Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

DOW SILASTIC 9204-20 LSR Defoamer

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.

Product Information of DOW SILASTIC 9204-20 LSR Defoamer

  1. Process Suitability: Stays stable in 200°C vulcanization, suitable for continuous LSR injection molding.

  2. Nanoscale Distribution: Silicone particles spread uniformly (D50≤5 μm) to avoid surface defects.

  3. Chemical Stability: Works with platinum catalysts and peroxide curing systems.

  4. Food-Grade Compliance: Meets FDA 21 CFR 177.2600 standards for medical-grade silicone products.

  5. Low VOC Output: Volatile content <50 ppm, conforming to EU REACH Annex XVII.

Areas of Application of DOW SILASTIC 9204-20 LSR Defoamer

  1. Automotive Seals: Gets rid of microvoids in rubber parts vulcanized at 180-200°C.

  2. Precision Molding: Improves surface finish of LSR phone buttons and baby nipples.

  3. Medical Devices: Controls bubbles in FDA Class VI catheter coating processes.

  4. Electronic Potting: Eliminates air gaps in high-thermal-conductivity epoxy resins.

  5. Aerospace Sealants: Provides degassing treatment for materials resistant to -60°C to 250°C.

Specifications Of DOW SILASTIC 9204-20 LSR Defoamer

Appearance
Transparent to pale-yellow liquid
Active Content
Polydimethylsiloxane + hydrophobic silica (100%


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