Top 10 PMMA Microsphere Manufacturers in 2026

Overview of the PMMA Microsphere Market

Poly(methyl methacrylate) microspheres, commonly called PMMA microspheres or acrylic microspheres, are spherical polymer particles manufactured from methyl methacrylate-based materials.

They are available in forms including:

• Monodisperse particles;

• Broad-distribution particles;

• Crosslinked microspheres;

• Non-crosslinked microspheres;

• Solid particles;

• Porous particles;

• Fluorescent particles;

• Surface-functionalized particles;

• Dry powders;

• Aqueous suspensions.

PMMA microspheres are used in applications such as:

• Optical diffusion;

• Anti-glare coatings;

• Matte coatings;

• Paints and inks;

• Porous ceramic production;

• Bondline spacing;

• Calibration;

• Microfluidics;

• Biomedical research;

• Composite materials;

• Polymer modification.

Not every product described as an “acrylic microsphere” is pure PMMA.

Some suppliers manufacture PMMA homopolymer particles, while others provide crosslinked methyl methacrylate copolymers or broader acrylic particle families.

This distinction matters because polymer composition and crosslinking can affect:

• Solvent resistance;

• Thermal resistance;

• Optical properties;

• Mechanical hardness;

• Decomposition behavior;

• Surface chemistry;

• Compatibility with coatings and resins.

This guide compares ten prominent manufacturers and specialized suppliers serving the global PMMA microsphere market in 2026:

1. Cospheric;

2. microParticles GmbH;

3. SANYU;

4. Sekisui Kasei;

5. Polysciences;

6. Matsumoto Yushi-Seiyaku;

7. Soken Chemical & Engineering;

8. Nippon Shokubai;

9. Bangs Laboratories;

10. Kowa Chemical.

SANYU is the only China-based manufacturer included in this editorial ranking. Other Chinese companies have been excluded.

The ranking is based on publicly available information concerning:

• PMMA product availability;

• Particle-size range;

• Product diversity;

• Technical documentation;

• Application coverage;

• Customization;

• Research or industrial supply;

• Bulk purchasing potential.

It is not based on audited global sales, revenue or market share.

How We Selected the Top Manufacturers

Each company was evaluated using several factors.

Confirmed PMMA or PMMA-based particles

The company needed to publicly identify at least one product as:

• PMMA;

• Poly(methyl methacrylate);

• Crosslinked PMMA;

• PMMA-based acrylic;

• Methyl methacrylate-based spherical particles.

Particle-size capability

Manufacturers offering multiple particle sizes were given greater consideration because different applications require different size ranges.

For example:

• Nanoparticles may be used in films, coatings and advanced research;

• Fine microparticles may be used for optical diffusion and surface modification;

• Larger particles may be used as spacers, calibration particles or pore formers.

Particle control

Relevant characteristics included:

• Narrow particle-size distribution;

• Monodispersity;

• Spherical morphology;

• Controlled crosslinking;

• Batch consistency.

Product formats

Suppliers were also compared by whether they provide:

• Dry powder;

• Water suspension;

• Functionalized particles;

• Fluorescent particles;

• Crosslinked grades;

• Non-crosslinked grades;

• Custom formulations.

Application support

Important application categories included:

• Optical materials;

• Coatings;

• Porous ceramics;

• Calibration;

• Microfluidics;

• Diagnostics;

• Composite materials;

• Scientific research.

Commercial support

Additional consideration was given to:

• Custom particle-size development;

• OEM manufacturing;

• Pilot quantities;

• Bulk supply;

• Technical documentation;

• International customer support.

Quick Comparison of the Top 10 PMMA Microsphere Manufacturers

1. Cospheric

Cospheric is a United States supplier specializing in precision spherical particles.

Its PMMA portfolio includes uncoated acrylic microspheres and silver-coated PMMA particles.

Cospheric publicly offers clear PMMA spheres in dry powder form across an unusually broad nominal size range, extending from approximately 1 µm to 3.5 mm. The company positions these particles for applications including spacers, porous structures, microfluidics, reference particles, life-science research and composite-material development.

