Suncare compositions with new cosmetic raw materials (7)
Publication Date: 2015-Dec-18
The IP.com Prior Art Database
Disclosed is the use of new cosmetic ingredients in suncare and daily care compositions. (7) O/W and anhydrous systems with new thickeners
Cosmetic or pharmaceutical preparations may exist in a wide variety of preparation forms, for example, creams (more or less viscous) such as O/W, W/O, O/W/O, W/O/W, PIT emulsions or micro-emulsions, gels, lotions, milks, sprays in aerosol as well as in pump form, alcoholic or aqueous/alcoholic lotions, milks, wax/fat compositions, stick preparations, powders, tablets, foams, ointments, etc…
The described cosmetic or pharmaceutical preparations are distinguished by excellent protection of human skin against the damaging effect of sunlight.
As water- and oil-containing emulsions (e.g. W/O, O/W, O/W/O and W/O/W emulsions or microemulsions) the preparations contain, for example, from 0.1 to 30 % by weight, preferably from 0.1 to 15 % by weight and especially from 0.5 to 10 % by weight, based on the total weight of the composition, of one or more UV absorbers, from 1 to 60 % by weight, especially from 5 to 50 % by weight and preferably from 10 to 35 % by weight, based on the total weight of the composition, of at least one oil component, from 0 to 30 % by weight, especially from 1 to 30 % by weight und preferably from 4 to 20 % by weight, based on the total weight of the composition, of at least one emulsifier, from 10 to 90 % by weight, especially from 30 to 90 % by weight, based on the total weight of the composition, of water, and from 0 to 88.9 % by weight, especially from 1 to 50 % by weight, of further cosmetically acceptable adjuvants.
The described cosmetic or pharmaceutical compositions/preparations may contain one or one more compounds as described below.
As emollients, we intend any oil phase ingredients that provide emolliency on skin. Such ingredients could act as solvents for UV absorbers and as dispersants for sunscreens/pigments. Usually, they exert a positive influence on the overall skin sensory properties of cosmetic or pharmaceutical preparation. The spreading ability is an important and objective criterion to distribute uniformly and homogeneously the UV filters on skin for an optimized UV protection.
Solvent property is expressed, for example, via its ability to keep dissolved crystalline UV absorbers inside the oil phase. Dispersing effect is expressed via the ability to prevent agglomeration of the particulate UV filters and undesirable whitening effect on skin.
The efficiency of the overall UV protection will be significantly increased when optimized solubility of organic UV absorbers and dispersion of particulate UV filters are achieved.
Furthermore, emollients can exhibit some photostabilizing function on UV absorbers and compensate the fact that some UV absorbers are prone to photodecay. Most of those specific emollients are solvents with medium to high polarity.
As emulsifier systems, we intend any structural elements used primary to stabilize the cosmetic or pharmaceutical preparation by reducing the interfacial tension between the oil and the water. Such category of ingredient...