Nail lacquer

Abstract

The present invention relates to the field of human or animal nail care, and in particular to nail lacquers that have safety characteristics and / or contain a specific distribution of diamond particles. The lacquers of the present invention are preferably composed of substances generally recognized as safe (also known in the art as "Generally Recognized as Safe" (GRAS)). Lacquer refers to any liquid that is applied to the nail and hardens to form a hard film or layer. The present invention provides a liquid lacquer composition for forming a solid cosmetic coating on nail tissue, the composition comprising one or more film-forming polymers or polymer precursors, one or more solvents for the polymers or polymer precursors, one or more plasticizers that promote flexibility of the solid cosmetic coating, and optionally one or more pigments or optical modifiers. The liquid lacquer composition preferably further comprises diamond particles having an average size in the range of 0.1 microns to 10 microns dispersed in the liquid. The diamonds may be present in an amount of 0.01 to 0.20% by weight.

Description

[Technical Field]

[0001] The present invention relates to the field of human nail care, and in particular to nail lacquers that have safety properties and / or contain a specific distribution of diamond particles. The lacquers of the present invention are preferably composed of substances generally recognized as safe (also known in the art as GRAS, or "Generally Recognized as Safe"). Nail lacquer refers to any liquid that is applied to human or animal nails and hardens to form a hard film or layer. This includes nail polishes that rely on air drying or solvent evaporation, or nail polishes with two or more components that react to form a solid lacquer. Nail lacquers can be applied in separate layers, typically a base coat, a colored nail polish layer, and a gloss top coat. The base coat is applied directly to the nail tissue and is therefore formulated to provide good direct adhesion. The nail polish layer is usually intended to provide a color or light effect, such as a pearlescent or visible reflective effect. The top gloss coat serves to protect the nail polish and provide a glossy finish. In practice, each layer has a similar formulation. With some consumer nail polishes, a single application of nail polish can provide a well-pigmented film with high gloss and hardness. [Background technology]

[0002] Nail polish is a product used on nail tissue primarily for aesthetic reasons. Nail polish has been known for thousands of years and was originally based on a mixture of beeswax, egg white, gelatin, vegetable dyes, and gum arabic, all of which are naturally derived. Most modern, state-of-the-art formulations are made from three main types of ingredients, primarily of synthetic origin:

[0003] 1. Polymers These constitute the base components of nail polish. They are usually supplied as a solution of nitrocellulose and a modifier such as tosylamide / formaldehyde resin (TSF resin). Together, they produce a lacquer with a hard, glossy (i.e., shiny), flexible surface that has strong adhesion to the keratinous tissue beneath the nail. The nitrocellulose-TSF combination has proven effective in commercial formulations, but has faced consumer resistance because the resin contains trace amounts of formaldehyde, a known carcinogen. Furthermore, cases of allergic and skin irritation have been reported among users of nail polish containing this ingredient.

[0004] Nitrocellulose polymer is a solution of the solid reaction product of cotton or wood chips treated with nitric and sulfuric acids in a suitable solvent. Solvents that can be used with nitrocellulose include almost any organic solvent, such as acetone and / or ethanol. Tosylamide / formaldehyde is a synthetic film-forming resin that is added to improve the plasticity and adhesion of nitrocellulose when applied.

[0005] 2. Plasticizers These are added to solid lacquers to increase their flexibility and durability. Among these, camphor has been widely used to increase the flexibility of the formulation, but it has been banned in the European Union, along with dibutyl phthalate and other ingredients with similar functionality. While alternatives to these ingredients are available, they are generally associated with a loss of functionality and aesthetic appearance.

[0006] 3. Pigments These may be added to lacquer formulations to provide color and other visual effects, such as pearlescent effects.

[0007] Over time, some users of standard nail polish formulations have experienced allergic reactions and a total breakdown of the surface keratin layer of the nail, resulting in a pitted, non-smooth surface and uneven color development. Therefore, a complete reconsideration and revision of the ingredient palette is needed, with an emphasis on robust natural alternatives and functionality, especially preserving the properties of hardened solid lacquers.

