Features Of Dow Corning OFS-6778 Methyl Silicate Coupling Agent
Deep Penetration - Small molecular structure ensures thorough substrate infiltration for durable waterproofing
Interfacial Bonding - Siloxane crosslinks bridge organic resins (epoxy, acrylic) and inorganic substrates (concrete, metals)
Process Efficiency - Lowers viscosity (40% aqueous solution, dilutable to 3%) for easy application
Multi-Substrate Compatibility - Effective on concrete, metals, and polyolefins
Typical Applications Of Dow Corning OFS-6778 Methyl Silicate Coupling Agent
Infrastructure Protection - Waterproofing for bridges/highways with >1,000-hour salt spray resistance
Metal Anti-Corrosion - Aluminum/steel coatings with extended service life
Polymer Composites - Mineral filler modification for improved dispersibility in polyolefin
Specifications Of Dow Corning OFS-6778 Methyl Silicate Coupling Agent
Chemical Name | Silane Coupling Agent |
Appearance | Transparent |
Specific Gravity (25℃) | 1.29 |
Flash Point (Closed Cup) | >93.8℃ |
Total Solid Content | 40-45% |
pH Value | 13 |
Solvent | Water |
Packaging | 20KG/drum |
Dow Corning OFS-6778 Methyl Silicate Coupling Agent – Frequently Asked Questions (FAQ)
Q1: What is the primary function of OFS-6778 in composite formulations?
A: OFS-6778 acts as a silane coupling agent that enhances interfacial adhesion between inorganic fillers (e.g., silica, glass, or metal oxides) and organic polymer matrices—improving mechanical strength, moisture resistance, and long-term durability of composites.
Q2: How is OFS-6778 typically incorporated into a formulation?
A: It is commonly added directly to the resin phase or pre-mixed with the filler surface via solution or neat application. Hydrolysis may occur upon contact with ambient moisture, so processing conditions should be controlled to optimize coupling efficiency without premature condensation.
Q3: Is OFS-6778 compatible with common thermoset resins such as epoxy, phenolic, and polyester systems?
A: Yes, OFS-6778 demonstrates broad compatibility with standard thermosetting resins and is frequently used in high-performance molding compounds, encapsulants, and laminating systems where enhanced filler–matrix bonding is required.
Q4: Does OFS-6778 require special handling or storage precautions?
A: As a reactive methyl silicate, it should be stored in a cool, dry place under inert atmosphere or tightly sealed containers to minimize exposure to humidity. Prolonged contact with water or high relative humidity may lead to viscosity increase or gelation over time.
English
Español
tiếng việt
русский
