JPH1112152A - Cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cosmetic having excellent softening effects and feeling in use, by including a specific aminopolyether modified silicone compound. SOLUTION: This cosmetic contains an N-polyoxyalkylene aminoalkyl group- containing polyorganosiloxane having an average composition shown by formula I [R<1> is a (substituted) monofunctional hydrocarbon; Z is a group of formula II (R<2> is a bifunctional hydrocarbon; R<3> and R<4> are each a 1-4C bifunctional hydrocarbon; (p) and (q) are each >=50 and <=50 and p+q>2); (a) is >0 and <=1; (b) is 1 and <9 and a+b is >=1.9 and <=2.1] and 500-50,000 molecular weight. The system is further formulated with a high molecular weight siloxane of formula III ((n) is >=3,000 and <=20,000). Preferably the amount of the aminopolyether modified silicone compound formulated is >=1 wt.% and the amount of the high molecular weight siloxane formulated is 0.05-20 wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic having an excellent softening effect and a feeling of use, and more particularly to a cosmetic containing an aminopolyether-modified silicone compound.

[0002]

2. Description of the Related Art Conventionally, cosmetics have been formulated with oils for the purpose of protecting hair and skin, but depending on the nature of the oils, there are disadvantages such as stickiness or greasyness during use. High molecular weight dimethyl siloxane is included for a refreshing feel and its persistence. In recent years, there has been a demand for a soft touch that further suppresses the oiliness, but since high molecular weight dimethylsiloxane cannot satisfy this property, blending of an amino-modified silicone has been studied. The ammonium-modified polymer silicone disclosed in JP-A-5-85918 has insufficient softening effect. In addition, Japanese Patent Application Laid-Open No. 2-27360
No. 9 and JP-A-2-273612 (Amodimethicone, Cosm, USA)
etic Ingredient Dictionary 3rd edition) does not provide a sufficient softening effect, while trimethylsilyl amodimethicone provides a softening effect, but it is difficult to wash off and accumulates, giving rise to stiffness. Improvement was desired.

[0003] Also, especially in hair cosmetics, antistatic,
It is also desirable to have glossiness, good combability, prevention of damage due to heat from a dryer or the like, low irritation to skin and mucous membranes, and prevention of damage to hair such as split ends and cut hair. There has never been a hair cosmetic that satisfies these requirements at the same time.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks and to provide a cosmetic composition which is excellent in softness and feeling of use without oiliness.

[0005]

Means for Solving the Problems The present inventors have made intensive studies to achieve the above object, and as a result, by adding an aminopolyether-modified silicone compound,
It has been found that a cosmetic having an excellent softening effect and a feeling of use can be obtained, and the present invention has been completed.

That is, the cosmetic of the present invention has an average composition formula (I) Za (R ¹ ) bSiO _{[4- (a + b)] / 2} (I) (where R ¹ is substituted or unsubstituted) Wherein Z is represented by the following formula (II):

Embedded image (In the above formula, R ² represents a divalent hydrocarbon group, R ³ and R ⁴ each represent a divalent hydrocarbon group having 1 to 4 carbon atoms, p and q each represent 0 ≦ p ≦ 50, 0 ≦ q ≦ 50
And 2 <(p + q) are integers satisfying a and b
Are 0 <a ≦ 1, 0 <b <2 and 1.9 ≦ (a
+ B) is a number that satisfies ≦ 2.1)
It is characterized by containing from 00 to 500,000 N-polyoxyalkyleneaminoalkyl group-containing polyorganosiloxane. Further, the cosmetic of the present invention comprises the N-
Polyoxyalkyleneaminoalkyl group-containing polyorganosiloxane and the general formula (CH ₃ ) ₃ SiO ((CH ₃ ) ₂ SiO) nSi (CH ₃ ) ₃ (III) (n is 3,000 ≦ n ≦ 20,000) Is included in the formula (1).

