KR101135051B1 - Clear Hair Gel Compositions - Google Patents

Abstract

The present invention relates to a transparent type hair gel composition, which is represented by Chemical Formula 1 based on the total weight of the composition, having a mass average molecular weight of 5,000 to 100,000, a viscosity (20 ° C) of 5,000 to 55,000 cps, a melting point (Tm) of 110 to 290 ° C. 0.1 to 10% by weight of methacryloylethylbetaine methacrylate copolymer having physical properties and having a degree of protonation of 40 to 95%; 0.01 to 5 wt% acrylate / C10-30 alkyl acrylate crosspolymer; and 0.01 to 10 wt% neutralizing agent. The hair gel composition according to the present invention is not only excellent in the fixing force of the hair while maintaining the transparent properties, but also less stickiness in the hands and hair.

Description

Clear Hair Gel Compositions

The present invention relates to a hair gel composition.

Humans have a desire to keep their hair in various forms. In order to satisfy this desire, permanent and temporary deformation of hair has been attempted.

In order to permanently deform the hair, a method using a chemical raw material that reacts with the hair is mainly used. In addition, hair styling products such as aerosol or pump type sprays and mousses and gels containing various resins or rubbers are used for temporary deformation of the hair. The temporary holding force exerted on the hair with such a product is a temporary arrangement that can be released by water or by hair.

Among these hair styling products, hair gel is widely used because it is not only easy to prepare the hair or make a desired hair shape but also has a function of maintaining the shape of the hair. Apply it to your hair, then use a comb, brush, or finger to shape your hair.

In general, in order to increase the set hold of the hair gel, it is most important to select a setting agent (fixing agent) and to use an optimal content. Usually, PVP / VA copolymer and PVP / dimethylaminoethyl methacrylate copolymer are used. Nonionic or cationic polymers such as these are used. However, these setting agents have a problem in that there is a limit in increasing the set force even if the amount of use increases due to the unique characteristics of each.

Amphoteric polymers, such as methacryloylethylbetaine methacrylate polymer compositions with high set hold capability, have been applied to hair gels to address this problem and improve hair set force.

However, amphoteric polymers, such as methacryloylethylbetaine methacrylate polymers, generally have poor compatibility with the thickeners included in the composition, so when used as a setting agent for hair gels the composition is not made transparent but is suspended in white. Since it has a condensed appearance, the hair becomes dirty and the feeling of inferiority, such as white powder is left when applied to the hair, a person using a conventional hair gel has a problem that reluctance to use such an opaque hair gel.

In addition, in general, since the hair gel is applied to the hair while being applied to the hair while being used as a viscous formulation, the hair has a disadvantage in that it is inconvenient to use due to the stickiness remaining in the hair.

Therefore, the technical problem to be achieved by the present invention is to solve the above problems, to maintain a transparent property of the hair, but also excellent in the fixing force, and less stickiness in the hands and hair to provide a convenient hair gel composition to use The purpose is.

In order to solve the above technical problem, the present invention is represented by the following formula 1, based on the total weight of the composition, the mass average molecular weight 5,000 ~ 100,000, viscosity (20 ℃) 5,000 ~ 55,000cps , melting point (Tm) 110 ~ 290 0.1 to 10% by weight of methacryloylethylbetaine methacrylate copolymer having physical properties of ℃ and having a degree of protonation of 40 to 95%; 0.01 to 5% by weight of acrylate / C 10-30 alkyl acrylate crosspolymer; and 0.01 to 10% by weight of a neutralizing agent.

In Formula 1, a, b, c, d, and e are molar ratios for each monomer unit, and a + b + c + d + e = 1.

At this time, the acrylate / C10-30 alkyl acrylate crosspolymer preferably contains 0.01 to 60% by weight of a hydrophobic monomer unit, and the neutralizing agent is triethanolamine, potassium hydroxide, aminomethyl propanol (AMP-95), It is preferable to use sodium hydroxide, ammonium hydroxide and the like independently or in combination.

Hereinafter, the hair gel composition according to the present invention will be described in detail.

Prior to this, it is noted herein that the weight percentages for the various polymers are weight percentages for solids unless otherwise specified.

The inventors of the present invention have conducted studies to not only improve the set hold of the hair while maintaining the transparent properties of the hair gel, but also to significantly reduce the stickiness of the hand and the hair. Phosphorus methacryloylethylbetaine methacrylate copolymer is used, acrylate / C10-30 alkyl acrylate crosspolymer is used as the thickener, and the setting agent and the thickener are mixed with the neutralizing agent at an optimum content ratio. The present invention was completed by revealing that a hair gel composition having the aforementioned effects can be obtained.

