US4469627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dispersing hydroxypropyl methyl cellulose
Assignee: Colgate Palmolive Co
•
Filing: 1982-09-03
•
Granted: 1984-09-04
•
Expires: 2002-09-03
Abstract
Abstract A method of facilitating the incorporation of hydroxypropyl methyl cellulose (HPMC) into a liquid formulation containing water which comprises: 1. forming a liquid premix of hydroxypropyl methyl cellulose dispersed in an aqueous-free organic liquid medium in which it does not swell or dissolve, selected from the group consisting of liquified nonionic surfactants, fatty acids, anionic surfactants and mixtures thereof, by dispersing HPMC in said liquified organic medium with mild agitation; 2. adding said premix to an aqueous-containing liquid formulation and dispersing therein by means of a short mixing cycle as short as 5-10 minutes. This method has particular utility in the preparation of liquid shampoos, liquid dishwashing detergents, liquid hand soaps and other aqueous-containing liquid formulations wherein it is desirable or necessary to include hydroxypropyl methyl cellulose as a viscosity modifier.
Inventors
- 👤 Thomas J. Trombone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:29
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/37; A61K8/375; A61K8/36; A61K8/361; A61K8/39; A61K8/40; A61K8/42; A61K8/55; A61K8/556; A61K8/72; A61K8/73; A61K8/731; A61Q; A61Q5/00; A61Q5/02; C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08L; C08L1/00; C08L1/08; C08L1/26; C08L1/28; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/22; C11D3/222; C11D3/225; C08J2301/00; C08J2301/08; C08J2301/26; C08J2301/28
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
109 words
A method which facilitates the incorporation of hydroxypropyl methyl cellulose into water or liquid formulations containing water, which comprises forming a premix of hydroxypropyl methyl cellulose dispersed in an aqueous-free organic liquid medium dispersant in which it does not swell or dissolve, selected from the group consisting of liquified nonionic surfactants, higher fatty acids containing 10 to 31 carbon atoms in their chain, anionic surfactants and mixtures thereof, by dispersing one part hydroxypropyl methyl cellulose in about 1 to 10 parts of said liquid organic medium with mild agitation; adding said premix to water or an aqueous-containing liquid formulation, and dispersing therein by means of a short mixing cycle.
Claim 2
Independent Claim
109 words
A method which facilitates the incorporation of hydroxypropyl methyl cellulose into water or liquid formulations containing water, which comprises forming a premix of hydroxypropyl methyl cellulose dispersed in an aqueous-free organic liquid medium dispersant in which it does not swell or dissolve, selected from the group consisting of liquified nonionic surfactants, higher fatty acids containing 10 to 31 carbon atoms in their chain, anionic surfactants and mixtures thereof, by dispersing one part hydroxypropyl methyl cellulose in about 1 to 10 parts of said liquid organic medium with mild agitation; adding said premix to water or an aqueous-containing liquid formulation, and dispersing therein by means of a short mixing cycle.
Claim 3
Dependent Claim
23 words
The method in accordance with claim 1, wherein said organic medium dispersant is liquified by heating at a temperature of about 75°-120° F.
Claim 4
Dependent Claim
40 words
The method in accordance with claim 2, wherein said premix dispersion is in the form of a warm liquid which is readily dispersed in water or a water-containing liquid formulation, to form a homogeneous liquid free of particles and lumps.
Claim 5
Dependent Claim
37 words
The method of claim 2, wherein said premix is allowed to cool to room temperature and solidify into a paste which is readily incorporated into water or an aqueous-containing liquid formulation to form a lump-free homogeneous liquid.
Claim 6
Dependent Claim
37 words
The method in accordance with claim 4, wherein said solidified premix is aged and then reliquified by heating to a temperature of about 85° to 105° F., prior to addition to water or a water-containing liquid formulation.
Claim 7
Dependent Claim
21 words
The method in accordance with claim 1, wherein the short mixing cycle is as short as about 5 to 10 minutes.
Claim 8
Dependent Claim
30 words
The method in accordance with claim 1, wherein a perfume is added to said premix to form a perfumed premix which retains its liquid state upon cooling to room temperature.
Claim 9
Dependent Claim
31 words
The method in accordance with claim 1, wherein the water-containing liquid formulation is a shampoo, and the premix constitutes said formula amount of hydroxypropyl methyl cellulose and aqueous-free organic dispersant ingredients.
Claim 10
Dependent Claim
30 words
The method in accordance with claim 1, wherein the nonaqueous organic dispersant for the hydroxypropyl methyl cellulose is a blend of lauric diethanolamide, lauric acid, and polyoxyethylene lauryl ether phosphate.
Claim 11
Dependent Claim
29 words
The method in accordance with claim 1, wherein the non-aqueous organic dispersant for the hydroxypropyl methyl cellulose is ethoxylated C 12-15 alcohol containing 7 moles ethylene oxide per mole.
Claim 12
Dependent Claim
18 words
The method according to claim 1, wherein the non-aqueous dispersant for the hydroxypropyl methyl cellulose is stearic acid.
Claim 13
Dependent Claim
19 words
The method according to claim 1, wherein the non-aqueous dispersant for the hydroxypropyl methyl cellulose is ethylene glycol distearate.
References Cited (Backward Citations)
US3503895A
Cited
US3522070A
Cited
US3402137A
Cited
US3960584A
Cited
US4231802A
Cited
US4330414A
Cited
US4414144A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |