Formulating High SPF Sun Care Products With A - External Factor ...

SUN CARE
LIQUID-MINERAL UV FILTER
PARSOL® SLX:
• liquid at all temperature
• stable in the pH range of 4 - 9
• stable up to 80°C for 6 hours without any loss on activity
• compatible with a wide range of organic and inorganic UV filters, common
emollients and emulsifiers
• can be formulated into O/W-, W/O- and Si/W-emulsions as well as in translucent
gels, shampoos or sprays
• no undesirable effects such as odour, discoloration, etc.
• approved in Europe at a maximum use concentration of 10% as well as in
People’s Republic of China, Taiwan, Latin America and selected Asian countries
Table 5 PARSOL® SLX – robust and easy to use
daily protection for sensitive and damaged
skin, baby and children care products
with safe sun protection or as »technical
UV-filter« in specific decorative cosmetics
(e.g. pressed powders). Additionally, Polysilicone-15
has been shown to have excellent
hair protecting properties against
UV radiation as described in (24-26).
� Conclusion
Polysilicone-15 (PARSOL® SLX) represents
a new generation of UV filters coined
»Liquid-Mineral UV Filter« by DSM Nutritional
Products, providing optimal distribution
of the chromophores on the
skin. It is an ideal complementary UVfilter,
enhancing SPF values when used
with other UV-filters in high SPF formulations.
Polysilicone-15 has excellent skin feel
and positively influences the sensorial
characteristics of a sun care product. It
also enhances the amount of sunscreen
applied on the skin and provides thus a
better protection against UV-irradiation
for the end consumers.
Because Polysilicone-15 remains on the
skin surface, it has an outstanding safety
profile. It is easy to formulate and suitable
for a broad range of high SPF and
photo-stable sun care products.
References
(1) Morganti P, Fabrizi G, New data on skin photoprotection.
International Journal of Cosmetic
Science 2000;22:305-12
(2) Wolf R, Wolf D, Morganti P, Ruocco V, Sunscreens.
Clinics in dermatology 2001;19:
452-9
(3) Lademann J, Schanzer S, Jacobi U, Schaefer
H, Pflucker F, Driller H, et al. Synergy effects
between organic and inorganic UV filters in
sunscreens. Journal of Biomedical Optics
2005;10:1-7
(4) Johncock W, Formulation of sunscreens. Favorable
and unfavorable interactions. Cosmetic
Technology (Milano) 2000;3:25-31
(5) Stockdale M, Roberts D, Multifactorial influences
on sun protection factors. Cosmetic Science
and Technology Series 1990;10:421-39
(6) Stockdale M, Sun protection factors. International
Journal of Cosmetic Science 1985;
7:235-46
(7) Brown S, Diffey BL, The effect of applied
thickness on sunscreen protection: in vivo
and in vitro studies. Photochemistry and Photobiology
1986;44:509-13
(8) Ferrero L, Pissavini M, Marguerie S, Zastrow L,
Efficiency of a continuous height distribution
model of sunscreen film geometry to predict
a realistic sun protection factor. Journal of
cosmetic science 2003;54:463-81
(9) Sayre RM, In vitro sunscreen testing: the vehicle
effect. Cosmetics & Toiletries 1992;107:
105-6, 8, 10, 12
(10) Herzog B, Prediction of sun protection factors
by calculation of transmissions with a calibrated
step film model. Journal of Cosmetic
Science 2002;53:11-26
(11) Herzog B, Mongiat S, Quass K, Deshayes C,
Prediction of sun protection factors and UVA
parameters of sunscreens by using a calibrated
step film model. Journal of Pharmaceutical
Sciences 2004;93:1780-95
(12) O'Neill JJ, Effect of film irregularities on
sunscreen efficacy. Journal of pharmaceutical
sciences 1984;73:888-91
(13) Schwarzenbach R, Huber U, Optimization of
sunscreen efficacy. SOFW Journal 2002;128:
20-3
(14) Staab HA, Einführung in die theoretische organische
Chemie. 3. edition ed: Verlag Chemie
GmbH, Weinheim; 1962
(15) Levee GJ, Sayre RM, Marlowe E, p-Aminobenzoic
acid as a sunscreen and its behavior on
the skin. International Journal of Cosmetic
Science 1981;3:49-55
(16) Herzog B, Mendrok C, Mongiat S, Müller S,
Osterwalder U, The sunscreen simulator: A
formulators tool to predict SPF and UVA parameters.
SÖFW-Journal 2003;129:2-9
(17) Klykken P, Servinski M, Thomas X, Silicone
film forming technologies for health care applications.
Dow Corning 2004
(18) Owen MJ, Siloxane surface activity. Advances
in Chemistry Series 1990;224:705-39
(19) Gonzenbach HU, Huber U, Schwarzenbach R,
Sunscreens containing benzimidazoles and
benzalmalonate-modified polysiloxanes. EP
0979 654 : (Hoffmann-La Roche, A.-G., Switz.)
2000. p. 11 pp
(20) Gonzenbach H, Hill TJ., Truscott TG, The triplet
energy levels of UVA and UVB sunscreens. J.
Photochem. Photobiol. 1992;16:377-9
(21) Gonzenbach H, Pittet G, Photostability, a
must? Proceedings of: Broad Spectrum Sun
Protection: The Issues & Status. The Commonwealth
Institute, London, March 11-12 1997
(22) Bringhen A, Berset G, Gonzenbach HU, Poster
presentation. 7th Congress of the European
Society of Photobiology, Stresa, September
1997
(23) Mendrok C, Ruembeli R, Hadfield N, Heylings
J, Schehlmann V, Klock J, In vitro study on
transdermal penetration through human epidermis
of Polysilicone-15. International Journal
of Cosmetic Science submitted
(24) Maillan P, UV protection of artificially colored
hair using a leave-on formulation. International
Journal of Cosmetic Science 2002;
24:117-22
(25) Maillan P, Gripp A, Sit F, Jermann R, Westenfelder
H, Protecting against UV - induced
degradation and enhancing shine. Cosmetics
& Toiletries 2005;120:65-6,8,70-1
(26) Maillan P, Protecting hair combability from
UV irradiation using a leave-on formulation.
Cosmetics and Toiletries Manufacture Worldwide
2003:22-6
Author’s addresses:
* Katja Berg-Schultz, Christine Mendrok,
Fintan Sit, Roland Jermann
DSM Nutritional Products Ltd.
PO Box 3255
4002 Basel
Switzerland
Correspondence:
Email: roland.jermann@dsm.com
8 SÖFW-Journal | 131 | 7-2005
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