Fluidized polymer suspensions of cationic polysaccharides in polyols and use thereof in personal care compositions

• US 6,093,769 A
• Filed: 11/19/1997
• Issued: 07/25/2000
• Est. Priority Date: 11/19/1997
• Status: Expired due to Term

• Current Assignee: Hercules, LLC (Ashland Global Holdings, Inc.)
• Original Assignee: Hercules Incorporated (Ashland Global Holdings, Inc.)
• Inventors: Melbouci, Mohand, Burdick, Charles Lee, Hofman, Hans, deBruin, Jacobus Johannes
• Primary Examiner(s): Kulkosky, Peter F.
• Application Number:
  US08/974,189
• Time in Patent Office: 979 Days
• Field of Search: 514/781, 424/78.02, 424/78.03
• US Class Current: 524/767
• CPC Class Codes: A61K 2800/5426 cationic
• CPC Class Codes: A61K 8/044 Suspensions
• CPC Class Codes: A61K 8/345 containing more than one hydroxy group
• CPC Class Codes: A61K 8/73 Polysaccharides
• CPC Class Codes: A61K 8/731 Cellulose; Quaternized cellulose derivatives
• CPC Class Codes: A61K 8/737 Galactomannans, e.g. guar; Derivatives thereof
• CPC Class Codes: A61Q 19/10 Washing or bathing preparations
• CPC Class Codes: A61Q 5/02 Preparations for cleaning the hair
• CPC Class Codes: C08J 2301/28 Alkyl ethers
• CPC Class Codes: C08J 2305/00 Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2301/00 or C08J2303/00
• CPC Class Codes: C08J 3/095 Oxygen containing compounds
• CPC Class Codes: C08L 1/08 Cellulose derivatives
• CPC Class Codes: C08L 5/14 Hemicellulose; Derivatives thereof

Abstract

There are disclosed stable fluidized polymer suspensions containing cationic polysaccharide, stabilizing agent and water-soluble polyol. The preferred cationic polysaccharides are cationic guar and cationic hydroxypropyl guar. Processes for preparing personal care compositions utilizing the fluidized polymer suspensions are also disclosed. Using the fluidized polymer suspensions in the processes provides advantages of more rapid dissolution and avoidance of lumps and gels when compared to using dry, powdered cationic polysaccharides.

Claims

1. A fluidized polymer suspension comprising:

a) cationic polysaccharide at a level of from about 10 to about 65 wt. % of the total fluidized polymer suspension,

b) stabilizing agent selected from the group consisting of silica, mineral pigments, organic pigments, crosslinked polymers and copolymers of acrylic acid, cellulose ethers and mixtures thereof at a level of from about 0.5 to about 3 wt. % of the fluidized polymer suspension, and

c) water-soluble polyol that is a non-solvent for the cationic polysaccharide at a level of from about 35 to about 90 wt.% of the fluidized polymer suspension,

wherein the fluidized polymer suspension is a liquid suspension of particulate cationic polysaccharide in the water soluble polyol, and is stable against agglomeration for at least one week.

2. The fluidized polymer suspension of claim 1 wherein the suspension is stable for at least about 8 weeks.

3. The fluidized polymer suspension of claim 1 wherein the suspension is stable for at least about 6 months.

4. The fluidized polymer suspension of claim 1 wherein the cationic polysaccharide is at least one member selected from the group consisting of cationic guar, hydrophobically modified cationic guar, cationic hydroxypropyl guar, cationic hydrophobically modified hydroxypropyl guar, cationic hydroxyethyl guar, cationic hydrophobically modified hydroxyethyl guar, cationic hydroxyethyl cellulose and cationic hydrophobically modified hydroxyethyl cellulose.

5. The fluidized polymer suspension of claim 1 wherein the cationic polysaccharide comprises cationic guar.

6. The fluidized polymer suspension of claim 1 wherein the cationic polysaccharide comprises cationic hydroxypropyl guar.

7. The fluidized polymer suspension of claim 1 wherein the water-soluble polyol that is a non-solvent for the cationic polysaccharide is selecred from the group consisting of polyethylene glycol, polypropylene glycol, diethylene glycol, glycerine, propylene glycol, ethylene glycol and mixtures thereof.

8. The fluidized polymer suspension of claim 1 wherein the water-soluble polyol that is a non-solvent for the cationic polysaccharide comprises polyethylene glycol having a molecular weight between about 150 and 600.

9. The fluidized polymer suspension of claim 1 wherein the stabilizing agent comprises mineral pigment selected from the group consisting of calcium carbonate, titanium dioxide, clay, talc, and gypsum.

10. The fluidized polymer suspension of claim 1 wherein the stabilizing agent comprises silica.

11. The fluidized polymer suspension of claim 1 wherein the cationic polysaccharide is from about 15 to about 60 wt. % of the total weight of the fluidized polymer suspension.

12. The fluidized polymer suspension of claim 1 wherein the cationic polysaccharide is from about 20 to about 50 wt. % of the total weight of the fluidized polymer suspension.

13. The fluidized polymer suspension of claim 1 wherein the water-soluble polyol that is a non-solvent for the cationic polysaccharide is from about 50 to about 80 wt. % of the total weight of the fluidized polymer suspension.

14. The fluidized polymer suspension of claim 1 further comprising water.

15. The fluidized polymer suspension of claim 1 wherein the cationic polysaccharide is at least one member selected from the group consisting of cationic guar, hydrophobically modified cationic guar, cationic hydroxypropyl guar, cationic hydrophobically modified hydroxypropyl guar, cationic hydroxyethyl guar, cationic hydrophobically modified hydroxyethyl guar, cationic hydroxyethyl cellulose and cationic hydrophobically modified hydroxyethyl cellulose, and

the water-soluble polyol that is a non-solvent for the cationic polysaccharide is selected from the group consisting of polyethylene glycol, polypropylene glycol, diethylene glycol, glycerine, propylene glycol, ethylene glycol and mixtures thereof.

16. The fluidized polymer suspension of claim 1 wherein the cationic polysaccharide comprises cationic guar, the water-soluble polyol that is a non-solvent for the cationic polysaccharide comprises polyethylene glycol having a molecular weight between about 150 and 600, and the stabilizing agent comprises silica.

17. The fluidized polymer suspension of claim 1 wherein the cationic polysaccharide comprises cationic hydroxypropyl guar, the water-soluble polyol that is a non-solvent for the cationic polysaccharide comprises polyethylene glycol having a molecular weight between about 150 and 600, and the stabilizing agent comprises silica.