Preservative containing capryloyl hydroximic acid and p-hydroxy phenyl ethyl ketone and preparation method and application of preservative and cosmetic containing preservative
A technology containing p-hydroxyacetophenone and caprylyl hydroxamic acid, which is applied in the field of cosmetics containing this preservative, can solve the problems of high irritation, high toxicity, and unsatisfactory safety, and prevent spoilage , Mild in nature, the effect of using the quality will not be reduced
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Embodiment 1
[0027] According to weight percentage, prepare 5% caprylyl hydroxamic acid, 40% p-hydroxyacetophenone, 45% 1,2-propanediol and 10% PEG-40 hydrogenated castor oil.
[0028] Put caprylyl hydroxamic acid, p-hydroxyacetophenone and 1,2-propanediol at 45°C and stir, then add PEG-40 hydrogenated castor oil, and stir at 75°C to prepare caprylyl hydroxamic acid and para-hydroxyacetophenone as a preservative, which has a pH of 3.0.
[0029] The preservative containing octanoyl hydroxamic acid and p-hydroxyacetophenone can be added to cream cosmetics at 1 wt%, and the pH of the cream cosmetics is 3.0.
Embodiment 2
[0031] According to weight percentage, prepare 30% caprylyl hydroxamic acid, 10% p-hydroxyacetophenone, 57% 1,3-butanediol and 3% PEG-40 hydrogenated castor oil.
[0032] Put caprylyl hydroxamic acid, p-hydroxyacetophenone and 1,3-butanediol at 75°C and stir, then add PEG-40 hydrogenated castor oil, and stir at 45°C to obtain caprylyl hydroxamic acid Preservative for oxamic acid and p-hydroxyacetophenone, its pH is 3.6.
[0033] 0.5 wt% of the preservative containing caprylyl hydroxamic acid and p-hydroxyacetophenone can be added to the mask liquid, and the pH of the mask liquid is 3.6.
Embodiment 3
[0035] Prepare 15% caprylyl hydroxamic acid, 25% p-hydroxyacetophenone, 35% 1,3-propanediol, 10% 1,2-pentanediol and 10% 1,2- Hexylene glycol, 2.5% PEG-40 hydrogenated castor oil and 2.5% C 12-13 alketh-9.
[0036] Caprylyl hydroxamic acid, p-hydroxyacetophenone, 1,3-propanediol, 1,2-pentanediol and 1,2-hexanediol were stirred at 55°C, and then PEG-40 hydrogenated castor oil and C 12-13 Alketh-9 was stirred at 55°C to prepare a preservative containing caprylyl hydroxamic acid and p-hydroxyacetophenone, the pH of which was 4.0.
[0037] The preservative containing octanoyl hydroxamic acid and p-hydroxyacetophenone can be added in 1.5wt% to cream cosmetics, and the pH of the cream cosmetics is 4.0.
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