Drug – bio-affecting and body treating compositions – Effervescent or pressurized fluid containing – Organic pressurized fluid
Reexamination Certificate
2001-11-06
2003-07-08
Venkat, Jyothsan (Department: 1615)
Drug, bio-affecting and body treating compositions
Effervescent or pressurized fluid containing
Organic pressurized fluid
C424S070122, C424S070150, C424S070160, C424S070170
Reexamination Certificate
active
06589510
ABSTRACT:
BACKGROUND OF THE INVENTION
The subject matter of the present invention is a hair treatment product, with which it is possible to strengthen the hair shaft and to impart volume to a particular hair-do or hairstyle. This product includes an aqueous, polymeric and surfactant-containing composition, from which foam is produced when the product is used by means of an aerosol propellant. However this product includes an aerosol container for the composition, which is equipped with a spray head instead of a foam head, so that very rapidly breaking unstable spray foam is formed from the composition in use.
Hair treatment compositions in aerosol form are generally divided into two groups: aerosol hair sprays and aerosol hair foams. The aerosol hair sprays are sprayed on the entire hair-do or hairstyle and thus the hair-do or hairstyle is fixed or set. It is not possible to separately style individual sections of the hair. Aerosol foams are first applied to the hand and then subsequently distributed on the hair with the hand. Also a desired treatment of individual sections of the hair is not possible with aerosol foams. Moreover the treated hair is wet over its entire length with a polymer-containing composition during application of conventional aerosol foams and sprays. The hair no longer feels natural because of the presence of the polymer-containing composition on it. The feel of the hair is then determined by the nature of the polymer film on the hair. This polymer film produces a notable negative impression, especially on fine hair. Frequently observed additional undesirable side effects include a rough feel of the treated hair, a high load on the hair, insufficient elasticity of the treated hair and a visible residue formed on the treated hair.
SUMMARY OF THE INVENTION
It is an object of the present invention to make it possible to impart more volume and to fix individual sections of the hair, without loading the hair or imparting an unnatural feel to the hair.
It has now been found that this object is attained by a hair treatment product for strengthening the hair shaft, which includes a pressure-resistant aerosol container with a hair spray head and a composition contained in the aerosol container. This composition forms rapidly breaking, unstable foam when it is sprayed. This composition comprises
(A) at least 60 percent by weight, water;
(B) at least one foam-breaking agent;
(C) at least one surfactant;
(D) at least one hair-fixing polymer with strong hair-fixing properties, which is selected from those hair-fixing polymers that provide a higher curl retention than polyvinyl pyrrolidone, measured after 23 hours at 20° C. and 85% relative humidity; and
(E) at least one aerosol propellant.
When a spray head with a narrow spray angle is selected it is possible to spray the composition in the product of the invention on the hair shafts. Thus unstable foam is produced on the hair shaft, which can act as a temporary indicator for the treated hair section. The foam breaks on the hair shafts rapidly, without working it in the hair, i.e. without contact by the hands, as is the case with conventional hair foams. The foam breaking is advantageously accelerated using a hair drier.
Hair-fixing Polymer
A strongly fixing hair-fixing polymer is used as component (D) of the composition. Polymers, which provide an especially strong fixing of the hair, frequently have the disadvantage that they impart an unnatural, stiff and rough feel to the hair, when they are used in a conventional hair spray or foam and thus are applied usually to the entire hair. These kinds of polymers however are especially suitable in the products according to the invention. Since the volume effect is exclusively produced by fixing the hair shafts, i.e. by fixing a relatively small part of the hair in the vicinity of the scalp, there are special requirements for the quality of the fixing and/or the polymer film produced by it. Otherwise, if these requirements are not met, the remaining part of the hair strands act like a quasi-lever and the desired effect is not produced. Thus particularly polymers, which form an especially strong inflexible or rough film, are especially suitable, i.e. those polymers which are disadvantageous in conventional hair sprays.
