US5624666A
Expired / Lapsed
US
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Anti-dandruff shampoos with particulate active agent and cationic polymer
Assignee: Procter and Gamble Co
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Filing: 1995-01-20
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Granted: 1997-04-29
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Expires: 2015-01-20
Abstract
Abstract Provided is a anti-dandruff shampoo composition comprising: (a) from about 8% to about 40%, by weight, of anionic detersive surfactant; (b) from about 0.1% to about 5%, by weight, of particulate anti-dandruff agent having an average particle size of from about 0.35 microns to about 5 microns; (c) from about 0.01% to about 1.0%, by weight, of a stabilizing agent for said anti-dandruff agent, said stabilizing agent being a soluble cationic polymer; (d)from about 50% to about 91.89%, by weight, water; wherein said shampoo composition is substantially free of suspending agents selected from the group consisting of crystalline suspending agents and anionic, nonionic, and amphoteric polymeric suspending agents. Also provided is a process used for making the present compositions wherein said particulate anti-dandruff agent and said cationic polymer are admixed in water in the presence of anionic detersive surfactant.
Inventors
- 👤 Timothy W. Coffindaffer
- 👤 Philip E. Cothran
- 👤 Thomas F. Gauthier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:39
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/006; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/23; A61K8/30; A61K8/49; A61K8/4906; A61K8/4933; A61K8/72; A61K8/73; A61K8/731; A61Q5/02; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412; A61K2800/54; A61K2800/542; A61K2800/5426
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
115 words
An anti-dandruff shampoo composition comprising: (a) from about 8% to about 40%, by weight, of anionic detersive surfactant; (b) from about 0.1% to about 5%, by weight, of particulate anti-dandruff agent having a volume average particle size of from about 0.35 microns to about 5 microns; (c) from about 0.01% to about 1%, by weight, of a stabilizing agent for said anti-dandruff agent, said stabilizing agent being a shampoo soluble cationic polymer; and (d) from about 50% to about 91.89%, by weight, water; wherein said shampoo composition contains not greater than about 0.1%, by weight, of suspending agents selected from the group consisting of crystalline suspending agents, and anionic, amphoteric, and nonionic polymeric suspending agents.
Claim 2
Dependent Claim
115 words
An anti-dandruff shampoo composition comprising: (a) from about 8% to about 40%, by weight, of anionic detersive surfactant; (b) from about 0.1% to about 5%, by weight, of particulate anti-dandruff agent having a volume average particle size of from about 0.35 microns to about 5 microns; (c) from about 0.01% to about 1%, by weight, of a stabilizing agent for said anti-dandruff agent, said stabilizing agent being a shampoo soluble cationic polymer; and (d) from about 50% to about 91.89%, by weight, water; wherein said shampoo composition contains not greater than about 0.1%, by weight, of suspending agents selected from the group consisting of crystalline suspending agents, and anionic, amphoteric, and nonionic polymeric suspending agents.
Claim 3
Dependent Claim
23 words
An anti-dandruff shampoo composition as in claim 1, wherein said cationic polymer has a weight average molecular weight of at least about 50,000.
Claim 4
Dependent Claim
33 words
An anti-dandruff shampoo composition as in claim 2, wherein said cationic polymer has a weight average molecular weight of at least about 100,000 and a charge density of at least about 0.3 meq/g.
Claim 5
Dependent Claim
38 words
An anti-dandruff shampoo composition as in claim 3, wherein said cationic polymer has a weight average molecular weight of from about 200,000 to about 5,000,000 and a charge density of from about 0.6 meq/g to about 4 meq/g.
Claim 6
Dependent Claim
27 words
An anti-dandruff shampoo composition as in claim 1, wherein said anti-dandruff agent has a volume average particle size of from about 0.4 microns to about 3 microns.
Claim 7
Dependent Claim
27 words
An anti-dandruff shampoo composition as in claim 4, wherein said anti-dandruff agent has a volume average particle size of from about 0.4 microns to about 3 microns.
Claim 8
Dependent Claim
27 words
An anti-dandruff shampoo composition as in claim 1, wherein said anti-dandruff agent is selected from the group consisting of sulfur, selenium sulfide, pyridinethione salts, and mixtures thereof.
