In the epoxy-modified siloxane and epoxy resin dilution/modification spectrum, traditional epoxy modification paths often face pain points such as complex processes, high energy consumption, excessive by-products, and difficulty in precisely controlling molecular weight distribution. As a capping agent, low purity, mono-end activity, or excessive side reactions lead to low capping efficiency, making it difficult to synthesize structurally regular epoxy-terminated polysiloxanes. In the field of epoxy resin dilution, while conventional diluents reduce viscosity, they often sacrifice the mechanical properties of the final cured product or introduce volatile organic compounds. The epoxy double-capping agent (dual-end epoxy capping agent) precisely introduces epoxy groups at both ends of the molecular chain, serving both as an "active capping terminator" for synthesizing epoxy-terminated polysiloxanes and as a high-efficiency diluent/modifier for epoxy resins. However, products with high purity, narrow distribution, and dual-end equimolar activity have long relied on imports, and the environmental friendliness (no solid waste, low energy consumption) of the synthesis process is a key proposition for localization. With surging demand for "epoxy-siloxane hybrid materials" in 5G communications, electronic packaging, and high-performance composites, sourcing an epoxy capping agent with "content >96%, main peak ≥96%, precise MW 362.6, dual-end epoxy, simple process, no solid waste" has become the core proposition in the field of epoxy-modified silicones. Addressing this "double-seal" pain point, Anhui IOTA Silicone Oil Co., Ltd. (IOTA) officially launches Epoxy Capping Agent IOTA 010 (Chemical Name: 1,3-Diglycidyloxy propyl-1,1,3,3-tetramethyldisiloxane; Alias: Epoxy double capping agent, 1,3-bis(3-glycidyloxypropyl)-1,1,3,3-tetramethyldisiloxane; CAS 126-80-7). Characterized by "colorless or slightly pale yellow transparent liquid, content >96% (main peak ≥96%), MW 362.6, density 0.995 (20℃), refractive index 1.4475-1.4505 (25℃), boiling point 185℃ (2mmHg), 25kg plastic drum / 200kg iron drum packaging", and backed by "dual-end glycidyloxy + tetramethyldisiloxane center + high-purity precise capping", it serves as the "double-seal modification" for epoxy-terminated polysiloxane synthesis and epoxy resin dilution modification. Molecular Architecture: Dual-End Glycidyl Ether Oxy + Tetramethyldisiloxane Flexible Bone + High-Purity Precise MW 3D Logic The core competitiveness of IOTA 010 stems from its "high activity of epoxy at both ends + flexible siloxane center backbone + electronic-grade high-purity monodispersity" precise architecture:

• Dual-End Epoxy Groups (-CH₂(O)CHCH₂): Each end of the molecular chain has a glycidyl ether oxy group. The dual-end equimolar high-activity epoxy groups can simultaneously participate in ring-opening reactions. As a capping agent, it precisely "seals" both ends of the siloxane chain to synthesize structurally regular epoxy-terminated polysiloxanes. As a modifier, it provides dual anchoring points to form interpenetrating networks with the epoxy matrix.
• Tetramethyldisiloxane Center: Two silicon atoms each carry two methyl groups. The central Si-O-Si bond provides molecular flexibility and thermal stability. The introduction of the siloxane skeleton imparts low surface energy, weather resistance, and dielectric properties to the final material.
• High-Purity Precise MW 362.6: Content >96% (main peak ≥96%) ensures accurate reaction stoichiometry and excellent batch-to-batch consistency, avoiding crosslinking side reactions or incomplete capping caused by low-purity impurities.

Performance Leap: From "Complex Process / Dilution-Induced Property Loss" to "Double-Seal Precise Synergy" Incorporating IOTA 010 enables qualitative leaps:

• Epoxy-Terminated Polysiloxane Synthesis: Simple process, easy operation, low energy consumption, low material consumption, and no solid waste — a green synthesis path aligned with high-end manufacturing environmental requirements.
• Epoxy Resin Dilution & Modification: As a reactive diluent to reduce epoxy system viscosity, while dual-end epoxy participates in curing crosslinking without sacrificing final cured mechanical properties. Instead, the introduction of siloxane segments enhances toughness and thermal shock resistance.
• Double-Seal Efficiency: Dual-end simultaneous reaction with high capping rate and controllable product structure, suitable for high-end applications with strict requirements on molecular weight distribution.
• Stable Physical Properties: Density 0.995 (20℃), refractive index 1.4475-1.4505 (25℃), boiling point 185℃ (2mmHg) — facilitating process parameter setting and process control.

Application Penetration: From Epoxy-Terminated Polysiloxane to Electronic Packaging The application boundaries of IOTA 010 cover multiple high-end fields demanding "epoxy-siloxane hybridization":

• Epoxy-Terminated Polysiloxane Synthesis: Used to prepare terminal epoxy silicone oils as epoxy resin modifiers or silicone-epoxy copolymer intermediates.
• Epoxy Resin Dilution & Modification: Reducing viscosity and enhancing flexibility in coatings, potting compounds, composite prepregs, and other epoxy systems.
• Electronic Packaging: Semiconductor device packaging materials, LED encapsulants — utilizing epoxy-siloxane hybrid structure to balance hardness and toughness.
• High-Performance Composites: Interface modification of epoxy-based composites for aerospace and new energy battery components.

IOTA Technical Guide: Sealed at Room Temp, Avoid Extreme Temps, Double-Seal Precision

• Synthesis Application: As a capping agent in siloxane ring-opening polymerization or condensation reactions. Add according to stoichiometric ratio. Simple process, no special equipment needed.
• Dilution Modification: Directly add to epoxy resin system, stir evenly, and proceed with conventional epoxy curing process.
• Taboo Red Line: Store sealed at room temperature. Avoid prolonged exposure to high heat or freezing cold — high temperatures may cause self-polymerization or degradation; extreme cold may affect flowability and seal integrity.
• Storage: 25kg plastic drum and 200kg iron drum packaging; store sealed at room temperature; handle as general chemical, routine PPE.

Industry Expert Insight: Industry experts note that over the past five years, China has achieved systematic breakthroughs in dual-end functional siloxane synthesis, epoxy-siloxane hybrid design, and green zero-solid-waste processes. The mechanism of high-purity epoxy double-capping agents in "precise capping - hybrid enhancement" has been deeply elucidated. Domestic epoxy capping agents are entering industrialization acceleration in electronic packaging, high-performance composites, and other fields. IOTA 010, with "content >96% + main peak ≥96% + MW 362.6 + dual-end epoxy zero-solid-waste synthesis" hard metrics, fills the key supply chain link for domestic epoxy capping agents in the epoxy-siloxane hybrid process field, providing a mass-producible import-substitution solution for downstream epoxy modification enterprises. This confirms domestic epoxy-modified silicones are leaping along "traditional mono-end capping → high-purity dual-end precise capping (double-seal)" — a dual leap in process precision, with continuously growing technical say in epoxy-siloxane hybrid critical materials.