Hair care system concentrate

Abstract

A hair care system concentrate is provided, comprising: 9 to 15 wt % of a cellulose based cationic polymer; 39 to 60 wt % a polyalkylene glycol; 9 to 15 wt % a film forming nonionic polyethylene glycol polymer; 2.5 to 20 wt % a linear polypropylene glycol; and, 10 to 35 wt % a polyethylene glycol diester of stearic acid. Also provided is a method of making a hair care system concentrate.

Claims

1. A hair care system concentrate, comprising: 9 to 15 wt % of a cellulose based cationic polymer; wherein the cellulose based cationic polymer is selected from the group consisting of polyquaternium-10, polyquaterniums-24, polyquaternium-27, polyquaternium-67, polyquaternium-72 and mixtures thereof; 39 to 60 wt % a polyalkylene glycol; wherein the polyalkylene glycol is according to formula I ##STR00009## wherein R.sup.1 is a C.sub.220 alkyl group; and wherein n has an average value of 10 to 20; 9 to 15 wt % a film forming nonionic polyethylene glycol polymer; wherein the film forming nonionic polyethylene glycol polymer is according to formula II
H(OCH.sub.2CH.sub.2).sub.mOHII wherein m has an average value of 13,000 to 92,000; 2.5 to 20 wt % a linear polypropylene glycol; wherein the linear polypropylene glycol has an average of two terminal hydroxyl groups per molecule and a weight average molecular weight of 350 to 600 Daltons; and, 10 to 35 wt % a polyethylene glycol diester of stearic acid; wherein the polyethylene glycol diester of stearic acid is according to formula III ##STR00010## wherein x has an average value of 130 to 170.

2. The hair care system concentrate of claim 1, wherein the cellulose based cationic polymer is polyquaternium-67; wherein n has an average value of 12 to 16; wherein m has an average value of 42,000 to 47,000; wherein the linear polypropylene glycol has a weight average molecular weight of 350 to 600 Daltons; and, wherein x has an average value of 140 to 160.

3. The hair care system concentrate of claim 2, wherein R.sup.1 is a C.sub.4 alkyl group.

4. The hair care system concentrate of claim 2, wherein m has an average value of 44,000 to 46,000.

5. The hair care system concentrate of claim 2, wherein the linear polypropylene glycol has a weight average molecular weight of 420 to 430 Daltons.

6. The hair care system concentrate of claim 2, wherein x has an average value of 145 to 155.

7. The hair care system concentrate of claim 2, wherein the cellulose based cationic polymer is polyquaternium-67; wherein R.sup.1 is a C.sub.4 alkyl group; and wherein n has an average value of 12 to 16; wherein m has an average value of 42,000 to 47,000; wherein the linear polypropylene glycol has a weight average molecular weight of 410 to 440 Daltons; and wherein x has an average value of 140 to 160.

8. The hair care system concentrate of claim 1, wherein the hair care system concentrate comprises: 11 to 13 wt % of the cellulose based cationic polymer, wherein the cellulose based cationic polymer is polyquaternium-67; 51 to 53 wt % of the polyalkylene glycol, wherein R.sup.1 is a C.sub.4 alkyl group; and wherein n has an average value of 14; 11 to 12 wt % of the film forming nonionic polyethylene glycol polymer according to formula II, wherein m has an average value of 42,000 to 47,000; 4 to 6 wt % of the linear polypropylene glycol, wherein the linear polypropylene glycol has a weight average molecular weight of 400 to 450 Daltons; and, 18 to 20 wt % of the polyethylene glycol diester of stearic acid, wherein x has an average value of 140 to 160.

9. A method of making a hair care system concentrate, comprising: providing a cellulose based cationic polymer; providing a polyalkylene glycol; providing a film forming nonionic polyethylene glycol polymer; providing a linear polypropylene glycol; providing a polyethylene glycol diester of stearic acid; heating the linear polypropylene glycol and the polyethylene glycol diester of stearic acid to 65 to 80 C.; combining the linear polypropylene glycol and the polyethylene glycol diester of stearic acid to form a combination; then adding the polyalkylene glycol to the combination while allowing the temperature of the combination to cool to 45 C.; and, then adding the cellulose based cationic polymer and the film forming nonionic polyethylene glycol polymer to the combination to form the hair care system concentrate.

