As performance requirements for functional coatings continue to rise, materials that combine easy processing with strong protective properties are increasingly in demand. IOTA 9150 Organopolysilazane (OPSZ) is a single-component resin designed to deliver transparency, high hardness, and excellent adhesion under room-temperature curing conditions.

1. What Is Organopolysilazane?

Organopolysilazanes are polymers characterized by a Si–N backbone structure. Unlike traditional polysiloxanes (Si–O–Si), these materials contain reactive Si–NH–Si bonds, which enable moisture-induced curing.

When exposed to air, IOTA 9150 undergoes:

• Hydrolysis of Si–NH–Si bonds

• Oxidation reactions

• Chemical bonding with –OH groups on substrate surfaces

These reactions gradually form a three-dimensional crosslinked network, converting the liquid resin into a dense, transparent, and hard solid coating.

2. Room-Temperature Curing with High Surface Hardness

One of the key advantages of IOTA 9150 is its ability to cure at ambient conditions.

At 20–25°C:

• Tack-free time: approx. 2 hours

• Full cure: approx. 3 days

Hardness development:

• 4H after 1 day

• 6H after 3 days

• Up to 8H with post-curing at 120°C for 2 hours

This flexibility allows both ambient application and enhanced hardness through thermal treatment.

3. Excellent Adhesion and Chemical Resistance

Thanks to the reactivity of Si–NH–Si bonds with surface hydroxyl groups, IOTA 9150 forms strong chemical bonding with metals, glass, and inorganic substrates.

It provides:

• Adhesion grade 0 (cross-cut test on metal)

• Resistance to alcohols, ketones, and organic solvents

• Oxidation and corrosion resistance

• Non-flammability after curing

• Visible light transmittance above 90%

With a water contact angle of approximately 105°, the cured coating also offers hydrophobic and easy-to-clean properties.

4. Single-Component and Easy to Apply

IOTA 9150 is a single-component system with over 99% solid content. It can be diluted with ethers or alkanes but must not be diluted with alcohols or water.

After application, tools should be cleaned immediately with acetone or solvent oil. Once fully cured, the coating becomes highly resistant and difficult to remove using conventional solvents.

5. Typical Applications

Due to its transparency, hardness, adhesion, and durability, IOTA 9150 is suitable for:

• Anti-graffiti building coatings

• Metal anti-corrosion protection

• Silicone resin curing systems

• Hardness enhancement of organic resins