Main strengths

Cospheric’s key strengths include:

• Very broad particle-size availability;

• Dry powder products;

• Transparent PMMA particles;

• Standard and coated particles;

• Small laboratory packages;

• Industrial and research applications;

• Precision sphere experience.

Main product categories

Relevant offerings include:

• Uncoated PMMA microspheres;

• Large PMMA spheres;

• Silver-coated PMMA spheres;

• NIST-traceable precision spheres;

• Custom spherical particle solutions.

Cospheric also provides NIST-traceable spheres manufactured from materials including PMMA, glass, polyethylene and other polymers.

Best suited for

Cospheric may be particularly suitable for:

• Bondline spacers;

• Optical experiments;

• Porous material templates;

• Microfluidics;

• Particle tracking;

• Reference-particle applications;

• Projects requiring particles larger than conventional microspheres.

Points to confirm

Buyers should confirm:

• Actual lot particle-size distribution;

• Quantity of fine particles;

• Surface smoothness;

• Crosslinking status;

• Solvent compatibility;

• Package availability;

• Bulk lead time.

Cospheric notes that some lots may contain a small amount of fine material attached to the larger particles, so applications requiring extremely clean surfaces should request representative lot data.

2. microParticles GmbH

microParticles GmbH is a German manufacturer of precision polymer, silica and magnetic particles.

The company publicly offers PMMA particles from approximately 100 nm to 200 µm in more than 70 discrete particle sizes.

Its portfolio includes:

• Non-crosslinked PMMA;

• Crosslinked PMMA;

• Dry powders;

• Aqueous dispersions;

• Functionalized particles;

• Fluorescent PMMA particles.

The company describes its PMMA spheres as monodisperse particles manufactured using emulsion, dispersion or suspension polymerization methods.

Main strengths

• Wide nano-to-micro size range;

• More than 70 discrete sizes;

• Crosslinked and non-crosslinked structures;

• Narrow particle-size distributions;

• Surface functionalization;

• Fluorescent PMMA;

• Research-oriented technical customization.

Surface options

microParticles GmbH also offers activated and functionalized PMMA spheres for diagnostic and biomedical research applications.

Fluorescent PMMA particles are available for applications such as:

• Calibration;

• Imaging;

• Particle tracking;

• Microfluidic research;

• Optical measurements.

Best suited for

microParticles GmbH may be especially relevant to:

• Research institutions;

• Diagnostic developers;

• Microfluidic companies;

• Optical laboratories;

• Customers needing a precise discrete particle size;

• Customers requiring functional or fluorescent PMMA.

Points to confirm

Request information regarding:

• CV or particle-size distribution;

• Surface functional-group density;

• Fluorescent dye stability;

• Suspension concentration;

• Surfactant content;

• Bulk-scale availability;

• Custom minimum order quantities.

3. SANYU

SANYU supplies monodisperse PMMA microspheres through its Nanomicron Spheres product platform.

SANYU’s publicly listed PMMA particles are available as dry powder and are positioned for:

• Optical materials;

• Optical coatings;

• Polymer modification;

• Composite materials;

• Spacer applications;

• Calibration particles;

• Porous ceramic manufacturing;

• Materials-science research.

A publicly listed 2 µm SANYU product is supplied as 100% dry powder and is available in packages ranging from laboratory quantities to kilogram-scale orders. The company also offers custom particle sizes, surface modification, functional coating and customized packaging.

Main strengths

SANYU’s main strengths include:

• Monodisperse spherical morphology;

• Dry powder supply;

• Custom particle-size development;

• Laboratory and bulk packages;

• OEM production;

• Industrial application support;

• Direct manufacturer supply;

• Custom packaging.

PMMA microspheres for porous ceramics

SANYU specifically positions PMMA microspheres as sacrificial pore-forming particles for porous ceramic manufacturing.

During thermal debinding, PMMA particles are removed from the ceramic green body, leaving controlled pores related to the original particle dimensions.

