Phenyldimethylmethoxysilane - Functional Phenyl Terminator for Silicone Oil Synthesis & High-Temperature Silicone Resin Preparation ChangFu® PH12

As high-end coatings, optoelectronics, high-temperature insulation, new energy electronics and other industries keep developing, the demand for premium formulation raw materials featuring outstanding heat resistance, high refractive index and superior compatibility continue to rise. ChangFu Chemical presents ChangFu^® PH12 (Phenyldimethylmethoxysilane, CAS: 17881-88-8). This product carries phenyl groups in its molecular structure with controllable hydrolysis activity and excellent thermal resistance. Serving as a core raw material to upgrade the performance of silicone materials, it acts as a dedicated functional terminator for the synthesis of silicone resins and phenyl silicone oils.

Product Advantages

Compared with conventional methyl terminators, termination with ChangFu^® PH12 can directly introduce phenyl structures at the terminals of polysiloxane molecular chains. It effectively improves thermal stability, anti-aging performance and refractive index of end products, and strengthens compatibility with aromatic resins and inorganic fillers. It fits various high-end formulation systems including high-temperature insulating resins, optical silicones and heat-resistant coatings.

Product Features

Monomethoxy structure:

This product possesses only one hydrolyzable methoxy group in its molecular structure. Benefiting from moderately‑controllable hydrolysis rate and selective reactivity, it effectively restrains uncontrolled cross‑linking reactions, so as to avoid excessive crosslinking during polymerization. It serves as an ideal monofunctional capping agent for silicone resin synthesis, helping to regulate molecular weight and optimize the final polymer molecular architecture.

Excellent heat resistance and compatibility:

This product possesses only one hydrolyzable methoxy group in its molecular structure. Benefiting from moderately‑controllable hydrolysis rate and selective reactivity, it effectively restrains uncontrolled cross‑linking reactions, so as to avoid excessive crosslinking during polymerization. It serves as an ideal monofunctional capping agent for silicone resin synthesis, helping to regulate molecular weight and optimize the final polymer molecular architecture.

Excellent surface modification capability:

It is applicable for surface modification of diverse inorganic substrates and mineral fillers. After modification, the interfacial compatibility is remarkably improved. When applied in coating formulations, it can endow finished coatings with outstanding hydrophobic, moisture‑proof and water‑repellent performances, which helps reduce water permeation and elevate the long‑term environmental durability of coating films.

Product Applications

Terminator for phenyl silicone oils & silicone resins：

Terminal phenyl modification significantly raises the temperature resistance grade, high-temperature anti-yellowing property and weathering resistance of silicone products, alongside higher refractive index and light transmittance. Widely applied in high-temperature resistant coatings, insulating encapsulation of electronic components, optical lens encapsulation, LED potting, precision instrument lubrication and other high-end sectors.

Surface modifier for inorganic powders and substrates：

Suitable for hydrophobic surface modification of glass, ceramics, metal substrates, talcum powder, fumed silica and other mineral fillers. It improves filler dispersibility and reduces water absorption of the system, endowing coatings and composite materials with favorable moisture-proof hydrophobicity, corrosion resistance and wear resistance.

Intermediate for advanced fine organic synthesis：

With stable and controllable reactivity and unique phenyl-substituted molecular structure, it works as a key synthetic intermediate for manufacturing diverse functional silicone polymers, silane surfactants and special additives, supplying high-quality raw materials for fine chemical and advanced new material industries.

Selection Reference

ChangFu^® DPH12 (Methyldiphenylmethoxysilane, CAS: 18407-48-2) can also be used as a terminator for silicone polymers. It owns higher phenyl content and suits formulations with stricter requirements on heat resistance and refractive index.

Note: Practical application results depend on actual working conditions. Feel free to contact our technical team for further product information and technical support.

For more product documents and application details, please contact us:

Mobile: (+86)181-6277-0058

E-mail: sales@cfsilanes.com

Key words: Phenyldimethylmethoxysilane; CAS: 17881-88-8; Terminator; Silicone Oil Synthesis; High-Temperature Silicone Resin.