Nail polish composition comprising a gradient polymer and the cosmetic process of treating or caring for nails
A gradient copolymer and composition technology, which can be used in medical preparations containing active ingredients, cosmetics, manicure, etc., and can solve problems such as polymer phase separation
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Embodiment 1
[0250] Embodiment 1: the bulk synthesis of gradient copolymer
[0251] The mixture of reactants is as follows:
[0252] -MONAMS: 3.0g
[0253] -SG1: 0.18g
[0254] - Ethyl acrylate: 480g i.e. 80% by weight / total weight of monomers
[0255] - Styrene: 60g i.e. 10% by weight / total weight of monomers
[0256] -Methacrylic acid: 60g i.e. 10% by weight / total weight of monomers
[0257]The combined components were mixed under a nitrogen atmosphere in the absence of solvent, then heated for 198 minutes at a temperature maintained between 110 and 115°C. The reaction was stopped at 60% conversion.
[0258] The simulated calculation of the gradient gives figure 2 the curve shown. Theoretical predictions lead to an incorporation of 30% (styrene / methacrylic acid) mixture and 70% ethyl acrylate.
[0259] Monitoring of the relative concentrations of the three monomers by gas chromatographic and NMR analysis of the polymer confirmed this model. By these methods, the final chemica...
Embodiment 2
[0269] Example 2: Bulk synthesis of gradient copolymers
[0270] Various copolymers were prepared according to the procedure described in Example 1, starting from the reactant mixture as follows:
[0271] -MONAMS: 3.0g
[0272] -SG1: 0.18g
[0273] - Styrene: 60g
[0274] -Methacrylic acid: 60g
[0275] Example
Embodiment 3
[0276] Example 3: Synthesis carried out in the presence of a solvent
[0277] The same synthesis as in Example 1 was carried out except in the presence of a solvent.
[0278] The mixture of reactants is as follows:
[0279] -MONAMS: 3.43g
[0280] -SG1: 0.2g
[0281] - Ethyl acrylate: 336g
[0282] - Styrene: 42g
[0283] -Methacrylic acid: 42g
[0284] -Toluene: 180g
[0285] The combined components were mixed in toluene as solvent under nitrogen atmosphere and then heated for 198 minutes at a temperature maintained between 110 and 115°C.
[0286] The final conversion was 82% and the resulting solids level was 57.2% by weight.
[0287] The following analysis results were obtained:
[0288] Mn=30 570 g / mol, Mw=50 500 g / mol and PI=1.65. The degree of dispersion (or w) of the composition was 2.0.
[0289] The final composition of the copolymer was given by liquid adsorption chromatography (LAC), which showed a similar composition to the copolymer prepared in Example ...
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