Laundry detergent particle

Patent metadata

Field	Value
Publication number	US-9284517-B2
Application number	US-201113878448-A
Country	US
Kind code	B2
Filing date	Sep 1, 2011
Priority date	Oct 14, 2010
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

The present invention provides a coated lenticular or disc detergent particle having perpendicular dimensions x, y and z, wherein x is from 1 to 2 mm, y is from 2 to 8 mm and z is from 2 to 8 mm, wherein the particle comprises: (i) from 40 to 90 wt % surfactant selected from anionic surfactant and non-ionic surfactant; (ii) from 1 to 40 wt % water soluble inorganic salts; and (iii) from 0.0001 to 0.1 wt % pigment, wherein the pigment is selected from organic and inorganic pigments, wherein the inorganic salts are present on the detergent particle as a coating and the surfactant and the pigment are present as a core.

First claim

We claim:

1. A coated detergent particle consisting of:
a core consisting of surfactant, pigment, and optionally, at least one of soap, water, fluorescent agent, perfume, carboxymethylcellulose, polyethylene glycol, polyvinyl alcohol, polyethylene imine, ethoxylated polyethylene imine, water soluble polyester polymer, polycarboxylate, polyacrylate, maleic/acrylic acid copolymer, lauryl methacrylate/acrylic acid copolymer, enzyme, or enzyme stabilizer;
and
a coating consisting of water soluble inorganic salts and optionally, at least one of water, fluorescent agent, perfume, carboxymethylcellulose, polyethylene glycol, polyvinyl alcohol, polyethylene imine, ethoxylated polyethylene imine, water soluble polyester polymer, polycarboxylate, polyacrylate, maleic/acrylic acid copolymer, lauryl methacrylate/acrylic acid copolymer, enzyme, or enzyme stabilizer;

wherein from 40 to 90 wt % of the coated detergent particle is the surfactant;
wherein the surfactant is selected from anionic surfactant, non-ionic surfactant, and combinations thereof;
wherein from 1 to 40 wt % of the coated detergent particle is the water soluble inorganic salts;
wherein from 0.0001 to 0.1 wt % of the coated detergent particle is the pigment;
wherein the pigment is selected from organic pigments, inorganic pigments, and combinations thereof;
wherein each coated particle has perpendicular dimensions x, y and z;
wherein x is from 1 to 2 mm, y is from 2 to 8 mm, and z is from 2 to 8 mm; and
wherein x is not equal to y and z.

2. A coated detergent particle according to claim 1 , wherein the pigment is selected from organic pigments.

3. A coated detergent particle according to claim 1 , wherein the pigment is selected from: monoazo pigments; beta-naphthol pigments; naphthol anilid satire pigments; azo pigment lakes; benzimidazolone pigments; metal complex pigments; isoindolinone and isoindoline pigments; phthalocyanine pigments; quinacridone pigments; perylene pigments; perinone pigments; diketopyrrolo-pyrrole pigments; thioindigo pigments; anthraquinone pigments; anthrapyrimidine pigments; flavanthrone pigments; anthanthrone pigments; dioxazine pigments; and, quinophthalone pigments.

4. A coated detergent particle according to claim 3 , wherein the pigment is selected from: pigment green 8; pigment blue 28; pigment yellow 1; pigment yellow 3; pigment orange 1; pigment red 4; pigment red 3; pigment red 22; pigment red 112; pigment red 7; pigment brown 1; pigment red 5; pigment red 68; pigment red 51; pigment red 53; pigment red 53:1; pigment red 49; pigment red 49:1; pigment red 49:2; pigment red 49:3; pigment red 64:1; pigment red 57; pigment red 57:1; pigment red 48; pigment red 63:1; pigment yellow 16; pigment yellow 12; pigment yellow 13; pigment yellow 83; pigment orange 13; pigment violet 23; pigment red 83; pigment blue 60; pigment blue 64; pigment orange 43; pigment blue 66; pigment blue 63; pigment violet 36; pigment violet 19; pigment red 122; pigment blue 16; pigment blue 15; pigment blue 15:1; pigment blue 15:2; pigment blue 15:3; pigment blue 15:4; pigment blue 15:6; pigment green 7; pigment green 36; pigment blue 29; pigment green 24; pigment red 101:1; pigment green 17; pigment green 18; pigment green 14; pigment brown 6; pigment blue 27; and, pigment violet 16.

5. A coated detergent particle according to claim 1 , wherein the pigment has a primary particle size of 0.02 to 10 μm.

6. A coated detergent particle according to claim 1 , wherein the inorganic salt is sodium carbonate.

7. A coated detergent particle according to claim 1 , wherein the surfactant consists of:
from 15 to 85 wt % on total surfactant of the anionic surfactant and
from 5 to 75 wt % on total surfactant of the non-ionic surfactant.

8. A coated detergent particle according to claim 1 , wherein the anionic surfactant is present in an amount from 15 to 100 wt % based on total surfactant of which 20 to 30 wt % is sodium lauryl ether sulphate.

9. A coated detergent particle according to claim 1 , wherein the anionic surfactant is selected from alkyl benzene sulphonates; alkyl ether sulphates; alkyl sulphates.

10. A coated detergent particle according to claim 9 , wherein the anionic surfactant is selected from sodium lauryl ether sulfate with 1 to 3 ethoxy groups, sodium C 10 to C 15 alkyl benzene sulphonates and sodium C 12 to C 18 alkyl sulphates.

11. A coated detergent particle according to claim 1 , wherein the non-ionic surfactant is a 10 to 50 EO non-ionic surfactant.

12. A coated detergent particle according to claim 11 , wherein the non-ionic surfactant is the condensation products of aliphatic C 8 to C 18 primary or secondary linear or branched alcohols with 20 to 35 ethylene oxide groups.

13. A coated detergent particle according to claim 1 , wherein from 20 to 40 wt % of the coated detergent particle is the water soluble inorganic salts.

14. A coated detergent particle according to claim 13 , wherein from 25 to 35 wt % of the coated detergent particle is the water soluble inorganic salts.

15. A coated detergent particle according to claim 1 , wherein the water is present in the coated detergent particle in an amount from 1 to 15 wt %.

16. A coated detergent particle according to claim 1 , wherein the water is present in the coated detergent particle in an amount from 1 to 5 wt %.

17. A plurality of coated detergent particles according to claim 1 , wherein at least 90 to 100% of the coated detergent particles in the x, y and z dimensions are within a 20% variable from the largest to the smallest coated detergent particle.

Assignees

• Batchelor Stephen Norman
• Chapple Andrew Paul
• Keningley Stephen Thomas
• Conopco Inc

Inventors

• Batchelor Stephen Norman
• Chapple Andrew Paul
• Keningley Stephen Thomas

Classifications

• C11D3/046

  Salts · CPC title

• C11D3/10

  Carbonates {; Bicarbonates} · CPC title

• C11D3/08

  Silicates · CPC title

• C11D17/0039

  Coated compositions or coated components in the compositions, (micro)capsules · CPC title

• C11D3/40 Primary

  Dyes {; Pigments} · CPC title