Description

DETAILED DESCRIPTION

(1) We have now surprising found a unique hair care system concentrate that is both stable and capable of incorporating high concentrations of certain desirable hair care components that happen to be hydrophobic and appropriate concentrations of certain desirable hair care compositions that happen to be hydrophilic and solid at room temperature and capable of easy incorporation into hair care formulations (e.g., hair care conditioners and hair care shampoos).

(2) Unless otherwise indicated, ratios, percentages, parts, and the like are by weight.

(3) As used herein, unless otherwise indicated, the phrase molecular weight or Mw refers to the weight average molecular weight as measured in a conventional manner with gel permeation chromatography (GPC) and polyacrylic acid standards. GPC techniques are discussed in detail in Modem Size Exclusion Chromatography, W. W. Yau, J. J. Kirkland, D. D. Bly; Wiley-lnterscience, 1979, and in A Guide to Materials Characterization and Chemical Analysis, J. P. Sibilia; VCH, 1988, p.81-84. Molecular weights are reported herein in units of Daltons.

(4) The term polymer as used herein and in the appended claims refers to a compound prepared by polymerizing monomers, whether of the same or a different type. The generic term polymer includes the terms homopolymer, copolymer, and terpolymer.

(5) The term hair care as used herein and in the appended claims relates to concentrates formulated for use in the preparation of compositions for topical application to hair, in particular, to human hair. Examples of such compositions include, but are not limited to, leave-on hair conditioners, rinse off hair conditioners, shampoos, styling gels, hair masks and combing creams.

(6) The term cosmetically acceptable as used herein and in the appended claims refers to ingredients typically used in hair care compositions, and is intended to underscore that materials that are toxic when present in the amounts typically found in hair care compositions are not contemplated as part of the present invention.

(7) The term stable as used herein and in the appended claims in reference to the hair care system concentrate means that the hair care system concentrate does not display syneresis apparent by unaided visual observation.

(8) The term storage stable as used herein and in the appended claims in reference to the hair care system concentrate means that the hair care system concentrate does not display syneresis apparent by unaided visual observation during storage of the hair care system concentrate at 25 C. for a period of at least twelve (12) weeks.

(9) The term enhanced storage stability as used herein and in the appended claims in reference to the hair care system concentrate means that the hair care system concentrate does not display syneresis apparent by unaided visual observation during storage of the hair care system concentrate at a temperature of 5 to 45 C. for a period of at least twelve (12) weeks.

(10) Preferably, the hair care system concentrate of the present invention, comprises: 9 to 15 wt % (preferably, 10 to 14; more preferably 11 to 13; most preferably, 12 wt %) of a cellulose based cationic polymer (preferably, wherein the cellulose based cationic polymer is selected from the group consisting of polyquaternium-10, polyquaterniums-24, polyquaternium-27, polyquaternium-67, polyquaternium-72 and mixtures thereof); 39 to 60 wt % (preferably, 45 to 58 wt %; more preferably, 51 to 53 wt %; most preferably, 52 wt %) a polyalkylene glycol (preferably, wherein the polyalkylene glycol is according to formula I

(11) ##STR00003##
wherein IV is a C.sub.2-20 alkyl group (preferably, a C.sub.4-18 alkyl group; more preferably, a C.sub.4-10 alkyl group; most preferably, a C.sub.4 alkyl group); and wherein n has an average value of 10 to 20 (preferably, 12 to 16; more preferably, 13 to 15; most preferably, 14)); 9 to 15 wt% (preferably, 10 to 14; more preferably 11 to 13; most preferably, 12 wt %) a film forming nonionic polyethylene glycol polymer (preferably, wherein the film forming nonionic polyethylene glycol polymer is according to formula II
H(OCH.sub.2CH.sub.2).sub.mOH
wherein m has an average value of 13,000 to 92,000 (preferably, 35,000 to 80,000; more preferably, 40,000 to 50,000; yet more preferably, 42,000 to 47,000; most preferably, 44,000 to 46,000)); 2.5 to 20 wt % (preferably, 2.5 to 10 wt %; more preferably, 3 to 7.5 wt %; yet more preferably, 4 to 6 wt %; most preferably, 5 wt %) a linear polypropylene glycol (preferably, wherein the linear polypropylene glycol has an average of two terminal hydroxyl groups per molecule and a weight average molecular weight of 350 to 600 Daltons)); and, 10 to 35 wt % (preferably, 16 to 25 wt %; more preferably, 18 to 20 wt %; most preferably, 19 wt %) a polyethylene glycol diester of stearic acid (preferably, wherein the polyethylene glycol diester of stearic acid is according to formula III

