Hydrophilic Treatment for Aqueous Compatibility
Waterborne coatings demand matting agents that genuinely belong in water. Standard silica aggregates under the osmotic pressure changes of waterborne film drying; wax-treated grades introduce organic contamination that destabilises emulsion rheology. HMMAT WB Series is treated with a hydrophilic surface modification that ensures complete, rapid wetout by aqueous binder systems — PUD, acrylic, styrene-acrylic — from first mix through 12-month storage without re-agglomeration or settlement.
Seeding Prevention — Defect-Free Films
Seeding — the appearance of visible grit or micro-aggregates in the dried film — is the leading matting-related quality complaint in waterborne coating supply chains. HMMAT WB's particle-level stabilisation in the aqueous phase prevents flocculation before film formation is complete, giving OEM waterborne brands the defect-free, smooth matte films their customers demand, without the rework or reformulation cycles caused by seeding events.
Zero-VOC — Regulatory Freedom
The waterborne coatings market is driven by VOC regulation. HMMAT WB Series contains no organic wax, no solvent-based treatment, and no volatile organic compounds — contributing exactly zero VOC to the finished formulation. OEM waterborne coating brands gain clean compliance with EU Decopaint Directive limits, LEED certification requirements, California SCAQMD Rule 1113, and national VOC regulations across export markets, without sacrificing matting performance.
FCL Economics for Waterborne Production Scale
Waterborne coating plants converting from solvent-borne to aqueous systems scale up rapidly and need matting agents at production volumes, not laboratory quantities. SEMITECH delivers HMMAT WB in 20 MT FCL with locked specification — d50, BET surface area, hydrophilic index, moisture — supporting your formulation reproducibility from trial batch to full production without specification drift.
OEM Supply Capabilities
- Private-Label Packaging: 25 kg multi-wall paper bags or big-bags (500/1000 kg), custom brand print
- Minimum Order: 1 FCL (20 MT), scaling to multi-FCL contracts
- Certifications: ISO 9001 + REACH + VOC-free declaration + LEED-compatible product data sheet
- Lead Time: 25–35 days first run, 15–20 days repeat orders
- Multi-Port: Shanghai, Ningbo, Tianjin FOB
Grade Selector for Waterborne Coatings
| Grade | d50 / Treatment | DFT Range | Application Fit |
|---|---|---|---|
| HMMAT WB (fine) | 3–5 µm / hydrophilic | 8–20 µm | Thin waterborne topcoat, high clarity |
| HMMAT WB (std) | 5–8 µm / hydrophilic | 15–40 µm | PUD wood, acrylic architectural waterborne |
| HMMAT WB (coarse) | 8–12 µm / hydrophilic | 30–60 µm | Heavy waterborne industrial coatings |
| HMMAT 600 | Precipitated, high OA | Powder | Powder coating matting (dry-blend process) |
Technical FAQ
Waterborne coating formulation challenges and HMMAT WB performance answers.
+What is seeding in waterborne coatings and how does HMMAT WB prevent it?
Seeding refers to the formation of visible grit or micro-aggregates in waterborne coating films, caused by silica particles that partially flocculate in the aqueous phase before film formation is complete. HMMAT WB Series is hydrophilically treated to maintain stable individual particle dispersion throughout the water-based coating lifecycle, preventing seed formation that causes film defects and customer complaints.
+Why is hydrophilic surface treatment important for waterborne matting agents?
Standard silica resists wetting by aqueous phases and tends to aggregate under the osmotic pressure changes during waterborne film drying. HMMAT WB Series is treated with a hydrophilic modification that ensures complete and rapid wetout by water-based binders, prevents re-agglomeration during storage, and remains uniformly distributed throughout the aqueous film-formation process.
+Is HMMAT WB compatible with waterborne polyurethane and acrylic dispersion systems?
Yes. HMMAT WB Series is formulated for compatibility with waterborne polyurethane dispersions (PUD), acrylic and styrene-acrylic emulsions, and alkyd emulsion systems. The hydrophilic surface treatment is compatible with standard waterborne additives including HEUR/HASE thickeners, defoamers, and crosslinkers (polycarbodiimide, aziridine) without interference with their functional mechanisms.
+What VOC compliance advantages does HMMAT WB offer to waterborne coating OEM brands?
HMMAT WB Series contains no organic wax, no solvent-based surface treatment, and no volatile organic compounds — contributing zero VOC to the finished waterborne formulation. This supports compliance with EU Decopaint Directive limits, LEED certification requirements, California SCAQMD Rule 1113, and national VOC regulations in export markets.
+Can HMMAT WB Series be used in waterborne powder coating systems?
HMMAT WB Series is primarily designed for liquid waterborne systems. For powder coating matting requirements, the HMMAT 600 Series (precipitated silica, high oil absorption) is the recommended choice for dry-blend and extrusion processes in powder coating manufacture. Waterborne slurry powder coating systems can utilise HMMAT WB given appropriate process viscosity adjustment.
Recommended Waterborne Coating Solution
For zero-VOC waterborne PUD, acrylic, and aqueous industrial coating systems, we recommend the HMMAT WB Series.
SEMITECH matrix · co-purchase