DOW SILASTIC 9204-20 LSR is a 100% active silicone defoamer made for liquid silicone rubber (LSR) systems. It is a transparent liquid (1,500-3,000 mPa·s viscosity) that performs stably at ≤200°C and pH 3-12, enabling quick bubble suppression in high-temperature vulcanization and precision molding. Certified by ISO 9001 and REACH, it cuts porosity by 45% at 0.1-0.5% dosage compared to mineral oil-based defoamers.
Process Suitability: Stays stable in 200°C vulcanization, suitable for continuous LSR injection molding.
Nanoscale Distribution: Silicone particles spread uniformly (D50≤5 μm) to avoid surface defects.
Chemical Stability: Works with platinum catalysts and peroxide curing systems.
Food-Grade Compliance: Meets FDA 21 CFR 177.2600 standards for medical-grade silicone products.
Low VOC Output: Volatile content <50 ppm, conforming to EU REACH Annex XVII.
Automotive Seals: Gets rid of microvoids in rubber parts vulcanized at 180-200°C.
Precision Molding: Improves surface finish of LSR phone buttons and baby nipples.
Medical Devices: Controls bubbles in FDA Class VI catheter coating processes.
Electronic Potting: Eliminates air gaps in high-thermal-conductivity epoxy resins.
Aerospace Sealants: Provides degassing treatment for materials resistant to -60°C to 250°C.
Appearance | Transparent to pale-yellow liquid |
Active Content | Polydimethylsiloxane + hydrophobic silica (100% |
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