(12) ##STR00004##
wherein x has an average value of 130 to 170 (preferably, 140 to 160; more preferably, 145 to 155; most preferably, 150)).

(13) Preferably, the hair care system concentrate of the present invention is stable. More preferably, the hair care system concentrate of the present invention is storage stable. Most preferably, the hair care system concentrate of the present invention has enhanced storage stability.

(14) Preferably, the cellulose based cationic polymer used in the hair care system concentrate of the present invention is a cosmetically acceptable cellulose based cationic polymer. More preferably, the cellulose based cationic polymer used in the hair care system concentrate of the present invention is a cosmetically acceptable cellulose based cationic polymer, wherein the cellulosed based cationic polymer is selected from the group consisting of polyquaternium-10, polyquaterniums-24, polyquaternium-27, polyquaternium-67, polyquaternium-72 and mixtures thereof. Most preferably, the cellulose based cationic polymer is polyquaternium-67.

(15) Preferably, the hair care system concentrate of the present invention contains 9 to 15 wt % of a cellulose based cationic polymer. More preferably, the hair care system concentrate of the present invention contains 10 to 14 wt % of a cellulose based cationic polymer. Still more preferably, the hair care system concentrate of the present invention contains 11 to 13 wt % of a cellulose based cationic polymer. Most preferably, the hair care system concentrate of the present invention contains 12 wt % of a cellulose based cationic polymer.

(16) Preferably, the polyalkylene glycol used in the hair care system concentrate of the present invention is a cosmetically acceptable polyalkylene glycol. More preferably, the polyalkylene glycol used in the hair care system concentrate of the present invention is a cosmetically acceptable polyalkylene glycol, wherein the polyalkylene glycol is according to formula I

(17) ##STR00005##
wherein R.sup.1 is a C.sub.2-20 alkyl group (preferably, a C.sub.4-18 alkyl group; more preferably, a C.sub.4-10 alkyl group; most preferably, a C.sub.4 alkyl group); and wherein n has an average value of 10 to 20 (preferably, 12 to 16; more preferably, 13 to 15; most preferably, 14). Most preferably, the polyalkylene glycol is according to the formula I, wherein n has an average value of 12 to 16.

(18) Preferably, the hair care system concentrate of the present invention contains 39 to 60 wt % of a polyalkylene glycol. More preferably, the hair care system concentrate of the present invention contains 45 to 58 wt % of a polyalkylene glycol. Still more preferably, the hair care system concentrate of the present invention contains 51 to 53 wt % of a polyalkylene glycol. Most preferably, the hair care system concentrate of the present invention contains 52 wt % of a polyalkylene glycol.

(19) Preferably, the film forming nonionic polyethylene glycol polymer used in the hair care system concentrate of the present invention is a cosmetically acceptable film forming nonionic polyethylene glycol polymer. Preferably, the film forming nonionic polyethylene glycol polymer used in the hair care system concentrate of the present invention is a cosmetically acceptable film forming nonionic polyethylene glycol polymer, wherein the film forming nonionic polyethylene glycol polymer is according to formula II
H(OCH.sub.2CH.sub.2).sub.mOH
wherein m has an average value of 13,000 to 92,000. More preferably, the film forming nonionic polyethylene glycol polymer used in the hair care system concentrate of the present invention is a cosmetically acceptable film forming nonionic polyethylene glycol polymer, wherein the film forming nonionic polyethylene glycol polymer is according to formula II, wherein m has an average value of 35,000 to 80,000. Still more preferably, the film forming nonionic polyethylene glycol polymer used in the hair care system concentrate of the present invention is a cosmetically acceptable film forming nonionic polyethylene glycol polymer, wherein the film forming nonionic polyethylene glycol polymer is according to formula II, wherein m has an average value of 40,000 to 50,000. Yet still more preferably, the film forming nonionic polyethylene glycol polymer used in the hair care system concentrate of the present invention is a cosmetically acceptable film forming nonionic polyethylene glycol polymer, wherein the film forming nonionic polyethylene glycol polymer is according to formula II, wherein m has an average value of 42,000 to 47,000. Most preferably, the film forming nonionic polyethylene glycol polymer used in the hair care system concentrate of the present invention is a cosmetically acceptable film forming nonionic polyethylene glycol polymer, wherein the film forming nonionic polyethylene glycol polymer is according to formula II, wherein m has an average value of 44,000 to 46,000.

