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SIOResin
May 8, 2025May 9, 2025

SIOResin® Methyl Vinyl Polysilazane

SIO-9312 is a methyl vinyl polysilazane polymer with a Si–N bonded backbone. The molecular structure contains reactive carbon-carbon double bonds (Si–C=CH₂), offering unsaturated reactive sites. This polymer exhibits unique reactivity: the Si–N bonds readily react with hydroxyl-containing substances, enabling its use as an amine-type curing agent. Meanwhile, the unsaturated double bonds allow for addition reactions, facilitating molecular weight regulation or functional group introduction.


SIO-9312 combines the processability of organosilicon materials with the high-temperature resistance of inorganic compounds, offering thermal stability up to 600–800°C. It can also be pyrolyzed into ceramic materials. Price: $120/L

Download TDS

Methyl Vinyl Polysilazane Applications

Resin Modification

Through addition reactions between its vinyl groups and unsaturated resins (e.g., polybutadiene, unsaturated polyester), SIO-9312 significantly enhances the crosslinking density and thermal resistance. For hydroxyl-containing resins (such as epoxy or phenolic), the Si–N bonds participate in the curing reaction, increasing the glass transition temperature (Tg) by 20–30%, and improving weatherability and UV resistance.

Rubber Industry

As a processing aid for silicone rubber, it optimizes the microstructure of vulcanized rubber and raises the heat resistance by over 50°C. It also improves tensile strength and abrasion resistance. Suitable for synthetic rubbers such as SBR and NBR, introducing silazane structures enhances thermal and mechanical performance.

Ceramic Precursors and Functional Coatings

SIO-9312 serves as a precursor for fabricating SiC/Si₃N₄ composite ceramics, ideal for high-temperature components in aerospace engines. In coatings, its derivatives form dense protective layers that provide corrosion and oxidation resistance, maintaining performance under extreme conditions.

Technical Specifications

Test ItemValue
Appearance & ColorPale yellow to colorless transparent liquid
Viscosity (DIN-4 Cup)11 seconds
Active Content≥95%
Solid Content (120±2°C)>96%
Density (g/mL)1.02 ± 0.01
Molecular Weight Range255–591
Hardness (Pencil Test)≥4H
AdhesionGrade 0 (Excellent)
Salt Spray Resistance>800 hours
Methyl Vinyl Polysilazane Resin

Curing Conditions

(Relative humidity: 50%, dry film thickness: 5–25 μm)

Temperature (°C)Touch Dry (h)Full Cure (h)
1651.01.0
1800.21.0
2000.10.5
2500.10.5

Application Instructions

Standard Procedure:
Surface treatment → Sandblasting/rust removal → Cleaning & drying → Coating → Curing

Key Notes:

  • Surface Preparation: Sandblast or grind to remove oxide scale, rust, and oil. Recommended surface cleanliness: Sa2.5 (optimal), minimum St3.
  • Cleaning & Drying: Use a dedicated degreaser or cleaner; ensure surface is thoroughly dry.
  • Product Preparation: Single-component liquid; shake well before use and filter with 400-mesh.
  • Application: Spray recommended (nozzle 0.5–1.0 mm) for best film uniformity and appearance.
  • Curing: For <400°C use: bake at 180°C for 30 min after 10 min air dry. For >400°C use: bake at 250°C for 30 min after 10 min air dry.

Storage & Transportation Requirements

  1. Store in a dry, cool, and ventilated place, away from heat and open flames. Keep sealed and avoid direct sunlight.
  2. Storage temperature: 5–30°C; shelf life: 6 months.
  3. Reseal any unused material immediately to prevent moisture contamination.
  4. Do not reuse leftover mixed coating. Dispose of according to local regulations.
  5. Expired products may be used after passing quality tests.

About SIOResin (SIO New Material)

SIOResin is a leading company in China specializing in the development and production of new materials. We manufacture and supply high-quality silicone resins, silicone-modified polyesters, water-based polyurethanes, water-based acrylics, UV resins, liquid silicone rubber, intumescent fireproof coatings, flame retardants, wetting agents, curing agents, associative thickeners, driers, soft-touch agents, and other additives. Our products have a wide range of applications and with competitive prices.

To learn more or to request samples, feel free to contact us. We are always here to help with your adhesive needs!

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