CN113667358A - Color paste for low-odor UV (ultraviolet) nail polish gel and preparation method thereof - Google Patents
Color paste for low-odor UV (ultraviolet) nail polish gel and preparation method thereof Download PDFInfo
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- CN113667358A CN113667358A CN202111000560.3A CN202111000560A CN113667358A CN 113667358 A CN113667358 A CN 113667358A CN 202111000560 A CN202111000560 A CN 202111000560A CN 113667358 A CN113667358 A CN 113667358A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D17/00—Pigment pastes, e.g. for mixing in paints
- C09D17/002—Pigment pastes, e.g. for mixing in paints in organic medium
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Abstract
The invention provides color paste for a low-odor UV (ultraviolet) nail polish gel, which comprises the following components in parts by weight: 5-20 parts of resin, 25-35 parts of reactive diluent, 0.5-2 parts of anti-settling agent, 2-6 parts of wetting dispersant and 1-60 parts of pigment; the invention also provides a preparation method of the color paste for the low-odor UV nail polish glue. The color paste for the low-odor UV nail polish glue has the good performances of high safety, low odor, moderate viscosity, good compatibility, strong universality, good storage stability, good color development, bright color and the like.
Description
Technical Field
The invention relates to color paste for low-odor UV nail polish gel and a preparation method thereof, and is applied to the technical field of nail beautification.
Background
At present, color paste is an important component in a nail polish glue formula, different appearance color effects can be given to the nail polish glue by selecting various color pastes, nails with different colors can be obtained after photocuring, and the requirements of different customers on nail appearance colors are met. Three factors need to be paid attention to in particular for preparing the color paste, the first is that the color paste system has good compatibility and high storage stability, and the phenomena of caking, sedimentation and the like can not occur during storage; secondly, the prepared color paste has good compatibility and stability with a nail polish base material system, and the phenomena of flooding, floating, chromatic aberration and the like cannot occur; and thirdly, after the color paste is added into the body-coating base material system, the original performances of the body-coating base material system cannot be adversely affected.
Generally, the color paste for the nail polish glue consists of resin, reactive diluent, anti-settling agent, wetting dispersant, pigment and the like. The color paste used in the domestic nail polish glue industry is generally divided into two types, one type is a resin color paste, and as the used resin emphasizes on the film-forming property and ignores the wetting dispersibility of the resin on the pigment, too much wetting dispersant is often added to enable the pigment to be completely wetted and dispersed, so that the prepared color paste has the problem of large odor; the other is resin-free color paste, the main components are solvent and wetting dispersant, the prepared color paste often has the problems of too low viscosity, large smell and the like, and because the wetting dispersant does not participate in the photocuring reaction, the excessive wetting dispersant can generate certain negative influence on the final film-forming property of the nail polish gel when being dissociated in the system. Therefore, a resin with film-forming property and pigment wetting dispersibility is required to be found for preparing the color paste for obtaining the low-odor UV nail polish glue.
In addition, in the aspect of pigment, as the domestic nail polish gum industry develops later, the nail polish gum is popularized and used in the domestic market in the next half year of 2009, and compared with the United states, European Union and the like, the domestic nail polish gum is lack of regulations on the safety of raw material use and still needs to be continuously improved. Therefore, most of pigments of color pastes used in current domestic nail polish glue are industrial pigments which have strong color rendering property and durability without fading and are low in price. Although the nail polish gel is coated on the fingernails or toenails of human bodies and does not directly contact with the skin, harmful substances in the color paste can slowly permeate into the skin through the horny layer even if the nail polish gel color paste of the industrial pigment is used for a long time, and the nail polish gel can cause certain harm to the health of the human bodies after a long time. Therefore, the pigment with high safety and meeting the requirements of cosmetic raw materials is required to be selected for preparing the color paste for the UV nail polish gel.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the color paste for the low-odor UV nail polish gel and the preparation method thereof, and the color paste has the good performances of high safety, low odor, moderate viscosity, good compatibility, strong universality, good storage stability, good color development, bright color and the like.
The invention is realized by the following steps:
the invention provides color paste for low-odor UV (ultraviolet) nail polish gel, which comprises the following components in parts by weight:
resin 5-20
Active diluent 25-35
0.5-2 parts of anti-settling agent
Wetting dispersant 2-6
1-60 parts of pigment.
