Sodium Polyacrylate is a synthetic water-soluble polymer used in cosmetic and personal-care formulations primarily as a rheology modifier, thickener, stabilizer, film-forming agent and texture-enhancing polymer. It is the sodium salt of polyacrylic acid and is valued for its ability to interact with water and contribute to the consistency and physical stability of formulated products.
Sodium Polyacrylate can absorb and retain significant amounts of water depending on its molecular structure, degree of neutralization, cross-linking and grade. These characteristics make it useful in formulations where viscosity control, water management, suspension and product texture are important.
In cosmetic applications, Sodium Polyacrylate may be supplied in different grades and physical forms. The exact performance depends on molecular weight, polymer architecture, concentration and the overall formulation system. It can be incorporated into selected creams, lotions, gels, serums, masks and other personal-care formulations.
As a rheology modifier, Sodium Polyacrylate can help increase viscosity and provide a desired product consistency. It can also contribute to suspension and stabilization by increasing the continuous-phase viscosity and modifying the flow behavior of the formulation.
Sodium Polyacrylate can contribute to the sensory characteristics of cosmetic products by helping produce smooth, structured and spreadable textures. Depending on the grade and concentration, it may provide different levels of thickening, film formation and water interaction.
Potential applications include:
The exact recommended use level and processing method should be established according to the selected cosmetic grade and its technical specification.
Sodium Polyacrylate is a synthetic polymer derived from acrylic acid and present in its sodium salt form.
It contains repeating acrylate units with sodium-associated carboxylate groups. These ionic groups provide strong interaction with water and are responsible for many of the polymer's water-absorbing and rheological characteristics.
A simplified representation is:
[-CH₂-CH(COONa)-]ₙ
The actual polymer can vary in molecular weight, chain architecture and degree of neutralization.
| Parameter | Details |
|---|---|
| Product Name | Sodium Polyacrylate |
| INCI Name | Sodium Polyacrylate |
| Chemical Class | Acrylic Polymer |
| Polymer Type | Synthetic Anionic Polymer |
| Primary Functions | Rheology Modifier, Thickener |
| Additional Functions | Stabilizer, Film Former, Texture Modifier |
| Category | Cosmetic Ingredient |
| Physical Form | Grade-dependent |
| Appearance | Grade-dependent |
| Color | Grade-dependent |
| Water Interaction | High |
| Molecular Formula | (C₃H₃NaO₂)ₙ |
| Molecular Weight | Polymer / Grade-dependent |
| CAS Number | 9003-04-7 |
Sodium Polyacrylate is the sodium salt form of polyacrylic acid.
Its polymer backbone contains carbon-carbon repeating units with sodium carboxylate functionality. The ionic character of the polymer allows it to interact strongly with water.
Important characteristics can vary according to:
These variables influence viscosity, water absorption, swelling, film formation and formulation compatibility.
A simplified repeating unit of Sodium Polyacrylate can be represented as:
[-CH₂-CH(COONa)-]ₙ
where n represents the number of repeating units in the polymer chain.
The molecular weight is therefore not represented by one fixed molecular-weight value because Sodium Polyacrylate is a polymer.
Sodium Polyacrylate is used in cosmetic formulations as a rheology modifier.
It can increase the viscosity of suitable aqueous systems and help control:
The final rheological behavior depends on polymer concentration, molecular weight, pH, electrolytes and other formulation components.
Sodium Polyacrylate can act as a thickening polymer in suitable cosmetic systems.
It can help develop:
The level of thickening depends on the specific grade and formulation environment.
The sodium carboxylate groups in Sodium Polyacrylate provide strong interaction with water.
Depending on the polymer architecture and grade, this can contribute to:
Cross-linked grades can exhibit substantially different water-absorption behavior compared with soluble linear grades.
Sodium Polyacrylate can contribute to the physical stability of cosmetic formulations.
It may support:
Its stabilization performance depends on the complete formulation.
Selected Sodium Polyacrylate grades can contribute to film formation.