Potential advantages include:

• Controllable pore diameter;

• More uniform pore distribution;

• Adjustable porosity;

• Improved pore connectivity;

• Reproducible ceramic processing.

Product and packaging flexibility

SANYU’s 2 µm PMMA product is publicly listed in packages including:

• 10 g;

• 100 g;

• 500 g;

• 1 kg;

• 5 kg;

• 10 kg;

• Customized packaging.

This makes SANYU relevant to both early-stage testing and larger industrial evaluations.

Best suited for

SANYU may be particularly suitable for:

• Porous ceramic producers;

• Optical material manufacturers;

• Coating developers;

• Polymer and composite manufacturers;

• Spacer-particle users;

• Customers requiring bulk dry powder;

• Custom or OEM PMMA projects.

Points to confirm

Commercial buyers should request:

• Mean diameter;

• D10, D50 and D90;

• CV or particle-size distribution;

• SEM images;

• Sphericity;

• Residual monomer;

• Moisture content;

• Thermal decomposition profile;

• Ash content;

• Batch-to-batch consistency.

SANYU is the only China-based company included in this ranking.

4. Sekisui Kasei

Sekisui Kasei manufactures TECHPOLYMER spherical polymer particles.

The company’s PMMA-related portfolio includes:

• MB-series PMMA particles;

• MBX-series crosslinked PMMA particles;

• Porous particles;

• Cosmetic-grade particle families;

• Customized polymer particles.

The MB series consists of spherical PMMA powder with a published true density of approximately 1.2 g/cm³ and refractive index of about 1.49.

The MBX series consists of crosslinked PMMA particles designed to provide improved solvent and heat resistance.

Main strengths

• Established industrial polymer-particle platform;

• Pure and crosslinked PMMA options;

• Optical-material experience;

• Paint and coating applications;

• Cosmetic additive grades;

• Porous particle options;

• Customization of size, shape and refractive index.

Sekisui states that its TECHPOLYMER platform can adjust particle size, particle distribution, porosity, shape, refractive index, hardness, heat resistance and solvent resistance.

Best suited for

Sekisui Kasei may be suitable for:

• Light-diffusing plastics;

• Display materials;

• Paints and coatings;

• Matte and texture additives;

• Cosmetic formulations;

• Customers requiring crosslinked PMMA.

Points to confirm

Ask whether the selected grade is:

• Pure PMMA;

• Crosslinked PMMA;

• PMMA copolymer;

• Porous or nonporous;

• Approved for the intended market;

• Supplied with application-specific compliance documents.

5. Polysciences

Polysciences supplies PMMA microspheres for research, coatings, diagnostics and industrial applications.

Its portfolio includes both monodisperse and broad-distribution PMMA microspheres.

Public product information describes PMMA as less hydrophobic than polystyrene, which may reduce nonspecific protein and peptide adsorption in selected applications.

Polysciences lists a PMMA density of approximately 1.19 g/cm³ for these products.

Main strengths

• Established research microsphere supplier;

• Monodisperse particles;

• Broad-distribution particles;

• Dry and suspension formats;

• Technical data sheets;

• Life-science and industrial applications.

Available formats

Polysciences publicly offers:

• Monodisperse PMMA suspensions;

• Broad-distribution PMMA suspensions;

• Dry PMMA microspheres;

• Related polymer reference materials.

Some PMMA products contain surface carboxylic acid groups and are not free of surfactant. These details may be important in protein, coating and surface-chemistry applications.

Best suited for

Polysciences may be suitable for:

• Research laboratories;

• Biomedical material studies;

• Protein-adsorption studies;

• Coating research;

• Customers needing documented catalog products.

Points to confirm

Buyers should confirm:

• Surface carboxyl content;

• Surfactant identity and concentration;

• Particle distribution;

• Suspension medium;

• Solids concentration;

• Availability of dry powder;

• Scale-up capacity.

