Difference between Carbomer U20 (equivalent to Carbopol Ultrez 20) and Pro Polymer

Both Carbomer U20 and Pro Polymer are effective thickeners used to create gel textures in cosmetic formulations, particularly in water-based systems. They share the same INCI name, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, and both offer good resistance to electrolytes.

However, there are some key differences in their properties and usage:

• Ease of Dispersion: Carbomer U20 is designed for easy dispersion and can be blended relatively quickly after adding to water to form a gel.
• Mixing Method: Pro Polymer requires slower stirring initially (3-5 minutes) and benefits from a longer hydration time (up to 1 day is recommended for full absorption) before final blending, especially in formulas without glycerin or propylene glycol. Over-blending should be avoided for both.
• Texture and Feel: Pro Polymer can create a unique creamy, pudding-like texture at higher concentrations (above 3%). It may also leave a slightly sticky feeling initially on the skin which then dries to a thin film. Carbomer U20 primarily creates a standard gel texture.
• Usage Rate: The recommended usage rate for Carbomer U20 is typically 0.5-3%, while Pro Polymer can be used from 0.5-5%, with 0.8% suggested for general gel and higher amounts for increased viscosity, electrolyte tolerance, or the pudding texture.
• Electrolyte Tolerance Handling: While both tolerate electrolytes, Pro Polymer's description provides more specific guidance on increasing the usage rate and adding electrolyte-containing ingredients after the gel is formed if needed to maintain viscosity.

In summary, while chemically similar and both effective thickeners with electrolyte resistance, Carbomer U20 offers easier dispersion, whereas Pro Polymer provides the ability to create unique textures and has specific recommendations for handling electrolytes and optimizing hydration.