Formulating Hydroalcoholic Gels with Carbopol Technical ... - Lubrizol

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Lubrizol Advanced Materials’ rheology modifiers are efficient ingredients to provide thickening, stabilization and suspension of these types of formulations. Carbopol polymers are the preferred polymers to provide cost effective and aesthetically pleasing hand sanitizing gels. The use of Carbopol polymers will create thick clear gels that will prevent dripping and will maximize contact of alcohol on the skin for optimum performance. Benefits • Quickly kills bacteria when water is not available. • Quickly evaporates on application requiring no need for rinsing or drying of the hands. • Consumer convenience over ordinary hand washing with soap and water. • Emollients, botanical extracts, moisturizers and fragrances can all be incorporated and are compatible -- thus helping to provide additional functional benefits such as conditioning. TDS-255 Formulating Hydroalcoholic Gels with Carbopol ® Polymers Page 2 of 6 Polymer Selection Although all Carbopol polymers can thicken hydroalcoholic systems, several grades offer advantages such as higher clarity, better efficiency, ease of handling and better overall aesthetics for hand sanitizing gels. All three of our Carbopol Ultrez polymers are good rheology modifiers for these gels. A typical hand sanitizing gel contains less than 40 wt% deionized water. Due to this constraint, the low dispersion viscosity, as well as the processing ease, makes the Carbopol Ultrez polymers well-suited for these types of formulations as compared to the more traditional polymer grades. The following table will assist in polymer selection. Carbopol ® Polymer Ultrez 10 Ultrez 21 Ultrez 20 980 940 HSG Viscosity*, >0.2 wt% �� Clarity �� Electrolyte Tolerance � �� Smoothness after use �� Ease of dispersion �� Balling or Pilling** � �� Preferred � Lower performance *The HSG Viscosity references the formulation viscosity of the Hand Sanitizing Gel shown in table below **The more checks the less pilling of system occurs Screening Formulation for Carbopol Polymer Comparison Use Level of Carbopol ® Polymer 0.1 wt% 0.2 wt% 0.3 wt% 0.4 wt% 0.5 wt% Deionized Water (wt%) 39.8 39.6 39.4 39.2 39.0 Ethanol (wt%) 60.0 60.0 60.0 60.0 60.0 TEA (wt%) 0.1 0.2 0.3 0.4 0.5
Clarity Results: %Transmittance at 420 nm Clarity, %T 100 90 80 70 60 50 40 30 20 10 0 TDS-255 Formulating Hydroalcoholic Gels with Carbopol ® Polymers Page 3 of 6 Clarity of Hand Sanitizing Gels 0.10% 0.30% 0.50% Polymer Concentration, wt% TS Viscosity Results: Brookfield RVT, 20 rpm @ 25°C Viscosity, mPa•s 25,000 20,000 15,000 10,000 5,000 0 Viscosity of Hand Sanitizing Gels 0.10% 0.30% 0.50% Polymer Concentration, wt% TS Carbopol® 940 Polymer Carbopol® 980 Polymer Carbopol® Ultrez 10 Polymer Carbopol® Ultrez 21 Polymer Carbopol® Ultrez 20 Polymer Carbopol® 940 Polymer Carbopol® 980 Polymer Carbopol® Ultrez 10 Polymer Carbopol® Ultrez 21 Polymer Carbopol® Ultrez 20 Polymer
Page 1: TECHNICAL DATA SHEET TDS-255 Editio
Page 5 and 6: Formulation and Manufacturing Guide

Formulating Hydroalcoholic Gels with Carbopol Technical ... - Lubrizol

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