Spray Sunscreen SPF 20

Spray Sunscreen SPF 20

Lubrizol Advanced Materials, Inc.

Posted: June 30, 2010 15:29 PM CDT

This SPF 20 sprayable sunscreen protects and soothes skin. It is not greasy and has a uniquely dry after feel, due to the cyclomethicone-like skin feel and additional emolliency of the added esters. This milky formulation is stable while maintaining sprayable flow characteristics. Furthermore, there is no need for tedious HLB calculations.

Application: Sun Care

Formula Procedure

In as suitable vessel, combine A in order and mix until uniform. In a separate vessel, combine B and heat to 45-50°C until dissolved. Cool B to 25°C. Sprinkle C into B. Mix until polymer is dispersed in oil. Slowly add B to A with vigorous agitation (2,500 rpm for 20 min). Neutralize batch with D and mix until uniform. Add E to batch and mix until uniform. Product Properties: Appearance: White liquid pH: 6.5 – 7.0 Viscosity (mPa•s)**: 2,200 – 3,200 SPF***: Static: 24 Stability: Passed 3 months @ 45°C, 4 cycles freeze/thaw ** Brookfield DV-II+Pro @ 20 rpm, #3 spindle, measured after 24 hours. *** SPF and UVA SPF determined by in vitro testing using the Labsphere® UV-1000 UV Analyzer.

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