Using Acrylates/C10-30 Alkyl Acrylate Crosspolymer and Xanthan Gum Together

Yes, Acrylates/C10-30 Alkyl Acrylate Crosspolymer (which is a type of Carbomer) and Xanthan Gum can be used together in a gel cream formulation. Combining different thickeners is a common practice in cosmetic formulation to achieve specific textures, stability, and flow properties that might not be possible with a single thickener.

Incorporation Method

Both thickeners are typically incorporated into the water phase, but they have different activation mechanisms:

• Xanthan Gum: This is usually dispersed in the water phase with high-speed stirring until fully hydrated and a gel forms. If your formula contains glycerin or oil, you can pre-disperse the Xanthan Gum in one of these before adding to water to help prevent clumping and improve dispersion.
• Acrylates/C10-30 Alkyl Acrylate Crosspolymer (Carbomer): This type of Carbomer requires neutralization with an alkali (such as Triethanolamine or Sodium Hydroxide) to swell and form a gel. It is dispersed in the water phase, and the alkali is added afterwards to activate the thickening.

A common method when using both is to disperse both thickeners separately in the water phase (or pre-disperse Xanthan Gum in glycerin/oil then add to water phase) before adding the neutralizing agent for the Carbomer. Ensure both are well dispersed before proceeding. Avoid excessive high-speed blending after the Carbomer has been neutralized, as this can damage the polymer structure and reduce viscosity.

The exact method and order of addition can depend on the specific grades of thickeners used and the overall formula composition, but incorporating them into the water phase and neutralizing the Carbomer are key steps.