In the above formula (I), which is the average compositional formula per siloxane unit of the N-polyoxyalkyleneaminoalkyl group-containing polyorganosiloxane used in the present invention, R ¹ is a substituted or unsubstituted monovalent hydrocarbon. Group, specific examples include methyl, ethyl, propyl,
Alkyl groups such as butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, dodecyl; cycloalkyl groups such as cyclopentyl and cyclohexyl;
Aralkyl groups such as -phenylethyl and 2-phenylpropyl; aryl groups such as phenyl and tolyl; substituted hydrocarbon groups such as chloromethyl, chlorophenyl, 3,3,3-trifluoropropyl and cyanoethyl; These substituents may be used alone or in combination of two or more in the same molecule.

Among these, an alkyl group having 1 to 4 carbon atoms is preferable, and a methyl group is particularly preferable, because the raw materials are easily available and synthesized, and the properties of the obtained cosmetic are good.

In the average composition formula (I), Z is

Embedded image Is an aminoalkyl group in which more than two oxyalkylene groups are bonded to a nitrogen atom. Where R ² is 2
Is a monovalent hydrocarbon group.
It is preferable to form a carbon chain consisting of three or more carbon atoms between the silicon atom and the nitrogen atom, and specifically,-(C
_{H 2) 3 -, - (} CH 2) 4 -, - (CH 2) 5 -, -
_{(CH 2) 2 CH (CH} 3) - , etc. are exemplified. R ³ and R ⁴ are each a divalent hydrocarbon group having 1 to 4 carbon atoms, and specifically, —CH ₂ — and — (CH
_{2) 2 -, - (CH} 2) 4 -, - CH 2 CH (CH 3)
—, —CH ₂ CH (C ₂ H ₅ ) — and the like, and one or two or more of them may be present in the same polyoxyalkylene chain. Because of the good properties of inter alia resulting cosmetics, - (CH _{2) 2} - or -CH ₂ CH (CH
₃ )-is preferred. p and q each represent the number of oxyalkylene units, and 0 ≦ p ≦ 50 and 0
≦ q <50, preferably 1 ≦ p ≦ 50, 1 ≦ q ≦ 50,
And 2 <(p + q), preferably 2 <(p + q) ≦ 5
0, more preferably an integer satisfying 2 <(p + q) ≦ 20. When p + q is 2 or less, improvement in oiliness becomes insufficient due to insufficient hydrophilicity. Also, as p + q increases, the amine content decreases. Therefore, in order to maintain the flexibility of the cosmetic of the present invention, it is preferable that p + q is 50 or less so as to secure a sufficient amine content. Z
Examples thereof include a group represented by the following formula.

[0010]

Embedded image In the average composition formula (I), a and b are each 0
<A ≦ 1 and 0 <b <2, preferably 0 <a ≦ 0.5 and 1.5 <b <2. When a is larger than 1, flexibility becomes insufficient, and when b is 2 or more, compounding becomes difficult. Furthermore, the N-polyoxyalkyleneaminoalkyl group-containing polyorganosiloxane used in the present invention is substantially linear or partially branched, and a + b is from 1.9 to 2.1. Range.

The polysiloxane has a molecular weight of from 500 to 500,000, preferably from 10,000 to 100,
000. If it is less than 500, it is difficult to obtain good characteristics, and if it is more than 500,000, handling becomes inconvenient.

The viscosity of the polysiloxane is 10 cP
To 1,000,000 cP, preferably 100 cP to 100,000 cP. If it is less than 10 cP, it is difficult to obtain good characteristics, and if it is more than 1,000,000 cP, handling becomes inconvenient.

[0013] Such N- polyoxyalkylene aminoalkyl group-containing polyorganosiloxane, for example, the average composition formula ^{_{(IV) H a (R 1}} ) b SiO [4- (a + b)] / 2 ...... (IV (Wherein R ¹ , a and b are the same as those described above), and for example, a compound represented by the general formula (V)

Embedded image (Wherein, R ⁵ represents a divalent hydrocarbon group, and R ³ , R ⁴ ,
p and q are the same as those described above) and hydrosilylation using an addition reaction catalyst such as platinum or a platinum compound with the N-polyoxyalkylenealkenylamine represented by the formula (1).

