Dow Corning RM 2051 Thickening Agent Thickening and Emulsifying Polymer in Dimethicone
Properties INTERNAL PHASE: Water droplets containing Na Polyacrylate CONTINIOUS PHASE: Dimethicone (Dow Corning 200 Fluid 5 cst) and Cyclopentasiloxane (Dow Corning 245 Fluid) INCI Name: Sodium Polyacrylate, Dimethicone, Cyclopentasiloxane, Trideceth-6, PEG/ PPG 18/18 Dimethicone Description: Water in silicone emulsion with Sodium Polyacrylate in the water phase Appearance: Viscous liquid pale yellow Viscosity: 1000-4000 cps Thickener Polymer: 24-28 % Silicone Content: ~ 29% Flash Point: >100 C D4 content: < 1% Shelf Life: 9 months
Mechanism HYDRATION Sodium Polyacrylate is dispersed in silicone together with an inverting surfactant When Dow Corning RM 2051 Thickening Agent is mixed with water, the inverting surfactant helps bring water in contact with the polymer The polymer blooms into the water phase Both emulsification and thickening can be achieved from the same ingredient Product is designed for gels, O/W or Si/W emulsions
Appearance in water 5% dispersion of Dow Corning RM 2051 at 400x magnification
Dow Corning RM 2051 Thickening Agent : Key Benefits Multifunctional product : thickening and emulsifying Ready and Easy-to-use fluid emulsion Silicone carrier that provides aesthetics Designed for formulating with elastomers, gum blends and other hard to emulsify silicones Provides smooth, non greasy and non sticky formulations
Comparison to competitive products Main products seen in the Market are based on carrier oils such as Isoparaffin, mineral oil, polyisobutene Dow Corning RM 2051 Thickening Agent carrier is Dimethicone and Cyclopentasiloxane
Ease of use Poor Dow Corning RM 2051 Add Water Mix Instantaneous gelification Liquid form No pre-mixing No neutralization No heating Gels are instantaneously obtained by simply adding water 5% dispersion of Dow Corning RM 2051 Thickening Agent in water
Thickening effect 80000 70000 Viscosity (cps) Brookfield RVII 10 RPM 60000 50000 40000 30000 20000 Linear thickening effect which facilitates optimization of fluid formulations To obtain thick gels, 5 % addition level is recommended 10000 0 0 2 4 6 8 10 12 % Dow Corning RM 2051 Thickening Agent
ph influence Viscosity vs. ph (5% Dow Corning RM 2051 Thickening Agent in w ater) Viscosity (cps) Brookfiel RV II 10 RPM 60000 50000 40000 30000 20000 10000 0 2.00 4.00 6.00 8.00 10.00 12.00 14.00 ph Effective ph : 5.5 11 Suitable for use in high ph products Not recommended for use in acid conditions
Electrolytes effect Viscosity (cps) Brookfield RV II 10RPM 35000 30000 25000 20000 15000 10000 5000 0 5% Dow Corning RM 2051 Thickening Agent 3% Dow Corning RM 2051 Thickening Agent 0 0.2 0.4 0.6 0.8 NaCl concentration (%) Addition of electrolytes results in a reduction of the viscosity Can be overcome by increasing the amount of thickener used
Polar solvents effect 60000 50000 Viscosity (cps) Brookfield RV II 10RPM) 40000 30000 20000 10000 0 Reference (No solvent) Ethanol (30%) Acetone (30%) Glycerine (50%) Propylene Glycol (50%) Dow Corning RM 2051 Thickening Agent thickens with high solvent content
Surfactants effect 30000 Viscosity (cps) Brookfield RV II 10 RPM 25000 20000 15000 10000 5000 0 0 5 10 15 10% Sodium Laureth Sulfate 4% Cocamidopropylbetaine 2.75% Decyl Glucoside % Dow Corning RM 2051 Thickening Agent Compatible with non ionics surfactants Thickening efficiency reduced with ionic surfactants
Rheological profile Viscosity (Poise) 10000 1000 100 10 1.5% Dow Corning RM 2051 Thickening agent 3.5% Dow Corning RM 2051 Thickening Agent 1 0 100 200 300 400 Shear Rate (/sec) Shear-thinning behaviour : Very high viscosity at low shear rate Low viscosity at high shear rate
Emulsifying Properties Emulsify high amount of oil phase (3% of Dow Corning RM 2051 Thickening Agent) SILICONE ESTER HYDROCARBONS Dow Corning 1501 Fluid 40 % Isopropyl Myristate 30 % Mineral oil 50 % Viscosity (Sp5-10RPM) 80200 cps 38500 cps 82700 cps Stability > 2 month at 40 C > 2 month at 40 C > 2 month at 40 C 1% of Dow Corning RM 2051 Thickening Agent can emulsify «hard to disperse» silicones Dow Corning 9040 Silicone Elastomer Blend 10 % Dow Corning 200 Fluid 300 000 cst 5 % Dow Corning 1501 10 % Viscosity (Sp5-10RPM) 10700 cps 6500cPs 7820 cps Stability > 2 month at 40 C > 2 month at 40 C > 2 month at 40 C
Sensory Profile Before Absorption Paired test (18 panelists) Formulation: 3% Thickener 3% Glycerin 0.3% Biocide qs water After Absorption Sliperiness Tackiness (99%) Gloss 8 6 4 2 0 Absorbency (95%) Film residue Greasiness Wetness 8 6 4 2 0 Tackiness (99.9%) Spreadability -- Dow Corning RM 2051 Thickening Agent -- Polyacrylamide/C13-14 Isoparaffin/Laureth-7 Smoothness Dow Corning RM 2051 Thickening Agent offers improved attributes versus a current market product based on Isoparaffin with regard to speed of absorbency and reduction of tackiness
Sensory Profile Paired test (18 panelists) Formulation: After Absorption Sliperiness 3% Thickener 3% Glycerin 0.3% Biocide qs water Gloss 10 8 6 4 2 0 Before Absorption Absorbency Film residue Wetness (99.9%) 8 6 4 2 0 Tackiness (99.9%) -- Dow Corning RM 2051 Thickening Agent -- Sodium Acrylates Copolymer/Mineral oil/ppg-1 Trideceth-6 Spreadability (99.9%) Tackiness Greasiness Smoothness Dow Corning RM 2051 Thickening Agent offers improved attributes versus a current market product based on Mineral oil with regard to wetness, spreadability and reduction of tackiness
Compatibility Compatible with formulations containing: A wide range of mineral and organic oils, Silicones, Esters, Sunscreens, Vitamins,
Potential applications Suitable in Skin and Hair care formulations Formulation tips : Suggested level : 3-6 % Can be used with high solvent content (30% ethanol, isopropyl alcohol or acetone, 50% glycerin or propylene glycol) O/W or Si/W emulsions can be easily prepared by adding Dow Corning RM 2051 Thickening Agent in the oil phase Not recommended for ionic surfactant based formulations Avoid salt and acid ph
For more information If you have any further questions or comments please contact your local Dow Corning representative Thank you for your attention