REMOVABLE COATING SYSTEMS AND METHODS

Abstract

Disclosed herein are coating compositions that may include at least one urethane (meth)acrylate oligomer having a molecular weight between about 2,000 g/mol and about 50,000 g/mol and at least one cycloaliphatic (meth)acrylate. The coating compositions may also optionally include at least one photo-initiator, adhesion promoter, pigment, dye and/or plasticizer. The coating compositions may be hardened, after application, by curing by exposure to radiant energy, by exposure to electron beam radiation, by exposure to heat, by exposure to chemicals and combinations thereof. Upon hardening, the coating composition typically has two phases, a soft phase which has a Tg between −50° C. and 0° C. and a hard phase which has a Tg between 60° C. and 120° C. Methods of using the coating compositions are also described.

Claims

1. A coating composition comprising: a) at least one urethane (meth)acrylate oligomer of formula (I) ##STR00004## wherein 2≦n≦20 and 2≦m≦4; R1 being a diisocyanate radical selected from the group consisting of alkylene, cycloalkylene, arylene, arylkylene and combinations thereof; R2 being a diol radical selected from the group consisting of alkylenes, cycloalkylenes and arylalkylenes; R3 comprises a moiety of —R4-OH, so that it has a mean OH value of about 0.01 mg KOH/g to about 100 mg KOH/g and R3 comprises a moiety of —R5-(meth)acryloyl; R4 and R5 being a bivalent radical selected from the group consisting of alkylenes, cycloalkylenes and arylalkylenes, with R4 and R5 being identical or different from each other; and wherein the at least one urethane (meth)acrylate oligomer has a number average molecular weight Mn measured by GPC, of from about 2,000 g/mol to about 50,000 g/mol; b) at least one cycloaliphatic (meth)acrylate; and c) optionally, at least one allylic compound from allylic monomers and/or oligomers bearing at least one allylic group, d) optionally, at least one component selected from the group of additives consisting of an adhesion promoter, a photo-initiator, a thiol compound, a pigment, a dye, a plasticizer and combinations thereof.

2. The coating composition of claim 1, wherein the said composition is curable.

3. The coating composition of claim 1, wherein the coating composition comprises less than 1% by weight of non-reactive solvent and less than 1% by weight of non-reactive, solvent-dissolvable polymer.

4. The coating composition of claim 1, wherein the coating composition comprises an adhesion promoter that includes one or more functional groups selected from the group consisting of hydroxyl groups, carboxylic acids, phosphoric acids and combinations thereof.

5. The coating composition of claim 4, wherein the adhesion promoter is selected from the group consisting of hydroxylethyl (meth)acrylate, hydroxylpropyl (meth)acrylates, pyromellitic dianhydride dialkyl(meth)acrylate, phathalic acid monoalkyl (meth)acrylates, succinic acid monoalkyl (meth)acrylates, phosphoric acid or phosphoric ester functional (meth)acrylates and carboxylic acid functional (meth)acrylates and combinations thereof.

6. The coating composition of claim 1, wherein said composition further comprises an allylic compound c) bearing at least one allylic group and optionally a metal ion catalyst.

7. The coating composition of claim 2, wherein the coating composition comprises a photo-initiator selected from the group consisting of α-hydroxyketones, phenylglyoxylates, benzyldimethylketals, α-aminoketones, mono-acyl phosphines, bis-acyl phosphines, phosphine oxides and metallocenes and combinations thereof.

8. The coating composition of claim 1, wherein the cycloaliphatic (meth)acrylate b) comprises a (meth)acrylate monomer bearing at least one mono-, bi- or tri-cyclic group.

