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Neutral methacrylate copolymer is a colorless, water-insoluble plastic composed of ethyl acrylate and methyl methacrylate.
Neutral methacrylate copolymer is widely used in the pharmaceutical and food supplement industries as a glazing and coating agent to create sustained-release ("retard") formulations that control the release of active ingredients.
Neutral methacrylate copolymer is a synthetic polymer made from methacrylate ester monomers (and sometimes small amounts of other methacrylate derivatives) that does not contain ionizable (acidic or basic) groups in its main structure.
CAS Number: 9010-88-2
Molecular Formula: C10H16O4
Molecular Weight: 200.23
EINECS Number: 618-459-6
Synonyms: POLYBEAD(R) PMMA MICROSPHERES;POLYBEAD(R) POLY(METHYL METHACRYLATE) MICROSPHERES;POLY(METHYL METHACRYLATE) 10'000;Methylmethacrylate, ethylacrylatecopolymer;Methylmethacrylate, polymerwithethylacrylate, METHYL METHACRYLATE, POLYMERIZED, METHYL METHACRYLATE RESIN, METHACRYLIC ACID METHYL ESTER POLYMER
Neutral methacrylate copolymer is chemically non-ionic (“neutral”) and does not significantly change its solubility with pH.
Neutral methacrylate copolymer is widely used in pharmaceutical coatings, film formation, controlled-release systems, and material protection layers.
This improves stable performance across different environments.
Neutral methacrylate copolymeris a copolymer of neutral methacrylate esters, where properties are controlled mainly by the type and ratio of ester side chains rather than pH-dependent ionization.
This gives it predictable, non-pH-responsive behavior.
Neutral methacrylate copolymer improves formulation consistency.
Neutral methacrylate copolymer is typically a white to off-white powder or dispersion-form polymer that forms flexible, water-insoluble or slightly permeable films.
These films can act as protective barriers or controlled diffusion layers.
Neutral methacrylate copolymer improves coating functionality.
Neutral methacrylate copolymer acts as a film-forming agent, coating polymer, matrix former, stabilizer, and permeability control agent.
Unlike anionic methacrylate copolymers, it does not dissolve sharply at a specific pH but instead controls release through diffusion.
Neutral methacrylate copolymer improves steady and predictable release behavior.
Neutral methacrylate copolymer is best described as a non-ionizable synthetic coating polymer used to form stable films and control drug release mainly through diffusion rather than pH-triggered dissolution.
Colorless transparent glassy, refractive index 1.5, light transmittance 94%, relative density 1.18-1.19, hardness 25-28, modulus of elasticity 3.16×109Pa, volume modulus of elasticity 2.9×109Pa, ultimate tensile strength 46.2-70.3MPa.
Neutral methacrylate copolymer acrylic acid is H2C=CH-COOH and methacrylic acid is H2C=C(CH3)COOH.
Neutral methacrylate copolymer and their methyl esters are both quite reactive and difficult to store and handle.
The monomer used to form poly(methyl methacrylate), 2-hydroxy-2-methylpropanenitrile, is prepared by the following reaction.
Neutral methacrylate copolymer is then reacted with methanol (or other alcohol) to yield methacrylate ester.
Free-radical polymerization is initiated by peroxide or azo catalysts and produce poly(methyl methacrylate) resins having the following formula:
Neutral methacrylate copolymers are widely used because they provide consistent barrier properties that are independent of environmental pH.
This makes them especially useful in formulations that must behave the same throughout the gastrointestinal tract.
Neutral methacrylate copolymer improves reliability across conditions.
In pharmaceutical controlled-release systems, they are often used to slow down drug release by forming a semi-permeable film around tablets or pellets.
Water slowly penetrates the film, dissolving or diffusing the active ingredient outward.
Neutral methacrylate copolymer improves sustained-release performance.
In film coating technology, neutral methacrylate copolymers form smooth, flexible, and continuous coatings that protect drugs from moisture, oxygen, and mechanical stress.
These coatings are often used as protective outer layers.
Neutral methacrylate copolymer improves product stability and shelf life.
In matrix tablets, they can be incorporated into the solid dosage form itself, where they control how quickly fluids enter and dissolve the drug.
This allows gradual drug release over time.
Neutral methacrylate copolymer improves dosing consistency.
In taste-masking systems, they are used to create a barrier that prevents immediate dissolution of bitter drugs in the mouth.
Since they are not pH-triggered, they rely on slow diffusion instead.
Neutral methacrylate copolymer improves patient acceptability.
In pellet coating applications, they are applied as thin layers around small drug cores to achieve uniform sustained release profiles.
