CN110075009B

CN110075009B - Solid depilatory wax and preparation method thereof

Info

Publication number: CN110075009B
Application number: CN201910400583.XA
Authority: CN
Inventors: 范智勇; 范德贤; 颜柳青
Original assignee: Guangzhou Dexin Wax Products Co ltd
Current assignee: Guangdong Dexin New Materials Technology Co.,Ltd.
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2022-03-22
Anticipated expiration: 2039-05-15
Also published as: CN110075009A

Abstract

The invention relates to a solid depilatory wax and a preparation method thereof. The solid depilatory wax is prepared from the following raw materials in parts by weight: 5-15 parts of a film forming agent, 60-80 parts of a tackifier, 10-20 parts of wax, 1-10 parts of a functional assistant and 0.5-5 parts of a filler; wherein the functional aid comprises hydrogenated coconut oil and hydrogenated styrene-butadiene block copolymer; the film forming agent comprises ethylene-vinyl acetate copolymer and ethylene-vinyl acetate-vinyl alcohol terpolymer. The solid depilatory wax has low melting point, can exert excellent depilatory effect under the condition of low melting point, and has good depilatory effect on fine hair (such as lip fine hair).

Description

Solid depilatory wax and preparation method thereof

Technical Field

The invention relates to a depilatory wax, in particular to a solid depilatory wax and a preparation method thereof.

Background

Due to the need for human beauty, the human body needs to remove the superfluous hair from some parts of the body. Physical depilation is a common depilation method, and can be classified into mechanical depilation and wax depilation.

The wax-type depilatory wax is basically cold wax in the prior art, and the main component of the wax-type depilatory wax is a saccharide raw material, and the external shape of the wax-type depilatory wax is paste. There are also reports of thermal waxes, but the main components are rosin resin, paraffin, grease (mineral oil or vegetable oil), the appearance is pasty body, and the pasty depilatory wax must use depilatory paper to assist depilation, namely: the depilatory wax is coated on the part of the skin with hairs, then the depilatory paper is covered on the depilatory wax on the skin, and then the depilatory paper is quickly torn off, and the hairs are removed along with the depilatory paper. Disadvantages of such epilatory waxes are: firstly, there is certainly wax residue, and the process of treating the residual wax after depilation must be carried out; secondly, the consumption of the unhairing paper is larger, which increases the cost and is not beneficial to environmental protection. In addition, the existing depilatory wax, whether cold wax or hot wax, has the defect of not ideal removal for the fine hair (such as the fine hair of lips).

Chinese patent CN105232359A discloses a solid depilatory wax for human body, which discloses a solid depilatory wax, without depilatory paper, has good removing effect on the hair at the position which is difficult to be treated, such as oxter and bikini position, but does not provide specific hair removing effect test, especially for the removing effect of fine hair. In practical application, the removal of the fine hair is still not ideal. Meanwhile, the melting point is high (54-58 ℃), so that the operation is inconvenient for a user and the comfort is poor when the multifunctional clothes hanger is used.

Chinese patents CN108379120A and CN1868446A both disclose epilatory waxes having melting temperatures of 45 ℃ to 50 ℃ that can be used at lower temperatures, but do not teach or provide specific hair removal tests, especially for fine hair removal. The hot wax adsorbs the hair by melting and solidifying, and the unhairing effect of the hot wax is easily influenced at a lower using temperature.

In summary, it is difficult for the existing solid depilatory wax to combine a lower application temperature and a better depilatory effect, especially for removing fine hair such as fine hair on face and lips, and in addition, in view of the sensitivity of face and lip skin, the solid depilatory wax product needs to have low irritation and not cause skin sensitivity.

Disclosure of Invention

Based on this, there is a need to provide a solid epilatory wax. The solid depilatory wax is low in use temperature, can exert an excellent depilatory effect at a low temperature, is good in depilatory effect on fine hair (such as fine hair on the face and lips), low in formula stimulation, not prone to allergy, moderate in softness, not prone to fracture, good in film forming and good in user experience.

