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Dow Corning PMX-200-1000CST is a high-viscosity dimethyl silicone oil in Dow Corning's PMX-200 series. Designed for industrial damping lubrication, electrical insulation, high-end polishing and personal care, it is a linear polydimethylsiloxane functional material with excellent thermal stability, high dielectric strength and low surface energy
High Viscosity & Stable Lubrication - High viscosity, excellent lubrication and damping effect, ensuring stable equipment operation
Wide Temperature Thermal Stability - Broad high and low temperature resistance, stable performance without attenuation under extreme temperatures
Excellent Electrical Insulation - High dielectric strength, suitable for insulation protection of precision electronic and electrical systems
Low Surface Energy - Low surface energy and good spreadability, improving polishing and hydrophobic effects
Industrial Damping Field - Used as damping oil for instruments and machinery to buffer vibration and impact, ensuring smooth operation
High-End Polishing Field - Core component of automotive, furniture and metal polishes, improving gloss and smoothness
Electrical Insulation Field - Insulating oil for precision electronic components and transformers, ensuring electrical system safety
Personal Care Field - Cosmetic additive, endowing skin with soft and velvety touch, optimizing product user experience
| Brand | Dow Corning |
| Chemical Name | Dimethyl Silicone Oil (Linear Polydimethylsiloxane) |
| English Alias | Dimethyl Silicone Fluid |
| CAS No. | 63148-62-9 |
| Active Ingredient | 60 - 100 % |
| Viscosity (25℃) | 1000 cSt |
| Specific Gravity (25℃) | 0.970 |
| Refractive Index (25℃) | 1.403 |
| Viscosity-Temperature Coefficient | 0.6 |
Q1: What is the primary functional role of PMX-200-1000CST in industrial formulations?
A: PMX-200-1000CST is a high-viscosity, linear polydimethylsiloxane fluid primarily used as a lubricant, release agent, or viscosity modifier in specialty coatings, sealants, adhesives, and personal care emulsions. Its inertness and thermal stability support performance in demanding processing conditions.
Q2: Is PMX-200-1000CST compatible with common organic solvents and polymer systems?
A: Yes — it exhibits good miscibility with hydrocarbon solvents, chlorinated solvents, and many silicone-based polymers. Compatibility with polar resins or water-based systems may require evaluation via formulation testing, as performance depends on specific matrix composition and shear history.
Q3: How does temperature affect the handling and application behavior of this silicone oil?
A: As a 1000 cSt fluid at 25°C, PMX-200-1000CST maintains consistent rheology across typical industrial processing temperatures (–40°C to +150°C). Viscosity decreases gradually with rising temperature, facilitating pumping and mixing; no significant volatility or degradation occurs below 200°C under inert conditions.
Q4: Can PMX-200-1000CST be used in applications requiring regulatory compliance for indirect food contact or cosmetics?
A: This grade is manufactured to meet general-purpose industrial specifications and is not pre-certified for food-contact or cosmetic use. For regulated applications, customers should consult Dow’s regulatory documentation and conduct appropriate safety and compliance assessments per their jurisdiction and end-use requirements.
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