GMATT 300 Series

Key Features

Proprietary Treatment: Specially modified surface ensures exceptional long-term suspension, avoiding hard caking in low-viscosity systems.
Excellent Recoatability: Unlike standard wax treatments, our special formulation guarantees zero loss of inter-coat adhesion.
Extreme Efficiency: High internal pore volume (≥1.8 ml/g) delivers maximum gloss reduction at minimum dosages.
High Shear Stability: Optimized oil absorption allows for easy incorporation and consistent dispersion stability.

Applications

100% UV-Curable Coatings
Premium Solvent-based Wood Finishes
High-end Industrial & Coil Coatings
Leather and Thick-film Plastics Coatings

GMATT 300 Series: Grade Selector

The GMATT 300 Series is optimized for medium to heavy-duty film builds. Select the ideal grade based on your target Dry Film Thickness (DFT) and specific system viscosity.

GMATT 375 d50: 7.5 - 8.0 µm

Recommended DFT: 25 - 35 µm (Medium)

General-purpose grade for high-end wood and coil coatings. Perfect balance of matting efficiency, clarity, and smooth touch.

GMATT 390 d50: 9.0 - 9.5 µm

Recommended DFT: > 35 µm (Thick)

Designed for high-build primers, heavy-duty industrial coatings, and thick leather finishes. Maximum matting power and scratch resistance.

💡 Formulator Tip: The GMATT 300 Series excels in preventing hard caking in difficult systems like UV coatings. For standard topcoats and clear finishes, use GMATT 375. For extreme low-dosage dead-matte or thick-film primers, choose GMATT 390.

General Properties

Typical properties for the GMATT 300 Series. Backed by advanced gel-process technology and proprietary surface modification.

Parameter	Typical Value	Unit
Pore Volume	≥ 1.8	ml/g
Oil Absorption	220 - 270	g/100g
Loss on Drying (2h @ 105°C)	≤ 5.0	%
Loss on Ignition (2h @ 1000°C)	≤ 6.0	%
pH Value (5% aqueous)	6.0 - 8.0	-
SiO₂ Content (dry basis)	≥ 99.0	%
Surface Treatment	Special Treatment	-

* Typical values only. Not for sales specifications. Refer to COA for batch data.

Frequently Asked Questions

Formulation advice and technical solutions from our R&D engineers.

How much silica matting agent should I add to my coating formulation?

The typical addition level ranges from 3% to 8% based on the total formulation weight, depending on your target gloss level (e.g., dead matte vs. satin) and the resin system. We highly recommend conducting a step-ladder test to determine the exact dosage required for your specific Dry Film Thickness (DFT).

What makes the "Special Treatment" of the 300 Series different from standard wax?

Unlike standard PE wax treatments, our proprietary special treatment (used in the GMATT 300 Series) provides robust steric hindrance to prevent hard caking, while guaranteeing exceptional inter-coat adhesion. This is especially critical for UV-curable and multi-layer coating systems where recoatability is a strict requirement.

How to disperse silica matting agents effectively without grinding?

Our synthetic amorphous silica features a highly controlled pore volume and narrow particle size distribution. It can be easily incorporated using a standard high-speed dissolver (e.g., cowles blade) at low shear forces (1500-2000 RPM for 15-20 minutes). Grinding via bead mills is not required and should be avoided to prevent destroying the matting efficiency.

How to prevent hard settling of matting agents in low-viscosity coatings?

For low-viscosity systems like UV curable coatings or deep-penetrating wood primers, hard settling is a common issue. We strongly recommend using the GMATT 300 Series, as its special surface modification offers superior suspension behavior. Additionally, pairing the matting agent with an appropriate rheology modifier (like our Fumed Silica) can create a stable thixotropic network.

How does the particle size (d50) of matting agents affect coating transparency?

Matching the average particle size (d50) to your Dry Film Thickness (DFT) is critical. If the particle size is too large for a thin film, it causes surface roughness and white spots (hazing). Use our GMATT 375 (7.5–8.0 µm) for medium-film clear coats, and GMATT 390 (9.0–9.5 µm) for heavy-duty thick films.

Ready to Test GMATT® 300 Series?

Download the full Technical Data Sheet (TDS) and Safety Data Sheet (SDS), or request a complimentary 500g lab sample for your formulation.

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