Pemulen™ Polymeric Emulsifiers

Pemulen™ polymeric emulsifiers are high molecular weight, copolymers of acrylic acid and C10-C30 alkyl acrylate crosslinked with allyl pentaerythritol. They are offered as fluffy, white powders and are primarily used to form stable oil-in-water emulsions. Pemulen polymers contain both hydrophilic and hydrophobic portions within the molecule. The hydrophobic portion of the polymer adsorbs at the oil-water interface, and the hydrophilic portion swells in the water forming a gel network around the oil droplets to provide exceptional emulsion stability.

Product Advantages

Pemulen polymers form stable oil-in-water emulsions without the need for any additional surfactants. Therefore, they are ideal for developing low irritancy lotions and creams with elegant skin feel. Pemulen polymers provide viscosity building and high yield value to allow for suspension and stabilization of insoluble materials and particulates.

Product Overview

Pemulen
Polymer
Solvent
System
Product
Type
Viscosity, cP
(1.0 wt% at pH 7.5)1
Suggested Uses
TR-1 NF Cosolvent1 Copolymer 10,000 - 26,500 Low irritancy emulsions (lotions and creams) and high clarity gels
TR-2 NF Cosolvent1 Copolymer 4,500 - 13,500 Low irritancy emulsions (lotions and creams), high clarity gels and ionic systems

1Colsolvent system made using cyclohexane and ethyl acetate

Typical Product Properties

Typical Properties Pemulen™ TR-1 NF Polymer Pemulen™ TR-2 NF Polymer
Emulsion Stabilization Yes Yes
Oil Loading1 Up to 30% Up to 65 - 80%
Relative Viscosity Medium Low
Yield Value High High
Effective pH Range2 4 - 9 4 - 9
Typical Use Concentration3 0.15 - 0.3% 0.15 - 0.3%

1 With no secondary emulsifiers
2 Higher oil levels typically require lower pH
3 Higher levels may be needed in formulations with high electrolyte content