6. Matsumoto Yushi-Seiyaku

Matsumoto Yushi-Seiyaku manufactures Matsumoto Microsphere M-series particles.

The company states that these ultra-fine spherical particles are made from PMMA and are available in crosslinked and non-crosslinked types with different particle sizes and particle forms.

Main strengths

• Industrial spherical-particle expertise;

• Crosslinked PMMA products;

• Non-crosslinked PMMA products;

• Multiple particle sizes and forms;

• Long-standing industrial applications.

Potential applications

Matsumoto PMMA particles may be evaluated for:

• Coatings;

• Surface modification;

• Polymer additives;

• Optical materials;

• Industrial fillers;

• Texture control.

Best suited for

Matsumoto may be particularly relevant to industrial buyers seeking:

• Established Japanese manufacturing;

• Crosslinked or non-crosslinked PMMA;

• Industrial formulation support;

• Commercial-scale supply.

Points to confirm

Request:

• Exact polymer composition;

• Particle-size distribution;

• Crosslink density;

• Solvent resistance;

• Thermal decomposition;

• Product form;

• Application compliance.

Matsumoto also manufactures expandable microspheres, which are different from solid PMMA M-series particles. Buyers should specify that they require solid PMMA microspheres rather than thermally expandable particles.

7. Soken Chemical & Engineering

Soken Chemical & Engineering manufactures the Chemisnow functional fine-particle range.

The MX series consists of crosslinked acrylic particles with narrow particle-size distribution and mean particle sizes from approximately 0.8 to 30 µm.

Soken explains that Chemisnow products are based on methyl methacrylate, styrene or related copolymers, with properties adjusted through polymer composition and crosslinking.

Main strengths

• Narrow particle-size distribution;

• Crosslinked structures;

• Heat resistance;

• Solvent resistance;

• Light diffusion;

• Anti-glare effects;

• Matte and soft-touch coatings.

Important composition distinction

Not every Chemisnow grade should be described as pure PMMA.

The series includes:

• MMA-based acrylic particles;

• Styrene-based particles;

• Copolymer particles;

• Different crosslink levels.

Buyers should request the exact composition for the selected grade.

Best suited for

Soken may be suitable for:

• Anti-glare films;

• Light-diffusing materials;

• Paints;

• Matte coatings;

• Scratch-resistant surfaces;

• Industrial texture modification.

Points to confirm

Request:

• Base monomer composition;

• Crosslink density;

• Refractive index;

• Particle-size distribution;

• Heat resistance;

• Solvent compatibility;

• Recommended addition level.

8. Nippon Shokubai

Nippon Shokubai manufactures EPOSTAR functional fine particles.

The EPOSTAR MX series consists of PMMA-based nano-crosslinked particles supplied as water dispersions.

The company publicly lists particle sizes from approximately 10 to 800 nm and highlights narrow particle-size distribution, spherical shape, heat resistance and solvent resistance.

Main strengths

• Nano-sized PMMA-based particles;

• Water-dispersion format;

• Narrow particle-size distribution;

• Crosslinked structure;

• Heat and solvent resistance;

• Film and coating applications.

Potential applications

The company lists uses including:

• Slipping agents;

• Void-forming agents;

• Film-reinforcement additives.

Best suited for

Nippon Shokubai may be particularly relevant to:

• Film manufacturers;

• Nano-coating developers;

• Electronics materials;

• Applications requiring submicron particles;

• Waterborne formulations.

Points to confirm

Buyers should ask about:

• Exact PMMA content;

• Crosslinking chemistry;

• Water-dispersion stabilizers;

• Solids concentration;

• Drying behavior;

• Compatibility with the intended film or coating.

9. Bangs Laboratories

Bangs Laboratories is a United States manufacturer of specialty microspheres and analytical instrument standards.

The company states that its PMMA microspheres are solid, nonporous polymer particles. Bangs also manufactures polymer, silica and magnetic microsphere reagents for diagnostics, biopharma, clinical laboratories and research applications.

