Polyacrylic Acid is a synthetic acrylic polymer used in selected cosmetic and personal-care formulations as a rheology modifier, thickening agent, stabilizer, suspending agent and texture-enhancing polymer. Its polymeric structure contains carboxylic acid groups that can interact with water and influence the viscosity, flow behavior and physical structure of formulated products.
Polyacrylic Acid is available in different molecular-weight grades and polymer forms. Because polymer characteristics can vary significantly between grades, the exact viscosity, molecular weight, concentration, neutralization level and other technical properties should be established according to the selected commercial grade.
In cosmetic formulation, Polyacrylic Acid can be used to modify the rheological properties of aqueous systems. When appropriately neutralized, the polymer chains can expand and produce a significant increase in viscosity. This makes suitable grades useful for developing gels, structured liquids, creams, lotions and other formulations where controlled viscosity and texture are required.
The polymer can also contribute to suspension and stabilization by modifying the continuous phase and helping maintain dispersed materials within a formulation. Its performance depends on polymer concentration, molecular weight, pH, neutralization, electrolytes and interactions with other ingredients.
Potential applications include:
Polyacrylic Acid should be selected according to the desired viscosity, rheological profile, pH range, electrolyte tolerance and compatibility requirements of the finished formulation.
Polyacrylic Acid is a synthetic polymer produced from acrylic acid monomers.
Its polymer backbone contains repeating acrylic-acid-derived units with carboxylic acid functional groups. These groups provide the polymer with its characteristic acidic and water-interacting properties.
A simplified representation is:
[-CH₂-CH(COOH)-]ₙ
The actual molecular weight and polymer-chain characteristics depend on the grade and manufacturing process.
| Parameter | Details |
|---|---|
| Product Name | Polyacrylic Acid |
| INCI Name | Polyacrylic Acid |
| Chemical Class | Acrylic Polymer |
| Polymer Type | Synthetic Polymer |
| Primary Functions | Rheology Modifier, Thickener |
| Additional Functions | Stabilizer, Suspending Agent, Texture Modifier |
| Category | Cosmetic Ingredient |
| Physical Form | Grade-dependent |
| Appearance | Grade-dependent |
| Color | Grade-dependent |
| Water Interaction | High / Grade-dependent |
| Molecular Formula | (C₃H₄O₂)ₙ |
| Molecular Weight | Polymer / Grade-dependent |
| CAS Number | 9003-01-4 |
Polyacrylic Acid is a polymer of acrylic acid.
Its properties are influenced by:
These characteristics determine the polymer's viscosity-building ability, water interaction, rheology and formulation compatibility.
A simplified repeating unit of Polyacrylic Acid is:
[-CH₂-CH(COOH)-]ₙ
The COOH group represents the carboxylic acid functionality.
When the polymer is neutralized, some or all of these acid groups can be converted into carboxylate salts. This changes polymer-chain expansion and can significantly influence viscosity and rheological behavior.
Polyacrylic Acid can function as a rheology modifier in suitable cosmetic systems.
It can help control:
Higher molecular-weight grades can generally provide stronger viscosity-building effects under suitable formulation conditions.
Polyacrylic Acid can provide significant thickening after appropriate neutralization in suitable systems.
Neutralization can cause the polymer chains to expand because of electrostatic repulsion between charged carboxylate groups. This expansion increases the hydrodynamic volume of the polymer and can produce a substantial increase in viscosity.
Suitable grades may therefore be used in:
Neutralization is an important consideration when using Polyacrylic Acid in formulations.
Suitable neutralizing agents can convert carboxylic acid groups into their corresponding carboxylate forms.
Neutralization can influence:
The appropriate neutralization level depends on the specific polymer grade and finished formulation.
Polyacrylic Acid can contribute to physical formulation stability by modifying rheology and the behavior of dispersed materials.
Potential functions include:
It should be considered as part of the complete stabilization system.
