JP2000143461A - Lotion composition - Google Patents

Abstract

(A) A copolymer having a cationic group and a cross-linked structure in a molecule, and a 0.5% by weight hydrogel at 25 ° C. and a shear rate of 1 sec ⁻¹ Viscosity η ₁ ,
The viscosity η _{2 at} a shear rate of 10 sec ⁻¹ is 0.3 ≦ η ₁ ≦
A lotion composition containing 20 (Pa · sec), 0.01 ≦ η ₂ ≦ 5 (Pa · sec), and a copolymer satisfying η ₁ > η ₂ and (B) a water-compatible solvent. [Effect] It has an excellent feel on application to hair and skin and can give a smooth feel after drying.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lotion composition which has an excellent feel on application to hair and skin, and which gives a smooth feel after drying.

[0002]

2. Description of the Related Art In general, a lotion composition contains a water-compatible solvent such as ethanol. However, in a system containing a water-compatible solvent, it is difficult to adjust the viscosity using a polymer or the like. Yes, the coating feel and the dry feel are also poor.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a lotion composition which is excellent in application feeling to hair and skin and gives smooth feeling after drying.

[0004]

According to the present invention, there is provided a copolymer having the following components (A) and (B): 25% by weight hydrogel
° C, shear rate 1 sec ^-1 viscosity η ₁ , shear rate 1
The viscosity η _{2 at} ⁰ sec ⁻¹ is 0.3 ≦ η ₁ ≦ 20 (Pa · se
c), 0.01 ≦ η ₂ ≦ 5 (Pa · sec), and η ₁ > η ₂
(Hereinafter referred to as copolymer (A)) and (B) a lotion composition containing a water-compatible solvent.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The copolymer (A) used in the present invention is such that, for the above η ₁ and η ₂ , 0.3 ≦ η ₁ ≦ 2
0 (Pa · sec), 0.01 ≦ η ₂ ≦ 5 (Pa · sec), and η ₁ > η ₂ . When the viscosity behavior is within this range, application to the hair is easy, a feeling of remaining on the hair is obtained, and the above-mentioned good feeling of use can be obtained. In particular, when the copolymer (A) is 0.4 ≦ η ₁ ≦ 10 (Pa · sec), 0.5
When ≦ η ₂ ≦ 3 (Pa · sec), a more favorable feeling in use is obtained.

Further, the copolymer (A) has a content of 2.0
Weight% ethanol gel, 25 ℃, shear rate 1sec
The viscosity of ^-1 eta _3, viscosity eta ₄ of shear rate 10 sec ^-1,
0.3 ≦ η ₃ ≦ 20 (Pa · sec), 0.01 ≦ η ₄ ≦ 5
When (Pa · sec) and η ₃ > η _4, it is possible to obtain a lotion composition which is excellent in feel and can maintain the feel even when ethanol is used in combination.

A 0.5% by weight hydrogel of the copolymer (A) has a complex elastic modulus ε _{1 at} 25 ° C., a strain frequency of 6.28 rad / sec, a strain of 1%, a loss tangent tan δ ₁ , and a strain of 5 at a strain of 1%.
The complex elastic modulus ε ₂ and the loss tangent tan δ ₂ at 00% are 1 ≦
ε ₁ ≦ 300 (N / m ² ), tan δ ₁ ≦ 2, and 0.
When 01 ≦ ε ₂ ≦ 30 (N / m ² ) and tan δ ₂ ≧ 1, a lotion composition having a more favorable feel can be obtained. Here, the loss tangent of the copolymer (A) is tan δ
_{As 1} ≦ 1.5 and further tan δ ₁ ≦ 1.0,
A lotion composition having a more favorable feel can be obtained.

