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Engineered for excellent thermal stability across a wide operating temperature range (–60 °C to +200 °C).
Offers superior compression set resistance, maintaining shape and sealing performance under prolonged stress.
Provides outstanding electrical insulation properties with low dielectric loss and high volume resistivity.
Exhibits excellent compatibility with common engineering plastics and substrates for reliable bonding and overmolding.
Formulated for rapid room-temperature or heat-assisted cure without requiring post-cure, enhancing manufacturing efficiency.
Automotive sensor encapsulation and protective grommets.
Electrical and electronic component potting and sealing in power modules and connectors.
Medical device housings and biocompatible interface seals (ISO 10993 tested).
Industrial control system gaskets and vibration-damping mounts.
Consumer electronics waterproofing and shock-absorbing interfaces.
| Chemical Type | Platinum-cured silicone elastomer blend |
| Product Form | Two-component liquid (Part A + Part B) |
| Appearance | Translucent, low-viscosity liquid |
| Primary Applications | Encapsulation, sealing, gasketing, and overmolding |
| Key Features | Low compression set, high thermal stability, excellent electrical insulation |
| Shore A Hardness (Cured, 7 days @ 23 °C) | 45 ± 3 |
| Tensile Strength (ASTM D412) | 8.5 MPa typical |
| Volume Resistivity (ASTM D257) | >1 × 10¹⁴ Ω·cm |
Q1: What is the primary function of DOWSIL 9041 in silicone rubber formulations?
A: DOWSIL 9041 is a pre-blended silicone elastomer system designed to enhance processing efficiency and improve surface quality in high-consistency rubber (HCR) compounds. It typically functions as a process aid and surface modifier, helping to reduce mixing viscosity, improve filler dispersion, and yield smoother, more uniform cured parts.
Q2: Is DOWSIL 9041 compatible with platinum-cured and peroxide-cured HCR systems?
A: Yes, DOWSIL 9041 is formulated for broad compatibility with both platinum-catalyzed and peroxide-cured high-consistency silicone rubber systems. It does not contain known inhibitors or contaminants that interfere with platinum catalysis under standard processing conditions.
Q3: How is DOWSIL 9041 typically incorporated into HCR batches?
A: It is generally added during the final mixing stage—after base polymer, fillers, and curatives—to ensure optimal dispersion without compromising cure kinetics. Incorporation is most effective using standard two-roll mills or internal mixers, and dosage depends on formulation requirements but typically ranges from 0.1% to 2% by weight relative to total batch mass.
Q4: Does DOWSIL 9041 affect the mechanical properties of the final cured rubber?
A: When used within recommended dosage levels, DOWSIL 9041 generally maintains key mechanical performance characteristics—including tensile strength, elongation, and compression set—while improving surface aesthetics and process consistency. Significant deviations from typical usage levels may influence crosslink density and should be evaluated case by case.
Contact With Us:
E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
