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Polyurethanes for Cosmetics
Baycusan® Polyurethane Dispersions and Polyurea Powder for skin and sun Care
Important characteristic are:
- SPF Boosting effect
- Outstanding water resistance
- Stabilization properties
- No “balling” effect
- Non-greasy and non-sticky afterfeel on skin
- High formulation flexibility
- Easy to use
Sunscreen sprays and lotions can benefit in a variety of ways when formulated with the polyurethane dispersion Baycusan® C 1000. Although the film-forming polymer itself does not contain any UV-absorbing components, it can boost the sun protection factor (SPF) of a formulation. In addition to having a pleasant skin feel, it also stabilizes emulsions – important particularly for sprays – and lends sun care products very good water resistance.
New test results confirm the varied benefits of Baycusan® C 1000, which contains neither co-solvents nor preservatives. It has been confirmed, for example, that Baycusan® C 1000 not only shows an SPF-boosting effect in formulations that include the UVB filters octocrylene and ethylhexyl triazone, but significantly increases the SPF of formulations based on broadband UV filters such as bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT) and benzophenone-3.
Baycusan® C 1000 polyurethane dispersion also acts as a stabilizing ingredient for oil-in-water (O/W) emulsions. Scientists at Bayer MaterialScience took advantage of this property to develop a sunscreen spray with a very low concentration of emulsifier. This low-viscosity formulation exhibits high water resistance, as confirmed by in-vivo tests conducted in accordance with guidelines established by Colipa, the European Cosmetics Association.
There are also new results regarding the film-forming properties of Baycusan® C 1000. A film of the polyurethane dispersion on artificial skin withstood mechanical stress with virtually no visible damage, unlike the acrylate copolymer film it was compared to. Films based on Baycusan® C 1000 polyurethane dispersion are very flexible, move with the skin and allow it to breathe, making sunscreens formulated with this dispersion very comfortable to wear.
Watch this interview by CosmeticsDesign-Europe on the SPF boosting properties of Baycusan® C 1000.
Article: Film-forming polymer increases sun protection
More information on Baycusan® C 1000 in sun care formulations
Formulations for Sun Care products
- Sun Lotion SPF 25
- Sun Lotion SPF 30
- Sun Lotion SPF 25
- Sun Lotion SPF 50 (FDA)
- Sun Spray SPF 20
The non film-forming polyurea powder Baycusan® C 1005 is suitable for dry or liquid products, high- and low-viscosity products such as lotions, creams and sprays. This polyurea powder imparts smoothness during the application process and leaves a powdery velvety, non-greasy, non-tacky feeling on the skin.
Applications are e.g.: Skin care, Body care, Face masks and Sunscreen products.