9. The coating composition of claim 1, wherein the cycloaliphatic (meth)acrylate b) is selected from the group consisting of 3,3,5-Trimethycyclohexyl acrylate, tricyclodecane dimethanol (meth)acrylate, (alkoxylated) isobornyl (meth)acrylate, (alkoxylated) isophoryl (meth)acrylate, (alkoxylated) trimethylolpropane cyclic formal (meth)acrylate, (alkoxylated) tertiobutylcyclohexyl (meth)acrylate, (alkoxylated) tetrahydrofurfuryl (meth)acrylate, (alkoxylated) dicyclopentadiene (alkoxylated) (meth)acrylate, (alkoxylated) tricyclodecane dimethanol (meth)acrylate, (alkoxylated) cyclohexane dimethanol (meth)acrylate, (alkoxylated) (di)cyclopentenyl (meth)acrylate, (alkoxylated) cyclohexyl (meth)acrylate, (alkoxylated) norbornyl (meth)acrylate, (alkoxylated) (meth)acrylate based on rosin (hydroxyalkyl (meth)acrylate ester with abietic acid) and combinations thereof.

10. The coating composition of claim 1, wherein the cycloaliphatic (meth)acrylate b) is present from 20% to about 80% by weight.

11. The coating composition of claim 1, wherein the cured coating has two phases, a soft phase which has a Tg between −50□ C and 0 □ C and a hard phase which has a Tg between 60 □ C and 120 □ C.

12. The coating composition of claim 1, wherein the at least one urethane (meth)acrylate oligomer a) has a molecular weight Mn of from about 3,000 g/mol to about 25,000 g/mol.

13. The coating composition of claim 1, wherein 3≦n≦10.

14. The coating composition of claim 1, wherein the free OH value for oligomer a) is from about 2 mg KOH/g to about 50 mg KOH/g.

15. The coating composition of claim 1, wherein the at least one urethane (meth)acrylate oligomer a) is derived from polyethers, polyesters, hydrogenated polybutadiene, polycarbonates and/or polycaprolactones.

16. The coating composition of claim 1, wherein the at least one urethane (meth)acrylate oligomer a) has an average in number-functionality of from about 1.1 to about 1.9 (meth)acrylates.

17. A coating composition comprising: a) at least one urethane (meth)acrylate oligomer of formula (I) ##STR00005## wherein 2≦n≦20 and 2≦m≦4; R1 being a diisocyanate radical selected from the group consisting of alkylene, cycloalkylene, amylene, aralkylene and combinations thereof; R2 being a diol radical selected from the group consisting of alkylenes, cycloalkylenes, arylalkylenes and combinations thereof; R3 comprises a moiety of —R4-OH that has a free OH value of about 0.01 mg KOH/g to about 100 mg KOH/g and R3 comprises a moiety of —R5-(meth)acryloyl; R4 and R5 being a bivalent radical selected from the group consisting of alkylenes, cycloalkylenes and arylalkylenes, with R4 and R5 being identical or different from each other; and wherein the at least one urethane (meth)acrylate oligomer has a molecular weight of from about 2,000 g/mol to about 50,000 g/mol; b) at least one cycloaliphatic (meth)acrylate; and c) optionally, at least one allylic compound from allylic monomers and/or oligomers bearing at least one allylic group, d) optionally, at least one component selected from the group consisting of an adhesion promoter, a photo-initiator, a pigment, a dye, a plasticizer and combinations thereof; and wherein the coating composition comprises less than 1% by weight of non-reactive solvent and less than 1% by weight of non-reactive, solvent-dissolvable polymer.

18. The coating composition of claim 17, wherein the composition is curable.

19. The coating composition of claim 17, wherein the coating after curing has two phases, a soft phase which has a Tg between −50□ C and 0□ C and a hard phase which has a Tg between 60□ C and 120 □ C.

20. The coating composition of claim 17, wherein said composition comprises an allylic compound c) bearing at least one allylic group.

21. A method of using a coating composition as defined in claim 1, comprising: applying the coating composition to a nail and hardening (curing) the coating composition.

22. The method of claim 21, wherein the hardening (curing) comprises curing the coating composition by exposure to radiant (radiation) energy, by exposure to electron beam radiation, by exposure to heat, by exposure to chemicals or combinations thereof.

23. The coating composition of claim 1, wherein it is suitable for nail cosmetics.

24. The coating composition of claim 1, suitable for nail coatings.

25. A coating resulting from curing (hardening) the coating composition of claim 1.

26. The coating of claim 25, wherein it is a cosmetic or a nail coating.

27. (canceled)

Description

EXAMPLES

Example 1

Oligomer 1

[0064] The components and respective amounts used in oligomer 1 are shown in Table 1.

TABLE-US-00001 TABLE 1 Component Amount 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl 55.58 grams  isocyanate Triphenylphosphite 0.38 grams 2,6-Bis(1,1-dimethylethyl)-4-methylphenol 0.38 grams Bismuth Octoate 0.19 grams 2-hydroxyethyl acrylate 11.61 grams  Isobornyl Acrylate 61.0 grams Ethylene glycol-butylene glycol-adipate diol 277.27 grams 

[0065] The OH/NCO molar ratio in this example was 1.05. First, 55.58 grams of 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate, 0.38 grams of Triphenylphosphite (inhibitor), 0.38 grams of 2,6-Bis(1,1-dimethylethyl)-4-methylphenol (BHT; inhibitor), 61.0 grams of Isobornyl Acrylate, 11.61 grams of 2-hydroxyethyl acrylate and 277.27 grams of Ethylene glycol-butylene glycol-adipate diol under commercial name Piothane® 46-1300 EBA (Mn of 1300 and with molar ratio of EG/BG: 4/6) supplied by Panolam Surface Systems, were charged into a 1 L reaction flask equipped with an agitator, liquid addition funnel, thermometer and gas inlet tube. This mixture was heated to 40° C. under agitation and dry air sparge. Next, 0.19 grams of Bismuth Octoate (catalyst) were charged. After the exotherm, the reactor was heated to 85° C. The reaction was held at 85° C. for at least 3 hours, until the level of NCO % was equal to or lower than 0.06%. The heater and agitation were turned off. Once the reactor temperature cooled to 60° C., the product was poured out into a container and testing on the final properties was performed. The oligomer is recovered including isobornyl acrylate as diluent. Isobornyl acrylate in the recovered oligomer is about 15 wt %.

Properties of the Oligomer 1 of Example 1

[0066] The resulting product was a clear liquid having a viscosity of 23,700 cP (mPa.Math.s) at 60° C. (as measured by a Brookfield viscometer).

[0067] The molecular weight and polydispersity of Example 1 were determined by conventional gel permeation chromatography (GPC). A small sample was dissolved in tetrahydrofuran (THF) and injected into a liquid chromatograph (Agilent 1100 Series) equipped with HP PLGel® GPC columns (5 μm, 100 A, 250×4.6 mm; 3 μm MiniMix-E, 250×4.6 mm and 5 μm MiniMix-D, 250×4.6 mm). The components of the sample were separated by the GPC columns based on their molecular sizes in solution. The components were detected by a Hewlett-Packard 1047A® refractive index detector and recorded by Agilent HPLC Chemstation® and Polymer Laboratories GPC software. Polystyrene standards of known molecular weight and narrow dispersity were used to generate a calibration curve. The results of these tests are given in Table 2 below.

TABLE-US-00002 TABLE 2 Characteristics of oligomer 1 (without any diluent) Experimental Equivalent Theoretical OH value Mn Mw Repeating Mn Per Product Functionality (mg KOH/g) (GPC) (GPC) units, n Acrylate Oligomer 1 1.6 8.76 7,092 16,669 4 4433

[0068] The OH value of the oligomer 1 of Example 1 (with 15% isobornyl acrylate diluent) was determined by Radiometer TitreLab® TM865 Autotitrator. A 4-5 gram sample was dissolved in 25 ml tetrahydrofuran (THF), then 25 ml p-toluenesulfonyl isocyanate (TSI) reagent was added volumetrically and stirred for 10 minutes. The sample was then titrated with 0.25 M concentration tetrabutylammonium hydroxide. The results were reported in mg KOH/g by the autotitrator. Oligomer 1 (with diluent) was found to have an OH value of 7.45 mg KOH/g. Thus the OH value of oligomer 1 without diluent has an OH value of 8.76 mg KOH/g.

TABLE-US-00003 TABLE 3 Tested curable coating composition of Example 1 Oligomer 1 (including 15% isobornyl acrylate as 50 wt % diluent b) Tricyclodecane dimethanol diacrylate (diluent b) 25 wt % 3,3,5-Trimethycyclohexyl acrylate 20 wt % 1-Hydroxy-cyclohexyl-phenyl-ketone, Photoinitiator  5 wt %

Example 2

[0069]

TABLE-US-00004 TABLE 4 Tested curable coating composition of example 2 Oligomer 1 (including 15% isobornyl acrylate as diluent b) 47.3 wt % Reaction product of trimethylol propane diallyl ether  5.0 wt % and isophorone diisocyanate (allylic compound) Tricyclodecane dimethanol diacrylate 23.7 wt % 3,3,5-Trimethycyclohexyl acrylate 18.9 wt % 6% Cobalt solution 0.1% 1-Hydroxy-cyclohexyl-phenyl-ketone, Photoinitiator   5 wt %

Example 3

[0070] A new oligomer, Oligomer 2, is used for the coating composition of example 3.

[0071] The components and respective amounts used for oligomer 2 in Example 3 are shown in Table 5 below.

TABLE-US-00005 TABLE 5 Component Amount 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl 51.13 grams  isocyanate Triphenylphosphite 0.48 grams 2,6-Bis(1,1-dimethylethyl)-4-methylphenol 0.48 grams Bismuth Octoate 0.24 grams 2-hydroxyethyl acrylate 13.35 grams  Isobornyl Acrylate 79.5 grams ε-Caprolactone-lactide copolymer neopentyl 368.00 grams  glycol ester diol

[0072] The OH/NCO molar ratio in this example was 1.05. First, 51.13 grams of 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate, 0.48 grams of Triphenylphosphite (inhibitor), 0.48 grams of 2,6-Bis(1,1-dimethylethyl)-4-methylphenol (BHT; inhibitor), 79.5 grams of Isobornyl Acrylate, 13.35 grams of 2-hydroxyethyl acrylate and 368.00 grams of ε-Caprolactone-lactide copolymer neopentyl glycol ester diol (molar ratio 75/25 and Mn: 2000) under commercial name CAPA 8025D supplied by PERSTORP Company were charged into a 1 L reaction flask equipped with an agitator, liquid addition funnel, thermometer and gas inlet tube. This mixture was heated to 40° C. under agitation and dry air sparge. Next, 0.24 grams of Bismuth Octoate (catalyst) were charged. After the exotherm, the reactor was heated to 85° C. The reaction was held at 85° C. for at least 3 hours, until the level of NCO % was equal to or lower than 0.06%. The heater and agitation were turned off. Once the reactor temperature cooled to 60° C., the product was poured out into a container and testing on the final properties was performed. The oligomer is recovered including isobornyl acrylate as diluent (b). Isobornyl acrylate in the recovered oligomer 2 is about 15.5 wt %.

Properties of the Oligomer 2 of Example 3

[0073] The resulting product (oligomer 2 including isobornyl acrylate) was a clear liquid having a viscosity of 35,540 cP (mPa.Math.s) at 60° C. as measured by a Brookfield viscometer.

[0074] The molecular weight and polydispersity of oligomer 2 of Example 3 were determined by conventional gel permeation chromatography (GPC) as disclosed above for example 1. The results of these tests are given in Table 6 below.

TABLE-US-00006 TABLE 6 Characteristics of oligomer 2 (without diluent) of Example 3 Experimental Equivalent Theoretical OH value GPC GPC Repeating Mn per Product Functionality (mg KOH/g) Mn Mw Units, n Acrylate Oligomer 2 1.67 6.4 10,052 20,542 3 6019

[0075] The OH value of the Example was determined by Radiometer TitreLab® TM865 Autotitrator. Oligomer 2 (including 15.5% Isobornyl acrylate diluent) was found to have an OH value of 5.4 mg KOH/g. Thus, oligomer 2 without diluent has an OH value of 6.4 mg KOH/g.

TABLE-US-00007 TABLE 7 Tested curable coating composition with oligomer 2 of Example 3 Oligomer 2 (including 15.5% isobornyl acrylate as diluent b) 50 wt % Tricyclodecane dimethanol diacrylate 25 wt % 3,3,5-Trimethycyclohexyl acrylate 20 wt % 1-Hydroxy-cyclohexyl-phenyl-ketone, Photoinitiator  5 wt %

Curing Conditions, Test Methods for Cured Coating Compositions and Performances

[0076] The coating compositions were prepared, applied and cured on a belt conveyor UV curing system at a speed of 20 feet per minute. The curing energy is approximately 1 mJ/cm.sup.2. The exposure to UV light is about 3 seconds.

[0077] Testing methods for determining the properties of the Examples and Comparative Examples are based on standard coating testing methods. Pencil hardnesses are determined by following the ASTM D3363-05 protocol entitled “Standard Test Methods for Film Hardness by Pencil Test”. Gloss levels are determined following the ASTM D523-08 protocol entitled “Standard Test Method for Specular Gloss”. Glosses are measured using a micro-TRI-gloss-meter from BYK. The initial gloss of the cured coatings indicates the shin and sheen of the nail coatings. The higher gloss unit indicates the better shinning appearance. Flexibilities are determined with a Conical Mandrel Tester by following the ASTM D522 protocol entitled “Standard Test Methods for Mandrel Bend Test of Attached Organic Coating.” The distance from the farthest end of the crack to the closest end indicates the flexibility. The shorter crack distance indicates the better flexibility. If there are no cracks during the test, the distance may be marked as zero. Color is tested by BYK Gardner Color-Guide 45/0 (6807) Portable Colorimeter. The lightness, L*, represents the darkest black at L*=0 and the brightest white at L*=100. The color channels, a* and b*, will represent true neutral gray values at a*=0 and b*=0. The red/green opponent colors are represented along the a* axis, with green at negative a* values and red at positive a* values. The yellow/blue opponent colors are represented along the b* axis, with blue at negative b* values and yellow at positive b* values.

[0078] Soak off times are determined by immersion the glass slide with cured coatings in acetone and by checking the coating every five minutes and recording how much percentage of the coating is removed by acetone. Adhesion is determined by making an X-cut through the coating to the artificial nail, applying pressure-sensitive tape over the X-cut and removing the tape. The adhesion is assessed qualitatively on the 0 to 4 scale, where 0 means that four quadrants of the coating are removed while 4 means that none of the four quadrants of the coating is removed. Durability is determined by assessing by eye the coating integrity after soaking in vinegar, lemon juice, detergent or hand soap for a pre-determined period of time.

[0079] Table 8 below lists the properties for coating compositions of Examples 1-3.

TABLE-US-00008 TABLE 8 Properties of cured coating compositions of examples 1-3 (invention) Example 1 Example 2 Example 3 Pencil Hardness F F F Shine Initial Gloss values 20° 109 111 110 60° 118 126 120 85° 94.7 90.2 97.7 Flexibility (in) 0 = No Cracking 0 0 0 Color Change (60° C. Oven) Initial L* 92.11 90.2 91.39 a* −1.47 −2.48 −1.59 b* 5.79 9.08 6.34 After 2 days L* 92.05 90.5 91.59 a* −1.71 −1.85 −1.78 b* 6.95 7.64 7.48 After 4 days L* 91.92 90.5 91.63 a* −1.67 −1.73 −1.78 b* 7.07 7.67 7.64 Soak-off After 5 minutes in acetone 100% 100% 100% Loss Loss Loss Adhesion on artificial nail 4 4 4 Durability, After soaking 4 days in Vinegar 0% Loss 0% Loss 0% Loss Lemon Juice 0% Loss 0% Loss 0% Loss Detergent 0% Loss 0% Loss 0% Loss Hand soap 0% Loss 0% Loss 0% Loss

[0080] As can been seen, the Examples show low color change initially, after 2 days and after 4 days; show good removability in acetone and are completely removed from a nail in 5 minutes or less. The Examples also adhere well to artificial nails and are highly durable, as shown by no loss of coating after 4 days of soaking in vinegar, lemon juice, detergent and hand soap. The Examples are very flexible, with no cracking observed. The Examples demonstrate good scratch resistance. The Examples show “F” scale of pencil hardness and the Examples are all high gloss.

Comparative Examples

[0081] Example 4 is a comparative example. A new oligomer, Oligomer 3, is used for the coating composition of said example 4 as a comparative example.

[0082] The components and respective amounts used for oligomer 3 in Example 4 as comparative example are shown in Table 9 below.

TABLE-US-00009 TABLE 9 Components and proportions for Oligomer 3 Component Amount 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate 100.2 grams  Thiodiethylene bis[3-[3,5-di-tert-butyl-4-hydroxyphenyl]- 0.46 grams propionate] 2-hydroxyethyl acrylate 54.6 grams Bismuth Octoate 0.15 grams Ethylene glycol adipate diol 144.6 grams 

[0083] First, 100.2 grams of 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate, 0.46 grams of Thiodiethylene bis[3-[3,5-di-tert-butyl-4-hydroxyphenyl]propionate] (inhibitor), 54.6 grams of 2-hydroxyethyl acrylate and 144.6 grams of ethylene glycol adipate diol (Mn: 650) were charged into a 1 L reaction flask equipped with an agitator, liquid addition funnel, thermometer and gas inlet tube. This mixture was heated to 40° C. under agitation and dry air sparge. Next, 0.15 grams of Bismuth Octoate (catalyst) were charged. After the exotherm, the reactor was heated to 85° C. The reaction was held at 85° C. for at least 3 hours, until the level of NCO % was equal to or lower than 0.06%. The heater and agitation were turned off. Once the reactor temperature cooled to 60° C., the product was poured out into a container and testing on the final properties was performed. There is no monomer diluent in oligomer 3.

[0084] Table 10 below provides structural characteristics for the oligomer 3 (e.g., urethane acrylate oligomer) of Example 4 (comparative). The oligomer is a di-functional urethane acrylate without free OH groups in the backbone. Coating composition of Example 4 as comparative example includes similar amounts (e.g., wt %) of oligomers, cycloaliphatic methacrylates and photo-initiators as in Examples 1-3. However, certain characteristics of Comparative Example 4 are different than those of Examples 1-3.

TABLE-US-00010 TABLE 10 Structural Characteristics of Oligomer 3 of Example 4 as Comparative Example Equivalent Theoretical Mn Mw Mn Per Product Functionality GPC GPC n Acrylate Oligomer 3 2 2644 3634 1 1322

[0085] The oligomer 3 has a theoretical average in number-functionality of 2, a weight average molecular weight (GPC Mw) of 3,600 g/mol, a number average molecular weight (GPC Mn) of about 2,600 g/mol and an equivalent molecular weight per acrylate of about 1,300.

[0086] Table 11 below lists the ingredients and their weight % (wt %) values for coating composition of Example 4 as comparative example. The oligomer 3 (e.g., urethane acrylate without any diluent) is contained in a wt % at about 42.5%. Cycloaliphatic methacrylates as defined according to diluent b), including isobornyl acrylate, tricyclodecane dimethanol diacrylate and 3,3,5-trimethylcyclohexyl acrylate are contained in a wt % at about 52.5%. The photo-initiator is contained in a wt % at about 5%.

TABLE-US-00011 TABLE 11 Ingredients of coating composition of Example 4 as comparative example Oligomer 3 (without any diluent) 42.5 wt %   Isobonyl Acrylate 7.5 wt %  Tricyclodecane dimethanol diacrylate 25 wt % 3,3,5-Trimethycyclohexyl 20 wt % Photoinitiator  5 wt %

[0087] Table 12 below lists the properties for the cured coating composition of Example 4, as a comparative example (outside the covering of present invention), with respect to removability in acetone. As can been seen, the cured coating of Example 4 (comparative) shows poor removability in acetone for 5 minutes or less and is not completely removed until 15 minutes.

TABLE-US-00012 TABLE 12 Soak Off Properties of the cured coating composition of Example 4, as comparative example Soak off, after being soaked in acetone for Example 4  5 minutes 0% 15 minutes 100%

[0088] Furthermore, industrial standard commercial products Gelcolor supplied by Coty Inc. and Gelish supplied by Hand & Nail Harmony are used in comparison to Examples 1-4. Table 13 below lists the hardness and gloss Gelcolor and Gelish top coatings.

TABLE-US-00013 TABLE 13 Properties of OPI and Gelish nail Top Coatings Gelcolor Gelish nail top coat nail top coat Pencil Hardness F F Shine Gloss values 20° 71.7 63.8 60° 108 104 85° 93.1 95.7

[0089] As can be seen, the Gelcolor and Gelish nail top coatings, while suitably hard, do not perform as well as Examples 1-3 with respect to gloss.

[0090] Table 14 below lists the properties for Gelcolor and Gelish coatings (as used with base, color and/or top coatings) with respect to removability in acetone. As can been seen, Gelcolor and Gelish coatings shows poor removability in acetone for 5 minutes or less and are not completely removed until 30 minutes.

TABLE-US-00014 TABLE 14 Soak Off Properties of Gelcolor and Gelish Coatings OPI, Gelcolor base coat, Gelish base coat and color layer and top coat top coat Soak off, after being F F soaked in acetone for  5 mins 15%  5% 15 mins 80% 80% 30 mins 100%  100%  Adhesion on artificial 4 4 nails

[0091] Compared with the industry standard OPI soak off products (which typically include a base coat, color layer and three top coat layers) and Gelish soak off products (which typically include a base coat and two top coat layers), the soak off properties of Examples 1-3 (invention) were much shorter for complete removal.

[0092] Coating compositions of examples 1 to 3 (invention) have viscosity of 2000 cps to 9000 cP (mPa.Math.s) at room temperature. They are applicable to artificial nails by brush. After curing under Gelish LED lamp or CND UV lamp, the applied coating has a very high gloss. After wiping the surface by 99 wt % isopropanol, the coating still remain high gloss. After sitting under light at ambient temperature, the coating become shiner and shiner.

[0093] When the word “about” is used in this specification in connection with a numerical value, it is intended that the associated numerical value include a tolerance of ±10% around the stated numerical value. Moreover, when reference is made to percentages in this specification, it is intended that those percentages are based on weight, i.e., weight percentages.

[0094] It will now be apparent that a new, improved and nonobvious electronic aerosol generating article has been described in this specification with sufficient particularity as to be understood by one of ordinary skill in the art. Moreover, it will be apparent to those skilled in the art that modifications, variations, substitutions and equivalents exist for features of the electronic aerosol generating article which do not materially depart from the spirit and scope of the embodiments disclosed herein. Accordingly, it is expressly intended that all such modifications, variations, substitutions and equivalents which fall within the spirit and scope of the invention as defined by the appended claims shall be embraced by the appended claims.