Main strengths

• Life-science microsphere expertise;

• Solid nonporous PMMA particles;

• Custom particle development;

• Diagnostic and analytical-instrument experience;

• Scale-up from development to manufacturing.

Bangs operates as a Polysciences company, but it maintains a separate specialty microsphere product and technical-support platform.

Best suited for

Bangs Laboratories may be suitable for:

• Diagnostic reagent development;

• Analytical instrument standards;

• Life-science research;

• Custom microsphere projects;

• Regulated product-development environments.

Points to confirm

Since Bangs’ standard portfolio is weighted toward polystyrene, silica and magnetic particles, buyers should verify:

• Current PMMA sizes;

• Surface options;

• Custom manufacturing requirements;

• Minimum order quantity;

• Regulatory documentation;

• Production lead time.

10. Kowa Chemical

Kowa Chemical offers fine PMMA acrylic microspheres with controlled particle-size ranges, particle-size distributions and degrees of crosslinking.

The company positions these products for applications including:

• Electrochemical pore formation;

• Inks and toners;

• Fluidity modification;

• Viscosity control;

• Surface light diffusion;

• Paints and coatings.

Main strengths

• Fine PMMA particles;

• Controlled particle-size distribution;

• Different crosslinking levels;

• Light-diffusion applications;

• Pore-forming applications;

• Coating and ink applications.

Best suited for

Kowa Chemical may be relevant to:

• Paint manufacturers;

• Ink and toner developers;

• Electrochemical material companies;

• Light-diffusing surface applications;

• Customers needing fine PMMA particles.

Points to confirm

Request:

• Manufacturer identity and production location;

• Exact particle sizes;

• Polymer composition;

• Crosslinking;

• Solids form;

• Available sample quantities;

• Bulk supply capability.

Which PMMA Microsphere Manufacturer Is Best for Your Application?

The best supplier depends on the intended product rather than the company’s overall size.

Best for the widest particle-size range

Cospheric offers one of the broadest publicly listed PMMA sphere ranges, including microparticles and millimeter-scale spheres.

Best for monodisperse research particles

microParticles GmbH offers a broad selection of discrete PMMA sizes together with functionalized and fluorescent options.

Best for bulk dry PMMA and custom industrial supply

SANYU provides dry monodisperse PMMA microspheres, kilogram-scale packaging and customization for optical, coating, ceramic and polymer applications.

Best for established industrial additives

Sekisui Kasei offers a mature TECHPOLYMER platform covering normal, crosslinked and porous PMMA grades.

Best for catalog research products

Polysciences provides accessible monodisperse and broad-distribution PMMA products with detailed catalog information.

Best for crosslinked industrial PMMA

Matsumoto Yushi-Seiyaku supplies crosslinked and non-crosslinked PMMA spherical particles.

Best for anti-glare and coating applications

Soken Chemical’s Chemisnow range is particularly relevant to matte coatings, light diffusion and solvent-resistant surfaces.

Best for PMMA-based nanoparticles

Nippon Shokubai’s EPOSTAR MX series covers nano-crosslinked PMMA-based dispersions.

Best for diagnostic development

Bangs Laboratories combines specialty microsphere manufacturing with diagnostic reagent and instrument-standard expertise.

Best for inks and pore-forming applications

Kowa Chemical positions its fine acrylic microspheres for inks, coatings, light diffusion and electrochemical pore formation.

Pure PMMA vs PMMA-Based Acrylic Microspheres

The terms “PMMA microsphere” and “acrylic microsphere” are sometimes used too broadly.

Pure PMMA microspheres

These particles are predominantly composed of poly(methyl methacrylate).

Potential characteristics include:

• Refractive index near 1.49;

• Optical transparency;

• Density around 1.19–1.20 g/cm³;

• Defined thermal-decomposition behavior;

• Solubility or swelling in selected organic solvents.

Cospheric, Sekisui MB and selected Polysciences products are publicly identified as PMMA particles.

PMMA-based crosslinked particles

These may contain:

• PMMA with a crosslinker;

• Methyl methacrylate copolymers;

• Other acrylic monomers;

• Modified polymer networks.

