Chemical Name: Organopolysilazane
Chemical Category: Organopolysilazane Resin
Product Form: Liquid precursor polymer
CAS NO.: 475645-84-2
Product Description
IOTA 9108 is a liquid precursor polymer composed of repeating Si–N units. It can be used as a thermosetting resin or as a ceramic precursor. Under mild pyrolysis conditions, it converts into high-temperature resistant SiCN ceramics.
The material has low viscosity, short curing time, and multiple curing options. After curing, it forms a high-yield ceramic network with good adhesion to metals, ceramics, graphite, and other substrates, making it easy to prepare SiCN ceramics with high thermal stability up to 1500 °C.
Technical Specifications
Appearance: Colorless to light yellow liquid
Solid Content: >99%
Molecular Weight (Mn): 700–900
Viscosity: 10–30 cPs
VOC: N/A
Ceramic Yield at 800 °C: >55%
Cured Ceramic Yield at 800 °C: >75%
Ceramic Density: 1.60–2.00 g/cm³
Performance
Low viscosity
Short curing time
Multiple curing methods
High ceramic yield
Excellent adhesion to metals, ceramics, and graphite
Easy preparation of SiCN ceramics
High-temperature resistance up to 1500 °C
Applications
Ceramic matrix composites (CMCs)
Metal matrix composites
High-temperature adhesives
Corrosion-resistant coatings
High-temperature oxidation-resistant ceramic coatings
Ceramic preform impregnation
Thermosetting resins
Organic–inorganic hybrid materials
Solvent
IOTA 9108 can be diluted with dry solvents. It is sensitive to water and alcohols, which can cause hydrolysis or alcoholysis, leading to product degradation. Avoid contact with acids, bases, and other protonic substances.
Curing Conditions
Curing can be performed at 120–180 °C in air or inert atmosphere.
Platinum-catalyzed hydrosilylation allows curing at 80–100 °C.
Curing time depends on temperature and catalyst amount, generally 2–5 hours.
Pyrolysis Conditions
Cured IOTA 9108 can be pyrolyzed at high temperatures to form amorphous and crystalline ceramics. Below 1400 °C, products are mainly amorphous; above 1400 °C, crystallization occurs. Ceramic composition depends on pyrolysis atmosphere: N₂ or Ar yields SiC and Si₃N₄; NH₃ yields mainly Si₃N₄; air yields mainly SiOCN. Fillers can influence ceramic composition.
Storage
Unopened: 6 months
Opened: >2 months under sealed, low-temperature, dry conditions
Cleaning
Clean tools immediately after use with acetone or solvent oil.
Once cured, IOTA 9108 cannot be removed with solvents.
Precautions
Use in a ventilated, dry environment.
Wear protective gloves, mask, and goggles.
Do not expose uncured IOTA 9108 to fire, moisture, or water.
