally be present. The composition is suitable for hand washing and soaking of clothing. The process for the form relation of this composition is furthermore fundamental in order to ensure the stability of the peroxide bleaching agent and the enzyme. For this reason, low moisture materials and hydrating salts are used.

Claims

1. A solid hand laundry detergent composition, said composition comprising:

a) from 10% to 50% by weight surfactant selected from the group consisting of anionic surfactants, cationic surfactants, non-ionic surfactants, amphoteric surfactants, and mixtures thereof;

b) from 0.5% and 20% by weight peroxide bleaching agent; and

c) from 2% to 30% by weight detergency reinforcing agent; and

d) from 4% to 40% by weight alkaline salts;

wherein at least one of the detergency reinforcing agent and the alkaline salts are sufficiently hydrated to provide a solid matrix with no greater than 6% by weight free humidity in the composition.

2. The solid detergent composition of claim 1, further comprising 0.015% to 3% enzymes selected from the group consisting of protease, amylase, lipase, cellulose, peroxidase, and combinations thereof.

3. The solid detergent composition of claim 1 or claim 2 further comprising 0.05% to 10.0% by weight sequesterant selected from the group consisting of polyphosphates, carboxylates, phosphonates, and combinations thereof.

4. The composition of claim 2, wherein said enzymes comprise encapsulated enzymes.

5. The composition of claim 3, wherein said polyphosphate is selected from the group consisting of sodium tripolyphoshate, tetrasodium pyrophosphate, and combinations thereof.

6. The composition of claim 3, wherein said carboxylates are selected from the group consisting of tetraacetic diamino ethylene, pentaacetic triamino diethyl acid, and combinations thereof.

7. The composition of claim 1, wherein said peroxide bleaching agent comprises sodium perborate monohydrate.

8. The composition of claim 1, further comprising metallic silicates.

9. A method of preparing a solid hand laundry detergent composition comprising combining the following components:

(a) 4% by weight to 40% by weight anhydrous alkaline salts, based on the weight of the final composition;

(b) 2% by weight to 30% by weight anhydrous detergency reinforcing agents;

(c) water;

(d) 10% by weight to 50% by weight surfactant;

(e) 0.1% by weight to 10% by weight sequestrant; and

(f) 0.5% by weight to 20% by weight peroxide bleaching agent;

wherein sufficient water is added to hydrate the detergency reinforcing agents and the alkaline salts to provide a solid matrix with no greater than 6% by weight free humidity.

10. The method of claim 9, further comprising adding 0.1% by weight to 10% by weight of a filler.

11. The method of claim 9, further comprising adding an enzyme.

12. A solid hand laundry detergent composition, said composition comprising:

a) from 20% to 30% by weight, based on the final weight of the composition, of a surfactant selected from the group consisting of anionic surfactants, cationic surfactants, non-ionic surfactants, amphoteric surfactants, and mixtures thereof;

b) from 1% to 8% by weight monohydrate perborate; and

c) from 2% to 30% by weight phosphate salts; and

d) from 8% to 20% by weight alkaline salts;

wherein the detergency reinforcing agent and the alkaline salts are sufficiently hydrated to provide a solid matrix with no greater than 6% by weight free humidity.

13. The composition of claim 12, further comprising 0.2% to 3.0% by weight of a sequestrant.

14. The composition of claim 12, further comprising an enzyme.

15. The composition of claim 12, further comprising 0.1 to 10% of a filler.