Hair cuticle caring method

Details Hair cuticle caring method Hair cuticle caring method

1998-12-07

2001-01-16

Page, Thurman K. (Department: 1615)

Drug, bio-affecting and body treating compositions

Live hair or scalp treating compositions

Cationic surfactant containing

C424S070100, C424S070270

Reexamination Certificate

active

06174523

ABSTRACT:

TECHNICAL FIELD
The present invention relates to a hair cuticle caring method which suppresses peeling of hair cuticles.
BACKGROUND ART
A cationic surfactant is a component indispensable for improving touch feeling of hair, but it sometimes causes a peeling phenomenon (which will hereinafter be called “lift-up”) of hair cuticles, thereby damaging the surface of the hair and decreasing a gloss thereon.
An object of the present invention is to provide a hair cuticle caring method for suppressing the lift-up of hair cuticles.
DISCLOSURE OF THE INVENTION
In the present invention, there is thus provided a hair cuticle caring method comprising treating hair with a composition which contains (A) a cationic surfactant and (B) an organic acid or salt thereof in combination to give, when an aqueous solution containing 1 mM of each of said components is formed, 40 mN/m or less as the surface tension of said aqueous solution at 27±0.5° C.
According to the process of the present invention, the lift-up of hair cuticles can be suppressed and moreover, the volume of hair can be enhanced softly without hardening the hair. The present invention therefore provides a method for enhancing the volume of hair, which comprises treating the hair with the above-described composition. In addition, the process of the present invention makes hair free from oiliness and provides the hair with moisturized but stickiness-free feeling and styling ease.
BEST MODES FOR CARRYING OUT THE INVENTION
Examples of the cationic surfactant to be used as the component (A) in the present invention includes quaternary ammonium salts each represented by the following formula (1):
wherein at least one of R
1
, R
2
, R
3
and R
4
represents an alkyl or alkenyl group which may be substituted by an alkoxy, alkenyloxy, alkanoylamino or alkenoylamino group having 8 to 35 carbon atoms in total or an aliphatic acyloxy(polyethoxy)ethyl group; the other one(s) each represents a benzyl group, a C
1-5
alkyl or hydroxyalkyl group or a polyoxyethylene group in which the number of moles added is not greater than 10 in total; and Z
−
represents a halogen ion or organic anion.
Among the above-described cationic surfactants, preferred examples include distearyldimethylammonium chloride, stearyltrimethylammonium chloride, capryltrimethylammonium chloride, myristyltrimethylammonium chloride, cetyltrimethylammonium chloride, behenyltrimethylammonium chloride, lauryltrimethylammonium chloride, N-stearyl-N,N,N-tri(polyoxyethylene)ammonium chloride (addition of 3 moles in total), cetylbenzyldimethylammonium chloride, cetyltriethylammonium bromide and distearyldimethylammonium chloride and in addition, branched quaternary ammonium salts represented by the below-described formula (2) and (3), respectively and quaternary ammonium salts represented by the below-described formula (4).
[wherein R
5
represents a mixture of (A) a branched alkyl group represented by formula:
in which R
11
represents a methyl or ethyl group, c stands for an integer to give the number of carbon atoms 8 to 16 in total) and (B) a linear alkyl group represented by the formula: CH
3
—(CH
2
)
d
— (in which d stands for an integer of 7 to 15), the branching ratio of (A)/(A)+(B) being 10 to 100 mole %; R
6
and R
7
each represents a benzyl group, a C
1-3
alkyl group or a hydroxyalkyl group; R
8
and R
9
each represents a C
2-12
alkyl group, R
10
represents a group
or a C
1-3
alkyl group, and Z
−
represents a halogen ion or an organic anion.
wherein R
12
and R
13
each represents a C
8-22
alkyl or alkenyl group which may be substituted by a hydroxyl group, R
14
and R
15
each represents a C
1-3
alkyl group or a group —(CH
2
CH
2
O)
g
H (in which g stands for 1 to 6), e and f each stands for 0 to 5 and Z
−
represents a halogen ion or an organic anion.
Incidentally, specific examples of Z
−