The polyorganohydrogensiloxane having the average composition formula of the above formula (IV) has Si in the molecule.
Is a silicone containing an —H bond, and the backbone of the polysiloxane may be linear, branched, or cyclic, and the position of the Si—H bond may be either at the terminal of the molecular chain or at an intermediate siloxane unit. Is also good.

The following are typical examples of such polyorganohydrogensiloxanes wherein R ¹ is a methyl group.

[0016]

Embedded image (Wherein c and d are 0 ≦ c ≦ 1,000 and 0 ≦ d ≦ 1,000, respectively, and 20 ≦ (c +
d) is an integer satisfying ≦ 1,000) The above formula may be a random copolymer, and does not necessarily mean a block copolymer.

[0017]

Embedded image (Where e and f are 0 ≦ e ≦ 1,000 and 0 ≦ f ≦ 1,000, respectively, and 20 ≦ (e +
f) is an integer satisfying ≦ 1,000) The above formula may be a random copolymer, and does not necessarily mean a block copolymer.

[0018]

Embedded image (Where g is an integer satisfying 6 ≦ g ≦ 1,000)

Embedded image (Where h is an integer satisfying 3 ≦ h ≦ 1,000)
and

Embedded image (Where i and j are 1 ≦ i ≦ 10 and 0, respectively)
.Ltoreq.j.ltoreq.10 and an integer satisfying 3.ltoreq. (I + j) .ltoreq.10) Note that the above formula may be a random copolymer, and does not necessarily mean a block copolymer.

These polyorganohydrogensiloxanes can be synthesized according to known methods.
For example, chlorosilanes having a Si-H bond such as methyldichlorosilane, dimethylchlorosilane, and diethylchlorosilane, or corresponding alkoxysilanes may be used, if necessary, according to the molecular design of the target substance, such as trimethylchlorosilane and phenyltrichlorosilane. Si
It can be obtained by co-hydrolysis with chlorosilanes containing no -H bond, or corresponding alkoxysilanes or alkyl silicates. Alternatively, a cyclic siloxane compound such as tetramethylcyclotetrasiloxane or octamethylcyclotetrasiloxane,
It can also be obtained by mixing disiloxanes such as tetramethyldisiloxane or hexamethyldisiloxane according to a desired average composition formula, and polymerizing and equilibrating in the presence of an acid catalyst.

In N-polyoxyalkylenealkenylamine (V), R ⁵ represents a divalent hydrocarbon group. CH
₂ = CH—R ₅ — undergoes an addition reaction with the polyalkylhydrogensiloxane to form a divalent hydrocarbon group R ² in the formula (II).

The compound (V) can be synthesized by a known method. For example, it can be easily obtained by performing a ring-opening addition polymerization reaction of a predetermined amount of alkylene oxide using alkenylamine as a reaction initiator. Examples of the alkenylamine include allylamine, butenylamine, and octenylamine. Examples of the alkylene oxide include ethylene oxide, propylene oxide, butylene oxide, and tetrahydrofuran. These alkylene oxides may be used alone or in combination of two or more to form a copolymer. The copolymer may be a random copolymer or a block copolymer. The compound thus obtained is mostly composed of a tertiary amine, and in some cases contains a secondary amine and a primary amine as a raw material, but the primary amine is used in the subsequent step. Since it becomes a factor inhibiting the hydrosilylation of the reaction, it is preferable to reduce the amount as much as possible by controlling the reaction conditions and performing a separation operation.

P representing the number of moles of alkylene oxide added
And q are, as described above, 0 ≦ p ≦ 50 and 0 ≦ q
≦ 50, preferably 1 ≦ p ≦ 50, 1 ≦ q ≦ 50, and an integer satisfying 2 <(p + q).