Claim 9
Dependent Claim
15 words
An anti-dandruff shampoo composition as in claim 7, wherein said anti-dandruff agent is zinc pyridinethione.
Claim 10
Dependent Claim
15 words
An anti-dandruff shampoo composition as in claim 5, wherein said anti-dandruff agent is zinc pyridinethione.
Claim 11
Dependent Claim
21 words
An anti-dandruff composition as in claim 1, wherein said composition contains about 0.05%, by weight, or less of said suspending agents.
Claim 12
Dependent Claim
61 words
An anti-dandruff shampoo composition as in claim 1, wherein said composition comprises: (a) from about 10% to about 30% of said anionic detersive surfactant; (b) from about 0.3% to about 2% of said anti-dandruff agent; and (c) from about 0.02% to about 0.5% of said stabilizing agent; wherein said cationic polymer has a charge density of at least about 0.3 meq/g.
Claim 13
Independent Claim
129 words
A method for making an anti-dandruff shampoo composition comprising mixing; (a) from about 8% to about 40%, by weight, anionic detersive surfactant; (b) from about 0.1% to about 5%, by weight, of particulate anti-dandruff agent having a volume average particle size of from about 0.35 microns to about 5 microns; (c) from about 0.01% to about 1%, by weight, of stabilizing agent for said anti-dandruff agent, said stabilizing agent being a shampoo soluble cationic polymer; and (d) from about 50% to about 91.89%, by weight, water; wherein said particulate anti-dandruff agent and said cationic polymer are admixed in water in the presence of anionic detersive surfactant, and said composition contains not greater than about 0.1% by weight, of crystalline suspending agents and anionic, amphoteric, and nonionic polymeric suspending agents.
Claim 14
Independent Claim
129 words
A method for making an anti-dandruff shampoo composition comprising mixing; (a) from about 8% to about 40%, by weight, anionic detersive surfactant; (b) from about 0.1% to about 5%, by weight, of particulate anti-dandruff agent having a volume average particle size of from about 0.35 microns to about 5 microns; (c) from about 0.01% to about 1%, by weight, of stabilizing agent for said anti-dandruff agent, said stabilizing agent being a shampoo soluble cationic polymer; and (d) from about 50% to about 91.89%, by weight, water; wherein said particulate anti-dandruff agent and said cationic polymer are admixed in water in the presence of anionic detersive surfactant, and said composition contains not greater than about 0.1% by weight, of crystalline suspending agents and anionic, amphoteric, and nonionic polymeric suspending agents.
Claim 15
Dependent Claim
12 words
An anti-dandruff shampoo composition made according to the method of claim 12.
Claim 16
Dependent Claim
21 words
An anti-dandruff shampoo composition as in claim 1, wherein said stabilizing agent comprises a shampoo soluble cationic polymer having nitrogen-containing moieties.
Claim 17
Dependent Claim
20 words
An anti-dandruff shampoo composition as in claim 14, wherein the nitrogen-containing moieties are quaternary ammonium moieties or cationic amino moieties.
Claim 18
Dependent Claim
28 words
An anti-dandruff shampoo composition as in claim 14, wherein the shampoo soluble cationic polymer comprises a cationic cellulose polymer, a cationic starch polymer or a cationic guar gum.
Claim 19
Dependent Claim
85 words
An anti-dandruff shampoo composition as in claim 14, wherein the shampoo soluble cationic polymer comprises units formed from one or more monomers selected from the group consisting of dialkylaminoalkyl acrylate, dialkylaminoalkyl methacrylate, monoalkylaminoalkyl acrylate, monoalkylaminoalkyl methacrylate, dialkylaminoalkyl acrylamide, dialkylaminoalkyl methacrylamide, trialkyl methacryloxyalkyl ammonium salt, trialkyl acryloxyalkyl ammonium salt, diallyl quaternary ammonium salts, and vinyl quaternary ammonium monomers having cyclic cationic nitrogen-containing rings selected from the group consisting of pyridinium, imidazolium, and quaternized pyrrolidone, wherein alkyl portions of said monomers are C 1 -C 7 alkyls.
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