Further, the resin is ricinoleic acid modified polyurethane acrylate.
Further, the main structure of the resin is:
wherein R:
。
further, the reactive diluent is acrylate monomers.
Further, the anti-settling agent is fumed silica.
Further, the wetting dispersant is modified polyether containing high pigment affinity group.
Further, the pigment is a cosmetic pigment.
The invention also provides a preparation method of the color paste for the low-odor UV nail polish glue, which comprises the following steps:
the method comprises the following steps: accurately weighing the resin, the reactive diluent and the anti-settling agent, adding the resin, the reactive diluent and the anti-settling agent into a dry container, and stirring and dispersing by using a high-speed dispersion machine;
step two: and (3) adding a wetting dispersant and a pigment into the mixture obtained in the step one, grinding by using a ceramic three-roll grinder, measuring the fineness of the ground material body by using a scraper fineness meter, and stopping grinding when the fineness is below 20 mu m to obtain the color paste for the low-odor UV nail polish gel.
The invention has the following beneficial effects:
(1) the compatibility is good. By selecting ricinoleic acid modified polyurethane acrylate as resin, acrylate hydroxyl ester monomer as reactive diluent and modified polyether containing high pigment affinity group as wetting dispersant, the components can fully disperse and wet the pigment, so that the prepared color paste does not have abnormal phenomena of flooding, floating, thickening and the like, and has the characteristic of good compatibility;
(2) the universality is strong. A ricinoleic acid-modified urethane acrylate is selected as a resin, which contains a fatty acid and a hydroxyl group and has good wettability to a pigment. The modified resin still contains urethane bonds in the structure, and has good compatibility with common resin of the nail polish gum base material, so that the prepared color paste has strong universality and can be basically applied to various nail polish gum base materials;
(3) the storage stability is good. The pigment can be fully wetted and dispersed and is not easy to aggregate by selecting the wetting dispersant of the modified polyether containing the high pigment affinity group; and the problem of pigment sedimentation is effectively solved by selecting the anti-sedimentation agent fumed silica. Through reasonable selection of the two additives and reasonable addition amount, the prepared color paste does not have the adverse phenomena of sedimentation, caking, flocculation, layering and the like during storage;
the safety is high. The raw materials used for producing the color paste are subjected to strict safety evaluation, have no stimulation to a human body, participate in photocuring reaction, have no micromolecule substances after curing, have no migration, and avoid the damage to the human body.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides color paste for low-odor UV (ultraviolet) nail polish glue, the adjustable range of the content of each substance in the formula is wider, and the color paste preferably comprises the following components in parts by weight:
resin 5-20
Active diluent 25-35
0.5-2 parts of anti-settling agent
Wetting dispersant 2-6
1-60 parts of pigment.
The resin is ricinoleic acid modified polyurethane acrylate, the reactive diluent is acrylic hydroxyl ester monomer, the anti-settling agent is fumed silica, the wetting dispersant is modified polyether containing high pigment affinity groups, and the pigment is a pigment for cosmetics.
In the preferred embodiment, the reactive diluent can be selected from hydroxyethyl methacrylate (HEMA), hydroxypropyl methacrylate (HPMA), and hydroxybutyl 4-acrylate (4-HBA), the anti-settling agent can be selected from H15, H20, H30 in Wake, Germany, and R974 in Degussa, the wetting and dispersing agent can be selected from TEGO-655, TEGO-656 in Degao, and the pigment can be selected from inorganic pigments or organic pigments.
The following description will be made by specific examples.
Selecting raw materials.
(1) Selection of resin:
the resin in the formula of the invention is ricinoleic acid modified polyurethane acrylate. Ricinoleic acid belongs to one of fatty acids, ricinoleic acid and hydroxyl in the structure are favorable for wetting stability of resin on pigment, and the prepared color paste is not easy to generate adverse phenomena of precipitation, flooding, flowering and the like after being added into a base material. Meanwhile, the resin structure still contains urethane bonds, so that the resin structure has good compatibility with common resin of the nail polish base material, and the prepared color paste has universality; and the resin has good film forming property, and can not generate negative influence on the performance of a nail polish gel base material system. The resin is any amount which can ensure that the whole color paste system keeps certain viscosity and has good compatibility, and preferably, the amount of the resin is 5 to 20 parts by weight.
