IOTA208 methyl phenyl vinyl silicone resin is a high-performance material synthesized through the hydrolysis and equilibration of tetraethyl orthosilicate (TEOS), hexamethyldisiloxane, divinyltetramethyldisiloxane, and phenyl silane. It is primarily used in the preparation of high-refractive-index transparent reinforced phenyl liquid silicone rubber, silicone pressure-sensitive adhesives, and silicone inks for screen printing. With a molar mass typically ranging from 100 to 8000 g/mol, the properties and applications of this resin are determined by the ratio of M to Q chain units, phenyl content, and the specific structure of the M units.

Technical Specifications:

• Appearance: Colorless transparent liquid

• Resin content: ≥ 99.9%

• Viscosity: 1000–20,000 mPa·s

• Vinyl content: 0.5–5.0%

• Refractive index: 1.53

Usage:
The resin can be directly diluted with silicone oil and uniformly dispersed or used as is without further modification.

Applications:

1. Surface Treatment Agent:
   Used for silicone pressure-sensitive adhesives, mobile device keypads, and surface treatment of epoxy-based adhesives.

2. Reinforcing Filler:
   Applicable in RTV and HTV rubbers, addition-curable liquid silicone rubber, heat-curable silicone rubber compounds, and shell-free encapsulation of semiconductor components.

3. Adhesive:
   Ideal for construction sealants and organic resin coatings.

4. Other Additives:
   Used in formulating release agents, defoamers, anti-adhesive agents, gloss enhancers, and as a peel force modifier for addition-curable release agents.

This versatile resin combines excellent optical properties, flexible processability, and broad compatibility, making it a critical material in industries ranging from electronics and semiconductors to construction and specialty chemicals.