Neutral methacrylate copolymer helps combine multiple release behaviors in one formulation.
This improves dosing flexibility.
In moisture protection, neutral methacrylate films act as hydrophobic barriers that reduce water absorption into sensitive formulations.
This is especially important for hygroscopic drugs.
Neutral methacrylate copolymer improves storage stability.
In combination coating systems, they are often blended with plasticizers to adjust film flexibility and prevent cracking during handling.
Neutral methacrylate copolymer improves mechanical durability.
In industrial pharmaceutical processes, they are compatible with large-scale coating techniques such as fluid-bed coating and pan coating.
This allows reproducible production of uniform dosage forms.
Neutral methacrylate copolymer improves manufacturing scalability.
In research and development, they are used as model polymers to study diffusion-controlled release mechanisms independent of pH effects.
Neutral methacrylate copolymer helps isolate physical transport processes from chemical triggers.
Neutral methacrylate copolymer improves scientific understanding of drug delivery.
Melting point: 150 °C
Density: 1.2 g/mL at 25 °C (lit.)
refractive index: n20/D 1.49
solubility: alcohols and aliphatic hydrocarbons: insoluble
form: powder
InChI: 1S/2C5H8O2/c1-4(2)5(6)7-3;1-3-5(6)7-4-2/h1H2,2-3H3;3H,1,4H2,2H3
InChIKey: XPNLOZNCOBKRNJ-UHFFFAOYSA-N
SMILES: C(=O)(OC)C(=C)C.C(=O)(C=C)OCC
Neutral methacrylate copolymer is especially important in formulation science because it provides purely physical control over drug release, meaning its behavior is governed by diffusion and film permeability rather than chemical triggers like pH.
This makes it highly predictable across different physiological environments.
Neutral methacrylate copolymer improves reproducibility in drug delivery systems.
Its performance is mainly determined by the hydrophobicity of its ester side chains.
Longer or more hydrophobic alkyl groups reduce water penetration and slow drug release, while more polar structures allow faster diffusion.
Neutral methacrylate copolymer improves tunability of release rates.
In diffusion-controlled coatings, the polymer acts as a semi-permeable membrane.
Water enters the film slowly, dissolves or suspends the drug, and then the drug diffuses outward at a controlled rate.
Neutral methacrylate copolymer improves sustained-release behavior.
In multi-particulate systems, neutral methacrylate copolymers are especially useful because they provide uniform coating thickness and consistent release across thousands of pellets.
This reduces variability between dosage units.
Neutral methacrylate copolymer improves dose uniformity.
In osmotic and modified-release hybrids, they can be combined with osmotic agents or swelling polymers to fine-tune internal pressure and diffusion pathways.
Neutral methacrylate copolymer allows complex release profiles such as zero-order or near-constant release.
This improves pharmacokinetic control.
In moisture barrier engineering, these polymers are often selected for their ability to reduce water vapor transmission while still allowing controlled drug diffusion.
This is critical for moisture-sensitive APIs.
Neutral methacrylate copolymer improves stability under humid conditions.
In taste-masking systems, neutral methacrylate coatings are effective because they delay dissolution in saliva without relying on pH changes.
Drug release only begins once the dosage reaches the stomach or intestine.
Neutral methacrylate copolymer improves patient acceptability.
In film mechanics, Neutral methacrylate copolymer often require plasticizers to avoid brittleness, especially in thick coatings.
Plasticizers improve flexibility and prevent cracking during compression or handling.
Neutral methacrylate copolymer improves coating durability.
In coating process engineering, they are widely used in fluidized-bed coating systems because they form uniform layers even on irregular pellet surfaces.
Neutral methacrylate copolymer ensures consistent drug release across large batches.
Neutral methacrylate copolymer improves industrial scalability.
In combination polymer systems, neutral methacrylates are often blended with hydrophilic polymers (like PVP or HPMC) to create hybrid release profiles combining diffusion and swelling mechanisms.
This allows highly customized drug release behavior.
Neutral methacrylate copolymer improves formulation flexibility.
In advanced drug delivery research, they are used as model systems to study purely diffusion-driven release kinetics without interference from ionization effects.
Neutral methacrylate copolymer helps isolate physical transport phenomena in pharmaceutical design.
This improves scientific modeling accuracy.
Neutral methacrylate copolymer, the polymerizedmethyl ester of methacrylic acid, is thermoplastic.
The method of polymerization may be variedto achieve specific physical properties, orthe monomer may be combined with other components.Sheet materials may be prepared bycasting the monomer in bulk.
