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Low-creep, high-resilience silicone elastomer blend designed for long-term dimensional stability under compression.
Excellent thermal stability across a wide operating temperature range (–60 °C to 200 °C).
Good adhesion to common substrates including metals, plastics, and coated surfaces without primer.
Low volatility and minimal extractables—meets stringent requirements for medical device and food-contact applications.
Ready-to-use liquid consistency with adjustable cure profile via platinum-catalyzed addition curing.
Sealing and gasketing in automotive powertrain and EV battery modules.
Soft-touch overmolding for medical handheld devices and diagnostic equipment housings.
Vibration-damping mounts for precision industrial sensors and optical assemblies.
Encapsulation of sensitive electronics requiring low-stress, thermally stable protection.
Custom elastomeric components for aerospace interior panels and environmental seals.
| Chemical Type | Platinum-catalyzed addition-cure liquid silicone rubber (LSR) blend |
| Product Form | Two-part liquid system (Part A + Part B) |
| Appearance | Translucent, low-viscosity liquid |
| Primary Applications | Sealing, gasketing, damping, soft-touch overmolding |
| Key Features | Low creep, high rebound, thermal stability, primerless adhesion |
| Benefits | Reduced part deformation over time, extended service life, simplified processing |
| Cure Mechanism | Heat-activated platinum-catalyzed addition reaction |
| Shelf Life (Unopened) | 12 months at 25 °C in original sealed container |
Q1: What is the primary function of DOWSIL 9045 LC in silicone elastomer formulations?
A: DOWSIL 9045 LC is a liquid silicone elastomer blend designed to enhance processability and improve surface quality in high-consistency rubber (HCR) and liquid silicone rubber (LSR) systems. It functions as a reactive processing aid that supports efficient mixing, reduces viscosity during processing, and contributes to improved tear strength and elongation in the cured elastomer.
Q2: Is DOWSIL 9045 LC compatible with both platinum-cured and peroxide-cured silicone systems?
A: Yes, DOWSIL 9045 LC is formulated for broad compatibility with both platinum-catalyzed addition-cure and peroxide-initiated free-radical cure systems. Its balanced reactivity profile allows it to integrate effectively without significantly inhibiting cure kinetics or compromising final crosslink density in either system type.
Q3: How should DOWSIL 9045 LC be incorporated into a silicone elastomer compound?
A: It is typically added during the base polymer mixing stage—either before or alongside fillers and other additives—using standard high-shear mixers. Due to its low volatility and stable viscosity, it disperses readily and does not require special handling or pre-dilution under normal processing conditions.
Q4: Does DOWSIL 9045 LC affect the thermal stability or compression set performance of the final cured elastomer?
A: When properly compounded and fully cured, DOWSIL 9045 LC contributes to maintained thermal stability and generally supports improved compression set resistance compared to unmodified base elastomers—particularly in applications requiring long-term dynamic sealing performance at elevated temperatures.
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E-mail: wangxingqiang@ericwchem.com
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