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AssigneeMycone Dental Corporation
InventorsJoseph E. Kozacheck, George M. Lein
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Limited shelf life due to pigment settling and the formation of hard packs in pigmented UV curable nail gels is solved by the present invention which describes a composition, method, and use of a UV curable, thixotropic, radiation curable, low viscosity gel comprised of a formulation containing thixotropic additive(s) and in some cases dispersants for additional dispersion stability. The thixotropic pigmented gel has prolonged shelf life and long time storage at ambient conditions. It also contains negligible amounts of unreactive solvent. The thixotropic additive also changes the rheological properties of the gel, which allows the nail gel to be easily applied to nails at a lower viscosity due to shear thinning.
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The composition of claim 23 having a viscosity reduction of at least a factor of 1.5 over the range of shear from when the sample is at rest to that encountered under use conditions.
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The composition of claim 23 that is shelf stable and pigment does not settle out wherein the high shear viscosity is less than 20 poise.
The composition of claim 23 that is shelf stable and pigment does not settle out wherein the low shear viscosity is greater than 15 poise.
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The composition according to claim 23 that is shelf stable and pigment does not settle out at low shear rates from 10−4/sec to 10−6/sec.
The composition according to claim 23 where the reactive monomers selected from one or more ethylenically unsaturated monomers, and one or more ethylenically unsaturated oligomers, or mixtures thereof, is in amounts greater than 60 wt %.
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The composition according to claim 23 where the reactive monomers selected from one or more ethylenically unsaturated monomers, and one or more ethylenically unsaturated oligomers, or mixtures thereof, is in amounts greater than 60 wt %.
The composition according to claim 23 where the reactive monomers selected from one or more ethylenically unsaturated monomers, and one or more ethylenically unsaturated oligomers, or mixtures thereof, is in amounts greater than 60 wt %, and contains less than 1 wt % unreactive solvent.
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The composition according to claim 23 where the reactive monomers selected from one or more ethylenically unsaturated monomers, and one or more ethylenically unsaturated oligomers, or mixtures thereof, is in amounts greater than 80 wt %.
The composition according to claim 23 where the reactive monomers selected from one or more ethylenically unsaturated monomers, and one or more ethylenically unsaturated oligomers, or mixtures thereof, is in amounts greater than 80 wt %, and contains less than 1 wt % unreactive solvent.
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The composition according to claim 23 where the reactive monomers selected from one or more ethylenically unsaturated monomers, and one or more ethylenically unsaturated oligomers, or mixtures thereof, is in amounts greater than 90 wt %.
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A shelf stable, pigment containing, UV-curable, low viscosity nail gel coating composition useful for adornment of natural and artificial nails and artificial nail extensions comprising:
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Dependencies are inferred from the claim text.