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Epoxy-Terminated Phenyl Trisiloxane IOTA 279 High-Performance Silicone Modifier—Imparting Outstanding Toughness and Stability to Polymers

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Redefining the Performance Limits of Polymers

IOTA 279 is a reactive modifier featuring a bis-glycidyl phenyl trisiloxane structure, specifically designed to enhance the overall performance of polymers such as epoxy resins, polyurethanes, and polycarbonates. It is not merely an additive but an active component that participates in curing and polymerization reactions, reconstructing material properties at the molecular level to significantly improve toughness, weather resistance, and functional adaptability.


Six Core Advantages, Shaping Exceptional Material Performance

1. Enhanced Toughness, Impact Resistance

Significantly improves the flexibility and impact resistance of materials like epoxy resins, reducing the risk of brittle fracture.

2. Optimized High- and Low-Temperature Stability

Provides excellent resistance to high and low temperature cycling, making it suitable for applications in extreme environments.

3. Superior Electrical Insulation Performance

Enhances dielectric properties and electrical reliability, ideal for electronic encapsulation and insulation applications.

4. Strong Atomic Oxygen Resistance

Exhibits outstanding resistance to atomic oxygen erosion in aerospace and specialized environments.

5. Reduced Cohesive Energy, Improved Processability

Optimizes internal stress distribution in materials, enhancing process adaptability and product reliability.

6. Long-Term Water and Weather Resistance

Introduces silicone segments to significantly improve hydrophobicity and outdoor durability of materials.


Precise Technical Specifications, Consistent Quality

Parameter Specification
Appearance Colorless to light yellow transparent liquid
Epoxy Equivalent Weight 260–340 g/equ
Refractive Index (25°C) 1.474
Viscosity 15–30 cst
Main Component Bis-glycidyl phenyl trisiloxane
Solvent Content Solvent-free

Wide Range of Applications

  • Epoxy Resin Systems: Electronic encapsulants, structural adhesives, composite materials, coatings

  • Polyurethane Materials: Elastomers, adhesives, coatings, sealants

  • Polycarbonate Modification: Copolymer modification, processing aids, high-performance engineering plastics

  • Specialty Materials: Aerospace materials, atomic oxygen-resistant coatings, high-insulation components


Scientific Application Methods

For Epoxy Resin Modification

Add directly to the prepolymer to participate in the curing reaction. Recommended dosage: 5–15% by weight of the resin system.

For Polyurethane Modification

Can be used in synergy with amine chain extenders or react with isocyanate groups via acid ring-opening mechanisms to achieve intramolecular toughening.

For Polycarbonate Modification

Can be directly incorporated during polymerization as a comonomer or added as a reactive additive during processing and molding.


Safe Storage and Packaging Instructions

  • Packaging Specifications: 25 kg/drum, 200 kg/drum (internally coated iron drums)

  • Storage Requirements: Store sealed, avoid contact with moisture, oxidizers, and catalytic impurities

  • Shelf Life: 6 months under unopened conditions

  • Safety Notice: This product is non-hazardous but reactive. It is recommended to operate under professional guidance.

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