The synthesis method of the ricinoleic acid modified polyurethane acrylate comprises the following steps:
adding trimethylolpropane, ricinoleic acid and a catalyst dibutyltin dilaurate into a dry four-neck flask provided with a stirrer, a reflux condenser tube and a thermometer in a certain proportion, heating to 80 ℃ while stirring, then dropwise adding accurately metered isophorone diisocyanate (IPDI), carrying out a constant temperature reaction for a period of time, sampling and detecting the content of-NCO, and finishing the first-step reaction when the content of-NCO reaches a designed value;
secondly, dropwise adding hydroxyethyl methacrylate (HEMA), a catalyst dibutyltin dilaurate and a polymerization inhibitor hydroquinone into the four-neck flask according to a certain proportion, controlling the temperature at 60-65 ℃, sampling and detecting the NCO content after reacting for a period of time, and stopping the reaction when the NCO content reaches a designed value to obtain the ricinoleic acid modified polyurethane acrylate.
The main synthetic route of the ricinoleic acid modified polyurethane acrylate is as follows:
the first step is as follows:
the second step is that:
wherein R:
。
(2) selection of reactive diluents:
the reactive diluent in the formula of the invention is selected from acrylic hydroxy ester monomers, and can be selected from hydroxyethyl methacrylate (HEMA), hydroxypropyl methacrylate (HPMA) and 4-hydroxybutyl acrylate (4-HBA). HEMA, HPMA and 4-HBA are monofunctional reactive diluents, low viscosity, low odor, low irritation, and good pigment wetting. The amount of the reactive diluent is any amount which can achieve good dispersion effect of the pigment, and preferably, the amount of the reactive diluent is 25 to 35 parts by weight.
(3) Selecting an anti-settling agent:
the anti-settling agent in the formula of the invention is fumed silica, and H15, H20 and H30 in Wake, Germany and R974 in Degussa, Germany can be selected. Fumed silica is an ideal anti-settling agent, and the hydrogen bond structure formed by the fumed silica is very uniform and stable and is a three-dimensional network structure. Therefore, the fumed silica is very effective for solving the problem of pigment precipitation in a color paste system, the stability of the color paste can be greatly improved by proper addition amount, the using amount of a wetting dispersant can be reduced, the applicability of the color paste is improved, and the influence of the color paste on a base material system is reduced. However, if the amount of the pigment is too large, the thixotropic property of the system is strong, and the edge dispersion shear force is insufficient during dispersion, so that the pigment is frozen, and the dispersion efficiency of the pigment is affected. The amount of the fumed silica of the present invention is any amount that can maintain sufficient stability of the pigment in the system, and preferably, the anti-settling agent is used in an amount of 0.5 to 2 parts by weight in parts by weight.
(4) Selection of wetting dispersant:
the wetting dispersant in the formula of the invention selects modified polyether containing high pigment affinity group, and can select TEGO-655 and TEGO-656 of Germany dike. The wetting and dispersing agent plays a role in shortening the pigment grinding time and stabilizing the pigment. The wetting dispersant selected by the invention contains more pigment affinity groups, can generate stronger binding force on the surface of pigment particles, ensures the complete wetting and stability of inorganic and organic pigments, namely improves the dispersion efficiency and storage stability of the pigments, and prevents the pigments from caking, settling, flocculating and the like in the preparation, storage, transportation and use processes.
When the dosage of the wetting dispersant is too small, the wetting dispersant can not form a complete adsorption layer on the surface of the pigment particles, exposed parts exist on the surface of the pigment, and the exposed pigment surfaces attract each other, so that the dispersed pigment is aggregated again. When the amount of the wetting dispersant is proper, the surface of the pigment can gradually form a complete adsorption layer, so that the steric hindrance between the pigments is gradually increased, the tendency of the dispersed pigments to automatically aggregate is reduced, the aggregation and the deaggregation of the pigments are balanced, and the average particle size of the pigments can be maintained in a small state. When the amount of the wetting dispersant is too large, the viscosity of the system is increased, the wettability to the pigment is deteriorated, the deaggregation process of the pigment is hindered, the dispersing effect of the pigment is reduced, and the free wetting dispersant molecules bridge between the pigments to cause flocculation of the pigment, thereby causing an increase in the average particle size of the pigment. Therefore, the amount of the wetting and dispersing agent of the present invention is any amount that can achieve the optimal wetting state of the pigment particles, and preferably, the amount of the wetting and dispersing agent is 2 to 6 parts by weight based on the parts by weight.
(5) Selection of pigment:
the pigment in the formula of the invention is selected from cosmetic pigments, and inorganic pigments or organic pigments can be selected. The pigment endows the color paste with certain hue and covering power. Cosmetic pigments are pigments which, in the foreseeable case, do not pose a risk to human health and which comply with the legislation relating to cosmetics. Generally, inorganic pigments are generally chosen for the black and white pigments, carbon black being the predominant black pigment and titanium dioxide being the predominant white pigment. The color pigment can be selected from inorganic or organic pigments, the inorganic pigments include iron oxide, bismuth vanadate, strontium chromate, iron blue, chrome green, etc., and the organic pigments include phthalocyanine, quinacridone, azo, anthraquinone, benzimidazolone, perylene tetracarboxylic diimide, etc. The pigment is used in any amount which can make the color paste show the required color, preferably, the pigment is 1 to 40 parts by weight according to the weight part ratio, and the color required by the color paste can be prepared by mixing a plurality of pigments.
The invention selects a plurality of pigments commonly used in cosmetics, and the product models of manufacturers in the following table are all in accordance with the use requirements of the pigments in annex IV of European Union cosmetic code (EC) No 1223/2009, 70-82 parts of chapter 21 of the U.S. Federal regulations (CFR) and the Chinese 2007 cosmetic hygienic standard.
(II) formulation compositions of examples 1-7.
Examples 1-7 were prepared according to the following procedure:
(1) accurately weighing the resin, HEMA and R974, adding into a dry container, stirring and dispersing with a high-speed dispersion machine, and stirring at 1200R/min for 10 min;
(2) adding TEGO-655 and corresponding pigment into the mixture obtained in the step (1), grinding by using a ceramic three-roll grinder, measuring the fineness of the ground material by using a scraper fineness meter, and stopping grinding when the fineness is below 20 mu m to obtain the color paste for the low-odor UV nail polish gel.
Each of the properties of examples 1 to 7 was measured according to the following measurement methods.
(1) The state in the container is as follows: the color paste which is prepared by stirring with a stirring rod and has been kept stand for a period of time is evaluated as being in a uniform state without hard lumps after being stirred and mixed when being easily and uniformly mixed after being stirred.
(2) Viscosity: firstly, placing the color paste developed by the invention in a thermostatic chamber (25 ℃) for standing for at least 12 hours, then testing twice in parallel by using an NDJ-8S type rotational viscometer, wherein the difference of the two measured values is not more than 3% of the average value, and taking the average value as the test result.
(3) Fineness: the prepared color paste, which has been allowed to stand for a period of time, is measured with a squeegee fineness meter and a reading is recorded based on the test results.
(4) Odor: the odor of the color paste is tested and classified into 6 grades according to the odor, wherein the grade is 0-5 grade, the smaller the grade value is, the smaller the odor is, 0 represents no obvious odor, and 5 represents strong pungent odor.
(5) Compatibility: and (3) observing the prepared color paste which is kept still for a period of time by using a visual method, wherein the color paste has good compatibility if no poor phenomena such as flooding, floating, thickening and the like occur, and otherwise, the color paste has poor compatibility.
(6) Storage stability: the color paste developed by the invention is placed in a constant temperature box at 60 ℃ for accelerated aging test, the color paste is taken out after 10 days of test, the color paste is cooled to normal temperature, whether the performance of the color paste changes in all aspects is detected, if the color paste has no abnormal phenomena such as sedimentation, caking, flocculation, layering and the like, and the fineness and the viscosity change are not obvious, the color paste is qualified, otherwise, the color paste is unqualified.
The following are the results of testing the properties of examples 1-7 and comparative examples 1 and 2, and comparative examples 1 and 2 are two commercially available color pastes for UV nail polish glue.
It can be seen that the color paste developed by the invention has much smaller odor, moderate viscosity, slightly tiny fineness and good storage stability compared with two commercially available color pastes.
(III) testing the universality of color paste
The color pastes of various colors prepared in the above embodiments are added into the nail polish glue base material together with the white color paste prepared in the embodiment 6, and the corresponding nail polish glue finished product is prepared according to the following formulas. Each formula consists of the following components in parts by weight.
The formula I is as follows:
urethane acrylate (homemade: LT 2010) 34
Polyester acrylate (homemade: LT 3026) 18
HEMA 14
DCPDA 5
TPO 4
184 1
BYK-333 0.3
R974 1.6
Color pastes (example 1) 3
Color paste (example 6) 5.
And a second formula:
urethane acrylate (homemade: LT 2018) 30
Polyester acrylate (homemade: LT 3029) 16
HEMA 13
TMPTA 6
TPO-L 3
184 2
BYK-333 0.2
R974 1.2
Color pastes (example 2) 2
Color paste (example 6) 3.
And the formula III:
urethane acrylate (homemade: LT 2024) 36
Polyester acrylate (homemade: LT 3032) 14
HEMA 16
DCPDA 3
TPO 5
1173 2
BYK-333 0.5
R974 1.8
Color paste (example 3) 3
Color paste (example 6) 3.
The formula four:
urethane acrylate (homemade: LT 2016) 28
Urethane acrylate (homemade: LT 2018) 25
HEMA 17
DPGDA 4
TPO 4
BYK-333 0.4
R974 1
Color pastes (example 4) 2
Color paste (example 6) 4.
And a fifth formula:
urethane acrylate (homemade: LT 2017) 32
Urethane acrylate (homemade: LT 2020) 22
HEMA 18
DCPDA 3
TPO-L 4
184 2
BYK-333 0.6
R974 1.5
Color paste (example 5) 3
Color paste (example 6) 4.
And the formula six:
urethane acrylate (homemade: LT 2013) 26
Urethane acrylate (homemade: LT 2026) 22
DCPDA 12
TMPTA 4
TPO 3
184 1
BYK-333 0.3
R974 1
Color paste (example 7) 1
Color paste (example 6) 3.
And (3) carrying out various performance tests on the nail polish gel prepared by the formulas according to the following test methods.
(1) Viscosity: the prepared nail polish gel is placed in a constant temperature room (25 ℃) and stands for at least 12 hours, and is tested twice in parallel by using an NDJ-8S type rotational viscometer, the difference of the two measured values is not more than 3% of the average value, and the average value is taken as the test result.
(2) Surface drying: and flatly coating the prepared nail polish gel on a gel cover, controlling the coating thickness, placing the gel cover under a 36w LED lamp for irradiation for 90s for photocuring reaction, detecting the dryness degree of the surface of the nail polish gel by using a finger touch method, namely pressing the surface of the cured nail polish gel by using fingers after the irradiation is finished, and indicating that the nail polish gel is completely dry if the nail polish gel is not completely sticky. The tack-free is classified into a scale of 0 to 5, 0 indicating no tack-free, and 5 indicating complete tack-free.
(3) Adhesion force: ASTM D3359 hundred grid test method was used. And (3) coating the prepared nail polish gel on the nail according to the conventional nail manufacturing steps, and irradiating and curing under a UV/LED lamp. And (3) marking 10 multiplied by 10 grids with the specification of 1mm multiplied by 1mm on the surface of the solidified sample by using a hundred grid knife, wherein each marking line needs to penetrate into the bottom layer position, then covering and sticking the small grids by using No. 3M600 gummed paper or other gummed paper with the same effect, and forcibly pressing the gummed paper by using an eraser to improve the contact force and the area between the gummed paper and a test area. The test was performed 2 times in the same position by grasping one end of the tape with the hand and quickly pulling the tape off in the vertical direction. The result is divided into 6 grades, 0B-5B, the larger the grade value is, the better the adhesive force is, 0B represents that the adhesive force is poor, and 5B represents that the adhesive force is good.
(4) Gloss: and (3) coating the prepared nail polish gel on the nail according to the conventional nail manufacturing steps, and irradiating and curing under a UV/LED lamp. Then, the gloss of 60 degrees was measured by a portable specular gloss meter, and the sample was irradiated under a predetermined incident angle and a predetermined light beam to obtain a light beam in the specular reflection angle direction, and the gloss was measured. The larger the test result value, the higher the gloss. The glossiness of the glass is more than 100, and the glass can give a glistening and shining feeling.
(5) Storage stability: and (3) placing the prepared nail polish gel into a constant temperature oven at 60 ℃ for accelerated aging test, taking out after testing for 15 days, cooling to normal temperature, and observing whether the gel has abnormal phenomena such as viscosity reduction, layering, pigment sinking, substance precipitation, caking and the like. If the colloid does not have larger change, the colloid is qualified, otherwise, the colloid is unqualified.
The following are the performance test results of the nail polish gel prepared by each formula.
The color paste prepared by the formulas has relatively good performances, has no problem of floating color and floating color, shows that the color paste has good compatibility with a base material system of the nail polish, has no negative influence on the performances of the base material system of the nail polish after being added, and shows that the color paste has the characteristic of universality.
In conclusion, the color paste for the low-odor UV nail polish gel is prepared by selecting ricinoleic acid modified polyurethane acrylate, wherein ricinoleic acid and hydroxyl in the structure can enhance the wettability of the polyurethane acrylate to pigments. The ricinoleic acid modified polyurethane acrylate still has urethane bonds and has good compatibility with resin commonly used in a formaldehyde gum base material, so that the prepared color paste has universality. In addition, the resin has good film forming property and does not have any negative influence on the performance of the nail polish gel base material system. By selecting the acrylate hydroxyl ester monomer, the reactive diluent has low viscosity, low odor, low irritation and good pigment wettability. By selecting the anti-settling agent fumed silica, the problem of pigment precipitation in a color paste system can be effectively solved, and the system can keep sufficient stability. By selecting the wetting dispersant of the modified polyether containing high pigment affinity groups, stronger binding force can be generated on the surface of pigment particles, and complete wetting and stability of inorganic and organic pigments are ensured. By selecting the pigment for cosmetics, the prepared color paste is ensured not to cause harm to human health, and can meet the requirements of related cosmetic law and regulation rules. Finally, through continuous adjustment and improvement of the using amount of each component, the prepared color paste has good performances of high safety, low smell, moderate viscosity, good compatibility, strong universality, good storage stability, good color development, bright color and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The color paste for the low-odor UV nail polish glue is characterized by comprising the following components in parts by weight:
resin 5-20
Active diluent 25-35
0.5-2 parts of anti-settling agent
Wetting dispersant 2-6
1-60 parts of pigment.
2. The color paste for the low-odor UV nail polish gel according to claim 1, wherein: the resin is ricinoleic acid modified polyurethane acrylate.
3. The color paste for the low-odor UV nail polish gel according to claim 1, wherein: the main structure of the resin is as follows:
wherein R:
。
4. the color paste for the low-odor UV nail polish gel according to claim 1, wherein: the reactive diluent is acrylate monomers.
5. The color paste for the low-odor UV nail polish gel according to claim 1, wherein: the anti-settling agent is fumed silica.
6. The color paste for the low-odor UV nail polish gel according to claim 1, wherein: the wetting dispersant is modified polyether containing high pigment affinity group.
7. The color paste for the low-odor UV nail polish gel according to claim 1, wherein: the pigment is a pigment for cosmetics.
8. A method for preparing a color paste for a low-odor UV nail polish gel according to claims 1 to 7, comprising the following steps:
the method comprises the following steps: accurately weighing the resin, the reactive diluent and the anti-settling agent, adding the resin, the reactive diluent and the anti-settling agent into a dry container, and stirring and dispersing by using a high-speed dispersion machine;
step two: and (3) adding a wetting dispersant and a pigment into the mixture obtained in the step one, grinding by using a ceramic three-roll grinder, measuring the fineness of the ground material body by using a scraper fineness meter, and stopping grinding when the fineness is below 20 mu m to obtain the color paste for the low-odor UV nail polish gel.
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