JPH0627053B2 - Hair fixative - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a hair fixative, which is characterized by using a resin having excellent setting properties and good water solubility.

[Prior art]

As the resin composition used for the conventional hair fixative, etc.,
In particular, since those which are soluble in ethanol, isopropyl alcohol and water are selected, limited polyvinylpyrrolidone or its copolymers, special acrylate compounds and maleic acid copolymers are used. However, since the resin has a hard feel as a physical property, an appropriate amount of a plasticizer is mixed and adjusted, but the soft feel and the setting force are not well balanced at present.

[Problems to be Solved by the Invention]

An object of the present invention is to provide a hair fixative containing a resin as a main component, which is soluble in ethanol, isopropyl alcohol and water, has a small amount of moisture absorption, and has a soft feel and a setting force.

[Means for Solving the Problems]

The present invention has solved the above-mentioned problems, and found that a polymer having sufficient strength but sufficient flexibility and having a high dissolution rate at room temperature is suitable. That is, it is obtained by reacting a polyalkylene oxide compound obtained by addition-polymerizing an alkylene oxide containing ethylene oxide with an organic compound having two active hydrogen groups, and a polyvalent carboxylic acid, its anhydride or its lower alkyl ester or diisocyanate. A hair fixative containing a high molecular weight compound having a weight average molecular weight of 10,000 or more as an essential component is suitable for this purpose. (Requirements Constituting Means) In the polyalkylene oxide compound used in the present invention, examples of the organic compound having two active hydrogen groups include ethylene glycol, propylene glycol, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, 1, 6-hexanediol, aniline, etc. are mentioned. The alkylene oxide containing ethylene oxide which is subjected to addition polymerization with an organic compound having two active hydrogen groups is ethylene oxide alone or an alkylene oxide containing ethylene oxide. Alkylene oxides other than ethylene oxide have 3 to 30 carbon atoms, and examples thereof include propylene oxide, butylene oxide, styrene oxide, α-olefin epoxide, and glycidyl ethers. 3 carbons here
The content of the alkylene oxide of -30 is arbitrary,
The content of ethylene oxide is preferably 70 to 100% by weight based on the total alkylene oxide. The addition polymerization of alkylene oxide is carried out by a known method, but the addition method of ethylene oxide and other alkylene oxide can be appropriately selected such as by mixing or by block polymerization. The weight average molecular weight of the obtained polyalkylene oxide compound is preferably 100 or more, and when the weight average molecular weight is less than 100, the object of the present invention is not achieved. Next, this polyalkylene oxide compound is reacted with a polyvalent carboxylic acid, its anhydride or its lower alkyl ester or diisocyanate. Examples of the polycarboxylic acid include phthalic acid, isophthalic acid, terephthalic acid, sebacic acid, dimer acid and pyromellitic acid. Examples of anhydrides of polycarboxylic acids include anhydrides of each of the above-listed carboxylic acids.
Examples of the lower alkyl ester include methyl ester, dimethyl ester, diethyl ester and the like. The most preferable specific examples are dimethyl terephthalate, dimethyl phthalate, dimethyl isophthalate, dimethyl sebacate, and pyromellitic dianhydride. The reaction ratio of this polymerization reaction is arbitrary. That is, any ratio may be used as long as the weight average molecular weight of the high molecular weight compound is 10,000 or more. The polymerization reaction is preferably carried out under the conditions of 120 to 250 ° C. and 10 ^{−4 to} 10 Torr. Examples of the diisocyanate include tolylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, 4,4′-methylene-bis- (cyclohexyl isocyanate) and the like. This urethanization reaction is carried out, for example, with an NCO / OH equivalent ratio of 0.5.
It is obtained by mixing in the range of 1.5 to 1.5 and performing the reaction at 80 to 150 ° C. for 1 to 5 hours. The high molecular weight compound needs to have a weight average molecular weight of 10,000 or more. If it is less than 10,000, the mechanical strength is low and the setting force is small, which is not preferable. Hair fixatives include, for example, hair spray, hair set,
There is a method of forming a thin film on the hair surface by evaporating and scattering the solvent using a polymer dissolved in a solvent or the like, which is used for set lotion, and a method of drying and fixing with heat. In that case, it is necessary to maintain a natural finish and a healthy hair condition. In the present invention, the high molecular weight compound is dissolved in ethanol, isopropanol or water alone or a mixed solvent thereof. The dissolution can be sufficiently performed at room temperature and under stirring, but it is also possible to employ heating, ultrasonic waves, or the like. In the production of hair spray, a propellant is used to inject a fixing agent component to hold a hairstyle. Further, as the binder component, other high molecular weight compounds, for example, polyacrylic compounds, polyvinyl compounds, etc. can be sufficiently used in combination. Further, it is possible to add a fragrance, a coloring agent, a plasticizer, a bactericide, a vitamin agent, a silicon compound or the like. When used as a hair spray, a propellant is blended, and either a CFC type or a liquefied petroleum gas type can be used. In the case of a hair set or a set lotion, the one obtained by removing the propellant of the above hair spray formulation can also be used. The total content of the high molecular weight compound is 1 to 30% by weight in the composition.
Is preferred.