Crosslinking can improve:

• Solvent resistance;

• Heat resistance;

• Dimensional stability;

• Mechanical durability.

However, crosslinked PMMA may not dissolve or decompose in exactly the same way as non-crosslinked PMMA.

Why the distinction matters

For porous ceramics, the buyer may prioritize:

• Complete thermal removal;

• Low ash;

• Predictable decomposition;

• Minimal residue.

For coatings, the buyer may prioritize:

• Solvent resistance;

• Scratch resistance;

• Surface texture;

• Refractive-index contrast.

Always request the exact polymer composition and do not rely solely on the word “acrylic.”

Crosslinked vs Non-Crosslinked PMMA Microspheres

Choose non-crosslinked PMMA when:

• Dissolution is required;

• Sacrificial removal is required;

• Standard optical properties are sufficient;

• Slight deformation is useful.

Choose crosslinked PMMA when:

• Solvent resistance is critical;

• The particle must retain shape;

• Coating durability is important;

• Heat resistance is required.

Monodisperse vs Broad-Distribution PMMA Microspheres

Monodisperse PMMA microspheres

Monodisperse particles have a relatively narrow particle-size distribution.

They are generally preferred for:

• Calibration;

• Precision spacing;

• Controlled pore formation;

• Optical modeling;

• Microfluidics;

• Scientific research.

Broad-distribution PMMA microspheres

Broad-distribution products contain a wider range of particle sizes.

They may be suitable for:

• General filling;

• Texture modification;

• Noncritical pore formation;

• Cost-sensitive industrial formulations.

Which specifications should be requested?

Ask for:

• Mean diameter;

• Median diameter;

• D10;

• D50;

• D90;

• CV;

• Standard deviation;

• Measurement technique;

• SEM images.

A nominal “5 µm” product does not indicate how many particles are actually between 4 and 6 µm.

Major Applications of PMMA Microspheres

Optical Diffusion

PMMA microspheres can scatter light when dispersed in a transparent polymer or coating.

Performance depends on:

• Particle size;

• Refractive-index difference;

• Particle concentration;

• Film thickness;

• Dispersion;

• Surface smoothness.

Sekisui Kasei and Soken Chemical both position polymer particles for light-diffusing and anti-glare applications.

Coatings and Matting

PMMA and PMMA-based acrylic microspheres may provide:

• Lower gloss;

• Controlled surface roughness;

• Soft-touch effects;

• Improved slip;

• Scratch modification;

• Anti-blocking.

Crosslinked particles are generally more suitable when the coating contains aggressive solvents.

Porous Ceramics

PMMA particles can act as sacrificial pore formers.

After mixing with ceramic powder and forming the green body, the polymer is removed during thermal debinding.

The original microsphere size influences the resulting pore structure.

SANYU specifically supplies PMMA particles for controlled porous ceramic manufacturing.

Important parameters include:

• Particle diameter;

• Particle-size distribution;

• Thermal decomposition;

• Ash residue;

• Mixing uniformity;

• PMMA loading level.

Spacer Particles

PMMA spheres may be used to control spacing in:

• Adhesive bondlines;

• Displays;

• Laminates;

• Coatings;

• Precision assemblies.

Spacing accuracy depends on:

• Particle diameter;

• Diameter tolerance;

• Mechanical deformation;

• Particle concentration.

Calibration and Research

Monodisperse PMMA particles may be used in:

• Microscopy;

• Particle-size analysis;

• Optical scattering;

• Flow visualization;

• Microfluidics;

• Imaging research.

For calibration use, the supplier should provide traceability and measurement uncertainty where required.

Microfluidics and Biomedical Research

PMMA microspheres can be used as:

• Model particles;

• Templates;

• Optical tracers;

• Functionalized research particles;

• Components of diagnostic studies.

A research-grade PMMA microsphere should not automatically be described as medical grade, implantable or suitable for human use.