The above reaction is carried out under pressure or normal pressure, depending on the properties of the alkylene oxide. Although the reaction proceeds without a catalyst, a catalyst can be used to promote the reaction. As a reaction catalyst, an alkali catalyst such as sodium hydroxide or potassium hydroxide can be used.
When a catalyst is used, an acid is used as a neutralizing agent,
In this case, it is preferable to neutralize with a weak acid such as phosphoric acid or acetic acid.

An N-polyoxyalkyleneaminoalkyl group-containing compound used in the present invention by a hydrosilylation reaction between a polyorganohydrogensiloxane having a structural unit of the formula (IV) and N-polyoxyalkylenealkenylamine (V). The method for synthesizing the polyorganosiloxane will be described below.

As the catalyst for the hydrosilylation reaction, platinum group metals such as platinum, palladium, rhodium and the like or compounds thereof are used, and in particular, platinum compounds are generally used. Examples of the platinum catalyst include a platinum-supported catalyst such as platinum black, platinum carbon or platinum alumina; a platinum complex compound such as a solution of chloroplatinic acid in isopropanol, a platinum octanol complex or a complex of platinum and vinyl siloxanes; or a platinum colloid. Is done. The amount of the catalyst is 0.1 to 1,000 ppm in terms of platinum atom, and is preferably used in the range of 1 to 500 ppm. 0.1pp
If it is less than m, the reaction is slow and industrially disadvantageous, and if it is more than 1,000 ppm, no such effect is obtained, and the platinum compound is expensive and economically disadvantageous.

This reaction can be carried out without solvent,
A suitable solvent may be used to improve the reactivity.
Examples of such a solvent include hydrocarbons such as toluene and xylene; and alcohols such as isopropanol. The reaction is carried out under appropriate heating conditions, and the temperature is preferably set in the range of 60 to 120 ° C.
If the temperature is lower than 60 ° C., the progress of the reaction is slow and disadvantageous. If the temperature is higher than 120 ° C., side reactions such as thermal deterioration of the polyether portion may occur, which is not preferable.
Usually, since the reaction can be easily controlled, a method of dropping N-polyoxyalkylenealkenylamine or polyorganohydrogensiloxane is used, but the reaction is carried out in a state where all the materials are mixed from the beginning using a weakly active catalyst. You can also start. Reaction 3
By stirring for 20 hours. From the viewpoint of storage stability of the obtained compound and the like, a treatment step of generally reacting the remaining Si—H bond with an alcohol or an unsaturated hydrocarbon may be included. Also Si
In order not to leave a -H bond, the alkenyl group is replaced with Si-
The reaction is preferably carried out in an excess of about 1.3 times the molar amount of H bonds.

Isolation and purification can be performed by a generally known method. For example, after completion of the reaction, the solvent, low-boiling components, unreacted substances and the like are removed by distillation, and then a purification step such as filtration is performed for the purpose of removing the catalyst.

As described above, a feature of the present invention is that the molecular structure can be easily controlled. Therefore, it is easy to maintain the dispersion stability of the system and to control the viscosity.

The amount of the aminopolyether-modified silicone compound of the present invention in a cosmetic is not particularly limited, but is preferably 0.1% by weight or more in order to obtain good flexibility. However, considering the feeling on the skin, the amino content of the final product is 30% by weight.
The following is preferable, and it is particularly preferable to add 0.5 to 10% by weight.

In the cosmetic of the present invention, in particular, the general formula (III) (CH ₃ ) ₃ SiO ((CH ₃ ) ₂ SiO) nSi (CH ₃ ) ₃ (III) (n is 3,000 ≦ n) ≦ 20,000) is preferably used in combination. When used in combination to prepare and use hair cosmetics, it gives not only the effect of preventing and repairing hair damage such as split ends and cut hairs, but also a more flexible effect such as better smoothness on hair can do. Since a cosmetic having good properties can be obtained, the average degree of polymerization n is particularly 4,000 to
10,000 is preferred.