Selected grades can support suspension of dispersed materials by increasing the viscosity and modifying the rheological properties of the continuous phase.
Potentially suspended materials can include:
Suspension performance depends on particle size, density, polymer concentration, viscosity and formulation composition.
Polyacrylic Acid can influence the texture and application properties of cosmetic products.
It may contribute to:
The final sensory profile depends on the polymer grade and complete formulation.
Polyacrylic Acid can be considered for selected skin-care formulations.
Potential applications include:
Potential functions include rheology modification, thickening, suspension and formulation stabilization.
Appropriately selected and neutralized grades can be used to create structured cosmetic gels.
Potential applications include:
The final viscosity depends on molecular weight, concentration, neutralization and other formulation parameters.
Polyacrylic Acid can contribute to the viscosity and structural characteristics of creams and lotions.
Potential benefits include:
Compatibility with emulsifiers, electrolytes and active ingredients should be evaluated.
Selected grades can be incorporated into serum formulations to provide controlled viscosity and texture.
Potential functions include:
The polymer level should be optimized according to the desired serum characteristics.
Selected grades may be evaluated in cleansing formulations such as:
Compatibility with surfactants and electrolytes is an important consideration.
Polyacrylic Acid can be used in selected hair-care formulations where viscosity and formulation structure are required.
Potential applications include:
The suitability of a specific grade depends on its rheological and compatibility characteristics.
Important formulation factors include:
Because Polyacrylic Acid is an acidic polymer, its rheological performance can change substantially with neutralization and ionic strength.
pH has a significant influence on Polyacrylic Acid.
Changes in pH can affect:
For formulations requiring maximum viscosity development, the appropriate neutralization and pH conditions should be established during formulation development.
Electrolytes can influence the viscosity and polymer-chain behavior of Polyacrylic Acid.
Potentially relevant ingredients include:
High electrolyte levels may reduce or modify the viscosity contribution of some acrylic polymers. Compatibility testing is recommended.
Polyacrylic Acid can interact differently with various surfactant systems.
Evaluation may be required with:
The effects on viscosity, clarity, stability and product texture should be evaluated in the complete formulation.
A general development process may include:
The exact manufacturing procedure should follow the technical instructions for the selected grade.
Possible causes include:
Possible causes include:
Potential causes include:
Depending on the selected grade, quality-control testing can include:
Exact acceptance criteria should be based on the approved specification and Certificate of Analysis for the particular grade.
General storage recommendations include:
Polyacrylic Acid is a versatile synthetic acrylic polymer used in selected cosmetic and personal-care formulations for rheology modification, thickening, suspension, stabilization and texture control.
When sourcing Polyacrylic Acid, buyers should evaluate:
When sourcing Polyacrylic Acid for cosmetic formulation, important factors include:
For bulk procurement, buyers should specify:
Polyacrylic Acid is a synthetic acrylic polymer used in suitable cosmetic formulations as a rheology modifier, thickener, stabilizer and suspending agent.
The INCI name is Polyacrylic Acid.
The commonly associated CAS number is 9003-01-4.
A simplified polymer formula is (C₃H₄O₂)ₙ.
It can be used for rheology modification, thickening, suspension, stabilization and texture enhancement.
Yes. Suitable grades can provide significant viscosity enhancement, particularly after appropriate neutralization.
Many cosmetic applications use neutralization to develop the polymer's viscosity, although the exact requirement depends on the polymer grade and formulation.
Yes. Suitable grades can be used in creams and lotions for viscosity, texture and stabilization.
Yes. Appropriately selected and neutralized grades can be used to develop cosmetic gel structures.
Yes. Selected grades can be used for viscosity and texture modification in serum formulations.
Yes. Suitable grades can be evaluated in selected hair-care and styling formulations.
Important factors include molecular weight, polymer concentration, neutralization level, pH, electrolytes, surfactants and other formulation ingredients.
| Parameter | Specification |
|---|---|
| Appearance | Creamy white to pale yellow |