Suspension polymerizationof the monomeric ester may be usedto prepare molding powders.
Neutral methacrylate copolymer is a clear solid, hardbut easily scratched.
Its dielectric properties areonly moderate, and its use is restricted to undemandingconditions at normal ambient temperatures,usually in a molded form, where appearanceis important.
Neutral methacrylate copolymer is particularly valued because it provides time-controlled drug release without relying on chemical triggers, meaning its performance is governed almost entirely by physical diffusion and film structure.
This makes it easier to predict behavior in different patients and conditions.
Neutral methacrylate copolymer improves reliability in real-world pharmacokinetics.
At the molecular level, its properties depend on polymer chain density, glass transition temperature (Tg), and hydrophobic ester composition.
These parameters determine how tightly the film packs and how easily water can penetrate it.
Neutral methacrylate copolymer improves fine control over release kinetics.
In rate-controlling membrane systems, the polymer forms a continuous barrier that regulates how quickly gastrointestinal fluids penetrate the dosage form.
Drug release occurs as a function of water diffusion and drug solubility inside the matrix.
Neutral methacrylate copolymer improves sustained and predictable release profiles.
In multi-layer coating design, neutral methacrylate copolymers are often used as middle layers between active drug cores and outer protective coatings.
Neutral methacrylate copolymer improves adhesion between layers and prevents coating delamination.
This improves structural integrity of dosage forms.
In high-load drug formulations, it helps maintain uniform release even when large amounts of active ingredient are incorporated into a single system.
Neutral methacrylate copolymer prevents dose dumping or uneven release patterns.
Neutral methacrylate copolymer improves safety and dosing accuracy.
In pellet coating uniformity studies, it is used because it forms consistent films even on irregular particle surfaces, reducing variability between individual pellets.
Neutral methacrylate copolymer is essential for multiparticulate oral delivery systems.
This improves batch-to-batch consistency.
In coating stress resistance, plasticizer compatibility plays a major role; without it, methacrylate films can become brittle and crack under mechanical stress.
Proper formulation prevents coating failure during compression or transport.
Neutral methacrylate copolymer improves durability under manufacturing and physiological stress.
In combination with hydrophilic polymers, neutral methacrylate systems can be tuned to create hybrid release mechanisms combining diffusion (methacrylate) and swelling (e.g., HPMC).
Neutral methacrylate copolymer allows near-linear or multi-phase drug release profiles.
This improves advanced release engineering.
In environmental barrier applications within pharmaceuticals, it also reduces oxygen and moisture permeability to protect sensitive compounds from degradation.
This is especially important for oxidation-sensitive drugs.
Neutral methacrylate copolymer improves chemical stability of formulations.
In advanced formulation prototyping, it is frequently used as a baseline polymer to compare against pH-sensitive or swelling polymers in controlled-release design experiments.
Neutral methacrylate copolymer helps isolate the role of diffusion versus chemical triggers.
Neutral methacrylate copolymer improves formulation research clarity.
Uses:
Neutral methacrylate copolymer may be used to prepare single phase mixture with phenolic derivative.
Neutral methacrylate copolymer may be used to form latex interpenetrating polymer networks (LIPNs).
Neutral methacrylate copolymer were reportedly used for separation of heavy metal ions from aqueous solutions.
Neutral methacrylate copolymer is mainly used as a film-forming agent, controlled-release coating polymer, barrier material, and matrix former because it regulates drug release through diffusion rather than pH sensitivity.
In controlled-release tablets and capsules, it is used to slow down and regulate drug release over time.
This improves dosing stability and therapeutic control.
In film coating applications, it is used to form protective, flexible coatings around dosage forms.
Neutral methacrylate copolymer improves stability and shelf life.
In pellet and granule systems, it is used to create uniform sustained-release layers.
Neutral methacrylate copolymer improves flexibility in formulation design.
In taste-masking coatings, it is used to prevent immediate drug dissolution in the mouth.
Neutral methacrylate copolymer improves patient compliance.
In moisture-protective coatings, it is used to reduce water penetration into sensitive formulations.
Neutral methacrylate copolymer improves storage stability.
In matrix systems, it is used to control fluid penetration and drug diffusion within solid dosage forms.
Neutral methacrylate copolymer is mainly used as a controlled-release coating polymer, film-forming agent, diffusion barrier, and matrix former because it regulates drug release through permeability rather than pH response.
In sustained-release tablets and capsules, it is used to slow and control drug release over time.
This improves dosing consistency and therapeutic duration.