The hair gel composition of the present invention is represented by the above formula (1) as a setting agent, the mass average molecular weight 5,000 ~ 100,000, viscosity (20 ℃): 5,000 ~ 55,000cps , melting point (Tm) has a physical property of 110 ~ 290 ℃, positive Methacryloylethylbetaine methacrylate copolymer having a degree of 40 to 95% is included in an amount of 0.1 to 10% by weight based on the total weight of the composition. These properties, the degree of affinity and the content in the composition are optimized to improve the setting power while maintaining the transparency of the composition by improving the solubility of the methacryloyl ethyl methacrylate copolymer in water and compatibility with the thickener It is.

On the other hand, the above formula (1) includes five different monomer units, the methacryloyl ethyl beta methacrylate copolymer of the present invention other monomer units within the scope of the present invention It is not to exclude that it further contains, and in this invention, the methacryloyl acetylbetaine methacrylate copolymer may be an arrangement of a block copolymer or a random copolymer.

In addition, the hair gel composition of the present invention uses the above-described methacryloyl acetylbetaine methacrylate copolymer as a setting agent, in addition to the use of other components that are commonly used as setting agents in the hair gel is excluded. It is not.

The methacryloylethylbetaine methacrylate copolymer used in the composition of the present invention may be prepared, for example, as follows, but is not limited thereto.

First, a polymethacrylate copolymer including four monomer units except for a monomer unit having a betaine structure in Chemical Formula 1 is prepared. This type of polymethacrylate copolymer may be referred to as a precursor to methacryloylethylbetaine methacrylate copolymer, which is a setting agent of the present invention. This can be synthesized by the radical solution polymerization method, which is a commonly known polymerization method, methacrylate monomers corresponding to each repeating unit, but is not limited thereto. The polymethacrylate copolymer thus synthesized is reacted with a protonating agent to be protonated into a polymer containing zwitterionicity. This allows methacryloylethylbetaine methacrylate copolymer to be used as the setting agent in the present invention. This protonation reaction is formed by the reaction of the amino group and protonation agent contained in the polymethacrylate polymer obtained above. The amphoterics that can be used at this time include, for example, monohalogenated acetates such as sodium monochloroacetate, potassium monochloroacetate, sodium monobromoacetate and potassium monobromoacetate, and also monohalogenated acetic acid and sodium hydroxide or cal hydroxide. Although it can use also what neutralized cerium etc. in the solvent, It is not limited to these. In addition, the amount of the protonating agent is suitably stoichiometric 0.6 ~ 1.2 moles with respect to 1 mole of the monomer unit containing an amino group in the polymethacrylate polymer prepared above, at a lower content, the dry film of the hair resin composition is washed with water. It is difficult to do it, and when it is contained in an excessive amount, the hygroscopicity is increased, the set force may be lowered and stickiness may occur. Specifically, the above-mentioned protonation reaction may be performed by subjecting the above-described polymethacrylate copolymer composed of the four monomer units to a high temperature stirring by injecting a solution of the above protonating agent in a water-soluble organic solvent at once or by dividing thereto. It doesn't happen. The degree of protonation of the obtained protonated copolymer was confirmed by the following formula (1) by measuring the amine number by wet analysis.

% Of protonation = ([initial amine number]-[final amine number]) / [initial amine number] × 100

The hair gel composition according to the present invention contains 0.01 to 5% by weight of acrylate / C 10-30 alkyl acrylate crosspolymer as a thickener. This is a copolymer in which two or more monomers are bonded, wherein the ratio of the hydrophobic monomer units among the monomer units constituting the acrylate / C10-30 alkyl acrylate crosspolymer is acrylate / C10-30 alkyl acrylate crosspolymer. It is preferable that it is 0.01 to 60 weight% in the inside. This content is such that the properties of the composition according to the invention are not suspended or opaque and maintain adequate transparency.

In addition, the composition according to the present invention contains a neutralizing agent to neutralize the above-mentioned thickener to give a viscosity 0.01 to 10% by weight of the total weight of the composition. As the composition of the present invention increases the content of the neutralizing agent, the transparency is improved, but the pH is high and the stickiness increases, so the content to be used is limited. As such a neutralizing agent, for example, neutralizing agents such as triethanolamine (TEA), potassium hydroxide, aminomethyl propanol (AMP-95), sodium hydroxide, ammonium hydroxide, and the like are used alone or in combination thereof to have optimum transparency and thickening effect. A composition can be obtained.

In addition, the composition of the present invention is a component commonly used in hair gels within the scope of the present invention as a component that can fix or style the hair, a polymer resin, an additive, a thickener, a neutralizer, and a moisturizing and conditioning effect. pH adjusters, fragrances, sunscreens, hair protectors, colorants and solvents such as water and ethanol can be used together.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to examples. However, embodiments according to the present invention can be modified in many different forms, the scope of the present invention should not be construed as limited to the embodiments described below. Embodiments of the invention are provided to more fully describe the present invention to those skilled in the art.