(20) Preferably, the hair care system concentrate of the present invention contains 9 to 15 wt % of a film forming nonionic polyethylene glycol polymer. More preferably, the hair care system concentrate of the present invention contains 10 to 14 wt % of a film forming nonionic polyethylene glycol polymer. Still more preferably, the hair care system concentrate of the present invention contains 11 to 13 wt % of a film forming nonionic polyethylene glycol polymer. Most preferably, the hair system care concentrate of the present invention contains 12 wt % of a film forming nonionic polyethylene glycol polymer.

(21) Preferably, the linear polypropylene glycol used in the hair care system concentrate of the present invention is a cosmetically acceptable linear polypropylene glycol. More preferably, the linear polypropylene glycol used in the hair care system concentrate of the present invention is a cosmetically acceptable linear polypropylene glycol, wherein the linear polypropylene glycol has an average of two terminal hydroxyl groups per molecule and a weight average molecular weight of 350 to 600 Daltons. Still more preferably, the linear polypropylene glycol used in the hair care system concentrate of the present invention is a cosmetically acceptable linear polypropylene glycol, wherein the linear polypropylene glycol has an average of two terminal hydroxyl groups per molecule and a weight average molecular weight of 410 to 440 Daltons. Yet still more preferably, the linear polypropylene glycol used in the hair care system concentrate of the present invention is a cosmetically acceptable linear polypropylene glycol, wherein the linear polypropylene glycol has an average of two terminal hydroxyl groups per molecule and a weight average molecular weight of 420 to 430 Daltons. Most preferably, the linear polypropylene glycol used in the hair care system concentrate of the present invention is a cosmetically acceptable linear polypropylene glycol, wherein the linear polypropylene glycol has an average of two terminal hydroxyl groups per molecule and a weight average molecular weight of 425 Daltons.

(22) Preferably, the hair care system concentrate of the present invention contains 2.5 to 20 wt % of a linear polypropylene glycol. More preferably, the hair care system concentrate of the present invention contains 2.5 to 10 wt % of a linear polypropylene glycol. Yet more preferably, the hair care system concentrate of the present invention contains 3 to 7 wt % of a linear polypropylene glycol. Still more preferably, the hair care system concentrate of the present invention contains 4 to 6 wt % of a linear polypropylene glycol. Most preferably, the hair care system concentrate of the present invention contains 5 wt % of a linear polypropylene glycol.

(23) Preferably, the polyethylene glycol diester of stearic acid used in the hair care system concentrate of the present invention is a cosmetically acceptable polyethylene glycol diester of stearic acid. More preferably, the polyethylene glycol diester of stearic acid used in the hair care system concentrate of the present invention is a cosmetically acceptable polyethylene glycol diester of stearic acid, wherein the polyethylene glycol diester of stearic acid is according to formula III

(24) ##STR00006##
wherein x has an average value of 130 to 170. Still more preferably, the polyethylene glycol diester of stearic acid used in the hair care system concentrate of the present invention is a cosmetically acceptable polyethylene glycol diester of stearic acid, wherein the polyethylene glycol diester of stearic acid is according to formula III, wherein x has an average value of 140 to 160. Yet still more preferably, the polyethylene glycol diester of stearic acid used in the hair care system concentrate of the present invention is a cosmetically acceptable polyethylene glycol diester of stearic acid, wherein the polyethylene glycol diester of stearic acid is according to formula III, wherein x has an average value of 145 to 155. Most preferably, the polyethylene glycol diester of stearic acid used in the hair care system concentrate of the present invention is a cosmetically acceptable polyethylene glycol diester of stearic acid, wherein the polyethylene glycol diester of stearic acid is according to formula III, wherein x has an average value of 150.