When the high molecular weight siloxane of the general formula (III) is used in combination, it is preferable that the compounding amount in the cosmetic is 0.05 to 20% by weight, particularly 0.1 to 10% by weight.

The cosmetics in the present invention include not only hair cosmetics, skin cosmetics and make-up cosmetics but also all products whose feel is a problem in use such as sunscreen cosmetics and quasi-drugs. Is what you do. Specific applications include shampoo, rinse, hair cream, hair oil,
Examples include hair lotions, coloring agents, liquid or solid pomades, tics, shaving foams, skin creams, shaving creams, skin lotions and the like. The dosage form is not limited to a liquid form, but may be a powder, an emulsion, a cake, or the like, depending on the intended use, and the form is not limited. The hair in the hair cosmetics includes not only head hair but also other human hair, artificial hair such as a wig, animal hair, and the like.

In preparing the cosmetic of the present invention, in addition to the above-mentioned essential components, components used as ordinary raw materials for cosmetics or quasi-drugs may be used as long as the effects of the present invention are not impaired depending on the purpose. They can be appropriately blended. As these components, for example, liquid paraffin, squalane, lanolin derivatives, higher alcohols, various ester oils, avocado oil, palm oil, tallow, jojoba oil, silicone oil, polyalkylene glycol polyether and its carboxylic acid oligoester compound, terpene Oils such as hydrocarbon oils; ethylene glycol, propylene glycol, 1,
3-butylene glycol, glycerin, sorbitol,
Moisturizing agents such as water-soluble polyhydric alcohols such as polyethylene glycol, hyaluronic acid, chondroitin sulfate, and pyrrolidone carboxylate; ultraviolet absorbers; ultraviolet scattering agents; resins such as acrylic resins, silicone resins, and polyvinylpyrrolidone; Proteins or protein degradants such as gelatin, collagen, silk fibroin, elastin; preservatives such as ethyl paraben, butyl paraben; activators such as various amino acids, biotin, pantothenic acid derivatives; γ-oryzanol, dextran sodium sulfate, vitamin E derivatives , Nicotinic acid derivatives and other blood circulation promoters; antiseborrheic agents such as sulfur and thiantole; diluents such as ethanol, isopropanol, tetrachlorodifluoroethane, normal paraffin, isoparaffin, and cyclic or linear volatile silicones; Agents; perfumes; colorant; thickeners such sheet vinyl polymers silica powder, talc powder, polyethylene resin powder, silicone rubber powder, silicone resin powder, various powders such as benzoguanamine resin powder.

[0034]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to examples and comparative examples. The present invention is not limited by this. Parts are by weight and the amounts are by weight. Prior to the examples, synthetic examples of the aminopolyether-modified silicone compound used in the present invention will be described. The viscosity and other physical properties are values measured at 25 ° C. The following three types of polymethylhydrogensiloxane were used.

MD ^H ₄ D ₄₀ M (viscosity 40 centipoise) S-1 MD ^H ₉ D ₄₅₀ M (viscosity 3,300 centipoise) S-2 MD ^H ₁₂ D ₆₀₀ M (viscosity 6,300 centipoise) ... S-3 M is (CH ₃ ) ₃ SiO _1/2 , ^DH is H (CH ₃ ) Si
O and D each represent a siloxy unit of (CH ₃ ) ₂ SiO.

The compound P-1 represented by the following formula (molecular weight: 347, total amine value) obtained by adding 5 mol of propylene oxide per mol of allylamine using allylamine as an initiator as N-polyoxyalkylenealkenylamine. 162, tertiary amine value 163).