which is a counter ion of these quaternary ammonium salts include halogen ions such as chlorine, iodine and bromine; and organic anions such as methosulfate, ethosulfate, methophosphate and ethophosphate. Anions of the organic acid as the component (B) may also be employed.
Among them, the branched quaternary ammonium salt represented by the formula (2) is ordinarily synthesized, for example, with a C
8-16
oxoalcohol as a raw material. Examples include dialkyldimethylammonium salts, dialkylmethylhydroxyethylammonium salts and dialkylmethylbenzylammonium salts containing an alkyl group introduced from an oxoalcohol.
In the present invention, the branching ratio of R
5
in the formula (2) is ordinarily 10 to 100 mole %, with 10 to 50 mole % being particularly preferred. The number of the carbon atoms of R
5
in total is 8 to 16. R
5
is preferred to have a predetermined distribution of carbon atoms and that having the following distribution is particularly preferred:
C
8
to C
11
: 5 mole % or less
C
12
: 10 to 35 mole %
C
13
: 15 to 40 mole %
C
14
: 20 to 45 mole %
C
15
: 5 to 30 mole %
C
16
: 5 mole % or less
Specific examples of such a branched quaternary ammonium salt include dialkyldimethylammonium chloride which contains a C
8-16
alkyl group having a branching ratio of 10 to 50 mole %.
The branched quaternary ammonium salt represented by the formula (3) is obtained by the synthesis using as a raw material a C
8-28
Guerbet alcohol represented by the formula:
Preferred examples of the branched quaternary ammonium salt include alkyl trimethylammonium salt, alkyl dimethylbenzylammonium salt, dialkyl dimethylammonium salt, dialkyl methylhydroxyethylammonium salt and dialkyl methylbenzylammonium salt, each having an alkyl group introduced from a Guerbet alcohol. Among them, particularly preferred are 2-dodecyltetradecyl trimethylammonium chloride, 2-dodecylhexadecyl trimethylammonium chloride, di-2-hexyldecyl dimethylammonium chloride and di-2-octyldodecyldimethylammonium chloride.
Examples of the quaternary ammonium salt represented by the formula (4) include those as described in WO93/10748, WO92/06899 and WO94/16677. Particularly, those of the formula (4) wherein R
12
and R
13
each represents an oleyl group or a C
12-18
alkyl group, R
14
represents a methyl group, R
15
represents a —CH
2
CH
2
OH group and e and f each stands for 0 are preferred.
As the component (A), at least one cationic surfactant can be used. It is preferably added in an amount of 0.01 to 20 wt. % based on the total composition. An amount of 0.1 to 10 wt. %, particularly 0.5 to 5 wt. % is preferred, because sufficient hair cuticle caring effects can be brought about and in addition, good feeling upon use and volume enhancing effects can be attained at such an amount.
Examples of the organic acid to be used as the component (B) in the present invention include carboxylic acids, sulfonic acids and phosphoric acid, more specifically, aromatic carboxylic acids such as salicylic acid and aromatic sulfonic acids such as 1-naphthalenesulfonic acid, 2-naphthalensulfonic acid, oxybenzonesulfonic acid and guaiazulenesulfonic acid.
Examples of the salt of an organic acid include alkali metal salts such as sodium and potassium and alkaline earth metal salts of calcium and magnesium.
As the component (B), sodium 1-naphthalenesulfonate, sodium 2-naphthalenesulfonate, sodium guaiazulenesulfonate, oxybenzonesulfonic acid and salicylic acid are preferred, with sodium 2-naphthalenesulfonate being particularly preferred.
Accordingly, the present invention further provides a hair cosmetic composition which comprises (A) a cationic surfactant and (B) at least one substance selected from the group consisting of 1-naphthalenesulfonic acid, 2-naphthalenesulfonic acid, guaiazulenesulfonic acid, oxybenzonesulfonic acid and salicylic acid and salts thereof. As the component (B), at least one organic acid or salt thereof can be used. Addition of it in an amount of 0.01 to 10 wt. %, particularly 0.05 to 5 wt. %, more particularly 0.1 to 3 wt. % based on the total composition is preferred because sufficient hair cuticle caring effects are brought about.
The component (B) may be added t

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