The solid depilatory wax is prepared from the following raw materials in parts by weight:

wherein the functional aid comprises hydrogenated coconut oil and hydrogenated styrene-butadiene block copolymer;

the film forming agent comprises ethylene-vinyl acetate copolymer and ethylene-vinyl acetate-vinyl alcohol terpolymer, and the viscosity is 4-6 ten thousand.

In one embodiment, the solid epilatory wax is prepared from the following raw materials in parts by weight:

in one embodiment, the functional assistant comprises hydrogenated coconut oil and hydrogenated styrene-butadiene block copolymer in a weight ratio of 1: 5-20.

In one embodiment, the functional assistant comprises hydrogenated coconut oil and hydrogenated styrene-butadiene block copolymer in a weight ratio of 1: 10-15.

In one embodiment, the film forming agent comprises an ethylene-vinyl acetate copolymer and an ethylene-vinyl acetate-vinyl alcohol terpolymer in a weight ratio of 1: 0.5-2.

In one embodiment, the film forming agent comprises an ethylene-vinyl acetate copolymer and an ethylene-vinyl acetate-vinyl alcohol terpolymer in a weight ratio of 1: 1-2.

In one embodiment, the filler is selected from at least one of mica powder, titanium dioxide, and zinc oxide.

In one embodiment, the filler is mica powder, titanium dioxide, and zinc oxide.

In one embodiment, the tackifier is selected from at least one of rosin resin, rosin glycerol ester, hydrogenated rosin resin, hydrogenated rosin glycerol ester, hydrogenated rosin methyl ester, disproportionated rosin, petroleum resin, hydrogenated petroleum resin, pentaerythritol ester, and terpene resin.

In one embodiment, the wax is selected from at least one of paraffin wax, microcrystalline wax, petrolatum, beeswax, wood wax, carnauba wax, montan wax, PE wax, PP wax, fischer-tropsch wax, carnauba wax, castor wax, wool wax, silicone wax.

The invention also provides a preparation method of the solid depilatory wax, which comprises the following steps:

mixing the film forming agent, the tackifier, the wax, the functional auxiliary agent and the filler, and heating and melting; stirring the obtained melt for 1-3 h.

Compared with the prior art, the invention has the following beneficial effects:

the solid depilatory wax of the invention reasonably configures the raw material components, so that the obtained solid depilatory wax has lower melting point, simultaneously, the hydrogenated coconut oil and the hydrogenated styrene-butadiene block copolymer are innovatively adopted as functional additives to adjust the film forming agent, the film forming agent compounded by the ethylene-vinyl acetate copolymer and the ethylene-vinyl acetate-vinyl alcohol terpolymer is adopted, the hydrogenated coconut oil and the hydrogenated styrene-butadiene block copolymer have no unsaturated bond, the film forming property of the compounded film forming agent can be adjusted by matching with the structural block, so that the solid depilatory wax still has excellent film forming property under the low temperature condition (40-45 ℃), is easy to permeate into the root of the hair to form a compact wax film with the hair, and the wax film has moderate ductility and flexibility, and can increase the retarding force between the hair and the wax film when peeling the skin, the hair is not easy to slip from the wax film, so that the grabbing and removing of the fine hair are improved, and meanwhile, the wax film is not easy to tear or break, so that a good complete wax film tearing and removing effect is achieved.

Therefore, the prepared solid depilatory wax can play an excellent depilatory effect at a low temperature, has a good depilatory effect on fine hair (such as lip fine hair), is low in formula irritation, not easy to cause allergy, moderate in softness, not easy to break, good in film forming, short in time required for melting, high in use efficiency and good in user experience, and is not easy to cause allergy.

Detailed Description

The solid epilatory wax of the invention and the method for its preparation are described in further detail below with reference to specific examples.

The embodiment of the invention provides a solid depilatory wax which is prepared from the following raw materials in parts by weight:

the film forming agent comprises ethylene-vinyl acetate copolymer and ethylene-vinyl acetate-vinyl alcohol terpolymer.