The measurement of η _{1 to} η ₄ is performed by the following method.
The measurement method is the same for both samples 1 and 2. Specimen 1; a 0.5% by weight hydrogel prepared by adding a powder sample (average particle size of 50 μm or less) to ion-exchanged water and holding at 50 ° C. for half a day. Specimen 2; 2.0% by weight ethanol gel prepared in the same manner as above using ethanol instead of water. Measuring device: Viscometer manufactured by HAAKE, Rotovisco RV-20, Measuring conditions: M10 measuring head, coaxial double cylindrical rotor, measuring temperature 25 ° C., sample volume 15 ml, shear rate: ⁰ sec ⁻¹ to 15 sec in 2 minutes ⁻ Increased to ¹ , Number of measurement points; Measured 60 points over the above share rate range. Calculation method: Calculated from the above measured values using the Rotation Version 2.8 program.

The measurement of δ ₁ , δ ₂ , ε ₁ , ε ₂ is performed by the following method. Sample: Same as Sample 1 above. Measuring device; Fluids Spectrometer RFS-II, manufactured by Rheometrics Co., Ltd. Measurement conditions: Dynamic Strain Sweep (dynamic strain sweep) mode Cone plate: diameter 50 mm, gap 0.05 mm, angle 0. 04 rad, strain frequency 6.2 rad / sec, strain 0.5-500%. Measurement temperature: 25 ° C.

The copolymer (A) having such rheological properties includes, for example, at least one kind of a cationic group-containing vinyl monomer (hereinafter, referred to as monomer (a ₁ )) and a compound represented by the general formula (1): ) Or (2)

[0011]

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Wherein R ¹ represents a hydrogen atom or a methyl group; R ² and R ³ are the same or different and each represents a hydrogen atom or a linear or branched alkyl or alkenyl group having 1 to 4 carbon atoms; Show. ]

[0013]

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[Wherein, R ¹ has the same meaning as described above;
¹ and A ² may be the same or different and have the formula — (CH ₂ ) _n —
6 represents an integer of 6), and B represents -O- or -CH
_2- represents a group. And a crosslinkable vinyl monomer having two or more vinyl groups in the molecule (hereinafter, referred to as monomer (a ₂ )). Hereinafter, a cationic group-containing copolymer (hereinafter, referred to as a copolymer (A ₁ )) obtained by subjecting at least one of the monomers (a ₃ )) to an essential constituent monomer and performing radical polymerization is exemplified. Can be

Among the monomers constituting the copolymer (A ₁ ), the monomer (a ₁ ) includes (meth) acrylic esters or (meth) acrylamides having a dialkylamino group, and (meth) acrylamides. Acroylalkyltrialkyl4
Quaternary ammonium salts, styrenes having a dialkylamino group, vinylpyridines, N-vinyl heterocyclic compounds, acid-neutralized or quaternary ammonium salts of monomers having an amino group, diallyl-type quaternary ammonium salts, etc. No.

Of these monomers (a ₁ ), compounds represented by the general formula (3) or (4) are preferred.

[0017]

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[Wherein, R ¹ has the same meaning as described above;
⁴ and R ⁵ are the same or different and each represent an alkyl group or an alkenyl group having 1 to 4 carbon atoms, R ⁶ represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and Y represents -O-, -NH-. , -CH _2-
Or _{-O-CH 2 CH (OH)} - represents a group, Z is 1 to 4 carbon atoms (provided that Y is -CH ₂ - when the number of 0-3 carbon) represents a linear or branched alkylene group And X represent a conjugate base of an acid, a halogen atom or an alkyl sulfate group having 1 to 4 carbon atoms. ]

[0019]

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Wherein R ⁷ and R ⁸ are the same or different and represent a hydrogen atom or a methyl group, and R ⁹ and R ¹⁰ are the same or different and represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. , X have the same meaning as described above. ]

Preferred acids used for obtaining the salt of the compound (3) or (4) include hydrochloric acid, sulfuric acid, acetic acid, citric acid, succinic acid, adipic acid and sulfamic acid, and quaternary ammonium salts. Preferred quaternizing agents to be obtained include alkyl halides such as methyl chloride and methyl iodide, diethyl sulfate, di-n-propyl sulfate and the like.