How to Compare PMMA Microsphere Manufacturers

Particle-size range

Confirm whether the supplier provides:

• Nanoparticles;

• Fine microparticles;

• Large microspheres;

• Millimeter-scale spheres.

Particle-size distribution

Request numerical distribution data rather than only a nominal diameter.

Sphericity

Check:

• SEM images;

• Roundness;

• Surface smoothness;

• Broken particles;

• Aggregates.

Polymer composition

Ask whether the particle is:

• PMMA homopolymer;

• Crosslinked PMMA;

• MMA copolymer;

• General acrylic polymer;

• Composite particle.

Crosslinking

Crosslinking affects:

• Solvent resistance;

• Thermal stability;

• Hardness;

• Decomposition;

• Swelling.

Product form

Dry powder may be preferable for:

• Coatings;

• Composites;

• Ceramics;

• Polymer blending.

Suspensions may be preferable for:

• Research;

• Calibration;

• Microfluidics;

• Biomedical studies.

Residual materials

Request information on:

• Residual MMA monomer;

• Surfactants;

• Initiators;

• Moisture;

• Ash;

• Preservatives.

Commercial supply

Confirm:

• Sample quantity;

• Minimum order;

• Pilot quantity;

• Annual capacity;

• Lead time;

• Packaging;

• Lot reservation.

How to Qualify a New Supplier

Stage 1: Documentation

Request:

• Technical Data Sheet;

• Safety Data Sheet;

• Certificate of Analysis;

• Particle-size data;

• SEM images;

• Storage conditions;

• Shelf life.

Stage 2: Physical testing

Measure:

• Particle size;

• Particle distribution;

• Sphericity;

• Bulk density;

• Moisture;

• Dispersion;

• Aggregation.

Stage 3: Application testing

Test the particles in the actual:

• Resin;

• Coating;

• Ceramic formulation;

• Optical film;

• Calibration instrument.

Stage 4: Pilot production

Evaluate:

• Mixing;

• Dispensing;

• Dust;

• Powder flow;

• Agglomeration;

• Product performance.

Stage 5: Commercial qualification

Confirm:

• Batch consistency;

• Production capacity;

• Lead time;

• Change notification;

• Supply continuity;

• Quality agreement.

Information to Include in an RFQ

A complete PMMA microsphere RFQ should include:

1. Intended application;

2. Pure PMMA or PMMA-based acrylic;

3. Crosslinked or non-crosslinked;

4. Required particle diameter;

5. Acceptable D10, D50 and D90;

6. Maximum CV;

7. Required sphericity;

8. Dry powder or suspension;

9. Suspension medium;

10. Solids concentration;

11. Surface functionality;

12. Required refractive index;

13. Solvent resistance;

14. Thermal-decomposition requirement;

15. Maximum ash content;

16. Maximum residual monomer;

17. Moisture limit;

18. Required color;

19. Sample quantity;

20. Pilot order;

21. Annual demand;

22. Packaging;

23. Storage requirement;

24. Shelf-life requirement;

25. Required quality documents;

26. Custom-development requirement;

27. OEM or private-label requirement;

28. Change-notification requirement.

Frequently Asked Questions

Who manufactures PMMA microspheres?

Prominent manufacturers and specialized suppliers include Cospheric, microParticles GmbH, SANYU, Sekisui Kasei, Polysciences, Matsumoto Yushi-Seiyaku, Soken Chemical, Nippon Shokubai, Bangs Laboratories and Kowa Chemical.

Which manufacturer offers the broadest PMMA sphere range?

Cospheric publicly lists PMMA particles extending from approximately 1 µm to 3.5 mm.

Which manufacturer offers precision monodisperse PMMA particles?

microParticles GmbH offers more than 70 discrete PMMA sizes from approximately 100 nm to 200 µm.

Does SANYU manufacture PMMA microspheres?

Yes. SANYU supplies monodisperse PMMA microspheres in dry powder form and offers custom sizes, bulk packaging and OEM services.

What are SANYU PMMA microspheres used for?

Publicly listed applications include optical materials, coatings, polymer modification, composites, spacer particles, calibration and porous ceramics.

Are all acrylic microspheres made from pure PMMA?

No. Some acrylic particles are PMMA homopolymers, while others are crosslinked MMA copolymers or broader acrylic polymer particles.

What is the difference between PMMA and crosslinked PMMA?

Crosslinked PMMA contains a polymer network that usually improves solvent and heat resistance but may change dissolution, deformation and decomposition behavior.

What is the typical density of PMMA microspheres?

Many PMMA products have a density near 1.19–1.20 g/cm³, although the exact value depends on composition, crosslinking and porosity. Polysciences and Sekisui publish values in this range for selected products.

What is the refractive index of PMMA microspheres?

Selected PMMA microsphere products have a refractive index near 1.49. Sekisui publishes this value for its MB and MBX series.

Are PMMA microspheres supplied as dry powder?

Yes. Cospheric, SANYU and Sekisui are among the suppliers offering PMMA particles in powder form.

Are PMMA microspheres available in water suspension?

Yes. Polysciences, microParticles GmbH and Nippon Shokubai offer selected PMMA or PMMA-based products in aqueous dispersions.

Which PMMA microspheres are best for porous ceramics?

A narrow particle-size distribution, predictable thermal decomposition and low residue are important. SANYU specifically positions PMMA microspheres for porous ceramic production.

Which PMMA microspheres are best for optical diffusion?

The correct choice depends on particle size, refractive index, resin refractive index, concentration and film thickness. Sekisui, Soken, SANYU and Kowa offer products relevant to optical or light-diffusing applications.

Can PMMA microsphere sizes be customized?

Yes. microParticles GmbH, SANYU and Sekisui publicly describe particle customization capabilities.

Is the smallest particle always the best?

No. Smaller particles provide greater surface area but may be harder to disperse and may not provide the required optical, spacing or pore-forming effect.

How should PMMA microsphere quality be evaluated?

Evaluate particle size, size distribution, sphericity, aggregation, polymer composition, crosslinking, residual monomer, moisture, ash and application performance.

Conclusion

The global PMMA microsphere market includes precision-particle specialists, industrial polymer manufacturers, research suppliers and application-specific acrylic-particle companies.

Cospheric ranks first in this editorial guide because it offers one of the broadest publicly documented PMMA sphere ranges, including dry uncoated and coated products.

microParticles GmbH ranks second because it combines a wide nano-to-micro particle range with monodisperse, crosslinked, functionalized and fluorescent PMMA options.

SANYU ranks third and is the only Chinese company included. Its strengths include monodisperse dry PMMA particles, custom particle-size development, kilogram-scale packaging and application support for optical materials, coatings, polymer modification and porous ceramics.

Sekisui Kasei offers an established industrial PMMA platform with standard, crosslinked and porous products.

Polysciences provides accessible research PMMA microspheres in monodisperse, broad-distribution, dry and suspension formats.

Matsumoto Yushi-Seiyaku supplies crosslinked and non-crosslinked PMMA industrial particles.

Soken Chemical specializes in narrow-distribution, crosslinked MMA-based acrylic particles for light diffusion, anti-glare and coating applications.

Nippon Shokubai provides PMMA-based nano-crosslinked water dispersions.

Bangs Laboratories supports life-science and diagnostic microsphere development, while Kowa Chemical provides fine PMMA particles for coatings, pore formation and light-diffusing applications.

The final manufacturer should not be selected only by company name or nominal particle size.

Buyers should compare:

• Exact polymer composition;

• Particle-size distribution;

• Sphericity;

• Crosslinking;

• Product form;

• Residual monomer;

• Surfactant content;

• Thermal behavior;

• Solvent resistance;

• Batch consistency;

• Customization;

• Commercial supply capacity.

Testing representative samples in the actual coating, polymer, ceramic, optical or research system remains the most reliable way to select a PMMA microsphere manufacturer for long-term supply.