Use of Transmission Dyes for Protecting Human Skin From Browning and Ageing
AssigneeBASF SE
InventorsStefan Müller, Jurg Haase, Thomas Ehlis, Gilbert Kreyer, Jochen Giesinger, Martin Vogt
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Abstract
Disclosed is the use of an aqueous dispersion comprising (a) a micronized sparingly soluble organic compound which has a UV-Vis spectrum with a maximum from 380 to 420 nm; and (b) an anionic dispersing agent for protecting the human skin from browning and skin aging.
Claims11
A method for the protection of human skin from browning and skin aging wherein said method comprises applying to said skin an effective amount of an aqueous dispersion comprising
- (a) a micronized sparingly soluble organic compound which has a UV-Vis spectrum with a maximum from 380 to 420 nm;
- and
- (b) a dispersing agent selected from anionic, non-ionic and amphoteric surfactants.
A crystalline form of the compound of formula
- wherein the crystalline form is characterized by an X-ray diffraction pattern and obtained using Cu-Kα-radiation which exhibits diffraction angles (2Θ) as seen below:
- 2-Theta Scale
- Lin [Cps]
- 6
- 470
- 10.2
- 870
- 11.3
- 1200
- 12.0
- 1220
- 12.3
- 1200
- 15.8
- 1220
- 16.2
- 1520
- 18.0
- 980
- 19.3
- 1040
- 20.0
- 1750
- 21.0
- 1000
- 21.7
- 870
- 23.0
- 1000
- 26.7
- 570
A crystalline form of the compound of formula
- wherein the crystalline form is characterized by an X-ray diffraction pattern and obtained using Cu-Kα-radiation which exhibits diffraction angles (2Θ) as seen below:
- 2-Theta Scale
- Lin [Cps]
- 8.5
- 2080
- 10.5
- 1450
- 12.7
- 400
- 13.8
- 430
- 14.5
- 940
- 15.3
- 420
- 11.8
- 2050
- 18.0
- 350
- 19.8
- 1350
- 20.8
- 950
- 22.8
- 530
- 25.7
- 600
- 30.7
- 300
A crystalline form of the compound of formula
- wherein the crystalline form is characterized by an X-ray diffraction pattern and obtained using Cu-Kα-radiation which exhibits diffraction angles (2Θ) as seen below:
- 2-Theta Scale
- Lin [Cps]
- 7.3
- 4300
- 10.0
- 3530
- 12.5
- 1000
- 13.8
- 1220
- 14.5
- 2800
- 15.2
- 1400
- 16.2
- 930
- 17.0
- 3800
- 18.0
- 1150
- 19.5
- 4600
- 21.0
- 2800
- 22.7
- 1650
- 28.0
- 700
- 30.8
- 800
Dependencies are inferred from the claim text.