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High-purity, solvent-free silicone resin in solid pellet form for consistent handling and processing.
Excellent thermal stability with continuous use temperature up to 200 °C.
Provides superior hardness, abrasion resistance, and surface gloss when formulated into coatings and inks.
Compatible with organic resins (e.g., acrylics, polyesters) and silicone polymers for hybrid system design.
Low volatility and minimal extractables—meets stringent requirements for electronics encapsulation and medical device coatings.
High-performance release coatings for PET, paper, and film substrates.
Heat-resistant topcoats for automotive trim, cookware, and industrial appliances.
Reinforcing filler and binder in silicone rubber compounds requiring enhanced modulus and compression set resistance.
Key component in LED encapsulants and optical adhesives demanding UV stability and refractive index control.
| Chemical Type | Methyl/Phenyl Silica Resin (MQ-type) |
| Product Form | Free-flowing white pellets |
| Appearance | White to off-white solid, homogeneous granules |
| Softening Point (ASTM E28) | 55–65 °C |
| Volatile Content (150 °C, 2 hrs) | <1.5 wt% |
| Resin Solubility | Soluble in aromatic hydrocarbons, ketones, and esters; insoluble in water and aliphatic hydrocarbons |
| Key Features | Thermoplastic behavior, low melt viscosity, high SiO₂ content (~55–60 wt%) |
| Primary Applications | Release coatings, heat-resistant finishes, silicone rubber reinforcement, optical encapsulants |
Q1: What is the primary function of DOWSIL MQ-1600 in silicone formulations?
A: DOWSIL MQ-1600 is a silicone solid resin designed to enhance thermal stability, improve mechanical strength, and increase hardness in high-performance silicone elastomers and gels. It functions as a reinforcing filler that contributes to dimensional stability and resistance to compression set.
Q2: How is DOWSIL MQ-1600 typically incorporated into silicone systems?
A: It is commonly added during the high-shear mixing stage of silicone compound preparation—either before or after base polymer addition—depending on the specific processing equipment and formulation goals. Good dispersion is essential, and extended mixing may be required to achieve uniform distribution without agglomeration.
Q3: Is DOWSIL MQ-1600 compatible with both platinum-cured and peroxide-cured silicone systems?
A: Yes, DOWSIL MQ-1600 demonstrates broad compatibility with both platinum-catalyzed addition-cure and peroxide-initiated free-radical cure systems. However, its impact on cure kinetics and final properties should be evaluated case-by-case, particularly in highly sensitive platinum formulations where trace impurities could affect inhibition.
Q4: What handling precautions should be observed when working with this material?
A: As a fine, free-flowing solid, DOWSIL MQ-1600 should be handled in well-ventilated areas to minimize inhalation of dust. Use appropriate personal protective equipment—including gloves and respiratory protection during bulk transfer or dispersion—to avoid skin contact and airborne exposure. Store in a cool, dry location away from moisture and strong oxidizers.
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