(25) Preferably, the hair care system concentrate of the present invention contains 10 to 35 wt % of a polyethylene glycol diester of stearic acid. More preferably, the hair care system concentrate of the present invention contains 16 to 25 wt % of a polyethylene glycol diester of stearic acid. Still more preferably, the hair care system concentrate of the present invention contains 18 to 20 wt % of a polyethylene glycol diester of stearic acid. Most preferably, the hair care system concentrate of the present invention contains 19 wt % of a polyethylene glycol diester of stearic acid.

(26) Preferably, the method of making a hair care system concentrate of the present invention, comprises: providing a cellulose based cationic polymer (preferably, wherein the cellulose based cationic polymer is a cosmetically acceptable cellulosed based cationic polymer selected from the group consisting of polyquaternium-10, polyquaternium-24, polyquaternium-27, polyquaternium-67, polyquaternium-72 and mixtures thereof); providing a polyalkylene glycol (preferably, wherein the polyalkylene glycol is a cosmetically acceptable polyalkylene glycol according to formula I

(27) ##STR00007##
wherein R.sup.1 is a C.sub.2-20 alkyl group (preferably, a C.sub.4-18 alkyl group; more preferably, a C.sub.4-10 alkyl group; most preferably, a C.sub.4 alkyl group); and wherein n has an average value of 10 to 20 (preferably, 12 to 16; more preferably, 13 to 15; most preferably, 14)); providing a film forming nonionic polyethylene glycol polymer (preferably, wherein the film forming nonionic polyethylene glycol polymer is a cosmetically acceptable polyalkylene glycol according to formula II
H(OCH.sub.2CH.sub.2).sub.mOH
wherein m has an average value of 13,000 to 92,000 (preferably, 35,000 to 80,000; more preferably, 40,000 to 50,000; yet more preferably, 42,000 to 47,000; most preferably, 44,000 to 46,000)); providing a linear polypropylene glycol (preferably, wherein the linear polypropylene glycol is a cosmetically acceptable linear polypropylene glycol having an average of two terminal hydroxyl groups per molecule and a weight average molecular weight of 350 to 600 Daltons); providing a polyethylene glycol diester of stearic acid (preferably, wherein the polyethylene glycol diester of stearic acid is a cosmetically acceptable polyethylene glycol diester of stearic acid according to formula III

(28) ##STR00008##
wherein x has an average value of 130 to 170 (preferably, 140 to 160; more preferably, 145 to 155; most preferably, 150)); heating the linear polypropylene glycol and the polyethylene glycol diester of stearic acid to >65 C. (preferably, 65 to 100 C.; more preferably, 65 to 80 C.; most preferably, 70 to 75 C.); combining the linear polypropylene glycol and the polyethylene glycol diester of stearic acid (preferably, with agitation) to form a combination; then adding the polyalkylene glycol to the combination (preferably, with continued agitation) while allowing the temperature of the combination to cool to 45 C.; and, then adding the cellulose based cationic polymer and the film forming nonionic polyethylene glycol polymer to the combination (preferably, with continued agitation) to form the hair care system concentrate.

(29) Some embodiments of the present invention will now be described in detail in the following Examples.

Examples 1-2: Preparation Hair Care System Concentrate

(30) In each of Examples 1-2, a hair care system concentrate having the composition noted in TABLE 1 was prepared in a flask outfitted with a heating mantle and a stirring bar. PPG-9 (Polyglycol P425 P series polyglycol available from The Dow Chemical Company) was added to the flask and heated to a temperature of 70 to 75 C. Then PEG 150 distearate (Aculyn 60 polymer available from The Dow Chemical Company) was added to the flask with stirring for about 10 minutes while maintaining the temperature set point at 70 to 75 C. to provide a homogenous mixture. The heating mantle was then removed from the flask and PPG-14 butyl ether (Ucon fluid AP available from The Dow Chemical Company) was introduced to the flask contents slowly over a period of about 10 minutes with continued stirring. The flask contents were then allowed to continue cooling to 45 C. A premixture of polyquaternium-67 (Softcat SX Polymer SX-1300X available from The Dow Chemical Company) and PEG-45M (Polyox WSR N60K available from The Dow Chemical Company) were then slowly added to the flask contents with continued stirring. Then continue stirring the contents of the flask for 40 to 50 minutes to provide the product hair care system concentrate.

