The Carbomer family of polymers offers a range of rheological modifiers, each with unique properties suited for different applications. Among these, Carbomer 940 is widely recognized for its exceptional thickening power, clarity, and performance in various formulations. However, understanding the subtle differences between Carbomer 940 and other grades, such as Carbomer 934, 974, or Carbomer copolymers, is essential for making informed decisions in product development. As a leading supplier of specialized chemical ingredients, we help formulators navigate these choices to find the perfect fit for their needs.

Understanding Carbomer Grades and Their Properties

Carbomers are synthetic polymers of acrylic acid, cross-linked to varying degrees. The specific cross-linking agent and the resulting polymer architecture dictate their performance characteristics, including viscosity, clarity, ion resistance, and shear sensitivity. While all Carbomers function as thickeners and gelling agents, their optimal applications differ:

  • Carbomer 940: Typically known for its high viscosity, excellent clarity, and good performance in neutral to alkaline pH ranges. It's a preferred choice for applications requiring clear gels and stable emulsions, such as cosmetic gels, lotions, and some pharmaceutical preparations. Its relatively low ion resistance means its viscosity can be affected by electrolytes.
  • Carbomer 934: Often considered a precursor or a close relative to Carbomer 940, it also offers significant thickening capabilities. Differences can be subtle, often relating to specific cross-linking density and rheological profiles.
  • Carbomer 974P: This grade is often specified for pharmaceutical applications and may offer improved properties like better resistance to specific ionic environments or pharmaceutical excipients. The 'P' designation often indicates suitability for pharmaceutical use.
  • Carbomer Copolymers (e.g., Carbomer 1342, Ultrez series): These are copolymers of acrylic acid with longer chain alkyl acrylates. They often exhibit enhanced properties such as better electrolyte tolerance, improved suspending capabilities for difficult-to-disperse ingredients, and sometimes better performance in slightly acidic conditions. They might offer improved texture or different gel structures.

When you decide to buy Carbomer 940, you are opting for a well-established grade known for its efficacy in many common cosmetic and personal care products. However, for highly specialized pharmaceutical applications or formulations with high electrolyte content, other grades might offer superior performance. Consulting with our technical team when you purchase Carbomer 940 can help identify the best grade for your unique formulation challenges.

Key Selection Criteria for Formulators

When selecting a Carbomer, consider the following:

  • Desired Viscosity: Different grades offer different viscosity profiles at standard use levels.
  • Clarity Requirements: For clear gels, grades like Carbomer 940 often excel.
  • pH Range of Formulation: Carbomers generally perform best in neutral to alkaline conditions.
  • Electrolyte/Ion Content: If your formulation contains significant amounts of salts or electrolytes, a copolymer grade might be more suitable to maintain viscosity.
  • Application Type: Pharmaceutical applications may require specific USP/NF grades, whereas cosmetic applications might prioritize feel and clarity.

Partnering for Success

Choosing the right Carbomer is crucial for achieving the desired product characteristics. As a knowledgeable supplier, we are equipped to guide you through the selection process. Whether your project calls for the proven performance of Carbomer 940 or the specialized properties of another grade, we can help you buy the right ingredient. Our commitment is to provide high-quality Carbomers and expert support to ensure your product innovation is successful. Contact us to discuss your formulation needs and to purchase the ideal Carbomer for your application.