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High-performance silicone elastomer blend offering excellent thermal stability across -60 °C to 200 °C.
Low compression set for long-term sealing integrity in dynamic and static applications.
Good adhesion to common substrates including metals, plastics, and coated surfaces without primer.
Ready-to-use two-part system with balanced pot life and rapid room-temperature cure profile.
Meets UL 94 HB flammability rating and complies with RoHS and REACH requirements.
Automotive gasketing and vibration-damping components for engine compartments.
Electrical insulation and encapsulation of power electronics and EV battery modules.
Sealing solutions for HVAC systems requiring resistance to refrigerants and thermal cycling.
Medical device housings and wearable sensor interfaces requiring biocompatibility support.
Industrial equipment seals exposed to ozone, UV radiation, and weathering conditions.
| Chemical Type | Platinum-cured addition-cure silicone elastomer blend |
| Product Form | Two-component liquid (Part A + Part B) |
| Appearance | Translucent, low-viscosity liquid (Part A); translucent, low-viscosity liquid (Part B) |
| Primary Applications | Gasketing, sealing, encapsulation, and damping |
| Key Features | Thermal stability, low compression set, substrate adhesion, fast RT cure |
| Benefits | Reduced assembly time, extended service life, simplified processing |
| Cure Mechanism | Platinum-catalyzed hydrosilylation reaction |
| Regulatory Compliance | RoHS 2011/65/EU, REACH SVHC-free, UL 94 HB |
Q1: What is the primary function of DOWSIL 9011 in silicone elastomer formulations?
A: DOWSIL 9011 is a pre-blended silicone elastomer system designed to enhance processability and improve surface quality in high-consistency rubber (HCR) and liquid silicone rubber (LSR) compounds. It functions as a processing aid and softening modifier, helping to reduce compound viscosity during mixing and molding while maintaining good mechanical integrity in the cured part.
Q2: Is DOWSIL 9011 compatible with both platinum-cured and peroxide-cured silicone systems?
A: Yes, DOWSIL 9011 is formulated for broad compatibility across common silicone curing chemistries, including both platinum-catalyzed addition-cure and peroxide-initiated free-radical cure systems. Compatibility should always be verified under actual processing conditions, especially when high levels of inhibitors or accelerators are present.
Q3: How is DOWSIL 9011 typically incorporated into silicone formulations?
A: DOWSIL 9011 is generally added during the base polymer mixing stage—either before or after filler incorporation—using standard two-roll mills or internal mixers. It disperses readily due to its pre-compounded nature, and typical dosage depends on formulation requirements but generally ranges from 0.1% to 2% by weight relative to the total elastomer mass.
Q4: Does DOWSIL 9011 affect the thermal stability or compression set performance of cured silicone parts?
A: When used within recommended dosage ranges, DOWSIL 9011 maintains the inherent thermal stability of the base silicone system and does not significantly compromise long-term compression set resistance. However, excessive loading may influence crosslink density and should be evaluated through application-specific aging tests.
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E-mail: wangxingqiang@ericwchem.com
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