Film-forming properties may help influence:
Film properties depend on polymer molecular characteristics and formulation composition.
Sodium Polyacrylate can help produce a smooth and structured texture in cosmetic formulations.
It can influence:
The final sensory profile should be evaluated in the finished product.
Sodium Polyacrylate can be incorporated into selected skin-care formulations.
Potential applications include:
It can contribute to viscosity, texture, suspension and physical stability.
In suitable formulations, Sodium Polyacrylate can help develop structured gel systems.
Potential applications include:
The required concentration depends on the polymer grade and desired viscosity.
Sodium Polyacrylate can be used in creams and lotions as a rheology modifier and stabilizing polymer.
Potential contributions include:
Compatibility with emulsifiers, electrolytes and other ingredients should be evaluated.
Selected grades can be used in serum formulations where viscosity and texture modification are required.
It can help provide:
The polymer concentration should be optimized according to the desired serum texture.
Selected grades can be incorporated into sunscreen formulations for rheology modification and formulation structure.
Potential functions include:
Compatibility with UV filters and other sunscreen ingredients should be evaluated during formulation development.
Sodium Polyacrylate can be used in selected hair-care formulations.
Potential applications include:
Potential functions include viscosity control, texture modification, film formation and formulation stabilization.
Important factors when formulating with Sodium Polyacrylate include:
Because Sodium Polyacrylate is an ionic polymer, salts and other electrolytes can significantly influence its viscosity and swelling behavior.
The formulation pH can influence the behavior of Sodium Polyacrylate.
Changes in pH can affect:
The suitable pH range should be established according to the specific grade and finished formulation.
Electrolytes can reduce or modify the rheological performance of ionic polymers such as Sodium Polyacrylate.
Relevant ingredients can include:
When a formulation contains significant electrolyte levels, compatibility testing is recommended.
Compatibility with surfactants depends on the formulation and polymer grade.
Evaluation may be required with:
Changes in viscosity, clarity, stability and deposition should be evaluated during formulation development.
A general formulation-development approach may include:
The exact manufacturing process should follow the technical specification of the selected grade.
Possible causes include:
Possible causes include:
Potential causes include:
Depending on the selected grade, quality-control parameters can include:
Exact acceptance limits should be based on the approved specification and Certificate of Analysis for the commercial grade.
General storage considerations include:
Sodium Polyacrylate is a versatile synthetic polymer used in cosmetic and personal-care formulations for thickening, rheology modification, stabilization, suspension, water interaction and texture enhancement.
When sourcing Sodium Polyacrylate, buyers should consider:
When selecting a Sodium Polyacrylate supplier, important considerations include:
For bulk procurement, buyers should specify:
Sodium Polyacrylate is a synthetic acrylic polymer and sodium salt of polyacrylic acid used in suitable cosmetic formulations as a rheology modifier, thickener, stabilizer and texture-enhancing polymer.
The INCI name is Sodium Polyacrylate.
The commonly used CAS number is 9003-04-7.
A simplified polymer formula is (C₃H₃NaO₂)ₙ.
It can be used for thickening, rheology modification, stabilization, suspension, film formation and texture enhancement.
Yes. Suitable grades can function as cosmetic thickeners and rheology modifiers.
Water interaction depends on the polymer structure and grade. Linear grades can be water-soluble, while cross-linked grades may primarily swell and absorb water.
Yes. Suitable grades can be used in creams and lotions for rheology modification, texture and stabilization.
Yes. Selected grades can contribute to structured gel formulations.
Yes. Suitable grades can be used to modify viscosity and texture in serum formulations.
Selected grades can be incorporated into sunscreen formulations for rheology modification, suspension and formulation structure.
Yes. Suitable grades can be used in selected hair-care and styling formulations.
Important factors include molecular weight, concentration, pH, electrolytes, surfactants, water quality, processing conditions and the complete formulation composition.
| Parameter | Specification |
|---|---|
| Appearance | Creamy white to pale yellow |