[Action]

The hair fixative of the present invention is one in which the high molecular weight compound as a resin component is soluble in alcohols and water, is flexible and has a good film-forming property, is excellent in setting properties, and has good combability. is there. Furthermore, since it absorbs less moisture, it does not become sticky, and since it dissolves quickly in water, it can be easily washed off when washing hair.

【Example】

Hereinafter, the present invention will be described in more detail with reference to Examples. Parts in the examples indicate parts by weight. Example 1. Polyethylene glycol (weight average molecular weight of 10,000
0) 2.2 parts of dimethyl terephthalate was added to 100 parts and subjected to polyesterification reaction to obtain a weight average molecular weight of 130,0
No. 00 compound (hereinafter referred to as high molecular weight compound A) was obtained. 50/50 of this high molecular weight compound A is ethanol / water
(Weight ratio) to make a 10 wt% solution. Furthermore, 0.1 wt% of fragrance was blended to obtain a set lotion. The evaluation results are shown in Table 2. Example 2. Polyalkylene oxide compound obtained by block addition polymerization of bisphenol A with 85% by weight of ethylene oxide and 15% by weight of propylene oxide (weight average molecular weight 2
Hexamethylene diisocyanate (0.84 parts) and a small amount of dibutyltin dilaurate were mixed with 100 parts of (10,000) and urethanized at 100 ° C. to obtain a polymer having a weight average molecular weight of 250,000 (hereinafter referred to as high molecular weight compound B). . This was dissolved in 80/20 (weight ratio) of ethanol / water to prepare a 5 wt% solution, which was enclosed in a hair spray container together with liquefied petroleum gas to obtain a hair spray composition. The evaluation results are shown in Table 2. Examples 3-7. The high molecular weight compounds C to E having the compositions shown in Table 1 were synthesized, set lotions and hair sprays were prepared with the solvents shown in Table 2, and the following evaluations were performed together with Examples 1 and 2. (Evaluation method) Twenty people were randomly selected as testers, and the following items were evaluated. Hair flexibility, setability, non-stickiness, combability 20g of hair is bundled into a uniform length, and 2g of hair fixative (excluding the propellant) in each prescription is sprayed and thoroughly combed. After doing so, they were dried with hot air at 70 ° C. Twenty samples were made in this state, and each evaluation item was judged according to the following criteria. The judgment was made by an average of 20 people. ◯: Good Δ: Not particularly good feeling ×: Poor Washability Removability 100 g of hot water at 40 ° C. for hair prepared in the same manner as the above evaluation
Immerse in water for 10 seconds to pull up, then add 1 to 100 g of other warm water.
It was immersed in the same manner for 0 seconds, pulled up, and dried with hot air from a dryer at 80 ° C. Those with 99% or more removed were evaluated as ◯, and those less than 99% were evaluated as Δ. As a result of the evaluation, all of the products of the present invention showed a good set finish property, and the removal with warm water could be easily performed. On the other hand, with the commercial product, combability and cleaning and removal were a little difficult, resulting in stiff hair.

【The invention's effect】

The hair fixative of the present invention has sufficient finishing properties and water solubility, and due to the flexibility of the high molecular weight compound used in the present invention, it can be an unprecedented good one.

Claims (1)

[Claims] 1. A polyalkylene oxide compound obtained by addition-polymerizing an alkylene oxide containing ethylene oxide to an organic compound having two active hydrogen groups, and a polyvalent carboxylic acid, an anhydride thereof or a lower alkyl ester thereof or a diisocyanate is reacted. A hair fixative comprising a high molecular weight compound having a weight average molecular weight of 10,000 or more obtained as an essential component.