Based on the low use temperature and good hair removal rate which are difficult to be considered at the same time in the existing solid depilatory wax, particularly the removal rate of fine hair, the solid depilatory wax provided by the invention can still have excellent film forming property under the low temperature condition (40-45 ℃) by adopting a proper film forming agent to match, and utilizing hydrogenated coconut oil and hydrogenated styrene-butadiene block copolymer as functional auxiliaries to adjust the film forming agent, and the principle is as follows: the compounded film forming agent can better penetrate into the root of the hair under the assistance of the functional auxiliary agent, the adsorption to fine hair is enhanced, and the formed wax film is more compact, so that the hair is not easy to remove from the wax film during stripping, and the removal rate of the hair is further improved.

In addition, although the existing solid depilatory wax pays attention to the ductility of the wax film, the existing solid depilatory wax is still not ideal in the practical application process, and the reason why the existing solid depilatory wax still has difficulty in achieving a good fine hair removal effect is also one of the reasons. The solid depilatory wax provided by the invention has the advantages that through the optimization of the formula, the wax film has proper ductility and flexibility, and the hysteresis force between hairs and the wax film can be increased when the skin is peeled off, so that the hairs are not easy to slip from the wax film, and the grabbing and removing of the fine hairs are further improved.

In some preferred embodiments, the solid epilatory wax is prepared from the following raw materials in parts by weight:

in some preferred embodiments, the functional aid comprises hydrogenated coconut oil and hydrogenated styrene-butadiene block copolymer in a weight ratio of 1:5 to 20. More preferably, the weight ratio is controlled to be 1: 10-15.

In some preferred embodiments, the film forming agent comprises ethylene-vinyl acetate copolymer and ethylene-vinyl acetate-vinyl alcohol terpolymer in a weight ratio of 1: 0.5-2. More preferably, the weight ratio is controlled to be 1: 1-2.

By further optimizing the raw material composition in the solid epilation wax formulation, a more excellent fine hair removal effect can be obtained.

In addition, the molecular weight of the ethylene-vinyl acetate copolymer and the ethylene-vinyl acetate-vinyl alcohol terpolymer in the film forming agent can be respectively controlled between 4 ten thousand and 5 ten thousand. Therefore, the proper viscosity of the film forming agent is obtained, the ductility and the toughness of the film layer are optimized, and the grabbing effect of the fine hair is improved.

Further, the tackifier is at least one selected from rosin resin, rosin glyceride, hydrogenated rosin resin, hydrogenated rosin glyceride, hydrogenated rosin methyl ester, disproportionated rosin, petroleum resin, hydrogenated petroleum resin, pentaerythritol ester and terpene resin. Preferably, the tackifier is rosin resin, rosin glycerol ester, hydrogenated rosin glycerol ester, and hydrogenated rosin methyl ester.

The rosin resin with compatibility is used as the tackifier, so that the toughness of the wax film can be optimized, the wax film is not easy to tear, and the residue is avoided while the fine hair grabbing effect is improved. Further preferably, the weight ratio of the rosin resin, the rosin glyceride, the hydrogenated rosin glyceride and the hydrogenated rosin methyl ester is 30-40: 8-15: 2-7: 1.

the wax is at least one selected from paraffin wax, microcrystalline wax, vaseline, beeswax, wood wax, carnauba wax, montan wax, PE wax, PP wax, Fischer-Tropsch wax, palm wax, castor wax, wool wax, and silicon wax. Preferably, the wax is paraffin wax and silicone wax.

The compatible wax can coordinate the composition of the raw materials to ensure that the formed wax film is more compact. Further preferably, the weight ratio of the paraffin wax to the silicon wax is 2-7: 1.

The filler may be selected from at least one of mica powder, titanium dioxide, and zinc oxide. In some preferred embodiments, the filler is mica powder, titanium dioxide, and zinc oxide.

The zinc oxide, the mica powder and the titanium dioxide are used for synergism, so that the irritation, allergy and other factors of the rosin raw materials to the skin can be reduced. Further preferably, the weight ratio of the three components is 1: 4-8: 1.

the following are specific examples.

Example 1

wherein the functional assistant is hydrogenated coconut oil and hydrogenated styrene-butadiene block copolymer in a weight ratio of 1: 12.

The film forming agent is ethylene-vinyl acetate copolymer and ethylene-vinyl acetate-vinyl alcohol terpolymer with the weight ratio of 1: 1.5.

The filler is mica powder, titanium dioxide and zinc oxide in a weight ratio of 1:6: 1.

The tackifier is 35: 12: 5:1 rosin resin, rosin glycerol ester, hydrogenated rosin glycerol ester and hydrogenated rosin methyl ester.

The wax is 5:1 paraffin (54# fully refined paraffin) and silicon wax in weight ratio.

The preparation method of the solid depilatory wax comprises the following steps:

sequentially feeding the paraffin wax, the ethylene-vinyl acetate copolymer, the ethylene-vinyl acetate-vinyl alcohol terpolymer, the hydrogenated coconut oil, the hydrogenated styrene-butadiene block copolymer, the silicone wax, the rosin glycerin ester, the rosin resin, the hydrogenated rosin methyl ester, the hydrogenated rosin glycerin ester, the mica and the titanium dioxide in this order, and heating and melting; stirring the obtained melt for 2 h.

Example 2

Example 3

Example 4

wherein the functional assistant is hydrogenated coconut oil and hydrogenated styrene-butadiene block copolymer in a weight ratio of 1: 5.

The film forming agent is ethylene-vinyl acetate copolymer and ethylene-vinyl acetate-vinyl alcohol terpolymer with the weight ratio of 1: 2.

Example 5

wherein the functional assistant is hydrogenated coconut oil and hydrogenated styrene-butadiene block copolymer in a weight ratio of 1: 20.

The film forming agent is ethylene-vinyl acetate copolymer and ethylene-vinyl acetate-vinyl alcohol terpolymer with the weight ratio of 1: 0.5.

Example 6

The tackifier is 35: 12: 1 pentaerythritol ester, disproportionated rosin and petroleum resin.

The wax is wool wax and vaseline with the weight ratio of 5: 1.

sequentially feeding the wool wax, the ethylene-vinyl acetate copolymer, the ethylene-vinyl acetate-vinyl alcohol terpolymer, the hydrogenated coconut oil, the hydrogenated styrene-butadiene block copolymer, the vaseline, the pentaerythritol ester, the disproportionated rosin, the petroleum resin, the mica and the titanium dioxide in this order, and heating and melting; stirring the obtained melt for 2 h.

Example 7

The tackifier is 35: 12: 1 hydrogenated petroleum resin and terpene resin.

The wax is beeswax and Fischer-Tropsch wax in a weight ratio of 10: 1.

feeding the beeswax, the ethylene-vinyl acetate copolymer, the ethylene-vinyl acetate-vinyl alcohol terpolymer, the hydrogenated coconut oil, the hydrogenated styrene-butadiene block copolymer, the Fischer-Tropsch wax, the hydrogenated petroleum resin, the terpene resin, the mica and the titanium dioxide in this order, and heating and melting; stirring the obtained melt for 2 h.

Comparative example 1

This comparative example is a solid epilatory wax, the starting materials and preparation of which are similar to those of example 1, except that: the functional assistant is only hydrogenated styrene-butadiene block copolymer.

Specifically, the solid depilatory wax is prepared from the following raw materials in parts by weight:

wherein the functional auxiliary agent is hydrogenated styrene-butadiene block copolymer.

The filler is mica powder and titanium dioxide in a weight ratio of 1: 6.

sequentially feeding the paraffin, the ethylene-vinyl acetate copolymer, the ethylene-vinyl acetate-vinyl alcohol terpolymer, the hydrogenated styrene-butadiene block copolymer, the silicon wax, the rosin glycerin ester, the rosin resin, the hydrogenated rosin methyl ester, the hydrogenated rosin glycerin ester, the mica and the titanium dioxide in sequence, and heating and melting; stirring the obtained melt for 2 h.

Comparative example 2

This comparative example is a solid epilatory wax, the starting materials and preparation of which are similar to those of example 1, except that: the film forming agent is only ethylene-vinyl acetate copolymer.

The film forming agent is ethylene-vinyl acetate copolymer.

The filler is mica powder and titanium dioxide in a weight ratio of 1: 6.

sequentially feeding the paraffin wax, the ethylene-vinyl acetate copolymer, the hydrogenated coconut oil, the hydrogenated styrene-butadiene block copolymer, the silicon wax, the rosin glycerin ester, the rosin resin, the hydrogenated rosin methyl ester, the hydrogenated rosin glycerin ester, the mica and the titanium dioxide in this order, and heating and melting; stirring the obtained melt for 2 h.

Comparative example 3

This comparative example is an epilatory wax, using an epilatory wax formulation as disclosed in patent CN 105232359A.

Specifically, the depilatory wax is prepared from the following raw materials (in percentage by mass):

tackifier (10% of atactic polypropylene, 5% of polyisobutylene, 15% of atactic polystyrene), plasticizer (1% of mineral oil, 2% of methyl phthalate and 4% of ethyl phthalate), toughening agent (1% of propylene-butylene copolymer, 1% of ethylene-propylene copolymer and 2% of butylene-styrene copolymer), film forming agent (1% of ethylene-acrylic acid copolymer, 2% of diisocyanate and 4% of triisocyanate), stabilizer (1% of bis (3, 5-tertiary butyl-4-hydroxyphenyl) thioether, 1% of 2, 6-di-tert-butyl-p-cresol and 2% of 2, 6-tertiary butyl-4-methylphenol), and the balance of wax (paraffin and polyethylene wax mixture with equal mass).

The preparation method of the depilatory wax comprises the following steps:

firstly, heating and melting wax substances, then adding the tackifier, the plasticizer, the flexibilizer, the film forming agent and the stabilizer, raising the temperature to 180 ℃, stirring at the rotating speed of 10 revolutions per minute, and after the raw materials are completely melted, mixing and stirring at the rotating speed of 30 revolutions per minute for 4 hours until the raw materials are uniformly mixed to obtain the wax.

Comparative example 4

This comparative example is an epilatory wax, using an epilatory wax formulation as disclosed in patent CN 108379120A.

50% of rosin, 2% of hydrogenated rosin, 2% of glycerol hydrogenated rosin ester, 7% of ethylene-vinyl acetate copolymer, 9% of white beeswax, 28% of 40# paraffin and 2% of mineral oil.

The preparation method of the depilatory wax comprises the following steps:

dissolving the white beeswax and 40# paraffin in the mineral oil to obtain a first mixed solution; adding rosin, hydrogenated rosin and glycerol hydrogenated rosin ester into the first mixed solution, and heating to 120 ℃ to completely melt to obtain a second mixed solution; and adding the ethylene-vinyl acetate copolymer into the second mixed solution, stirring and homogenizing to obtain the composite material.

Comparative example 5

This comparative example is an epilatory wax, using an epilatory wax formulation as disclosed in patent CN 1868446A.

Specifically, the depilatory wax is prepared from the following raw materials (in parts by weight) and steps:

heating and mixing 8.8 parts of refined beeswax, 19.1 parts of microcrystalline wax, 14.6 parts of food-grade paraffin, 23 parts of petroleum resin, 30 parts of glyceryl monostearate, 1.1 parts of oil-soluble haematochrome and 2.1 parts of aloe extract uniformly, controlling the temperature to be 105 +/-5 ℃, adding 1.3 parts of A-100 titanium dioxide, and homogenizing and dispersing for 10min to obtain the aloe wax.

Performance testing of examples 1-7 and comparative examples 1-5:

the user: women with fine lips, divided into 12 groups of 3 persons, were each deprived of fine lips by using the depilatory wax of examples 1-7 and comparative examples 1-5, respectively.