Preferred specific examples of the monomer (a ₁ ) include dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, dimethylaminopropyl (meth) acrylamide, and diethylaminopropyl (meth) acrylamide as described in the above (4). Examples include quaternary ammonium salts quaternized with a grading agent, and dimethyldiallylammonium chloride.

As the monomer (a ₂ ), N-methyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide,
N-n-propyl (meth) acrylamide, Nt-butylacrylamide, N- (meth) acryloylmorpholine and the like can be mentioned. Of these, the use feeling is preferable when N, N-disubstituted acrylamide is used, and N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide and the like are particularly preferable.

As the monomer (a ₃ ), (meth) acrylates of polyhydric alcohols or unsaturated alcohols,
Acrylamide, divinyl compounds, polyallyl compounds and the like can be mentioned. Among these, ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, pentaerythritol tetra (meth) acrylate, allyl etherified pentaerythritol, vinyl (meth) acrylate, allyl (meth) acrylate, etc. Particularly preferred.

The preferred mixing ratio of the monomer (a ₁ ) and the monomer (a ₂ ) is 2/98 in a molar ratio of (a ₁ ) / (a ₂ ).
９８98/2, and more preferably 3 / 97-60 /
40. When the molar ratio is small, the thixotropic property is developed, and when the molar ratio is large, the viscosity retention at a low shear rate is facilitated, respectively.

The proportion of the monomer (a ₃ ) is preferably from 0.002 to 5% by weight, particularly preferably from 0.002% by weight to less than 0.1% by weight, based on the total amount of the monomers. When the ratio of the monomer (a ₃ ) is 0.002% by weight or more, the viscosity of the hydrogel formed from the copolymer (A ₁ ) is sufficient. The gel feels soft and slippery.

The copolymer (A ₁ ) comprises at least one of the above-mentioned three types of vinyl monomers which are essential structural units,
Other vinyl monomers copolymerizable therewith can be used as constituents. Other vinyl monomers include, for example, (meth) acrylic acid derivatives such as methyl (meth) acrylate and ethyl (meth) acrylate; anionic group-containing monomers such as acrylic acid and methacrylic acid; N- (3 -Sulfopropyl) -N-acryloyloxyethyl-N, N
Betaines such as -dimethylammonium betaine and N-carboxymethyl-N-methacryloyloxyethyl-N, N-dimethylammonium betaine.

The method for producing the copolymer (A ₁ ) is preferably an aqueous solution polymerization method, a reversed phase suspension polymerization method, a precipitation polymerization method, or the like. For example, when an aqueous solution polymerization method as described in JP-A-4-230250, page 12, column 22, lines 28-34 is used, the polymerization initiation temperature is 20-90 ° C., and the reaction time is 1-1.
It is preferably performed in about 0 hours.

As the polymerization initiator, JP-A-4-2302
No. 50, page 12, column 22, line 46 to page 13, page 23
An azobis compound as shown in column line 18 is used alone or in combination with a reducing agent.

The production of the copolymer (A ₁ ) by an aqueous solution polymerization method is described, for example, in JP-A-53-34101, page 3, upper right column, line 14 to lower right column, line 8; Is used.

One or more copolymers (A) can be used, and 0.01 to 20% by weight, particularly 0.0
It is preferable to mix 2 to 10% by weight, more preferably 0.1 to 5% by weight, from the viewpoint of feel, stability and usability at the time of application.

The water-miscible solvent of the component (B) used in the present invention is not particularly limited as long as it has a solubility in water at 20 ° C. of 5 or more, and examples thereof include lower alcohols, polyhydric alcohols, and glycol ethers. No. Examples of lower alcohols include ethanol, isopropanol, and the like;
For example, ethylene glycol, propylene glycol, isoprene glycol, hexylene glycol, 1,3-
Butylene glycol, diethylene glycol, dipropylene glycol, glycerin, pentaerythritol,
Sorbitol and the like.

Examples of the glycol ether include ethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, and propylene glycol monoethyl ether.

