Drug – bio-affecting and body treating compositions – Effervescent or pressurized fluid containing – Organic pressurized fluid
Reexamination Certificate
1997-09-09
2002-04-23
Bawa, Raj (Department: 1619)
Drug, bio-affecting and body treating compositions
Effervescent or pressurized fluid containing
Organic pressurized fluid
C424S045000, C424SDIG001, C424SDIG002, C424S070110, C424S070130, C424S070190, C424S070210, C424S070280, C424S070310, C514S880000, C514S944000, C514S945000
Reexamination Certificate
active
06375932
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to a hair cosmetic composition comprising (a) an amine-oxide-containing copolymer and (b) a water-soluble polymer selected from nonionic, cationic, anionic and amphoteric polymers. The composition of the present invention has an excellent hair setting property, and imparts good flexibility and a good finish feeling so that it is useful for applications such as a hair spray, hair mousse, hair setting lotion and hair gel.
BACKGROUND OF THE INVENTION
In order to retain hair in a desired shape, it is a common practice to set hair by applying thereto a solution of a film-forming polymer compound in water or a lower alcohol, or a mixed solvent thereof, and then drying.
Nonionic high-molecular compounds such as polyvinyl pyrrolidone and vinyl pyrrolidone/vinyl acetate copolymer are widely used as the film-forming polymer compounds. Such PVP and PVP/VA copolymers are described in the International Cosmetic Ingredient Dictionary published by The Cosmetic, Toiletry, and Fragrance Association, JP-B-46-19637 (the term “JP-B” as used herein means an “examined published Japanese patent publication”) and JP-A-51-144480 (the term “JP-A” as used herein means an “unexamined published Japanese patent application). However, the use of these compounds is accompanied by the following drawbacks. In order to bring about high hair setting effects, the film formed therefrom is hard and lacks flexibility. This stiffens the hair, and under highly humid conditions causes hair to stick. Thus, the subject compounds do not have sufficient hair setting effects. Use of the above compounds is also accompanied by flaking. That is, a phenomenon where the film thus formed is divided into small flakes by combing after hair setting. Also, due to static charge, the hair spreads and cannot be easily set. Judging from these points, the above-exemplified compounds are unsatisfactory.
The use of anionic polymer compounds as the film-forming polymer compounds is also known. However, the film formed therefrom is hard as a result of increasing the hair setting effects, it stiffens the hair due to lack of flexibility, and the resulting hair setting effects are not satisfactory. In addition, its use is accompanied by flaking, and due to static charge, the hair spreads and cannot easily be set. From these points, the anionic polymer compounds are therefore unsatisfactory. To overcome such problems, there has been an attempt to add a cosmetic additive such as oils and fats or a surfactant. However, this brings about further deterioration in the hair setting effects. Thus, a hair cosmetic composition having a well-balanced performance has not yet been prepared using an anionic polymer compound.
Cationic polymer compounds have also been widely used as the film-forming polymer compound to retain the desired hair shape and to improve the touch feeling upon application of the resulting composition. These compounds, however, are disadvantageous in that they do not have sufficient hair setting effects to retain the desired hair shape, and due to the flexibility of the film thus formed, hair having a retained shape lacks resilience particularly under high humidity conditions. Moreover, when the hair cosmetic composition containing a cationic polymer compound is used repeatedly, the cationic polymer compound accumulates on the hair. This causes build-up problems such as deterioration in the combing property or appearance of the hair. Thus, the cationic polymer compound is unsatisfactory as the film-forming compound.
Amphoteric polymer compounds have also come to be widely used as the film-forming polymer compound (JP-A-49-14647, JP-A-51-9732, JP-A-55-104209, etc.). These compounds are unsatisfactory because they stiffen the hair due to lack of flexibility, are unable to retain the desired shape of the hair particularly under high-humidity conditions and therefore do not provide sufficient hair setting effects, and cannot be sufficiently removed by washing. Thus, the amphoteric polymer compounds are also unsatisfactory as the film-forming compound.
To overcome the above-described problems, particularly, to improve hair setting effects and resilience, JP-A-55-59107 proposes a hair cosmetic composition comprising a cationic polymer compound and an anionic polymer, while JP-A-58-124712 proposes a hair cosmetic composition comprising a cationic polymer compound and an amphoteric polymer.
Even the above compositions do not provide satisfactory performance as a hair setting composition in terms of hair setting effects or resilience.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a hair setting cosmetic composition which overcomes the above-described problems of conventional film-forming polymers such as cationic polymers, anionic polymers, nonionic polymers or amphoteric polymers, which has an excellent hair setting property, and which imparts to hair good resilience and a good finish feeling.
The present inventors found that the above objectives can be obtained by using, as film-forming polymer compounds, a conventional water-soluble polymer compound having a weight-average molecular weight of 5,000 to 500,000 in combination with a novel water-soluble amine-oxide-containing polymer compound, to thereby achieve the present invention.
Thus, the present invention provides a hair cosmetic composition comprising (a) a water-soluble amine-oxide-containing polymer having a weight-average molecular weight of 10,000 to 500,000 and (b) a water-soluble polymer selected from the group consisting of nonionic polymers, cationic polymers, anionic polymers and amphoteric polymers, the weight ratio of said component (a) to said component (b) falling within a range of from 1:10 to 10:1 and said components (a) and (b) being incorporated in a total amount of from 0.1 to 10 wt. % based on the hair cosmetic composition.
In the present invention, the term “water solubility” as used herein means as follows: when an aqueous solution obtained by stirring 1 part by weight of an amine-oxide-containing resin and 99 parts by weight of a deionized water under heat at 60° C. for two hours is uniform even after cooling and being allowed to stand for one day at room temperature; and has, in a 1 cm×1 cm cell, a transmittance of 70% or greater at 655 nm, it is regarded to have water solubility.
The amine-oxide-containing polymer for use as component (a) in the present invention has (a1) a polymer structure composed of an amine-oxide-containing unsaturated monomer or has (a2) a polymer structure composed of an amine-oxide-containing unsaturated monomer and a hydrophobic unsaturated monomer. A copolymer structure composed of 15 to 90 wt. % of an amine-oxide-containing monomer and 85 to 10 wt. % of a hydrophobic monomer is preferred.
The term “the component (a1) having a polymer structure composed of an amine-oxide-containing unsaturated monomer” as used herein includes a polymer which is prepared by any one of the processes (1) to (4) described below, to thereby obtain a polymer comprising structural units containing an amine-oxide group.
Among the processes described below, (2) is preferred for preparing the amine-oxide-containing polymer (a1).
(1) A process of polymerizing an amine-oxide-containing monomer (A) obtained by forming an oxide of a nitrogen-containing monomer.
(2) A process of polymerizing a nitrogen-containing monomer, followed by forming an oxide of the nitrogen-containing group.
(3) A process of polymerizing a monomer having a reaction-active functional group, followed by reacting with a substance containing both a group reactive with the functional group and an amine-oxide group.
(4) A process of polymerizing a monomer having a reaction-active functional group, followed by reacting with a substance containing both a group reactive with the functional group and a nitrogen-containing group, and then forming an oxide of the nitrogen-containing group.
The term “the component (a2) having a copolymer structure composed of an amine-oxide-containing unsaturated monomer and a hyd
Hayama Kazuhide
Hiwatashi Tomoaki
Itou Kayo
Kitani Yasuo
Narazaki Kanji
Bawa Raj
Mitsubishi Chemical Corporation
Sughrue & Mion, PLLC
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