Silsesquioxanes and use in nail coatings thereof
Polyhedral oligomeric silsesquioxanes (POSS) and formulations for nail coating are disclosed. By including a POSS in the nail coating topcoat formulation, gloss and hardness of the cured nail coating are improved without compromising removability. If included in the color layer formulation, the POSS provides improved adhesion to the nail such that a base layer is not needed. Incorporating a fatty alcohol methacrylate in the topcoat formulation also improves gloss and hardness. Polyurethane copolymers can provide the cured nail coating with good solvent removability without compromising adhesion to the nail, gloss or hardness.
1. A nail coating formulation comprising a compound of formula (I):
wherein at least one R group is a group comprising polyethylene glycol units and the R groups, other than the at least one R group, are alkyl groups.
2. The nail coating formulation of claim 1 , wherein the formulation comprises about 0.1-10 wt % of the compound of formula (I).
3. The nail coating formulation of claim 1 , wherein the formulation comprises a fatty alcohol methacrylate.
4. The nail coating formulation of claim 3 , wherein the fatty alcohol methacrylate is stearyl methacrylate or cetyl methacrylate or a mixture thereof.
5. The nail coating formulation of claim 4 , wherein the formulation comprises about 0.1-10 wt % fatty alcohol methacrylate.
6. The nail coating formulation of claim 1 , wherein the formulation comprises a polyurethane.
7. The nail coating formulation of claim 6 , wherein the polyurethane is selected from the group consisting of bis-HEMA poly(1,4-butanediol)/IPDI copolymer, bis-HEMA poly(caprolactone/neopentyl glycol)/IPDI copolymer, bis-HEMA poly(caprolactone/neopentyl glycol)/1,4-butanediol/IPDI copolymer, bis-ethylhexyl poly(caprolactone neopentyl glycol)/IPDI copolymer, bis-HEMA poly(caprolactone/pentaerythritol)/IPDI copolymer, bis-ethylhexyl poly(caprolactone/pentaerythritol)/IPDI copolymer, bis-HEMA poly(caprolactone/pentaerythritol)/IPDI copolymer succinate, or bis-ethylhexyl poly(caprolactone/pentaerythritol)/IPDI copolymer succinate, and mixtures thereof.
8. The nail coating formulation of claim 1 , wherein the formulation comprises trimethylolpropane trimethacrylate.
9. The nail coating formulation of claim 8 , wherein the formulation comprises about 0.1-10 wt % of trimethylolpropane trimethacrylate.
10. The nail coating formulation of claim 1 , wherein the formulation comprises about 0.5 wt % of the compound of formula (I) and about 0.5 wt % of stearyl methacrylate.
11. The nail coating formulation of claim 1 , wherein only one R group of the compound of formula (I) is a group comprising polyethylene glycol units.
12. The nail coating formulation of claim 11 , wherein the alkyl groups of the compound of formula (I) have from 1 to 20 carbon atoms.
13. The nail coating formulation of claim 12 , wherein the alkyl groups of the compound of formula (I) are —CH 2 CH(CH 3 )CH 2 C(CH 3 ) 3 groups.
14. The nail coating formulation of claim 11 , wherein the group of the compound of formula (I) comprising polyethylene glycol units has the formula —(CH 2 ) 3 (OCH 2 CH 2 ) m OCH 3 , wherein the average value of m ranges from 1 to 50.
15. The nail coating formulation of claim 1 , wherein the compound of formula (I) is
16. A method of coating a nail comprising applying the formulation of claim 1 to a nail surface.
17. The method of claim 16 , wherein the formulation is applied directly to the nail surface.
18. The method of claim 16 , wherein the formulation is applied onto a layer of another nail coating.