Product Description
Poly(methacrylic acid) ammonium salt, also searched as
ammonium polymethacrylate, polymethacrylic acid ammonium salt,
and poly methacrylic acid ammonium salt, is a water-soluble, pH-responsive polymer supplied as a
30% aqueous solution in water. The polymer contains ionizable carboxylate functionality, present as the
ammonium salt, which can provide pH-dependent solubility, swelling, viscosity, and film behavior.
This aqueous ammonium salt polymer is useful in water-based formulations where tunable colloidal stability, adhesion,
dispersion control, or film performance is desired. It may be evaluated for controlled-release systems, coatings,
dispersions, and other formulation applications where anionic polycarboxylate functionality is beneficial.
Common Names & Related Terms
This product may be referred to by several related names, including
ammonium polymethacrylate, polymethacrylic acid ammonium salt,
poly(methacrylic acid) ammonium salt, poly methacrylic acid ammonium salt,
and ammonium salt of polymethacrylic acid.
It is chemically related to anionic polycarboxylate polymers such as ammonium polyacrylate and
polyacrylic acid ammonium salt, though formulation behavior depends on polymer structure, molecular
weight, concentration, pH, and ionic environment.
Key Benefits
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Water-soluble polymer provided as a convenient 30% aqueous solution
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pH-responsive behavior via ionizable carboxyl functionality
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Anionic polycarboxylate functionality for aqueous formulation systems
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Film-forming potential for coatings and surface modification, formulation dependent
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Dispersing & stabilization aid to enhance colloidal stability in aqueous systems
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Versatile formulation utility for controlled-release and dispersion applications
Typical Applications
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Pharmaceuticals & Drug Delivery: Used in enteric and pH-controlled release coatings where solubility,
swelling, or film behavior changes with pH, application dependent.
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Cosmetics & Personal Care: Functions as a film-former, thickening aid, or stabilizer in water-based
skincare and cosmetic formulations.
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Industrial Dispersions: Supports colloidal stability, particulate dispersion, and formulation consistency
in aqueous systems.
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Coatings & Surface Modification: May be evaluated in water-based coating systems where pH response,
adhesion, or film properties are important.
Usage Notes
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pH Effects: Polymer behavior may change with pH, including viscosity, solubility, swelling, and film
properties. Adjust pH and ionic strength to tune performance.
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Addition: Typically added under agitation; pre-dilution with water may help with incorporation depending
on formulation viscosity and processing conditions.
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Compatibility: As an anionic polymer, performance and compatibility can be affected by high electrolyte
levels and strongly cationic ingredients; evaluate in the intended system.
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Optimization: Use level and performance are formulation-dependent; bench testing is recommended for best
results.
Handling & Storage
- Store tightly closed in a cool, dry area and protect from contamination.
- Avoid freezing and excessive heat; mix thoroughly before use if settling is observed.
- Follow standard laboratory/industrial hygiene practices and consult the SDS for safe handling guidance.
FAQs
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What is Poly(methacrylic acid) ammonium salt?
It is the ammonium salt form of poly(methacrylic acid), supplied as a 30% aqueous solution in water. The polymer
contains ionizable carboxyl functionality that can provide pH-dependent behavior in aqueous formulations.
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Is Poly(methacrylic acid) ammonium salt the same as ammonium polymethacrylate?
The terms are closely related and may be used to describe the ammonium salt form of polymethacrylic acid.
Product selection should be based on the specific product grade, concentration, specifications, and intended use.
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Is this product related to ammonium polyacrylate?
It is related in that both are anionic polycarboxylate ammonium salt polymers used in aqueous systems. However,
poly(methacrylic acid) ammonium salt and ammonium polyacrylate are not always interchangeable; performance depends
on polymer structure, molecular weight, concentration, pH, and formulation conditions.
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Why is this polymer described as pH-responsive?
The carboxyl groups can change ionization state with pH, which may alter solubility, swelling, viscosity, and film
behavior. The extent of the response depends on formulation conditions and ionic environment.
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How is the 30% aqueous solution typically used in formulations?
It is commonly added under mixing directly or after pre-dilution with water. Final performance depends on pH, salts,
solids content, and other ingredients, so small-scale trials are recommended to set the appropriate use level.
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What should I consider for compatibility?
As an anionic polymer, it may be less compatible with strongly cationic ingredients and can be sensitive to high
electrolyte levels. Evaluate stability and performance in the intended formulation conditions.
