Laundry detergent composition comprising a highly water-soluble carboxymethyl cellulose particle

• US 8,193,143 B2
• Filed: 09/01/2010
• Issued: 06/05/2012
• Est. Priority Date: 09/08/2009
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Lant, Neil Joseph
• Primary Examiner(s): Eashoo, Mark
• Assistant Examiner(s): Stanley, Jane L
• Application Number:
  US12/873,673
• Publication Number:
  US 20110034365A1
• Time in Patent Office: 643 Days
• Field of Search: 510/298, 510/320, 510/349, 510/276, 510/446, 510/510, 510/451, 510/528, 510/530, 510/438
• US Class Current: 510/438
• CPC Class Codes: C11D 3/225 etherified, e.g. CMC
• CPC Class Codes: C11D 3/226 esterified

Abstract

A solid laundry detergent composition having: (a) detersive surfactant; and (b) from 0.05 wt % to 20 wt % carboxymethyl cellulose particle, wherein the carboxymethyl cellulose particle: (i) from 70 wt % to 98 wt % carboxymethyl cellulose having an average degree of carboxymethyl substitution of from 0.6 to 0.9; (ii) from 2 wt % to 12 wt % water; (iii) optionally from 0 wt % to 4 wt % sodium glycolate; and (iv) optionally from 0 wt % to 4 wt % sodium chloride.

Claims

1. A solid laundry detergent composition comprising:

(a) detersive surfactant; and

(b) from about 0.05 wt % to about 20 wt % carboxymethyl cellulose particle, wherein the carboxymethyl cellulose particle comprises;

(i) from about 70 wt % to about 98 wt % carboxymethyl cellulose having an average degree of carboxymethyl substitution of from 0.6 to 0.9;

(ii) from about 2 wt % to about 12 wt % water;

(iii) optionally from about 0 wt % to about 4 wt % sodium glycolate; and

(iv) optionally from about 0 wt % to about 4 wt % sodium chloride;

wherein the carboxymethyl cellulose has a bimodal molecular weight distribution, wherein the first molecular weight modal has a peak in the range of from about 10,000 Da to below about 100,000 Da, and wherein the second molecular weight modal has a peak in the range of from about 100,000 Da to about 300,000 Da.

2. A composition according to claim 1, wherein the carboxymethyl cellulose particle has a particle size distribution such that:

(a) at least about 90 wt % of the particles have a particle size of above about 75 micrometers; and

(b) less than about 15 wt % of particles have a particle size of above about 1000 micrometers.

3. A composition according to claim 1, wherein the carboxymethyl cellulose is a hydrophobically modified carboxymethyl cellulose, being further substituted with a hydrophobic moiety R_c and/or R_d, and having a structure according to the following formula:

4. A composition according to claim 3, wherein the average degree of hydrophobic moiety substitution is in the range of from about 0.001 to about 0.2.

5. A composition according to claim 1, wherein the composition further comprises fabric hueing dye.

6. A composition according to claim 5, wherein the fabric hueing dye is cotton-substantive.

7. A composition according to claim 1, wherein the composition further comprises:

(a) from about 0 wt % to about 10 wt % zeolite builder; and

(b) from about 0 wt % to about 10 wt % phosphate builder.

8. A composition according to claim 1, wherein the composition is in free-flowing particulate form.

9. A composition according to claim 1, wherein the carboxymethyl cellulose particle is in non-spray dried form.

10. A composition according to claim 1, wherein the carboxymethyl cellulose particle is in agglomerate form.

11. A composition according to claim 1, wherein the carboxymethyl cellulose has a degree of blockiness such that the sum of said average degree of carboxymethyl substitution and said degree of blockiness is at least about 1.00.

12. A composition according to claim 1, wherein the carboxymethyl cellulose has a degree of blockiness such that the sum of said degree of blockiness plus 2 times said average degree of carboxymethyl substitution minus said average degree of carboxymethyl substitution squared is at least about 1.20.

13. A composition according to claim 1, wherein the composition further comprises cellulase.

14. A composition according to claims 1, wherein the composition is in the form of a detergent sheet.