[0008] Patent Document 1 (published November 13, 2007) discloses the use of nanodiamonds in cosmetics such as nail polish compositions, lip glosses, and eyeliners. The nanodiamond particles have an average size of 0.5 nm to 50 nm (preferably 0.5 nm to 10 nm). The nail polish uses nitrocellulose resin, ethyl acetate, toluene, and isopropyl alcohol as solvents, and dibutyl phthalate as a plasticizer. It is claimed that nanodiamonds provide improved strength (as well as resistance to chipping and abrasion), but no concrete evidence of this is provided. The compositions in this patent application typically contain nanodiamond particles in amounts of 1 to 60% by weight of the composition. When incorporated into lacquers, nanodiamonds appear to be able to strengthen the coating's structure and increase its resistance to scratching, chipping, and overall abrasion.

[0009] It is believed that the small size of nanodiamonds allows them to penetrate deeply into the lacquer matrix, creating a strong and durable composite. This reinforcement improves the overall hardness of the nail lacquer, providing better protection and longevity for the nail.

[0010] Additionally, nanodiamonds can also improve the gloss and smoothness of nail lacquers, giving them a more polished, professional look.To achieve the desired results without compromising product safety or performance, it is essential to ensure that the nanodiamonds used are of high quality, properly dispersed within the lacquer matrix, and compatible with the other ingredients.

[0011] Overall, the incorporation of nanodiamonds into the formulation can result in a high performance nail lacquer that is both durable and aesthetically pleasing.

[0012] Nail polish containing nanodiamonds is a relatively new innovation in the world of cosmetics.

[0013] Nanodiamonds, by definition, are small particles of diamond less than 100 nanometers in size. Therefore, they are not individually resolvable by an observer using the unaided eye in visible light. Diamonds can be added to nail polish to create a glitter effect, but generally, the particle size must be larger than about 74 microns to have an optically visible effect. One of the main benefits of using nail polish containing nanodiamonds is that they can help strengthen the lacquer and protect the nails. Nanodiamond particles can also help seal in moisture, keeping nails hydrated and healthy.

[0014] However, nail polish containing nanodiamonds can be more expensive than conventional nail polish due to the additional cost of diamond particles in the desired size range and distribution. Consumer resistance to the presence of nanoparticles in cosmetics has also been observed, and they are therefore listed as undesirable ingredients in the 21-FREE list (see Table 2 above). Whether or not a listed component is harmful, consumers are guided by the perceived risk, which ultimately determines whether a product will be successful in the market. Therefore, there is a need to provide alternative methods for strengthening nail polish to improve its longevity, scratch resistance, and adhesion to the underlying nail.

[0015] In various aspects, the present invention seeks to provide lacquer compositions (which may be base coats, nail polishes and / or top coats) that are safer and use fewer undesirable ingredients without compromising performance. It is also an object to provide lacquer compositions that are harder, more scratch-resistant and retain good adhesion.

[0016] The above objects are met, at least in part, by the lacquer compositions according to the invention as claimed below and / or in the ensuing claims. [Prior art documents] [Patent documents]

[0017] [Patent Document 1] US Patent No. 7294340 Specification B2 Summary of the Invention

[0018] The present invention relates to base coat, nail polish, and top coat formulations. The family of formulations is based on ingredients that are well-documented, generally regarded as safe (GRAS), and proven to retain functionality that ensures best-in-class performance in terms of longevity, chip resistance, and gloss. Functionality is enhanced by the addition of microdiamond powder, which leads to formulations with longer longevity, adhesion, and chip resistance, and also compensates for the loss of functionality experienced by other nail care products formulated with natural and non-toxic alternatives to widely used synthetic, primarily petrochemical, ingredients. The new ingredient formulations help repair the underlying nail tissue when damaged and help eliminate minor discoloration and imperfections on the nail surface.

[0019] In one aspect, the present invention provides a liquid lacquer composition for forming a solid cosmetic coating on nail structure, the composition comprising: one or more film-forming polymers or polymer precursors, one or more solvents for the polymer or polymer precursor; Optionally, one or more plasticizers that promote flexibility of the solid cosmetic coating, and optionally one or more pigments or optical modifiers.

[0020] In a preferred embodiment of the present invention, the composition further comprises micron-scale diamond particles, preferably having an average size in the range of 0.1 microns to 10 microns, dispersed in the liquid composition. The diamond particles more preferably have an average size in the range of 0.2 to 5.0 microns, and most preferably in the range of 0.3 to 3.0 microns.

[0021] The average particle size has a standard deviation, and the particle size + / - the standard deviation is preferably within the range. Most preferably, the lower limit D1 and the upper limit D2 of the particle size are within the range. 99 is within this range. This ensures that nanodiamonds and oversized particles are essentially excluded. In one aspect, the present invention can provide a nail composition according to the present invention that is free of diamond nanoparticles.

[0022] The diamond particles may be provided with a dispersant such as fumed silica and / or stearalkonium bentonite. The particles may be added pre-mixed with the dispersant, film-forming polymer and solvent.

[0023] The diamond particles may be present in an amount of about 0.01 to 0.20 wt%, preferably about 0.02 to 0.08 wt%, and most preferably in the range of 0.03 to 0.07 wt%. Amounts outside these ranges can be used if a particular application requires it.

[0024] Compared to nanodiamond-based liquid formulations, one skilled in the art would expect that micron-sized diamonds would be more difficult to disperse uniformly throughout the lacquer matrix due to their larger size and tendency to agglomerate or settle. The larger size of the micron-scale particles makes them less able to penetrate the nail surface and therefore less able to provide improved physical properties to the nail or lacquer.

[0025] The inventors have unexpectedly discovered that particles in the size range claimed according to the present invention do indeed provide better strength and durability in nail lacquers. Furthermore, users have provided anecdotal reports of improved nail tissue condition after switching to the diamond-containing lacquer of the present invention.

[0026] According to a further aspect of the invention, the lacquer composition is selected to comply with the US Environmental Protection Agency's (EPA) GRAS A1 or A2 or B standards.

[0027] This may require the exclusion of certain undesirable, relatively unsafe compounds or chemicals, so the polymer / precursor may exclude tosylamide / formaldehyde resins (TSF resins).

[0028] Plasticizers may exclude dibutyl phthalate (DBP), trimethylpentanyl diisobutyrate, triphenyl phosphate, camphor. Pigments, if present, exclude mica, titanium dioxide, bismuth oxychloride, Cl 777266.

[0029] Solvents may exclude propyl acetate, toluene, benzophenone-1, dimethicone.

[0030] The film-forming polymer may include nitrocellulose. This compound is potentially harmful, but is not harmful when included in small amounts in nail lacquers. The solvent may be selected from one or more of ethyl acetate, butyl acetate, ethyl alcohol, isopropyl alcohol, stearalkonium bentonite, acetone, and methyl ethyl ketone (MEK). These may be provided in small amounts that reduce the risk to negligible amounts. The polymer or polymer precursor may be selected from one or more of adipic acid / neopentyl glycol / trimellitic anhydride copolymer, acrylate copolymer, and cellulose acetate butyrate.

[0031] The plasticizer may be selected from one or more of acetyltributyl citrate, triethyl citrate, and sucrose benzoate.

[0032] The pigment may be selected from one or more of silica, citric acid, ferric ammonium ferrocyanide, D&C Red No. 6 barium lake, D&C Red No. 7 calcium lake, FD&C Yellow No. 5 aluminum lake, Cl 77891, Cl 15880, aluminum hydroxide, tin oxide, Cl 77499, Cl 77007, Cl 77742, Cl 12085, Cl 42090, Cl 77000, Cl 60725.

[0033] The present invention also provides a base coat or nail varnish or gloss coat for application to human nails, comprising a liquid lacquer according to any of the lacquer compositions previously described herein. DETAILED DESCRIPTION OF THE INVENTION

[0034] It is assumed that all necessary preparations, such as cleaning and disinfecting the application area, have been made prior to the application of nail polish in the context of this invention. The subsequent application procedure consists of two to three application steps, all using solvent-dissolved polymers, i.e., nail polish systems that cure / solidify by solvent evaporation. Systems that require exposure to UV light for curing are not considered. The application sequence may consist of one, two, or all of the following steps: 1) Base coat 2) Colored nail polish, sometimes repeated to ensure complete coverage. 3) A top coat to make the application last longer, which may be omitted.

[0035] "Alustre" is one trade name adopted for new formulations, some of which are provided with infused microdiamonds, and this name will be used hereafter in the text to designate a series of products, namely base coats, nail polishes, and top coats, that are compositions according to one or more aspects of the present invention.

[0036] The ingredient list for the products used in each application step is generally the same, but concentrations are adjusted to optimize functionality. A general list of ingredients is shown in Table 1 below.

[0037] Table 1: Common ingredients list for nail polish [Table 1]

[0038] The primary film-forming component used in nail polish remains nitrocellulose, and the solvent is derived from the fermentation process. Once the solvent evaporates (drying time is an important performance characteristic), the resulting coating becomes brittle and may not adhere well to the nail. To ensure good adhesion and flexibility, other polymers or plasticizers are added to the formulation. In addition to mechanical functionality, nail polish must also withstand the cosmetic oils, soaps, water exposure, and sun exposure commonly encountered on nails in daily life.

[0039] Modern nail polish formulations, unfortunately, were inspired by various ingredients also used in industrial paints. However, to avoid the use of toxic ingredients that may cause adverse allergic reactions or other health effects, the formulations presented herein replace these ingredients with healthier alternatives derived from well-documented natural substances classified as "Generally Recognized as Safe" (GRAS), as classified as A1 in Table 2 below, or "Considered to be relatively safe chemicals for use in industrial, commercial, and consumer applications," with classification designation A2 in Table 3 below. The GRAS classification system was developed and maintained by the U.S. Environmental Protection Agency (EPA).

[0040] The description is based on a combination of scientific research and regulatory evaluation of the safety of a particular chemical. This process typically involves multiple stages of testing, including animal testing, human testing, and environmental assessment. The European Chemicals Agency (ECHA) can similarly classify chemicals as safe for a particular use, with appropriate restrictions and guidelines for handling and disposal. Under the Cosmetics Regulation, all cosmetic ingredients must undergo a safety assessment before being marketed. The safety assessment takes into account the intended use of the cosmetic, potential exposure to the ingredient, and available toxicological data on the ingredient. The cosmetics industry itself has developed a list of 21 ingredients that it considers to be a guideline for undesirable ingredients in cosmetics.

[0041] Table 2: The 21-Free list, originally created by Kim D'Amato, founder of the nail polish brand Priti NYC. [Table 2]

[0042] For example, formaldehyde and toluene were previously commonly used ingredients in nail polish formulations. These chemicals are still found in some nail products, and there is a need to phase them out and move to greener, more natural formulations that use alternative, healthier ingredients. Formaldehyde and toluene are known to cause allergic reactions, including swollen eyelids, in some people and are classified as carcinogens.

[0043] Because nitrocellulose is considered a hazardous waste product and can emit harmful gases when burned, research has shown that the use of nitrocellulose solutions in nail polish may have some adverse environmental impact. Therefore, this ingredient has a classification designation of B in Table 3. The amount of nitrocellulose used in nail polish is typically relatively small, as evidenced by Table 3, and it hardens in just a few seconds if the appropriate solvent is used. The nitrocellulose film from nail polish that hardens on the nail is generally considered safe for most people.

[0044] Table 3: List of ingredients and concentration levels in nail products according to the present invention [Table 3-1] [Table 3-2]

[0045] Legend: np=none A1: "Generally Recognized as Safe" (GRAS) substances A2: Substances that are "considered to be relatively safe chemicals for use in industrial, commercial, and consumer applications." B: The substance is generally considered safe, especially in nail polish, because relatively small amounts are used and the cured film dissipates fumes and solvents after application.

[0046] Specific examples and performance tests First, functional testing was performed using the following performance (functional) parameters: 1. Gloss evaluation 2. Drying time 3. Hardness after 24 hours 4. Adhesion test

[0047] Testing was conducted to provide a comparison of Alustre products against seven commercial brands, evaluating four main performance parameters.

[0048] Table 4: Performance parameters of Alustre nail polish against market leading brands [Table 4]

[0049] Table 5: Functional parameters of Alustre topcoats for seven market-leading brands. [Table 5]

[0050] The above results show that the diamond-free, GRAS-compliant Alustre product compares well with currently available commercial formulations in all measured parameters, despite the absence of some of the objectionable ingredients prevalent in the field, indicating that the safer lacquers proposed in this invention can be successfully introduced to the market without having to compromise on performance.

[0051] Testing of Alustre products with and without micron-scale diamonds

[0052] Test work on the Alustre product has unexpectedly shown that adding micron-scale diamonds to lacquer formulations can provide a strengthening effect (evident in hardness measurements) without the need to use expensive and consumer-avoided nanodiamonds (i.e., diamond particles with dimensions less than 100 nm).

[0053] Thus, as can be seen in Table 6 below, the inventors have found that adding microdiamonds to the lacquer improves mechanical strength (as measured by hardness), as evidenced by a comparison of the hardness after 24 hours of Alustre 607 (containing microdiamonds) and Alustre 609 (containing no diamonds). The hardness is also higher than that of a comparable commercial brand called Chromavis. All three formulations passed adhesion tests and showed no loss of the applied film.

[0054] Table 6: Comparative gloss, hardness and adhesion test results of Alustre formulations with and without implanted diamonds. [Table 6]

[0055] The diamond particles used in the 607 Alustre formulation were obtained from a commercial supplier of natural diamonds (IDC Holdings, Hatton Garden, London, UK). The particle size distribution characteristics of these particles (obtained from a commercially available Beckman Coulter particle analyzer) are shown in the table below.

[0056] Table 7-607 Size and distribution characteristics of Alustre micron-scale diamond particles [Table 7]

[0057] The diamonds in this batch have a mean diameter of about 2 microns (1.916 μm) with a standard deviation of about 0.5 microns (0.496). The distribution has a significant upper limit (D 99 ) and a lower effective limit (D1) of 1.113 μm. We define the number of particles with diameters above and below the D99 and D1 threshold sizes, respectively, to be insignificant, i.e., essentially nonexistent.

[0058] When a range of particle sizes suitable for use in a lacquer according to the invention is cited, it is meant that the particles have an average diameter within the cited range. In a preferred embodiment of the invention, the particles should have a diameter distribution such that the average particle size + / - standard deviation is within the cited range.

[0059] Most preferably, the particles have a D1 diameter greater than the lower limit of the cited range and a D 99 The diameter is smaller than the upper end of the quoted range, ensuring that only a small number of particles are outside the targeted average particle range to provide optimal and reasonable strength / hardness properties without falling into the undesirable nanodiamond range.

[0060] According to the present invention, the particle size (typically diameter) range is preferably greater than 0.10 microns to 10.0 microns, more preferably 0.2 microns to 5.0 microns. Above 5.0 microns, there is a risk that the diamond particles will separate over time when left unattended. Therefore, the most preferred range is 0.3 microns to 3.0 microns. A size less than 0.1 micron represents (by definition) undesirable nanoparticles. Nanoparticles may, of course, be present unavoidably in practice, but may be present in small enough amounts that they can be safely ignored.

[0061] If the particles are larger than 10 microns, the smooth surface film of the solid lacquer begins to feel rough to the touch, and the aesthetic appearance (gloss) is not very satisfactory. Therefore, 10 microns can be set as the upper limit for the diamond particle size / diameter. For optimal gloss, the inventors have evaluated the benefits of providing diamond particles with a size of less than 10 microns, preferably less than 5.0 microns, and most preferably less than 3.0 microns.

[0062] Two suspending agents (or dispersing agents) are used to suspend the diamonds in the liquid formulation: stearalkonium bentonite and silica. To successfully incorporate the diamond powder, a premix of nitrocellulose, solvent, plasticizer, and diamond is created, ensuring a highly efficient process for dispersing the diamonds throughout the liquid formulation and preserving the gloss of the finished surface. Both suspending agents are GRAS-classified for the purposes of this invention. The amount of diamond added was sufficient to result in 0.05% by weight of the final liquid lacquer formulation.

[0063] Silica is used as a thickener to prevent premature settling of pigments, but it also reduces the gloss of nail polish in other formulations. Silica is often used in nail polish formulations as a thickener and a way to improve the texture of the polish. In this application, silica is in the form of "fumed silica." Fumed silica is a type of synthetic amorphous silica commonly used in cosmetics as a thickener, emulsifier, and stabilizer. It is a fine powder made by vaporizing silica compounds and then cooling them to condense them into a solid form.

[0064] Stearalkonium bentonite is a thickening agent that helps control the flow of liquids during application and prevents rapid settling of pigments. Stearalkonium bentonite is often used in combination with other ingredients, such as silica, to create the desired texture and consistency of the nail polish.

[0065] The results show that the use of micro-scale diamonds (having an average diameter of 1.9 microns) improves both the gloss and hardness of the nail polish film without losing film adhesion. Overall, the results show that the GRAS / EPA-compliant lacquer of the present invention has properties (gloss quality, drying time, and 24-hour hardness and adhesion) equivalent to currently commercially available "unsafe" lacquers. In fact, the diamond-containing version has a measurably improved hardness, which is believed to result from the increased film strength due to the dispersed microdiamonds.

[0066] In summary, the present invention relates to the field of human or animal nail care, and in particular to nail lacquers that have safety characteristics and / or contain a specific distribution of diamond particles. The lacquers of the present invention are preferably composed of substances generally recognized as safe (also known in the art as GRAS, "Generally Recognized as Safe"). Lacquer refers to any liquid that is applied to the nail and hardens to form a hard film or layer. The present invention provides a liquid lacquer composition for forming a solid cosmetic coating on nail tissue, the composition comprising one or more film-forming polymers or polymer precursors, one or more solvents for the polymers or polymer precursors, one or more plasticizers that promote the flexibility of the solid cosmetic coating, and optionally one or more pigments or optical modifiers. The liquid lacquer composition preferably further comprises diamond particles having an average size in the range of 0.1 microns to 10 microns dispersed in the liquid. These may be provided in an amount of 0.01 to 0.20% by weight.

Claims

1. A liquid lacquer composition for forming a solid cosmetic coating on nail tissue, One or more film-forming polymers or polymer precursors, One or more solvents of the polymer or polymer precursor, One or more plasticizers that optionally promote the flexibility of the solid cosmetic coating, and one or more pigments or optical modifiers, The liquid contains diamond particles having an average size in the range of 0.1 microns to 10 microns, The solvent is selected from one or more of ethyl acetate, butyl acetate, ethyl alcohol, isopropyl alcohol, stearalkonium bentonite, acetone, and methyl ethyl ketone (MEK). A liquid lacquer composition in which the polymer or polymer precursor is selected from one or more of nitrocellulose, adipic acid / neopentyl glycol / trimellitic anhydride copolymer, acrylate copolymer, and cellulose acetate butyrate.

2. The liquid lacquer composition according to claim 1, wherein the diamond particles have an average size in the range of 0.3 to 3.0 microns.

3. The liquid lacquer composition according to claim 2, wherein the average particle size plus / minus its standard deviation is within the range described above.

4. The liquid lacquer composition according to claim 3, wherein the lower limit D1 and upper limit D99 of the particle size are within the range.

5. The liquid lacquer composition according to claim 1, wherein a dispersant such as fumed silica and / or stearalkonium bentonite is provided for the diamond particles.

6. The liquid lacquer composition according to claim 2, wherein the diamond particles are present in an amount of 0.01 to 0.20% by weight, preferably about 0.02 to 0.08% by weight, and most preferably about 0.05% by weight.

7. The liquid lacquer composition according to claim 1, wherein the composition conforms to the GRAS A1, A2, or B standards of the U.S. Environmental Protection Agency (EPA).

8. The liquid lacquer composition according to claim 1, wherein the polymer / precursor excludes tosylamide / formaldehyde resin (TSF resin).

9. The liquid lacquer composition according to claim 1, wherein the plasticizer excludes dibutyl phthalate (DBP), trimethylpentanyl diisobutyrate, triphenyl phosphate, and camphor.

10. The liquid lacquer composition according to claim 1, wherein one or more pigments are present, but the pigments are excluding mica, titanium dioxide, bismuth oxychloride, and Cl 777266.

11. The liquid lacquer composition according to claim 1, wherein the solvent excludes propyl acetate, toluene, benzophenone-1, and dimethicone.

12. The liquid lacquer composition according to claim 1, wherein the film-forming polymer comprises nitrocellulose.

13. A liquid lacquer composition wherein the plasticizer is selected from one or more of acetyl tributyl citrate, triethyl citrate, and sucrose benzoate.

14. The liquid lacquer composition according to claim 1, wherein the pigment is selected from one or more of the following: silica, citric acid, ferric ammonium ferrocyanide, D&C Red No. 6 barium lake, D&C Red No. 7 calcium lake, FD&C Yellow No. 5 aluminum lake, Cl 77891, Cl 15880, aluminum hydroxide, tin oxide, Cl 77499, Cl 77007, Cl 77742, Cl 12085, Cl 42090, Cl 77000, and Cl 60725.

15. A base coat for application to human nails, comprising the liquid lacquer composition described in claim 1, The aforementioned base coat is The diamond particles are present in an amount of 0.01 to 0.20% by weight. One or more film-forming polymers or polymer precursors comprising nitrocellulose <11% by weight, adipic acid / neopentyl glycol / trimellitic anhydride copolymer <5.3% by weight, and acrylate copolymer <4% by weight, A plasticizer containing acetyl tributyl citrate < 5% by weight and triethyl citrate < 5% by weight, A pigment containing silica <0.4 wt%, citric acid <0.0001 wt%, D&C Red No. 6 barium lake <0.005 wt%, CI 77891 <0.08 wt%, and aluminum hydroxide <0.1 wt%, and It contains one or more solvents comprising ethyl acetate <38% by weight, butyl acetate <28% by weight, ethyl alcohol <6% by weight, isopropyl alcohol <0.2% by weight, and stearalkonium bentonite <1.5% by weight. The total content of the base coat is 100%.

16. A nail polish liquid for application to human nails, comprising the liquid lacquer composition described in Claim 1, The aforementioned nail polish liquid is One or more film-forming polymers or polymer precursors comprising nitrocellulose <12% by weight, adipic acid / neopentyl glycol / trimellitic anhydride copolymer <5.3% by weight, and acrylate copolymer <4% by weight, A plasticizer containing acetyl tributyl citrate <5% by weight, triethyl citrate <5% by weight, and sucrose benzoate <0.2% by weight, Silica <0.65 wt%, Citric acid <0.0001 wt%, Iron ferrocyanide <1 wt%, D&C Red No. 6 Barium Lake <1.3 wt%, D&C Red No. 7 Calcium Lake <0.6 wt%, FD&C Yellow No. A pigment containing 5 aluminum lake < 1.4 wt%, CI 77891 < 2.7 wt%, CI 15880 < 0.8 wt%, aluminum hydroxide < 0.1 wt%, tin oxide < 0.2 wt%, CI 77499 < 3.0 wt%, CI 77007 < 3.0 wt%, CI 77742 < 1.0 wt%, CI 12085 < 0.8 wt%, CI 42090 < 0.5 wt%, CI 77000 < 0.06 wt%, CI 60725 < 0.0002 wt%, The solvent comprises ethyl acetate <42% by weight, butyl acetate <31% by weight, ethyl alcohol <6% by weight, isopropyl alcohol <0.15% by weight, stearalkonium bentonite <1.7% by weight, acetone <0.2% by weight, and methyl ethyl ketone <0.01% by weight. The total amount of each component is 100%.

17. A top coat for application to human nails, comprising the liquid lacquer composition described in Claim 1, The aforementioned top coat is One or more film-forming polymers or polymer precursors comprising nitrocellulose <8.5% by weight, acrylate copolymer <4% by weight, and cellulose acetate butyrate <3% by weight, A plasticizer containing acetyl tributyl citrate < 5% by weight and triethyl citrate < 5% by weight, It contains one or more solvents comprising ethyl acetate <36% by weight, butyl acetate <35% by weight, ethyl alcohol <5% by weight, and methyl ethyl ketone <0.01% by weight. The total content of the top coat is 100%.

18. The nail polish liquid according to claim 16, wherein the composition after a drying time of 2 minutes 20 seconds to 3 minutes 30 seconds has a temperature of at least 176°C after 24 hours have elapsed.

19. The top coat according to claim 17, wherein the composition after a drying time of 1 minute 54 seconds to 2 minutes 24 seconds has a hardness of at least 125 after 24 hours.

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