Carbomer 940, also known as Carbopol 940, is a high molecular weight polymer of acrylic acid, cross-linked with polyalkenyl ethers or divinyl glycol. It is widely used in the cosmetics and personal care industry as a thickening, suspending, and stabilizing agent.
INCI Name:
Carbomer
CAS Number:
9003-01-4
Chemical Formula:
(C3H4O2)n
Uses:
- Thickening Agent: Carbomer 940 is commonly used to thicken formulations, providing a smooth and gel-like consistency.
- Emulsion Stabilizer: It helps to stabilize emulsions, preventing the separation of oil and water phases.
- Suspending Agent: Effective in suspending insoluble ingredients within a formulation, ensuring even distribution.
- Controlled Release Agent: Used in pharmaceuticals for controlled drug release applications.
- Rheology Modifier: Adjusts the viscosity and flow characteristics of cosmetic and personal care products.
Applications:
- Skin Care Products: Creams, lotions, and gels.
- Hair Care Products: Styling gels and conditioners.
- Personal Hygiene Products: Hand sanitizers and toothpaste.
- Pharmaceuticals: Topical gels and ointments.
Usage Guidelines:
- Concentration: Typically used at concentrations between 0.1% and 1% in formulations.
- Neutralization: Requires neutralization with a base (e.g., triethanolamine, sodium hydroxide) to activate its thickening properties.
- Hydration: Should be dispersed in water and allowed to hydrate before neutralization to avoid clumping.
Formulation Tips:
- Dispersion: Slowly sprinkle Carbomer 940 into the aqueous phase while mixing to avoid clumping.
- Hydration: Allow the polymer to hydrate fully (usually 30 minutes to 1 hour) before neutralization.
- Neutralization: Add a neutralizing agent gradually while stirring until the desired pH and viscosity are achieved.
- Avoid Electrolytes: High concentrations of electrolytes can reduce the thickening efficiency of Carbomer 940.
Additional Information:
- Appearance: White, fluffy powder.
- Solubility: Insoluble in water but swells in water to form a clear, viscous gel.
- pH Stability: Effective in the pH range of 4 to 10.
- Storage: Store in a cool, dry place away from direct sunlight and moisture.
Safety:
- Irritation: Generally considered non-irritating and safe for use in cosmetic products.
- Handling: Use protective equipment (gloves, mask) to avoid inhalation of fine powder.