PROPYLENE GLYCOL HYALURONATE, AND SKINCARE PREPARATION FOR EXTERNAL USE COMPRISING SAME
A propylene glycol hyaluronate having an esterification degree of from 10 to 90% and a limiting viscosity of less than 3 dL/g has an excellent percutaneous absorption-promoting effect, and is widely usable as cosmetics and pharmaceutical products.
1 . A propylene glycol hyaluronate having an esterification degree of from 10 to 90% and a limiting viscosity of less than 3 dL/g.
2 . A propylene glycol hyaluronate according to claim 1 , having an esterification degree of from 10 to 90% and a limiting viscosity of from 0.3 to 2.0 dL/g.
3 . A propylene glycol hyaluronate according to claim 1 , having an esterification degree of from 10 to 90% and a limiting viscosity of from 0.4 to 1.6 dL/g.
4 . A propylene glycol hyaluronate according to claim 1 , having an esterification degree of from 20 to 80% and a limiting viscosity of less than 3 dL/g.
5 . A propylene glycol hyaluronate according to claim 1 , having an esterification degree of from 20 to 80% and a limiting viscosity of from 0.3 to 2.0 dL/g.
6 . A propylene glycol hyaluronate according to claim 1 , having an esterification degree of from 20 to 80% and a limiting viscosity of from 0.4 to 1.6 dL/g.
7 . A propylene glycol hyaluronate according to claim 1 , having an esterification degree of from 25 to 73% and a limiting viscosity of less than 3 dL/g.
8 . A propylene glycol hyaluronate according to claim 1 , having an esterification degree of from 25 to 73% and a limiting viscosity of from 0.3 to 2.0 dL/g.
9 . A propylene glycol hyaluronate according to claim 1 , having an esterification degree of from 25 to 73% and a limiting viscosity of from 0.4 to 1.6 dL/g.
10 . A composition comprising the propylene glycol hyaluronate of claim 1 and a cosmetically or pharmaceutically active compound.
11 . The composition according to claim 10 , wherein the cosmetically or pharmaceutically active compound is a skin-whitening active compound.
12 . A skincare preparation for external use comprising the propylene glycol hyaluronate of claim 1 .
13 . A moisturizer comprising the propylene glycol hyaluronate of claim 1 .
14 . An emulsion comprising the propylene glycol hyaluronate of claim 1 .
15 . A skin whitener comprising the propylene glycol hyaluronate of claim 1 and a skin-whitening active compound.
16 . The skin whitener according to claim 15 , wherein the skin-whitening active compound is arbutin, kojic acid or an ascorbic acid derivative.