As the water-compatible solvent of the component (B), lower alcohols and polyhydric alcohols are preferable, and ethanol and glycerin are particularly preferable.

One or more water-compatible solvents of the component (B) can be used, and 0.01 to 95% by weight of the total composition.
In particular, it is preferable to add 0.1 to 65% by weight, more preferably 1 to 60% by weight, in view of solubility and stability.

The lotion composition of the present invention contains, in addition to the above essential components, anionic surfactants, amphoteric surfactants, nonionic surfactants, cationic surfactants, and anionic surfactants used in ordinary cosmetics. Functional polymers, nonionic polymers, cationic polymers, ethylene oxide / propylene oxide block copolymers, oils, powders, functional beads / capsules, silicones, metal chelators, antioxidants, ultraviolet absorbers , A humectant, a fragrance and the like can be appropriately compounded.

The lotion composition of the present invention can be produced according to a usual method, and the dosage form is not particularly limited. For example, hair cosmetics such as hair liquid, hair restorer, styling agent, shaving gel; lotion, emulsion, It can be applied as a skin cosmetic such as a deodorant agent.

[0038]

EFFECT OF THE INVENTION The lotion composition of the present invention is easy to adjust the viscosity, is excellent in application feeling to hair and skin, and can give smooth feeling after drying.

[0039]

EXAMPLE Production Example 1 N, N-dimethylaminoethyl methacrylate diethyl sulfate (MOEDES: manufactured by Nitto Chemical Industry Co., Ltd.) was placed in a reaction vessel.
3.85 g, N, N-dimethylacrylamide 71.3
7g, polyethylene glycol dimethacrylate (NK-9
G: manufactured by Shin-Nakamura Chemical Co., Ltd.) 0.0429 g, ion-exchanged water 3
A pre-nitrogen-substituted monomer aqueous solution consisting of 50 g is added,
Nitrogen was further blown in for 20 minutes, and the temperature was raised to 55 ° C. while replacing the inside of the reaction system with nitrogen. Next, the polymerization initiator (2,
0.22 g of 2'-azobis (2-amidinopropane) dihydrochloride) was added. After 30 minutes to 1 hour, it starts to polymerize,
The whole became a soft gel. Continue stirring as it is,
Four hours after the addition of the polymerization initiator, the polymerization was stopped. The mochi-like contents were taken out, washed by stirring in 5 liters of ethanol for 10 minutes, and dried. Thereafter, the mixture was pulverized with a coffee mill and a jet mill, and the pulverized particles were classified with a high volter to obtain a cationic group-containing copolymer No. 1. 1 was obtained.

Production Examples 2 to 14 In the same manner as in Production Example 1 except that the monomers shown in Table 1 were used, the cationic group-containing copolymer No. 1 was prepared. 2-No. 14 were produced.

Test Example 1 The cationic group-containing copolymer obtained in Production Examples 1 to 14 was prepared by adding 0.5% by weight of hydrogel at 25 ° C.
And dynamic viscoelasticity were measured by the above method. Table 1 shows the results.

[0042]

[Table 1]

Example 1 A lotion composition having the composition shown in Table 2 was produced by a conventional method, and the feel at the time of application to hair or skin and the feel after drying were evaluated. The results are shown in Table 2.

(Evaluation method) The evaluation on the hair was carried out for a length of 20 c.
After washing a hair bundle having a weight of 30 g and a weight of 30 g with a shampoo, 1 g of a lotion composition was applied and dried with a dryer for 5 minutes. The evaluation on the skin is 1 g of lotion composition.
Was applied to the inner arm portion and allowed to dry naturally for 30 minutes, and then evaluated. At this time, the feeling at each stage was sensory evaluated by 15 specialized panelists according to the following criteria. The average score was determined, and the results were shown according to the following criteria.

(1) Feeling at the time of application to hair: The feeling of hair at the time of application is very good ... score 4. The hair feels good when it is applied ... Score 3 The feeling of hair at the time of application is somewhat poor ... score 2. The feeling of hair at the time of application is poor ... score 1.

