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

Patent metadata

Field	Value
Publication number	US-9550962-B2
Application number	US-201414535345-A
Country	US
Kind code	B2
Filing date	Nov 7, 2014
Priority date	Jun 24, 2010
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

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.

First claim

What is claimed is:

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:

wherein:
a. m is an integer from about 20 to 10,000
b. each R4 is H, and R 1 , R 2 , R 3 are each independently selected from the group consisting of: H; C 1 -C 32 alkyl; C 1 -C 32 substituted alkyl, C 5 -C 32 or C 6 -C 32 aryl, C 5 -C 32 or C 6 -C 32 substituted aryl or C 6 -C 32 alkylaryl, or C 6 -C 32 substituted alkylaryl, and

wherein:
n is an integer selected from 0 to 10 and
Rx is selected from the group consisting of: R 5 ;

wherein at least one Rx in said polysaccharide has a structure selected from the group consisting of:

wherein A − is a suitable anion;
q is an integer selected from 1 to 4;
each R 5 is independently selected from the group consisting of: H; C 1 -C 32 alkyl;
C 1 -C 32 substituted alkyl, C 5 -C 32 or C 6 -C 32 aryl, C 5 -C 32 or C 6 -C 32 substituted aryl, C 6 -C 32 alkylaryl, C 6 -C 32 substituted alkylaryl, and OH;
each R 6 is independently selected from the group consisting of: H, C 1 -C 32 alkyl, C 1 -C 32 substituted alkyl, C 5 -C 32 or C 6 -C 32 aryl, C 5 -C 32 or C 6 -C 32 substituted aryl, C 6 -C 32 alkylaryl, and C 6 -C 32 substituted alkylaryl;
each T is independently selected from the group: H,

wherein each v in said polysaccharide is an integer from 1 to 10; the sum of all v indices in each Rx in said polysaccharide is an integer from 1 to 30; and in the last

 group in a chain, T is always an H.

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:

wherein:
i. m is an integer from about 20 to 10,000
ii. each R4 is H, and R 1 , R 2 , R 3 are each independently selected from the group consisting of: H; C 1 -C 32 alkyl; C 1 -C 32 substituted alkyl, C 5 -C 32 or C 6 -C 32 aryl, C 5 -C 32 or C 6 -C 32 substituted aryl or C 6 -C 32 alkylaryl, or C 6 -C 32 substituted alkylaryl, and

Assignees

• Procter & Gamble

Inventors

• Labeque Regine
• Boulaich Rajaë
• Jennewein Marc

Classifications

• C11D17/0004

  Non aqueous liquid compositions comprising insoluble particles · CPC title

• C11D3/43

  Solvents · CPC title

• C11D3/3773

  in liquid compositions · CPC title

• C11D3/227 Primary

  with nitrogen-containing groups · CPC title

• C11D3/3723

  Polyamines or polyalkyleneimines · CPC title