[0037]

Embedded image Preparation of N-polyoxyalkyleneaminoalkyl group-containing polyorganosiloxane (A-1, A-2, A-3) [A-1] In a four-necked flask equipped with a reflux condenser, a stirrer, and a dropping funnel, 165 parts of S-1 and 190 parts of toluene were charged and heated to 100 ° C. under a nitrogen stream.
Next, a mixture of 88 parts of P-1 and 0.5 part of a chloroplatinic acid isopropanol solution (platinum element content: 1%) was dropped from the dropping funnel over 30 minutes. Heat generation was observed with the dropwise addition, and the liquid temperature was raised to 105 ° C. The stirring was continued for 5 hours, and Si-H was analyzed by infrared absorption spectrum analysis.
It was confirmed that the absorption of the bond (2140 cm ^-1 ) had disappeared. Next, the mixture was kept at 120 ° C. and 5 mmHg for 1 hour to completely remove toluene and other low-boiling components. After cooling, the mixture was filtered to obtain a pale yellow transparent liquid, Compound A-1.

Table 1 shows the measured values of the viscosity, specific gravity, refractive index, amine equivalent and number average molecular weight of A-1. From these results and infrared absorption spectrum analysis, it was confirmed that A-1 was an N-polyoxypropyleneaminopropyl group-containing polymethylsiloxane represented by the following structural formula (VI).

MD ^Z ₄ D ₄₀ M (VI) where M and D are as described above, and D ^Z is Z (CH
3) represents an SiO unit, and Z is a group represented by the following formula.

[0040]

Embedded image Here, the amine equivalent and the number average molecular weight were measured by the following methods.

Amine Equivalent: A sample was dissolved in isopropanol and titrated with perchloric acid using tetrabromophenolphthalein ethyl ester potassium salt as an indicator to determine the amine equivalent.

Number average molecular weight: Measured by high performance liquid chromatography.

[A-2] S-2 is replaced by 22 instead of S-1
Compound A-2 was obtained by the same preparation method as A-1 except that 0 part was used. The properties of A-2 were measured in the same manner as A-1. Table 1 shows the results. From these results, A-
2 was confirmed to be an N-polyoxypropyleneaminopropyl group-containing polymethylsiloxane represented by the following structural formula (VII). In addition, M, D, and ^DZ are A-
Same as 1.

MD ^Z ₉ D ₄₅₀ M (VII) [A-3] Compound A-3 was prepared in the same manner as in A-1 except that 229 parts of S-3 was used instead of S-1. Obtained. The properties of A-3 were measured in the same manner as A-1. Table 1 shows the results. From these results, it was confirmed that A-3 was an N-polyoxypropyleneaminopropyl group-containing polymethylsiloxane represented by the following structural formula (VII). In addition, M, D, and ^DZ are the same as A-1.

MD ^Z ₁₂ D ₆₀₀ M (VIII)

[Table 1] Examples 1-3, Comparative Examples 1-5 Each of 4 parts of the organopolysiloxane of the present invention, 16 parts of ethanol and LPG80
The part was filled in an aerosol type spray can. As a comparative example, a polysiloxane mixture having the following composition

Embedded image An amino-modified polysiloxane represented by the following formula,

Embedded image A polyether-modified polysiloxane represented by the following formula,

Embedded image Linear dimethylsiloxane (350 cSt) and organopolysiloxane (I) represented by the following formula

Embedded image Was prepared using These are sprayed evenly on hair of about 25 cm in length of a panel of 10 healthy Japanese women of 20 to 40 years old, and have flexibility, smoothness,
The sensory evaluation was performed for the moist feeling. The sensory evaluation is indicated by the average score of panelists' evaluation. In addition, each panelist evaluated 3 as good, 2 as normal, and 1 as bad.

Four parts of each of the siloxanes of Examples and Comparative Examples of the present invention were dissolved and dispersed in 96 parts of normal heptane. A bundle of 20 g of hair was immersed in each bath for 30 minutes, pulled up, and dried with a hair drier after dripping of the solution stopped. Next, the hair tress was lightly rubbed in 2 liters of a 0.1% by weight aqueous solution of potassium soap for baby adjusted to 45 ° C. for 15 minutes, then washed with water and dried. This shampoo was repeated three times. The amount of the organopolysiloxane before and after the hair was washed was measured using a fluorescent X-ray apparatus (manufactured by Rigaku Denki Kogyo Co., Ltd.). It is shown as a siloxane residual ratio. In addition, the hair after washing was subjected to a sensory evaluation of stiffness by finger touch. As described above, 3 was good, 2 was normal, and 1 was bad.

