Methyl DT Silicone Resin
ST-T Series Methyl DT Silicone Resin is a high-performance organosilicon polymer made of D (dimethylsiloxy) and T (trimethylsiloxy) units. Its branched structure offers excellent heat resistance, durability, water repellency, and insulation. Commonly used in high-temp coatings, electronics, composites, and aerospace protection.
Product Overview
Si-T Series Methyl DT Silicone Resin is a high-performance, cross-linked organosilicon polymer composed of dimethylsiloxy (D units) and trimethylsiloxy (T units). This unique D–T molecular architecture forms a highly branched, cage-like network structure with outstanding thermal resistance, mechanical stability, hydrophobicity, and electrical insulation properties.
It is widely used in high-temperature coatings, electrical insulation systems, advanced composite materials, release agents, and aerospace-grade protective coatings.
Key Properties
✅ Superior Thermal Stability: Maintains structural integrity under continuous heat exposure up to 600°C, ideal for industrial and electronic applications.
✅ Excellent Hydrophobicity: Provides long-lasting water and moisture resistance, enhancing surface durability in outdoor or humid environments.
✅ Outstanding Electrical Insulation: Features high volume resistivity, suitable for insulating varnishes and encapsulants in motors, transformers, and PCB components.
✅ UV and Weather Resistance: Resists yellowing, cracking, and degradation from prolonged UV or atmospheric exposure.
✅ High Film Hardness: Forms durable, glossy films with excellent adhesion to various substrates including glass, metal, and polymer surfaces.
✅ Multi-Functional Compatibility: Works well with other silicones, alkyds, epoxies, and organic resin systems.
Typical Specifications
| Property | Typical Value |
|---|---|
| Appearance | White to light-yellow powder or flakes |
| Composition | D:T structural units with methyl side chains |
| Solid Content | ≥ 97% (powder) / 50–60% (solvent solution) |
| Thermal Resistance | Up to 600 °C (with phenyl-modified grades) |
| Electrical Resistivity | ≥ 1×10¹³ Ω·cm |
| Solubility | Soluble in toluene, xylene, and PDMS fluids |
| Storage Stability | 12–24 months under sealed, dry conditions |
Recommended Applications
High-Temperature Industrial Coatings: Used in protective coatings for heaters, exhaust systems, reactors, and furnace linings.
Electrical and Electronic Insulation: Suitable for insulating varnishes, encapsulating compounds, and potting materials in high-voltage environments.
Mold Release Formulations: Acts as a high-efficiency, low-surface-energy additive in thermoplastics, polyurethanes, epoxy systems, and pressure-sensitive adhesives (PSAs).
Silicone Rubber Reinforcement: Enhances tensile strength, tear resistance, and elasticity in LSR, HTV, and RTV silicone rubbers.
Aerospace and LED Coatings: Provides radiation resistance and thermal endurance for LED encapsulants, satellite components, and optical devices.
Weather-Resistant Paints and Sealants: Offers improved film hardness and anti-aging performance in architectural and marine coatings.
Recommended Silico® Grades
| Grade | Structure Type | Phenyl Content | Features | Applications |
|---|---|---|---|---|
| Silico® DT‑M5206 | Pure Methyl DT | None | Fast curing, high heat resistance, excellent release | Mold release agents, thermal films |
| Silico® DT‑BP112 | Methyl/Low Phenyl DT | Low (5–10%) | Balanced hardness and resin compatibility | Architectural coatings, industrial primers |
| Silico® DT‑BP211 | Methyl / Medium Phenyl DT | Medium (10–20%) | Improved gloss, flexibility, and weatherability | Protective coatings, anti-graffiti layers |
| Silico® DT‑HP271 | Methyl/High Phenyl DT | High (20–30%) | Superior thermal and UV stability, high refractive index | High-temp coatings, flame-retardant and optical coatings |
| Silico® DT‑HR300 | T-rich DT (High Hardness) | Medium | Hard transparent film, excellent chemical resistance | High-end electronic films, release coatings |
Usage Guidelines
Recommended Dosage: Typically 1% to 50%, adjustable based on specific formulation goals.
Processing: Can be added directly as powder or flakes, or dissolved in compatible solvents such as xylene, toluene, or cyclic silicones. Curing typically involves thermal or catalytic condensation.
Packaging & Storage
Packaging:
Powder/flake form: 25 kg / 50 kg fiber drums
Solution form: 40 kg plastic drums
Storage Conditions:
Store in a dry, sealed container below 25°C.
Avoid moisture and acid/alkali contamination.
Shelf life: 12–24 months (unopened).
Transportation: Classified as non-hazardous; handle as standard industrial chemical.
Why Choose Our Methyl DT Silicone Resin?
Precision-engineered D:T ratio and high cross-link density
Reliable quality for electronics, coatings, rubber, and aerospace
Customizable grades for specific thermal, electrical, or hydrophobic needs
Backed by expert formulation support and consistent technical data
Jessica G.
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