In pellet and multiparticulate coatings, it is used to create uniform diffusion-controlled layers.
Neutral methacrylate copolymer improves flexibility and dose precision.
In film coating systems, it is used to protect active ingredients and control permeability.
Neutral methacrylate copolymer improves stability and product performance.
In taste-masking applications, it is used to delay drug dissolution in the mouth.
Neutral methacrylate copolymer improves patient compliance.
In moisture-protective coatings, it is used to reduce water penetration into sensitive formulations.
Neutral methacrylate copolymer improves shelf-life stability.
In matrix-based drug delivery systems, it is used to control how fluids penetrate and how drugs diffuse out.
Neutral methacrylate copolymer improves release predictability.
Neutral methacrylate copolymer is mainly used as a diffusion-controlled release polymer, film-forming agent, coating material, and matrix former because it regulates drug release through permeability rather than chemical responsiveness.
In sustained-release oral dosage forms, it is used to maintain steady drug release over extended periods.
Neutral methacrylate copolymer improves therapeutic consistency and reduces dosing frequency.
In pellet and multiparticulate systems, it is used to create uniform coating layers for controlled diffusion.
Neutral methacrylate copolymer improves dose uniformity and flexibility.
In tablet coating systems, it is used to protect active ingredients and regulate release rate.
Neutral methacrylate copolymer improves stability and performance.
In taste-masking applications, it is used to prevent immediate dissolution in saliva.
Neutral methacrylate copolymer improves patient acceptability.
In moisture-protective coatings, it is used to reduce water penetration into sensitive formulations.
Neutral methacrylate copolymer improves shelf-life stability.
In matrix drug delivery systems, it is used to control fluid ingress and drug diffusion pathways.
Neutral methacrylate copolymer improves release predictability.
Neutral methacrylate copolymer is mainly used as a controlled-release coating polymer, diffusion barrier, film-forming agent, and matrix former because it regulates drug release through physical permeability rather than pH-dependent behavior.
In sustained-release tablets and capsules, it is used to slow the release of active ingredients over time.
Neutral methacrylate copolymer improves dosing interval and therapeutic consistency.
In pellet and multiparticulate systems, it is used to coat small particles with uniform diffusion-controlling films.
Neutral methacrylate copolymer improves dose flexibility and reduces variability between units.
In film coating applications, it is used to form smooth, protective layers around pharmaceutical dosage forms.
Neutral methacrylate copolymer improves stability, appearance, and mechanical protection.
In taste-masking systems, it is used to prevent immediate drug dissolution in saliva.
Neutral methacrylate copolymer improves patient compliance and acceptability.
In moisture-protective coatings, it is used to reduce water penetration into sensitive formulations.
Neutral methacrylate copolymer improves shelf-life stability and product integrity.
In matrix-based drug delivery systems, it is used to control how fluids enter and how drugs diffuse out of solid dosage forms.
Neutral methacrylate copolymer improves release predictability and control.
In combination coating systems, it is blended with plasticizers or hydrophilic polymers to adjust permeability and flexibility.
Neutral methacrylate copolymer improves coating durability and fine-tuning of release profiles.
In industrial pharmaceutical manufacturing, it is used in fluid-bed coating, pan coating, and spray-coating processes for large-scale production.
Neutral methacrylate copolymer improves scalability and batch consistency.
In advanced formulation design, it is used as a model diffusion-control polymer in research on sustained and modified drug release systems.
This improves innovation in drug delivery technology.
Safety Profile
Inhalation of fine particles may lead to mild, reversible respiratory irritation, especially in poorly ventilated environments.
Neutral methacrylate copolymer improves workplace exposure control.
Eye contact with powder may cause mechanical irritation, but it is not chemically corrosive or reactive.
Neutral methacrylate copolymer improves basic handling safety.
Skin contact is generally low risk, and the polymer is widely used in pharmaceutical coatings with good tolerability.
This improves user safety confidence.
From a toxicological standpoint, it has low systemic toxicity, and its widespread use in approved medicines supports its safety profile.
Neutral methacrylate copolymer improves regulatory confidence.
The material is chemically stable under normal storage conditions, but should be protected from moisture and heat.
Neutral methacrylate copolymer improves storage reliability.
From an environmental perspective, it is not readily biodegradable but generally shows low acute ecological toxicity, so proper disposal is recommended.
Neutral methacrylate copolymer improves environmental responsibility.
Neutral methacrylate copolymer is a low-hazard functional polymer whose main risks are dust exposure and standard industrial handling precautions rather than chemical toxicity, making it widely used in pharmaceutical controlled-release and coating technologies.
