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Thickening Agents In Cosmetics
ByAnay.Nilesh.KachariaAnay.Nilesh.Kacharia
Role Of Thickening Agent in Cosmetic
Principles involved in Thickening
• Stokes's law - is the basis of the falling-sphere viscometer, in which the fluid is stationary in a vertical glass tube. A sphere descends through the liquid. it reaches terminal velocity, which can be measured by the time it takes to pass two marks on the tube.
• Thixiotropy - It is a property of certain gels which tend to flow on the account of stress applied on it.
Classification Of Thickening Agents
• Lipid Thickeners- (Beeswax, Cetyl alcohol, Steryl alcohol ) • Naturally Derived thickeners- (Modified Cellulose, Guar gum, Xanthan Gum, Gelatin )
•Synthetic Thickeners- (Carbomers, Polyethylene Glycol)
• Ionic Thickeners- (Salt)
Carbomer’s• A family of Cross-Linked Acid Polymers
• They are essential ingredients in Cosmetics and Pharmaceuticals • They are Excellent Rheology Modifiers
Carbopol Polymers
• They are High Mol.Wt Polyacrylic acids, Cross-Linked with polyalkenylether
• They provide Thickening with a wide range of flow properties
Thickening Mechanism
Ingredient Weight % Function
Deionized Water 61.2 Diluent
PVP 2.5 Hair Settling Resin
Aminomethyl Propanol 0.30 Neutralizing Agent
CARBOPOL 0.5 Rheology Modifier
Wheat Protein 0.5 Conditioner
Methyl Paraben 0.5 Preservative
Ethanol 34.5 Solvent
Hair Styling Gel Formulation
Hydroxy Ethyl Cellulose
• It is derived from cellulose
• It is a non-ionic water soluble Polymer
• It can – 1) Thicken 2) Bind 3) Emulsify 4) Form Films 5) Retains Water
Salient Features Of H.E.C
• Provides a smooth and silky feel to product
• It has high ionic tolerance
• It gives an extremely high clarity in gels
• It offers good compatibility with surfactants
• Wide range of viscosities can be achived with HEC
• A purified cellulose is treated with NaOH to form a swollen alkali cellulose
• This swollen alkali cellulose is treated with ethylene oxide to get a long chains of hydroxy ethyl cellulose
Physical Properties
Problems with HEC
• CLOUDINESS tends to appear in clear solution in a short span of time
• It gives a sticky feeling on the hand over a period of time.
• It consists of 5% of volitile matter which is not accepted worldwide.
Ingredienta % weight
Gelling agent (HEC) 1
Humectant(Glycerine) 10-30
Abrasive(CaCO3) 15-40
Sweetner(Saccharin) 0.1-0.2
Flavour 1-1.5
Surface active agent 1-2
Presevative ,colour & Water qs
Toothpaste Formulation With HEC
References-
• Harrys cosmeticology
• Noveon website
• ISP Product handbook
• Lubrizol website
Thank you