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Models and Characteristics of Carbopol Models and Characteristics of Carbopol

Carbopol is a white loose powder; it has a characteristic slightly odor; it has hygroscopicity and is a medicinal excipient. Carbopol is a high molecular polymer of acrylic acid bonded allyl sucrose or pentaerythritol allyl ether. Calculated according to the dry product, the carboxylic acid group (-COOH) should be 56.0%-68.0%.


Carbopol discolors with resorcinol and is incompatible with phenol, cationic polymers, strong acids and high concentrations of electrolytes.


Commonly used Carbopol has the following 11 different models:


1. Carbopol 940;


2. Carbopol 941;


3. Carbopol 934;


4. Carbopol 1342;


5. Carbopol 980;


6. Carbopol ETD 2020;


7. Carbopol AQUA SF-1;


8. carbopol Ultrez 21;


9. Carbopol Ultrez 20;


10. Pemulen TR-1;


11. Pemulen TR-2;


Different models are mainly different in viscosity. The following are the characteristics of commonly used models:


Carbopol940: short rheology, high viscosity, high clarity, low ion resistance and shear resistance, suitable for gels and creams.


Carbopol941: long rheology, low viscosity, high clarity, medium ion resistance and shear resistance, suitable for gels and emulsions.


Carbopol934: cross-linked polyacrylic resin, topical drug delivery system, stable at high viscosity, used in thick gels, emulsions, and suspensions.

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