(31) TABLE-US-00001 TABLE 1 Final system Component concentration (wt %) INCI Name Commercial Name.sup.a Ex. 1 Ex. 2 PPG-9 Polyglycol P425 5.0 18.0 PPG-14 butyl ether Ucon Fluid AP 52.0 42.0 Polyquaternium-67 Softcat SX Polymer 12.0 15.0 SX-1300X PEG-45M Polyox WSR N60K 12.0 15.0 PEG150 Distearate Aculyn 60 polymer 19.0 10.0 .sup.aAvailable from The Dow Chemical Company

Stability Evaluations

(32) The stability of a hair care system concentrates prepared according to Examples 1 and 2 were evaluated over a three month period. Each of the hair care system concentrates was divided into three samples. One sample was maintained at 5 C. over the three month period. A second sample was maintained at 25 C. over the three month period. A third sample was maintained at 45 C. over the three month period. The evaluation included a visual assessment and an evaluation of the rheological behavior of each of the three samples of the hair care system concentrate. Visual inspection of the samples over the three month period showed no syneresis in any of the samples. The visual inspection did show some yellowing of the hair care system concentrate over the three month period in the sample maintained at 45 C. The rheological behavior of the sample of the hair care system concentrate maintained at 25 C. remained unchanged over the thirty day period. A slight drop in the viscosity was observed for the samples of the hair care system concentrate maintained at 5 C. and at 4 C.

Comparative Example C1: Order of Addition

(33) Comparative combinations having the same composition noted in TABLE 1 were prepared using the same flask outfitted with a heating mantle and a stirring bar as used in Example 1. In the comparative combinations of Comparative Example C1, the order of addition of the various components were modified. From these comparative combinations, it was determined critical that the PEG150 Distearate be added to the flask before the PPG-14 butyl ether, the polyquaterniums-67 and the PEG-45M to avoid liquid separation or syneresis in the product obtained.

Comparative Example C2: Temperature when Added

(34) Comparative combinations having the same composition noted in TABLE 1 were prepared using the same flask outfitted with a heating mantle and a stirring bar as used in Example 1. In the comparative combinations of Comparative Example C2, the components were added to the flask in the same order as in Example 1. In contrast to Example 1, however, the temperature of the flask contents were >45 C. when the polyquaterniums-67 and the PEG-45M were added to the flask in each of the comparative combinations of Comparative Example C2, resulting in a thick paste.

Comparative Example C3: Film Forming Nonionic Polyethylene Glycol Polymer

(35) Comparative combinations having the same composition noted in TABLE 1 with the exception that the PEG-45M was substituted with PEG-90M (Polyox WSR N301 available from The Dow Chemical Company) was prepared using the same flask outfitted with a heating mantle and a stirring bar as used in Example 1. The resulting composition was extremely elastic and was not amenable to pumping.

Comparative Example C4: Polyethylene Glycol Diester of Stearic Acid Concentration

(36) A plurality of hair care system concentrates were prepared having the same component content as present in Example 1 with the exception that the amount of PEG150 distearate added was varied to provide a dosage concentration thereof in the final system concentrate ranging from 3 to 20 wt %. The hair care system concentrates having a PEG150 distearate concentration of 10 to 19 wt % were observed not to exhibit syneresis.

Example 3: Hair Care Composition

(37) A hair care system concentrate prepared according to Example 1 was added to an aqueous base conditioner formulation to provide a product aqueous hair care conditioner composition as described in TABLE 2.

(38) TABLE-US-00002 TABLE 2 Ingredient wt % Stearamidopropyl dimethylamine 1.50 Cethearyl alcohol 5.00 Lactic acid, 85% 0.52 BHT 0.05 Dissodium EDTA 0.10 Behentrimonium chloride 0.30 Preservative 0.50 Hair care system concentrate 1.50