Synthetic example

First, solution polymerization was performed using 15% by weight of methyl methacrylate, 30% by weight of n-butyl methacrylate, 15% by weight of n-octanyl methacrylate, and 40% by weight of N, N-dimethylaminoethyl methacrylate. By this, a methacrylate copolymer composed of these four monomer units was obtained. Sodium monochloroacetate was added as a protonating agent, and the amount was used as the ratio of 0.9 mol per mol of N, N-dimethylaminoethyl methacrylate monomer unit in the previously obtained methacrylate copolymer. The mixture was stirred at 80 ° C. to obtain a methacryloylethyl methacrylate copolymer having a mass average molecular weight of 40,000, a viscosity (20 ° C.) of 25,000 cps, a melting point (Tm) of 150 ° C., and a degree of affinity of 70%. .

Comparative Examples 1 to 4 and Examples 1 to 9

According to the components and contents shown in Tables 1 and 2 below, each hair gel composition was prepared by a conventional hair gel preparation method. In the table, the unit is weight percent.

In Table 1 and Table 2, setting 1 used methacryloyl ethylbetaine methacrylate copolymer prepared in the above synthesis example, setting 2 is PVP / dimethylaminoethyl methacrylate copolymer Copolymer 845 manufactured by ISP was used. As the thickener, Noveon's Carbopol having 20% by weight of hydrophobic monomer units was used as the acrylate / C10-30 alkyl acrylate crosspolymer, and TEA (Triethanolamine) was used as the neutralizing agent.

Evaluation methods used in each of the comparative examples and examples were evaluated mechanically and sensory, each evaluator was evaluated by the evaluation criteria for each evaluation item.

1) sensual assessment of stickiness

The evaluators recorded the amount of stickiness in the hand on the 5-point scale after applying the hair gel to the hand and applying it to the hair. Each evaluator score was added and then divided by the number of evaluators (n = 100) to obtain an average value.

(Test conditions: constant temperature and humidity room / 25 ℃, 40% RH, hair gel application amount: 3g)

※ Evaluation criteria: 5 out of 5 (Number of evaluation members: 100)

1 point: stickiness is very high

2 points | pieces: high stickiness

3 points: stickiness is normal

4 points | pieces: low stickiness

5 points | pieces: Very low stickiness

2) Mechanical evaluation of setting force

Hair coated with hair gel content is wound on spiral and dried. Curled hair was placed in a thermo-hygrostat (25 ° C., 80% RH), and the setting force effect was measured using a curl retention (%) equation over time.

CR (%) = (L ₀ -L _t ) / (L ₀ -L _s ) X 100

L _o = Hair Tress length

L _t = length of tress after t hours

L _s = initial tress length curled (t = 0)

Albert L. Micchelli, B. A., and F. Theodore Koehler, B. S. Polymer Properties Influencing Curl Retention at High Humidity J. Soc. 19,863-880 (Dec 9,1968)]

3) sensual evaluation of transparency

The evaluators placed the hair gel in a transparent container and recorded the degree of transparency on a five-point scale. Each evaluator score was added and then divided by the number of evaluators (n = 100) to obtain an average value.

(Test conditions: constant temperature and humidity room / 25 ℃, 40% RH, hair gel amount: 200g)

※ Evaluation criteria: 5 out of 5 (Number of evaluation members: 100)

1 point: Transparency is very bad (opaque)

2 points | pieces: transparency is bad (opaque)

3 points: transparency is normal (translucent)

4 points | pieces: Good transparency (transparent)

5 points | pieces: Transparency is very good (transparent)

Each evaluation result is summarized in Tables 3 and 4 below.

Referring to Tables 3 and 4, it can be seen that the composition prepared in Examples according to the present invention is excellent in fixing strength in hair and less sticky than in Comparative Example, and also maintains good transparency.

As described above, the hair gel composition of the present invention has a transparent property and has a very high set hold, and the stickiness in the hand and the hair is reduced, thereby producing an excellent hair styling effect.

Claims (3)

Based on the total weight of the composition, It is represented by the following formula (1), has a mass average molecular weight of 5,000 ~ 100,000, viscosity (20 ℃) 5,000 ~ 55,000cps, melting point (Tm) of 110 ~ 290 ℃ physical properties, 40 ~ 95% of methacryloyl 0.1 to 10% by weight of chibetaine methacrylate copolymer; 0.01 to 5 wt% of an acrylate / C10-30 alkyl acrylate crosspolymer containing 0.01 to 60 wt% of a hydrophobic monomer unit; and 0.01 to 10% by weight of a neutralizing agent; characterized in that the transparent hair gel composition comprising: <Formula 1>

In Formula 1, a, b, c, d, and e are molar ratios for each monomer unit, wherein a + b + c + d + e = 1. delete The method of claim 1, The neutralizing agent is a transparent type hair gel composition, characterized in that any one selected from the group consisting of triethanolamine, potassium hydroxide, aminomethyl propanol (AMP-95), sodium hydroxide and ammonium hydroxide.