Those polymers which have a stronger fixing action than the standard fixing polymers, polyvinyl pyrrolidone or vinyl pyrrolidone/vinyl acetate copolymer, are especially suitable as the strongly fixing hair-fixing polymers in the product according to the invention. The fixing strength is determined by measuring curl retention after 23 hours at 20° C. and 85% relative humidity. Polymers, which have about at least 20%, especially about at least 40%, curl retention in comparison to untreated hair, under the foregoing conditions are especially preferred.
The fixing polymers (D) are used in an amount of preferably from 0.1 to 20, especially preferably from 1 to 5, percent by weight.
Suitable hair-fixing polymers are, for example, polymers, which are made by the process described in W 99/67216. These polymers contain repeating units of alpha-olefin N-alkylmaleimide or alph-olefin N-hydroxyalkylmaleimide. An imidated poly(isobutylen-co-maleic acid anhydride), a polymer with the INCl name, isobutylene/ethylmaleimide/hydroxyethylmaleimide copolymer, is especially suitable. AQUAFLEX® FX-64 of ISP is an especially suitable commercial product.
Suitable fixing polymers also include amphoteric copolymers, formed from alkylacrylamides, alkylaminoalkylmethacrylates and two or more monomers selected from the group consisting of acrylic acid, methacrylic acid or their esters, of which at least one of the monomers contains an acid group. The alkyl groups can contain from 1 to ten carbon atoms. The copolymer formed from octylacrylamide, t-butylaminoethylmethacrylate and two or more monomers selected from the group consisting of acrylic acid, methacrylic acid or their esters, of which at least one of the monomers contains an acid group, which has the INCl name, octylacrylamide/acrylate/butylaminoethylmethacrylate copolymer, is particularly preferred. AMPHOMER® or AMPPHOMER® LV-71 of National Starch Co. is an especially suitable commercial product.
Additional suitable polymers include copolymers of vinylpyrrolidone and quaternary dialkylaminoalkylacrylates. The alkyl groups can contain from one to four carbon atoms. A copolymer formed from vinylpyrrolidone and quaternarized dimethylaminoethylmethacrylate, which has the INCl name Polyquaternium 11, is especially suitable. GAFQUAT® 755 N of ISP or LUVIQUAT® PQ11 of BASF are especially suitable commercial products.
Copolymers of vinyl acetate and crotonic acid with the INCl name VA/crotonate copolymer are also suitable for the composition of the invention. LUVISET® CA66 of BASF is a suitable commercial product.
Copolymers of acrylamides and one or more monomers selected from the group consisting of acrylic acid, methacrylic acid and their simple esters, especially C
1
- to C
4
-alkyl esters, are also additional suitable polymers. At least one monomer of these polymers should contain a carboxylic acid group. Preferred acrylamides include N—C
1
- to C
4
-alkylacrylamides, which have the INCl name acrylates/acrylamide copolymer. An acrylic acid/ethylacrylate/N-tert.-butyl-acrylamide terpolymer is especially preferred. ULTRAHOLD® 8 of BASF is a suitable commercial product.
Terpolymers of vinyl pyrrolidone, vinyl caprolactam and a basic acrylamide monomer, preferably dialkylaminoalkylmethacrylmaide, in which the alkyl group have from 1 to 4 carbon atoms, are additional suitable polymers. A vinylpyrrolidone/vinylcaprolactam/dimethylaminopropylmethacrylamide terpolymer is particularly preferred. AQUAFLEX® SF40 of ISP, which has the INCl name PVP/vinyl caprolactam/DMAPA acrylates copolymer, is a suitable commercial product.
Additional suitable polymers include copolymers of two or more different monomers selected from the group consisting of acrylic acid, methacrylic acid and their simple esters, especially C
1
- to C
4
-alkyl esters. At least one mon
Birkel Susanne
Kalbfleisch Axel
Lede Michael
Striker Michael J.
Venkat Jyothsan
Wella AG
LandOfFree
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