Sunscreen cosmetic composition
A technology of cosmetics and chemical formulas, applied in the direction of cosmetics, skin care preparations, etc., to achieve the effects of improved adhesion, excellent ultraviolet absorption performance, and excellent product stability
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[0156] Example
[0157] The following examples illustrate the present invention in more detail, but the present invention is not limited by these examples.
[0158] [First Invention]
[0159]
Example Embodiment
[0160] "Synthesis Example 1-1: Synthesis of 2-[4-(2-ethylhexyloxy)-2-hydroxyphenyl]-2H-benzotriazole"
[0161] Add 45.4g (0.2mol) 6-(2H-benzotriazol-2-yl) resorcinol synthesized according to the conventional method into a 500ml four-necked flask equipped with a thermometer and reflux condenser, and add 50ml methyl iso Butyl ketone and 4.0 g of dimethylformamide were stirred. 25.4 g (0.24 mol) of sodium carbonate and 77.2 g (0.4 mol) of 2-ethylhexyl bromide were added thereto, and the mixture was heated to reflux temperature while stirring. Stir for 15 hours while maintaining the reflux temperature, then recover the methyl isobutyl ketone under normal pressure, and wash the remaining oil with water to remove excess sodium carbonate and generated inorganic substances. Vacuum distillation was performed from the oil to obtain 52.1 g of a yellow transparent fraction of 220-225°C / 0.2-0.3 mmHg. The compound is liquid at room temperature, the yield is 76.7%, and the HPLC purity is 99.0%. ...
Example Embodiment
[0162] "Synthesis Example 1-2: Synthesis of 2-(2-hydroxy-4-isobutoxyphenyl)-2H-benzotriazole"
[0163] Using isobutyl bromide in an equimolar amount instead of 2-ethylhexyl bromide, synthesis was performed in the same manner as in Synthesis Example 1. With a yield of 72.5%, yellowish off-white powdery crystals were obtained. m.p. 120.0~120.8°C, λmax=345.6nm, ε=21750.
[0164] Investigate the following oils from A to E to 2,4-bis[[4-(2-ethylhexyloxy)-2-hydroxy]phenyl]-6-(4-methoxyphenyl)-1, The solubility of 3,5-triazine, the results are as figure 1 Shown.
[0165] A: Isodecyl benzoate
[0166] B: 2-ethylhexyl benzoate
[0167] C: 2-Cyano-3,3-diphenyl ethylhexyl acrylate (Oclone)
[0168]
[0169] D: 2-[4-(2-Ethylhexyloxy)-2-hydroxyphenyl]-2H-benzotriazole
[0170]
[0171] E: 2-(2-hydroxy-4-isobutoxyphenyl)-2H-benzotriazole
[0172]
[0173] "Methods and conditions for solubility determination"
[0174] 2,4-bis[[4-(2-ethylhexyloxy)-2-hydroxy]phenyl]-6-(4-methoxyphenyl)-1,3,5- T...
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