(2) Feeling of Hair after Drying: Slip of hair after drying is very good ... score 4. Good hair slip after drying ... score 3. Slip of the hair after drying is not so good ... Score 2. Slip of hair after drying is not good ... Score 3.

(3) Feeling at the time of application to skin: Slip is very good ... score 4. Good slip ... Score 3. Slip is not so good ... Score 2. Slip is not good ... Score 1.

<Judgment Criteria> Average score 3.5-4.0... Average score 2.5-3.4 ... ○. Average score 1.5-2.4 ... △. Average score 1.0 to 1.4... ×.

(4) Feeling after drying on the skin: Slip is good. Slip is not so good ... Score 2. Sticky ... Score 1

<Judgment Criteria> Average score 2.5 to 3.0... Average score 1.5-2.4 ... △. Average score 1.0 to 1.4... ×.

[0051]

[Table 2]

Examples 2 to 10 Lotion compositions having the compositions shown in Tables 3 and 4 were produced by a conventional method.

[0053]

[Table 3]

[0054]

[Table 4]

Each of the lotion compositions obtained in Examples 2 to 10 was easy to adjust the viscosity, was excellent in the feeling of application to hair and skin, and gave a smooth feeling after drying.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification FI theme coat ゛ (Reference) C08F 220/60 C08F 220/60 C08L 101/02 C08L 101/02 (72) Inventor Satoshi Onizuka Sumida-ku, Tokyo Bunka 2-1-3 Kao Corporation Research Laboratory F-term (reference) 4C083 AB332 AC102 AC302 AC352 AC432 AC692 AC852 AD091 AD092 AD152 AD162 AD532 BB34 CC02 CC31 DD41 EE06 4J002 BC101 BG071 BG131 BJ001 EC036 EC046 EC056 ED026 FD206 GB00J100AL AL63R AL66R AL75R AM17Q AM19Q AM21P AN14P AQ15Q BA08R BA32P CA05 CA23 DA09 JA61

Claims (3)

[Claims] 1. The following components (A) and (B): (A) a copolymer having a cationic group and a crosslinked structure in a molecule, wherein 0.5% by weight of a hydrogel,
° C, shear rate 1 sec ^-1 viscosity η ₁ , shear rate 1
The viscosity η _{2 at} ⁰ sec ⁻¹ is 0.3 ≦ η ₁ ≦ 20 (Pa · se
c), 0.01 ≦ η ₂ ≦ 5 (Pa · sec), and η ₁ > η ₂
And a lotion composition containing (B) a water-compatible solvent. 2. Component (A) is a 2.0% by weight ethanol gel having a viscosity η _{3 at} 25 ° C. and a shear rate of 1 sec ⁻¹ ,
The viscosity η _{4 at} a shear rate of 10 sec ⁻¹ is 0.3 ≦ η ₃ ≦
2. The lotion composition according to claim 1, wherein 20 (Pa · sec), 0.01 ≦ η ₄ ≦ 5 (Pa · sec), and η ₃ > η ₄ . 3. The following components (A) and (B): (A) at least one kind of a cationic group-containing vinyl monomer, and a compound represented by the general formula (1) or (2): [Wherein, R ¹ represents a hydrogen atom or a methyl group, and R ² and R ³ are the same or different and represent a hydrogen atom or a linear or branched alkyl or alkenyl group having 1 to 4 carbon atoms. [Chemical formula 2] [Wherein, R ¹ has the same meaning as described above, and A ¹ and A ² are the same or different and each represents a group represented by the formula-(CH ₂ ) _n- (n represents an integer of 2 to 6). And B represents an —O— or —CH ₂ — group. And at least one kind of a hydrophilic nonionic group-containing vinyl monomer represented by the formula and at least one kind of a crosslinkable vinyl monomer having two or more vinyl groups in a molecule. And a cationic group-containing copolymer obtained by radical polymerization, and (B) a lotion composition containing a water-compatible solvent.