Low-colloid cosmetic compositions and method for manufacturing the same

Abstract

This invention discloses a low-colloid cosmetic composition and its manufacturing method. The cosmetic composition comprises the following ingredients: 1 wt% to 5 wt% deep-sea water concentrate; 0.01 wt% to 3 wt% medium molecular weight hyaluronic acid, wherein the molecular weight of the medium molecular weight hyaluronic acid is between 50 kilodaltons (kDa) and 300 kDa; 0.05 wt% to 1 wt% high molecular weight hyaluronic acid, wherein the molecular weight of the high molecular weight hyaluronic acid is between 800 kDa and 1500 kDa; 0.5 wt% to 5 wt% butylene glycol; 0.1 wt% to 0.5 wt% vitamin E; and the balance being deionized water.

Claims

1. A low-colloid cosmetic composition comprising: 1 wt% to 5 wt% of deep-sea water concentrate; 0.01 wt% to 3 wt% of medium molecular weight hyaluronic acid, wherein the molecular weight of the medium molecular weight hyaluronic acid is between 50 kilodaltons (kDa) and 300 kDa; 0.05 wt% to 1 wt% of high molecular weight hyaluronic acid, wherein the molecular weight of the high molecular weight hyaluronic acid is between 800 kDa and 1500 kDa; 0.5 wt% to 5 wt% of butylene glycol; 0.1 wt% to 0.5 wt% of vitamin E; and the balance being deionized water; wherein, This deep-sea water concentrate was formed by molecular weight cut-off (MWCO) membrane ultrafiltration (UF) treatment, and the MWCO value of the ultrafiltration treatment was 40 kDa. The cosmetic composition forms a micro-crosslinked structure comprising a liquid-phase core formed from a deep-sea water concentrate; The hyaluronic acid cross-linked layer covering the liquid core is formed by medium molecular weight hyaluronic acid and high molecular weight hyaluronic acid; and vitamin E and butylene glycol are distributed in the peripheral area of ​​the hyaluronic acid cross-linked layer.

2. The cosmetic composition as claimed in claim 1, further comprising: Lactic acid 0.05 wt% to 0.5 wt%.

3. The cosmetic composition as claimed in claim 1, further comprising at least one preservative.

4. The cosmetic composition as claimed in claim 1, wherein, The hyaluronic acid cross-linked layer is a multi-layered cross-linked network.

5. A method for preparing the cosmetic composition as claimed in claim 1, comprising the following steps: a dissolution step: adding medium molecular weight hyaluronic acid to deionized water and homogenizing and stirring for a first preset time to form an aqueous hyaluronic acid solution; a crosslinking step: adding deep-sea water concentrate to the aqueous hyaluronic acid solution in portions and homogenizing and stirring for a second preset time to promote crosslinking between hyaluronic acids; a curing step: adding high molecular weight hyaluronic acid to the crosslinked aqueous hyaluronic acid solution in portions and homogenizing and stirring for a third preset time to form an aqueous solution in which the crosslinked hyaluronic acid molecules are cured; and a softening step: adding butylene glycol and vitamin E to the cured aqueous hyaluronic acid solution in portions and homogenizing and stirring for a fourth preset time to form a softened aqueous solution.

6. The manufacturing method as claimed in claim 5, wherein after the softening step, it further comprises: Dilution step: Add deionized water to the softened aqueous solution to adjust the concentration of the softened aqueous solution.

7. The manufacturing method as claimed in claim 5, wherein after the softening step, it further comprises: pH adjustment steps: Add lactic acid to the softened aqueous solution to adjust the pH value of the solution.

8. The manufacturing method as described in claim 5, wherein the rotational speed of the homogenizing stirrer is between 50 rpm and 150 rpm.

9. The manufacturing method as claimed in claim 8, wherein the homogenizing stirring speed of the crosslinking step is between 100 rpm and 150 rpm, and the homogenizing stirring speed of the curing step is between 50 rpm and 80 rpm.

10. The manufacturing method as claimed in claim 5, wherein the first preset time to the fourth preset time are each between 20 minutes and 30 minutes.

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