Table 2 shows the above results.

[0048]

[Table 2] [Examples 4 to 7 and Comparative Examples 6 to 9] Hair foams, shampoos, rinses and treatments were prepared with compositions as shown in Table 3, respectively. The general formula of the high molecular weight dimethylsiloxane used in Examples 4 and 7 is represented by (CH ₃ ) ₃ SiO ((CH ₃ ) ₂ SiO) nSi (CH ₃ ) ₃ ... (III). A panel of 10 healthy Japanese women aged 20 to 40 years old was used uniformly on hair having a length of about 25 cm, and suppleness, smoothness, and moist feeling were evaluated organoleptically. The sensory evaluation is indicated by the average score of the panel evaluation. In addition, each panelist evaluated 3 as good, 2 as normal, and 1 as bad. After treating the hair with these compositions,
Further, the hair was washed with a commercially available shampoo, and after repeating this cycle five times, the stiffness of the dried hair was subjected to a sensory evaluation. As described above, 3 was good, 2 was normal, and 1 was bad.

[0049]

[Table 3] Table 4 shows the above results.

[0050]

[Table 4] From the results in Tables 2 and 4, Comparative Examples 1, 3, and 4 show that
Suppleness, smoothness,
It was inferior to the moist feeling, and in particular, stickiness was felt in Comparative Example 4. In Comparative Examples 2 and 5, although the softening effect was good, it was found that the silicone residual ratio was high and improvement in the stiffness could not be expected. Further, Comparative Examples 6, 8 and 9 also have a good softening effect, but have a stiff feeling after shampooing, while Comparative Example 7 has no stiffness but is inferior in softness and sticky. It did not satisfy the feeling of use at the same time. On the other hand, the cosmetics of Examples 1 to 3 are excellent in the softening effect and at the same time have no sticky feeling, have a low silicone residual ratio, and can be expected to improve the stiffness. It was found to be excellent in the softening effect and also excellent in the feeling of use without stiffness after washing the hair.

[0051]

As described above, according to the present invention, an excellent cosmetic having both contradictory properties of softness and non-stickiness has been realized. In particular, when the present invention is applied to a hair cosmetic, the hair is prevented from being damaged by heat, the squealing and looseness of the hair are suppressed, the hair is given a luster, the combing is good, the static electricity is not generated, and a more excellent softening effect is obtained. The hair cosmetic composition has an excellent feeling of use without stiffness and is less irritating to skin and mucous membranes.

[0052]

Continued on the front page (51) Int.Cl. ⁶ Identification code FI C08L 83/08 C08L 83/08

Claims (2)

[Claims] 1. Average composition formula (I) Za (R ¹ ) bSiO _{[4- (a + b)] / 2} (I) (wherein R ¹ is a substituted or unsubstituted monovalent hydrocarbon group) Wherein Z is represented by the following formula (II): (In the above formula, R ² represents a divalent hydrocarbon group, R ³ and R ⁴ each represent a divalent hydrocarbon group having 1 to 4 carbon atoms, p and q each represent 0 ≦ p ≦ 50, 0 ≦ q ≦ 50
And 2 <(p + q) are integers satisfying a and b
Are 0 <a ≦ 1, 0 <b <2 and 1.9 ≦ (a
+ B) is a number that satisfies ≦ 2.1)
A cosmetic comprising from 00 to 500,000 N-polyoxyalkyleneaminoalkyl group-containing polyorganosiloxane. 2. The polyorganosiloxane containing an N-polyoxyalkyleneaminoalkyl group and a compound represented by the general formula (CH ₃ ) ₃ SiO ((CH ₃ ) ₂ SiO) nSi (CH ₃ ) ₃ (n) The cosmetic according to claim 1, wherein the cosmetic contains a high-molecular-weight siloxane represented by the following formula: