CN115444784B - Hair coarse powder and preparation method thereof - Google Patents
Hair coarse powder and preparation method thereof Download PDFInfo
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- CN115444784B CN115444784B CN202211179249.4A CN202211179249A CN115444784B CN 115444784 B CN115444784 B CN 115444784B CN 202211179249 A CN202211179249 A CN 202211179249A CN 115444784 B CN115444784 B CN 115444784B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/25—Silicon; Compounds thereof
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- A—HUMAN NECESSITIES
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- A61K8/8141—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- A61K8/8152—Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q5/00—Preparations for care of the hair
- A61Q5/06—Preparations for styling the hair, e.g. by temporary shaping or colouring
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Abstract
The invention discloses a hair coarse powder and a preparation method thereof, wherein the hair coarse powder comprises the following components in parts by weight: water, silica, VP/acrylic acid (esters) and laurylmethacrylate copolymer=1 (1.6-1.8): 0.55-0.65, the specific surface area of the silica being 210m 2 /g‑230m 2 And/g. The hair thickening powder has strong adsorption force to hair, lasting and natural thickening effect, is not easy to absorb moisture, and solves the problem that the prior similar products cannot achieve the thickening effect, thickening durability and moisture absorption resistance.
Description
Technical Field
The invention belongs to the technical field of hair cosmetics, and particularly relates to hair coarse powder and a preparation method thereof.
Background
To date, it has been a pursuit of people to have hair with dark and dense color. While a thin and soft hair is more likely to visually cause a feeling of less hair, thickening hair is a method of visually increasing hair. For this reason, hair-setting powders are commercially available, which are usually prepared by using powders such as fiber powder, corn starch, talc, etc. as carriers and adding black pigment. The thickening principle is that the thickening effect is achieved by adsorbing the powder on the hair through physical adsorption.
The prior hair thickening powder has a certain effect of thickening hair, but the following three problems generally exist: 1) The powder has weak adsorptivity to hair, so that the coarse powder of the hair is easy to fall off, and the thickening effect is not durable; 2) The powder is easy to absorb moisture, so that the phenomenon that small particle powder is formed on hair due to moisture absorption and aggregation of the powder is easy to occur in the use of the hair conditioner in a rainy and foggy day, and the thickening effect is not ideal and even the appearance is influenced; 3) The thickening durability may be improved to a certain extent by reducing the particle size (increasing the specific surface area) of the powder, but the thickening effect is not obvious easily, and the particle size of the powder is increased (reducing the specific surface area), so that the thickening is facilitated, but the smearing trace is obvious easily, the thickening effect is not natural enough, and the thickening durability is difficult to ensure.
Therefore, there is still a lack of a hair thickening powder which can give consideration to thickening effect, thickening durability and moisture absorption resistance, and cannot meet market demands.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the hair thickening powder which has strong adsorption force to hair, lasting and natural thickening effect, is not easy to absorb moisture, is not easy to agglomerate due to moisture absorption, and can better meet the use requirement in rainy and foggy days.
The invention also provides a method for preparing the hair-thickening powder.
According to an embodiment of the first aspect of the present invention, there is provided a hair meal comprising, in weight ratio: water: silica: VP/acrylic acid (esters) copolymer/laurylmethacrylate=1 (1.6-1.8): (0.55-0.65), the specific surface area of the silica is 210m 2 /g-230m 2 /g。
The hair-setting powder according to the embodiment of the invention has at least the following beneficial effects:
the silica has certain hydrophobicity and can endow the hair coarse powder with better moisture absorption resistance. The silica is used as a carrier, and the specific surface area of the silica and the ratio of water to the silica are controlled, so that the water is wrapped by the silica to obtain a powdery state in which the water and the silica are uniformly mixed, the natural thickening effect is realized, the stability of the powder is improved, and the powder cannot produce water under the vibration and high-low temperature environments.
By selecting the specific surface area of the silica, the obvious thickening effect of the hair is realized, and the VP/acrylic acid (ester) copolymer/lauryl alcohol methacrylate copolymer is further matched with the specific surface area of the silica to be used as an adhesive, so that the adhesive force of the powder to the hair is improved, coarse powder is not easy to fall off, and the thickening durability is improved.
By controlling the proportion of water, silica and VP/acrylic acid (ester) or laurinol methacrylate copolymer, the uniform powder state can be obtained, the aggregation of powder due to the use of an adhesive is avoided, the aggregation can not be caused during application, the thickening durability is ensured, the thickening naturalness of hair can be improved, the moisture absorption resistance is excellent, and the moisture absorption and aggregation phenomenon can not occur during the use in a humid environment.
According to some embodiments of the invention, the silica has a specific surface area of 220m 2 /g-230m 2 /g。
According to some embodiments of the invention, the weight ratio of the water to the VP/acrylic acid (ester) based/lauryl methacrylate copolymer is 1:0.6-0.65.
According to some embodiments of the invention, pigments are also included. The type of the pigment is not particularly limited in the present invention, and a pigment which is common in the art may be selected according to the color development, for example, for black hair, CI 77499 (black powder) may be used as the pigment.
According to some embodiments of the invention, the pigment is present in an amount of 0.1% to 1% by weight of the total weight of the hair meal. Further, the pigment is used in an amount of 0.1% to 0.5% by weight based on the total weight of the hair-setting powder.
According to some embodiments of the invention, a preservative is also included. The type of the preservative is not particularly limited in the present invention, and as an example, the preservative may be selected from common substances such as potassium sorbate, sodium benzoate, and the like.
According to some embodiments of the invention, the preservative is present in an amount of 0.1% to 1% by weight of the total weight of the hair meal. Further, the preservative is present in an amount of from 0.1% to 0.5% by weight of the total hair meal.
According to an embodiment of the second aspect of the present invention, there is provided the above-mentioned method for preparing hair-setting powder, comprising the steps of: the components were mixed.
The preparation method of the hair coarse powder has at least the following beneficial effects:
the preparation process is simple, and the hair thickening powder with uniform powder quality, good thickening effect and thickening durability and excellent moisture absorption resistance can be obtained based on one-step mixing.
According to some embodiments of the invention, the mixing is by high speed stirring.
According to some embodiments of the invention, the mixing is at a stirring rate of 1600r/min to 2000r/min. Further, the mixing time is 1min-10min, and further 2min-6min.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a physical view of the hair-growth powder produced in example 1 of the present invention.
Detailed Description
The following detailed description of embodiments of the invention is exemplary and is not intended to limit the invention, but is merely illustrative of the invention.
Hereinafter, silica (trade name: aerosil R812S) is purchased from Ying-Summit International trade (Shanghai) Inc., the SiO2 content of silica is not less than 99.8%; VP/acrylic acid (ester) copolymer/lauryl methacrylate (trade name: PA-112) was purchased from Guangdong Polyon Fine chemical Co., ltd; titanium dioxide was purchased from Hebei Masen titanium dioxide Co., ltd; black pigment CI 77499 was purchased from the guangzhou market politics chemical technology limited. Other raw materials are commercially available conventional raw materials unless otherwise specified.
The invention screens the powder type, the powder specific surface area, the water-powder ratio and the dosage of the binder, and obtains the hair coarse powder which has strong adsorption capacity to hair, durable thickening effect and difficult moisture absorption through reasonable formula design. The thickening effect can be initiated on the head, meanwhile, the thickening effect is natural, moisture is not easy to absorb, the thickening agent can be used in rainy and foggy days, and the phenomenon of aggregation after moisture absorption is avoided.
1. Powder screening
The purpose is to obtain powder with excellent hydrophobicity and improve the moisture absorption resistance of the hair coarse powder. The cellulose powder, corn starch, talcum powder, silica, perlite, calcium carbonate, high collar soil and titanium dioxide are respectively mixed and stirred uniformly according to the weight ratio of water to powder of 1:1, the properties after mixing are observed, and the experimental results are shown in table 1.
TABLE 1
| Powder type | Experimental phenomena and conclusions |
| Cellulose powder | The powder and water are stirred and mixed to form mud, which indicates that the powder and water can be mutually dissolved and have moisture absorption |
| Corn starch | The powder and water are stirred and mixed to form mud, which indicates that the powder and water can be mutually dissolved and have moisture absorption |
| Talc powder | The powder and water are stirred and mixed to form mud, which indicates that the powder and water can be mutually dissolved and have moisture absorption |
| Silica (silica) | The powder and the water are not mutually dissolved after being stirred, and the powder and the water are mutually separated, which shows that the water-repellent performance is realized |
| Perlite | The powder and water are stirred and mixed to form mud, which indicates that the powder and water can be mutually dissolved and have moisture absorption |
| Calcium carbonate | The powder and water are stirred and mixed to form mud, which indicates that the powder and water can be mutually dissolved and have moisture absorption |
| Kaolin clay | The powder and water are stirred and mixed to form mud, which indicates that the powder and water can be mutually dissolved and have moisture absorption |
| Titanium dioxide | The powder and the water are not mutually dissolved after being stirred,the powder and water are separated from each other, indicating hydrophobicity |
From the experimental results, it can be seen that the cellulose powder, corn starch, talcum powder, perlite, calcium carbonate and kaolin absorb moisture obviously, and in comparison, the silica and titanium dioxide have hydrophobicity and can be more suitable for being used as carriers of the hair coarse powder, so that the silica and the titanium dioxide are used as the powder of the hair coarse powder for subsequent research.
2. Powder specific surface area screening
a. Mixing state of water and powder
Mixing powder with different specific surface areas with water according to a weight ratio of 1.5:1, stirring uniformly at high speed under the same condition by using a high-speed powder stirring machine, wherein the stirring speed is 1600-2000 r/min, stirring for 5min, and observing the powder state. Wherein the powder is selected from: silica (specific surface area 160m 2 /g、190m 2 /g、220m 2 /g、250m 2 /g、280m 2 Titanium dioxide (specific surface area 160 m) 2 /g、190m 2 /g、220m 2 /g、250m 2 /g、280m 2 /g). The experimental results are shown in table 2.
TABLE 2
From the experimental results, it was found that titanium dioxide and water hardly form a state in which powder is coated with water, and therefore, it is not suitable as a powder for hair-thickening powder. The specific surface area of the silica is 160m 2 /g、190m 2 At/g, water-powder separation occurs. The specific surface area of the silica is 220m 2 /g、250m 2 /g、270m 2 At/g, the powder may be in a state of coating water. This is because the powder has a small specific surface area, which reduces the contact area between the powder and water, and is disadvantageous in achieving a state where water and powder coexist.
b. Influence of specific surface area of powder on thickening effect
Will have a specific surface area of 220m 2 /g、250m 2 /g、280m 2 The silica/g was blended with black pigment CI 77499 to give black powder (mass ratio silica: CI 77499: 175:1), and the black powder was labeled powder A, powder B, and powder C in this order. 30 women with thinner, softer, approximately the same hair quality and approximately the same hair length were selected as volunteers. The hair of volunteers was divided into two sides, and a hair area of 5cm x 5cm was selected at a fixed position on the left side for use with the powder to evaluate thickening effects. The right side correspondingly selects the hair area with the fixed position of 5cm x 5cm as a blank control.
30 volunteers were uniformly given the same style and size comb. When the volunteer uses, 0.2g of powder is placed in a hair area of 5cm x 5cm fixed on the left, and hair is combed back and forth for 5 times by using a comb, so that the hair is thickened uniformly, wherein the powder A, the powder B and the powder C are continuously tried for five days. And then comparing the hair thickening effect and the thickening naturalness of the powder according to the hair thickening position and the blank control region, and scoring the hair thickening effect and the thickening naturalness.
Wherein, the thickening effect means: whether the hair became thicker after application of the coarsening powder or not was visually observed. Thickening naturalness means: after the hair is thickened, the color is natural, and the hair is not obvious to be caused by using the coarse powder of the hair. The use effect of each group of hair thickening powder on each day is compared and scored, the total thickening effect score is 100, the higher the score is, the better the thickening effect is, the lower the score is, and the worse the thickening effect is. The total thickening naturalness is divided into 100 points, and the higher the score is, the higher the naturalness is, and the lower the score is, the lower the naturalness is. The experimental results are shown in table 3.
TABLE 3 Table 3
| Coarse powder for hair | Thickening effect evaluationDividing into | Thickening naturalness score |
| A | 93.51 | 91.64 |
| B | 78.07 | 95.93 |
| C | 64.83 | 97.46 |
From the experimental results, it can be seen that powder A (220 m 2 The average of the thickening effect on the hair was 93.51 and the average of the thickening naturalness was 91.64. The powder A has moderate specific surface area and is suitable for being used as hair coarse powder. Powder B (250 m) 2 Per g of silica) the average thickening effect on hair was 78.07, with a thickening naturalness of 95.93; powder C (280 m) 2 And/g) the average thickening effect on the hair is 64.83, the thickening naturalness is 97.46, which shows that the specific surface area of the powder B and the specific surface area of the powder C are large, the corresponding particle size of the powder are small, and the thickening effect on the hair is poor. However, the specific surface area of the powder is large, the particle size of the powder is small, and after the hair is thickened, the color is natural, and the hair is not found to be caused by using the coarse powder, so that the naturalness score is high. Synthesizing experimental results, and selecting a specific surface area of 220m 2 Silica of about/g was subjected to subsequent experiments.
According to the same test method as above, a specific surface area of 210m was selected 2 /g、230m 2 Silica per gram, respectively designated powder A 1 (210m 2 Powder A 2 (230m 2 /g) comparative tests were carried out to further investigate the specific surface area range available for silica. The experimental results are shown in table 4.
TABLE 4 Table 4
| Coarse powder for hair | Thickening effect scoring | Thickening naturalness score |
| A | 93.51 | 91.64 |
| A 1 | 94.90 | 89.06 |
| A 2 | 90.12 | 93.28 |
As can be seen from the experimental results, the specific surface area of the silica is 210m 2 /g、220m 2 /g、230m 2 At/g, the thickening effect and the thickening naturalness score of the hair are higher. The specific surface area of silica is 220m only 2 By way of example, the proportion of the components of the hair-coarsening powder according to the invention is determined.
The test judges the thickening effect of the powder mainly through the sensory feel of volunteers, and the problems of whether the thickening effect of the powder is durable, whether moisture absorption is easy and the like are not considered.
3. Component ratio optimization
a. Ratio of water to powder
(1) Hybrid state testing
According to the weight ratio of 1:0.2, 1:0.4, 1:0.6, 1:0.8, 1:1,Water and silica (specific surface area 220 m) were weighed 1:1.2, 1:1.4, 1:1.6, 1:1.8, 1:2, respectively 2 Per g) ten experiments were performed. Wherein, water and silica are mixed according to the weight ratio, and then uniformly stirred by a high-speed powder stirrer, the stirring speed is 1600r/min-2000r/min, the stirring is 5min, and the mixture state is observed, and the result is shown in Table 5.
TABLE 5
From the experimental results, when the weight ratio of water to silica was 1:0.2, 1:0.4, 1:0.6, 1:0.8, 1:1, the mixture state was a uniform powder state in which silica was wrapped with water, and a part was water. The silica content is low, the water is difficult to completely wrap, and the phenomenon of water-powder separation occurs. When the weight ratio of water to silica is 1:1.2, 1:1.4, 1:1.6, 1:1.8, the mixture state is a uniform powder state of silica coating water, and the water-powder ratio in the range is better. When the weight ratio of water to silica is 1:2, the mixture is in a uniform powder state in which silica is wrapped in water, and the mixture is in a state in which silica is partially wrapped in water, which means that the water amount is insufficient, and it is difficult to make all the silica wrap in water, so that the powder uniformity is affected. Comprehensive experimental results, the weight ratio of water to silica was selected as 1:1.2, 1:1.4, 1:1.6, 1:1.8 as further screening subjects.
(2) Stability test
After determining the appropriate weight ratio of water to silica, stability tests were performed to assess whether the mixture would exhibit water-powder separation under shipping shock or high and low temperature conditions.
And (3) vibration test: water and silica (specific surface area 220m 2 And/g) uniformly stirring by a high-speed powder stirrer at a stirring speed of 1600-2000 r/min for 5min. Placing the obtained mixture into a centrifuge tube, centrifuging in the centrifuge with parameters of 3000r/min and 30min, and observing centrifugingThe mixture state after that.
High and low temperature stability test: the preparation method of the mixture is the same as vibration test, the mixture is filled into two sample bottles, one sample bottle is placed in a biochemical incubator at 45+/-1 ℃ for heat resistance test, and the other sample bottle is placed in a refrigerator at 0+/-1 ℃ for cold resistance test. After a lapse of 72 hours, the sample was taken out, returned to room temperature, and the appearance of the mixture was observed. The experimental results are shown in table 6.
TABLE 6
From the experimental results, when the weight ratio of water to silica is 1:1.2, the oscillation test and the high-low temperature test have water outlet phenomenon; when the weight ratio of water to silica is 1:1.4, the vibration test shows water outlet although the high and low temperature test shows no water outlet. And when the weight ratio of water to silica is 1:1.6 and 1:1.8, the vibration test and the high and low temperature test have no water outlet phenomenon, which shows that the weight ratio has obviously higher stability. The component proportions of the hair meal of the present invention are determined below by way of example only, with a weight ratio of water to silica of 1:1.8.
b. Proportion of adhesive to water and powder
(1) Hybrid state testing
Fixing water and silica (specific surface area 220m 2 The weight ratio of/g) is 1:1.8, and more proper component proportions are screened by changing the dosage of VP/acrylic acid (ester) copolymer/lauryl alcohol methacrylate copolymer.
Ten experiments were performed by weighing the raw materials according to the weight ratios of water, silica, VP/acrylic acid (ester) copolymer/lauryl methacrylate of 1:1.8:0.2, 1:1.8:0.4, 1:1.8:0.6, 1:1.8:0.8, 1:1.8:1.2, 1:1.8:1.4, 1:1.8:1.6, 1:1.8:1.8, 1:1.8:2, respectively. Mixing the above materials, stirring with high-speed powder mixer at 1600-2000 r/min for 5min. The mixture was observed. The experimental results are shown in table 7.
TABLE 7
From experimental results, when the weight ratio of the water to the silica to the VP/acrylic acid (ester) to the laurylmethacrylate copolymer is 1:1.8:0.2, 1:1.8:0.4 and 1:1.8:0.6, the mixture is in a uniform powder state, and the mixture is in a powder state when being smeared, so that the thickening naturalness is more beneficial to being ensured. When the weight ratio of water, silica and VP/acrylic acid (ester) copolymer/laurylmethacrylate is 1:1.8:0.8 and 1:1.8:1, the mixture is in a uniform powder state, and the powder is aggregated into a bulk shape when the mixture is smeared. When the weight ratio of water to silica, VP/acrylic acid (esters) and laurylmethacrylate copolymer is 1:1.8:1.2, 1:1.8:1.4, 1:1.8:1.6, 1:1.8:1.8 and 1:1.8:2, the mixture is in a state that the powder is aggregated, which indicates that too much adhesive can affect the state of the powder. Therefore, the adhesion test was performed by selecting water, silica, and VP/acrylic acid (ester) copolymer/lauryl methacrylate copolymer in a weight ratio of 1:1.8:0.2, 1:1.8:0.4, and 1:1.8:0.6.
(2) Adhesion test
Water, silica (specific surface area 220m 2 After mixing the VP/acrylic acid (ester) copolymer and the laurinol methacrylate copolymer according to the weight ratio of 1:1.8:0.2, 1:1.8:0.4 and 1:1.8:0.6 respectively, stirring uniformly by a high-speed powder stirring machine at the rotating speed of 1600r/min-2000r/min for 5min. The obtained mixture is marked as a mixture B, a mixture C and a mixture D in sequence; the water and silica were mixed in the same manner using a weight ratio of 1:1.8 as a blank, and the resulting mixture was labeled as mixture A.
Hair of uniform thickness and length is purchased from a store. 800 hairs were taken and divided into 4 groups of 200 hairs each. Each group of hair was bundled with a string and marked for use with hair a, hair B, hair C, hair D. 0.5g of each of the mixture A, the mixture B, the mixture C and the mixture D is weighed and uniformly smeared on the hair with corresponding numbers. A blank A4 paper with known quality is respectively placed under each set of smeared hair, wigs are combed by using the same force and the same comb, and each set of wigs are combed ten times. The mass of the A4 paper corresponding to each group of hair is weighed, and the weight added by each of the four pieces of A4 paper is calculated to be the weight of the corresponding hair coarse powder falling off.
The adsorption effect of the hair-setting powder was judged according to the increased weight of the A4 paper. The experimental results are shown in table 8.
TABLE 8
From the experimental results, it can be seen that the A4 paper increases the weight most if the adhesive VP/acrylic/lauryl methacrylate copolymer is not added, indicating that the coarse powder is easily detached without the adhesive. Increasing the amount of adhesive added, the A4 paper increased less and less weight, indicating that the use of adhesive increased the adhesion of the coarser powder to the hair. Combining (1) the mixed state test and (2) the adhesion test results, preferably water: the adhesive ratio is about 1:0.6.
The water was further tested in the same way: the adhesion of the hair meal was 1:0.55 and 1:0.65 with the adhesive, and the experimental results are shown in Table 9.
TABLE 9
From the experimental results, it can be seen that when water: the proportion of adhesive is 1: (0.55-0.65), the mixture state and the adhesiveness are good.
In practical application, pigment can be further added to make the color of the coarse powder of hair approximate to the color of hair, and increase the natural degree of hair thickening. Preservatives such as potassium sorbate and sodium benzoate can also be added to play a role in bacteriostasis.
The effect of the hair tonic of the present invention will be further described below by way of specific examples only.
Example 1
This example provides a hair meal comprising the following components:
the preparation process of the hair-thickening powder comprises the following steps: the components are weighed according to the proportion, placed in a high-speed powder stirring machine and stirred for 5min at a high speed under the rotating speed of 1600r/min-2000r/min.
The properties of the obtained hair-thickening powder are shown in fig. 1, and the powder is fluffy powder. Designated as hair-setting powder a.
Example 2
The ratio by weight of water to silica was 1:1.6, as compared to example 1, the others being unchanged. The dosages of the components are as follows:
the obtained powder is denoted as hair-growth promoting coarse powder A 1 。
Example 3
The weight ratio of water to adhesive was 1:0.55, the others being unchanged compared to example 1. The dosages of the components are as follows:
the obtained powder is denoted as hair-growth promoting coarse powder A 2 。
Comparative example 1
Three types of hair-setting powder with better commercial evaluation are respectively marked as hair-setting powder B, hair-setting powder C and hair-setting powder D.
Comparative example 2
As compared with example 1, VP/acrylic acid (ester) copolymer/laurylmethacrylate was replaced with butyl acrylate/ethylhexyl methacrylate copolymer (brand: PA-69, available from Guangdong Polylon FineChemical industry limited), others are unchanged. The resulting mixture was designated hair-setting powder A 3 。
Comparative example 3
Compared with example 1, the silica was replaced with an equivalent specific surface area of 220m 2 Titanium dioxide/g, the others being unchanged. The resulting mixture was designated hair-setting powder A 4 。
Test case
The test examples were used to test the durability, thickening naturalness, and moisture absorption resistance of hair thickening powders.
Test example 1: durability test
The durability of the hair-setting powder is related to the adhesiveness, the better the adhesiveness, the relatively better the durability. Conversely, the less good the adhesion, the poorer the durability. Therefore, the experiment reflects the persistence of the hair by increasing the adhesiveness of the powder.
Hair of uniform thickness and length is purchased from a store. 1600 hairs are taken and divided into 8 groups of 200 hairs. Tying each group of hair into a bundle with rope, and marking hair A and hair A 1 Hair A 2 Hair A 3 Hair A 4 Hair B, hair C, hair D for future use. Respectively weighing hair coarse powder A and hair coarse powder A 1 Coarse powder A for hair 2 Coarse powder A for hair 3 Coarse powder A for hair 4 The hair-thickening powder B, the hair-thickening powder C and the hair-thickening powder D are respectively 0.5g and uniformly coated on the hair with corresponding numbers. A blank A4 paper with known quality is respectively placed under each set of smeared hair, wigs are combed by using the same force and the same comb, and each set of wigs are combed ten times. The mass of the A4 paper corresponding to each group of hair is weighed, and the weight added by eight pieces of A4 paper respectively is calculated, namely the weight of the corresponding hair coarse powder falling off.
The adsorption effect of the hair-setting powder was judged according to the increased weight of the A4 paper. The experimental results are shown in table 10.
Table 10
As can be seen from the experimental results, A (example 1), A 1 (example 2) and A 2 The hair extension of example 3 showed that the inventive hair extension had the best adhesion, i.e., good durability, with the least weight increase of A4 paper compared to other commercially available hair extension powders. A is that 3 Comparative examples 2 and A 4 (comparative example 3) corresponds to changing the adhesive or powder to another material, and corresponds to a great increase in weight of A4 paper, indicating that both the adhesive and the powder type affect adhesion.
Test example 2: coarsening effect and naturalness test
30 women with thinner, softer, approximately the same hair quality and approximately the same hair length were selected as volunteers. The hair of volunteers was divided into two sides, the left side selected a hair area with a fixed position of 5cm x 5cm for use with one commercially available hair-thickening powder, and the right side correspondingly selected a hair area with a fixed position of 5cm x 5cm for use with hair-thickening powder a. The method comprises the following steps:
30 volunteers were uniformly given the same style and size comb. The volunteer can take 0.2g of hair-thickening powder (B or C or D or A) 1 Or A 2 ) 0.2g of hair thickening powder A is respectively placed in a 5 cm-5 cm hair area fixed on the left side and the right side, and hair is combed back and forth for 5 times by a comb, so that the hair is thickened uniformly. Wherein, the hair-up coarse powder A and the hair-up coarse powder B are compared for five days, the hair-up coarse powder A and the hair-up coarse powder C are compared for five days, the hair-up coarse powder A and the hair-up coarse powder D are compared for five days, and the hair-up coarse powder A are respectively prepared 1 Comparing the hair coarse powder A with the hair coarse powder A for five days 2 The comparison was used for five days. Volunteers judge the thickening effect and the thickening naturalness of the powder through sensory feel. The thickening effect means: whether the hair became thicker after application of the coarsening powder or not was visually observed. Thickening naturalness means: after the hair is thickened, the color is natural, and the hair is not obvious to be caused by using the coarse powder of the hair. For each group of hair, coarse powder is addedThe use effect of each day is subjected to comparison scoring, the total thickening effect score is 100 minutes, the higher the score is, the better the thickening effect is, the lower the score is, and the worse the thickening effect is. The total thickening naturalness is divided into 100 points, and the higher the score is, the higher the naturalness is, and the lower the score is, the lower the naturalness is.
According to 30 volunteers, hair-setting powder A, hair-setting powder B, hair-setting powder C, hair-setting powder D and hair-setting powder A were used 1 Coarse powder A for hair 2 Summarizing the post-filled test sheet cases, scoring average scores of volunteers of each hair-boost powder, and the results are shown in Table 11:
TABLE 11
| Coarse powder for hair | Thickening effect scoring | Thickening naturalness score |
| A | 98.3 | 95.7 |
| B | 72.2 | 80.6 |
| C | 80.4 | 70.9 |
| D | 69.5 | 76.8 |
| A 1 | 97.9 | 95.5 |
| A 2 | 98.2 | 95.6 |
As can be seen from the experimental results, the hair-thickening powder of the present invention is significantly better in thickening effect and thickening naturalness than other commercially available hair-thickening powders. A is that 1 (example 2) and A 2 (example 3) and A (example 1) have a coarsening effect score and a coarsening naturalness score which indicate that the durability is better when the ratio of water to silica is 1 (1.6-1.8) and the ratio of water to adhesive is 1 (0.55-0.65).
Test example 3: moisture absorption resistance test
20 women with thinner, softer, approximately identical hair and approximately identical hair length were selected as volunteers and randomly divided into four groups, labeled as group a, group B, group C, and group D, using hair-thickening powder A, B, C, D, respectively.
Four humidifiers with the same model are respectively placed in four rooms with the same size, the humidifiers are respectively turned on, and the same humidification mode is selected, so that the humidity of the room is stabilized at 60%.
After the volunteers of each group had used the hair to increase the coarse powder, they were allowed to sit quietly in a room with a humidifier on for 2 hours, and after 2 hours, the hair was observed for the presence of moisture absorption and agglomeration. The experimental results are shown in table 12.
Table 12
| Coarse powder for hair | Number of volunteers with moisture absorbing clumps of hair-thickening powder |
| A | 0 |
| B | 5 |
| C | 8 |
| D | 6 |
From the experimental results, only the hair powder of the invention does not generate moisture absorption and agglomeration phenomenon in a humid environment. The three hair coarse powder products sold in the market can absorb moisture and form clusters in a humid environment.
In conclusion, the hair thickening powder disclosed by the invention is superior to the commercial hair thickening powder in the aspects of thickening effect, thickening durability, naturalness and moisture absorption resistance of hair, and effectively overcomes the limitations of the conventional commercial hair thickening powder.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
Claims (10)
1. A hair-setting powder characterized in that: the composite material comprises the following components in percentage by weight: water: silica: VP/acrylic acid (esters) copolymer/laurylmethacrylate=1 (1.6-1.8): (0.55-0.65), the specific surface area of the silica is 210m 2 /g-230m 2 /g。
2. The hair meal of claim 1 wherein: by a means ofThe specific surface area of the silica is 220m 2 /g-230m 2 /g。
3. The hair meal of claim 1 wherein: the weight ratio of the water to the VP/acrylic acid (ester) copolymer/lauryl alcohol methacrylate copolymer is 1:0.6-0.65.
4. The hair meal of claim 1 wherein: pigments are also included.
5. The hair meal of claim 4 wherein: the pigment is used in an amount of 0.1% -1% by weight of the total weight of the hair-thickening powder.
6. The hair meal of claim 1 wherein: also comprises a preservative.
7. The hair meal of claim 6 wherein: the preservative is used in an amount of 0.1% -1% by weight of the total weight of the hair-setting powder.
8. A process for preparing a hair meal as claimed in any one of claims 1 to 7 wherein: the method comprises the following steps: the components were mixed.
9. The method of manufacturing according to claim 8, wherein: the mixing is carried out at a stirring rate of 1600r/min to 2000r/min.
10. The method of manufacturing according to claim 9, wherein: the mixing time is 1min-10min.
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| CN103550073A (en) * | 2013-10-25 | 2014-02-05 | 拉芳家化股份有限公司 | Elastic emulsion for increasing hair volume |
| WO2014091012A1 (en) * | 2012-12-14 | 2014-06-19 | L'oreal | Cosmetic composition in powder form comprising a (meth)acrylic thickening polymer, a fixing polymer and water-insoluble particles |
| CN104023695A (en) * | 2011-11-09 | 2014-09-03 | 欧莱雅 | Compositions And Methods For Altering The Appearance Of Hair |
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| FR2982147B1 (en) * | 2011-11-07 | 2014-03-21 | Oreal | OIL-CONTINUOUS PHASE COMPOSITION CONTAINING AT LEAST ONE LIPOPHILIC ORGANIC UV FILTER AND HYDROPHOBIC SILICA AEROGEL PARTICLES. |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104023695A (en) * | 2011-11-09 | 2014-09-03 | 欧莱雅 | Compositions And Methods For Altering The Appearance Of Hair |
| WO2014091012A1 (en) * | 2012-12-14 | 2014-06-19 | L'oreal | Cosmetic composition in powder form comprising a (meth)acrylic thickening polymer, a fixing polymer and water-insoluble particles |
| CN103550073A (en) * | 2013-10-25 | 2014-02-05 | 拉芳家化股份有限公司 | Elastic emulsion for increasing hair volume |
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