Stable non-aqueous liquid compositions comprising a cationic polymer in particulate form

• US 9,550,962 B2
• Filed: 11/07/2014
• Issued: 01/24/2017
• Est. Priority Date: 06/24/2010
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Boulaich, Raja, Labeque, Regine, Jennewein, Marc
• Primary Examiner(s): HARDEE, JOHN R
• Application Number:
  US14/535,345
• Publication Number:
  US 20150065411A1
• Time in Patent Office: 809 Days
• US Class Current: 1/1
• CPC Class Codes: C11D 1/008 Polymeric surface-active agents
• CPC Class Codes: C11D 17/0004 Non aqueous liquid compositions comprising insoluble particles
• CPC Class Codes: C11D 17/043 Liquid or thixotropic (gel) compositions
• CPC Class Codes: C11D 3/0015 liquid
• CPC Class Codes: C11D 3/227 with nitrogen-containing groups
• CPC Class Codes: C11D 3/3707 Polyethers, e.g. polyalkyleneoxides
• CPC Class Codes: C11D 3/3723 Polyamines or polyalkyleneimines
• CPC Class Codes: C11D 3/3773 in liquid compositions
• CPC Class Codes: C11D 3/43 Solvents

Abstract

The need for a stable, compact composition providing improved fabric care benefit, that is also convenient to use, can be met by incorporating a cationic cellulose polymer into a non-aqueous composition, using a non-aqueous dispersant. Such compositions have good physical stability, with little or no clumping of the cationic polymer in particulate form.

Claims

1. A non-aqueous liquid composition comprising:

a) a cationic polymer in particulate form, wherein the cationic polymer in particulate form has an area average D90 diameter of less than about 300 microns, and wherein the cationic polymer is a cationic polysaccharide; and

b) a non-aqueous dispersant; and

c) less than 15% by weight of water;

wherein the cationic polymer is stably dispersed in the non-aqueous liquid composition, and wherein the non-aqueous liquid composition is enclosed in a water-soluble or dispersible film.

2. The non-aqueous liquid composition according to claim 1, wherein the cationic polymer in particulate form is partially hydrated and/or solvated.

3. The non-aqueous liquid composition according to claim 1, wherein the cationic polymer in particulate form has an area average D90 diameter of less than about 200 microns.

4. The non-aqueous liquid composition according to claim 1, wherein the cationic polysaccharide is a cationic cellulose having the structural formula I:

5. The non-aqueous liquid composition according to claim 1, comprising from about 0.01% to about 20% by weight of the cationic polymer in particulate form.

6. The non-aqueous liquid composition according to claim 1, comprising from about 0.01% to about 20% by weight of the cationic polymer in particulate form.

7. The non-aqueous liquid composition according to claim 1, comprising from about 0.05% to about 98% by weight of the non-aqueous dispersant.

8. The non-aqueous liquid composition according to claim 1, wherein the non-aqueous dispersant has a Hansen parameter of from about 23 to about 36.

9. The non-aqueous liquid composition according to claim 1, wherein the non-aqueous dispersant is an alcohol or polyol selected from the group consisting of:

ethanol, glycerol, polyethylene glycol of molecular weight from about 100 to about 400.

10. The non-aqueous liquid composition according to claim 1, wherein the composition further comprises from about 0.1% to about 30% by weight of spacer particles.

11. The non-aqueous liquid composition according to claim 10, wherein the spacer particles have an area average D90 diameter of less than about 5 microns.

12. The non-aqueous liquid composition according to claim 1, wherein the composition further comprises alkyltrimethylammonium salts, polyvalent anions, or mixtures thereof.

13. The non-aqueous liquid composition according to claim 12, wherein the composition comprises an alkyltrimethylammonium salt selected from the group consisting of:

such as C12 alkyltrimethylammonium chloride, or their hydroxyalkyl substituted analogues.

14. The non-aqueous liquid composition according to claim 12, wherein the composition comprises polyvalent anions, selected from the group consisting of:

Citric Acid;

Diethylene triamine pentaacetic acid (DTPA);

1-hydroxyethane 1,1-diphosphonic acid (HEDP);

Maleic acid;

Polyacrylates;

Polyacrylic/maleic acid copolymers;

succinic acid, and mixtures thereof.

15. The non-aqueous liquid composition according to claim 1, wherein the composition further comprises from about 0.01% to about 10% by weight of an external structuring system.

16. A non-aqueous liquid composition according to claim 15, wherein the external structuring system comprises non-polymeric crystalline hydroxy-functional structurants.

17. A non-aqueous liquid composition according to claim 15, wherein the external structuring system comprises polymeric structurants.

18. The non-aqueous liquid composition according to claim 1, wherein the water-soluble or dispersible film comprises resins selected from the group consisting of:

polyvinyl alcohols, polyvinyl alcohol copolymers, hydroxypropyl methyl cellulose (HPMC), and mixtures thereof.

19. A non-aqueous liquid composition according to claim 1, wherein the composition further comprises from 1% to 70% by weight of one or more anionic surfactants.

20. A process for preparing the non-aqueous liquid composition of claim 1, characterized in that the process comprises the steps of:

a. providing a cationic polymer dispersion by combining the cationic polymer with the dispersant; and

b. combining the cationic polymer dispersion with a non-aqueous liquid feed.

21. A non-aqueous liquid composition comprising:

a. a cationic polysaccharide in particulate form, wherein the cationic polysaccharide in particulate form has an area average D90 diameter of less than about 300 microns; and

b. a non-aqueous dispersant; and

c. less than 15% by weight of water;

d. from 1% to 70% by weight of one or more anionic surfactants;

wherein the cationic polysaccharide is stably dispersed in the non-aqueous liquid composition and further wherein the cationic polysaccharide is a cationic cellulose having the structural formula I;