The using method comprises the following steps: heating the depilatory wax to the use temperature to melt, coating the depilatory wax on the part with fine hairs on the lips, keeping for 15 minutes, and tearing off. The temperature, melting time and depilation rate of each user were recorded and the average value was taken for each set of data. The results are shown in table 1:

TABLE 1

In addition, in order to improve the convenience of using the solid epilatory wax, the solid epilatory wax was melted by heating in a microwave oven (all with high fire), and the results are shown in table 2:

TABLE 2

	Time of microwave	Melting condition
			Example 1	1min	Melt completely
Comparative example 1	1min	Melt completely
			Comparative example 2	1min	Melt completely
Comparative example 3	5min	Melt completely
			Comparative example 4	2min	Melt completely
Comparative example 5	2min	Melt completely

Note: comparative examples 3-5 when melted, a cup of about 100mL of water was placed simultaneously with the microwave, otherwise the microwave oven would be left to stop.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The solid depilatory wax is characterized by being prepared from the following raw materials in parts by weight:

wherein the functional assistant comprises hydrogenated coconut oil and a hydrogenated styrene-butadiene block copolymer in a weight ratio of 1: 5-20;

the film forming agent comprises an ethylene-vinyl acetate copolymer and an ethylene-vinyl acetate-vinyl alcohol terpolymer in a weight ratio of 1: 0.5-2;

the filler is mica powder, titanium dioxide and zinc oxide in a weight ratio of 1: 4-8: 1;

the tackifier is at least one selected from rosin resin, rosin glyceride, hydrogenated rosin resin, hydrogenated rosin glyceride, hydrogenated rosin methyl ester, disproportionated rosin, petroleum resin, hydrogenated petroleum resin, pentaerythritol ester and terpene resin;

the wax is at least one selected from paraffin wax, microcrystalline wax, vaseline, beeswax, wood wax, carnauba wax, montan wax, PE wax, PP wax, Fischer-Tropsch wax, palm wax, castor wax, wool wax, and silicon wax.

2. The solid epilatory wax of claim 1, made from raw materials comprising, in parts by weight:

3. the solid epilatory wax of claim 1, wherein the functional additive comprises hydrogenated coconut oil and hydrogenated styrene-butadiene block copolymer in a weight ratio of 1:10 to 15.

4. The solid epilatory wax of claim 1, wherein the functional agent is a hydrogenated coconut oil and a hydrogenated styrene-butadiene block copolymer in a weight ratio of 1: 12.

5. The solid epilatory wax of claim 1, wherein the film-forming agent comprises ethylene-vinyl acetate copolymer and ethylene-vinyl acetate-vinyl alcohol terpolymer in a weight ratio of 1:1 to 2.

6. The solid epilatory wax of claim 5, wherein the film former comprises ethylene vinyl acetate and ethylene vinyl acetate vinyl alcohol terpolymer in a weight ratio of 1: 1.5.

7. The solid epilatory wax of any one of claims 1 to 6 wherein the tackifier is rosin resin, rosin glycerol ester, hydrogenated rosin glycerol ester, and hydrogenated rosin methyl ester; or

The tackifier is pentaerythritol ester, disproportionated rosin and petroleum resin; or

The tackifier is hydrogenated petroleum resin and terpene resin.

8. The solid epilatory wax of claim 7, wherein the tackifier is present in an amount of 30 to 40: 8-15: 2-7: 1 rosin resin, rosin glycerol ester, hydrogenated rosin glycerol ester and hydrogenated rosin methyl ester.

9. The solid epilatory wax of any one of claims 1 to 6, wherein the wax is a paraffin wax or a silicone wax; or

The wax is wool wax and vaseline; or

The wax is beeswax and Fischer-Tropsch wax.

10. The solid epilatory wax of claim 9, wherein the wax is a paraffin wax and a silicone wax in a weight ratio of 2 to 7: 1.

11. A process for the preparation of a solid epilatory wax as claimed in any one of claims 1 to 10, comprising the steps of: