Tensing and/or film-forming cosmetic agent consisting of galactomannans and cross-linked sulphated galactans
A cosmetic or dermocosmetic agent consisting of: galactomannans having molecular weights between 5 and 630 kDa, and crosslinked sulfated galactans having molecular weights between 7 and 3000 kDa. Methods of using the agent, including for skin tensing and rejuvenation.
1. A cosmetic or dermocosmetic agent, said cosmetic or dermocosmetic agent being film-forming on the surface of the skin and having a tensing effect when solubilized with water, the cosmetic or dermocosmetic agent consisting of:
hydrolyzed, soluble galactomannans having a low viscosity of less than 1000 centipoise when solubilized with water and average molecular weights between 5 and 120 kDa in an amount from 65 to 90% by weight,
hydrolyzed, soluble crosslinked sulfated galactans having a low viscosity of less than 1000 centipoise when solubilized with water and average molecular weights between 7 and 1100 kDa in an amount from 10 to 35% by weight.
2. The cosmetic or dermocosmetic agent according to claim 1 , characterized in that the galactomannans are obtained by hydrolysis of native galactomannans from Caesalpinia spinosa , from Cyamopsis tetragonoloba , from Ceratonia siliqua , from Cassia angustifolia , from Cassia fistula , from Cassia obtusifolia or Cassia tora , from Gleditsia sinensis , from Gleditsia triacanthos , from Sophora japonica and/or from Trigonella foenum - graecum.
3. The cosmetic or dermocosmetic agent according to claim 1 , characterized in that the galactomannans have an average molecular weight between 8 and 80 kDa.
4. The cosmetic or dermocosmetic agent according to claim 1 , characterized in that the crosslinked sulfated galactans are obtained by hydrolysis of native sulfated galactans from Kappaphycus alvarezii , from Eucheuma cottonii , from Chondrus crispus , from Gigartina skottsbergii , from Sarcothalia crispata , from Kappaphycus striatum , from Eucheuma spinosum , from Fucellaria fastigiata , from Gelidium sesquipedale , from Polysiphonia lanosa and/or from Codium fragile.
5. The cosmetic or dermocosmetic agent according to claim 1 , characterized in that the crosslinked sulfated galactans have an average molecular weight between 8 and 200 kDa.
6. The cosmetic or dermocosmetic agent according to claim 1 , characterized in that the sulfated galactans are crosslinked with a crosslinking agent of ionic nature.
7. The agent according to claim 1 , wherein the agent has a function of protecting skin.
8. The agent according to claim 1 , wherein the agent protects skin against penetration of toxic molecules.
9. The agent according to claim 1 , wherein the agent combats unsightly manifestations of skin aging.
10. A cosmetic composition suitable for topical application on the human skin, the cosmetic composition comprising at least 0.01% of a cosmetic or dermocosmetic agent according to claim 1 .
11. A cosmetic method for improving skin, characterized in that it consists in applying the cosmetic composition according to claim 10 on the skin.
12. The cosmetic method according to claim 11 , wherein the application improves the radiance of the skin.
13. The cosmetic method according to claim 11 , wherein the application combats unsightly manifestations of skin aging.
14. A cosmetic method, the method comprising applying the composition of claim 10 on skin, and thereby tensing the skin and/or forming a film on the skin.
15. A cosmetic method, the method comprising applying the composition of claim 10 on skin, and thereby improving the radiance of the skin and/or smoothening the skin.
16. A cosmetic method, the method comprising applying the composition of claim 10 on skin, and thereby improving a barrier effect of the skin.