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Dow DOWSIL 1349 is an electronic-grade high-purity polydimethylsiloxane fluid in the DOWSIL series, designed for electronic insulation & heat dissipation, medical device lubrication, cosmetic skin feel formulation and precision instrument damping scenarios. It features ultra-high purity,
Ultra-High Purity Quality - Low volatiles and impurities, suitable for electronic and medical precision scenarios
Wide Temperature Stability - Long-term stable from -40℃ to 200℃, resistant to extreme working conditions
Excellent Dielectric Insulation - High insulation strength, ensuring safe operation of electronic components
Good Biocompatibility - Meets pharmaceutical/cosmetic grade compliance requirements for safer application
Electronic & Electrical Field - Circuit board protective coating, insulation and heat dissipation medium for electronic components
Medical Device Field - Lubrication and protection for precision instruments, suitable for biocompatibility verification scenarios
Cosmetic Field - Slip agent for skin care and makeup, optimizing skin feel and spreading performance
Precision Instrument Field - Instrument damping oil for stable buffering, shock absorption and noise reduction
| Brand | DOW |
| Chemical Composition | High-Purity Polydimethylsiloxane (PDMS) |
| Appearance | Colorless, Transparent and Odorless Liquid |
| Viscosity (25℃) | 1000 cSt |
| Density (25℃) | 0.973 g/cm³ |
| Flash Point (COC) | > 315 ℃ |
| Refractive Index (25℃) | 1.403 |
| Volatiles (24 h / 150 ℃) | < 0.1 % |
| Dielectric Strength | > 15 kV/mm |
Q1: What is the primary function of DOWSIL 1349 Silicone Oil in industrial formulations?
A: DOWSIL 1349 Silicone Oil is primarily used as a surface modifier and processing aid to improve slip, leveling, and substrate wetting in coatings, inks, adhesives, and sealants. It helps reduce surface tension without significantly affecting cure chemistry or film integrity.
Q2: Is DOWSIL 1349 Silicone Oil compatible with common polymer systems such as acrylics, polyurethanes, and epoxies?
A: Yes, DOWSIL 1349 Silicone Oil demonstrates broad compatibility with solvent-based, waterborne, and UV-curable systems including acrylics, polyurethanes, and epoxies. Compatibility should be verified in the final formulation due to potential sensitivity to catalysts or surfactants.
Q3: How should DOWSIL 1349 Silicone Oil be incorporated into a formulation to avoid surface defects?
A: It is recommended to add DOWSIL 1349 Silicone Oil during the let-down stage under moderate agitation. Pre-dilution in a compatible carrier solvent may help ensure uniform dispersion and minimize risks of craters or haze. Avoid over-addition, as excessive levels can lead to intercoat adhesion issues.
Q4: Does DOWSIL 1349 Silicone Oil contribute to foam generation or stabilization in aqueous systems?
A: DOWSIL 1349 Silicone Oil is not designed as a defoamer or antifoam agent and may, in some cases, stabilize foam if introduced without proper dispersion control. When used in waterborne systems, it is advisable to evaluate foam behavior alongside standard defoaming agents if required.
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E-mail: wangxingqiang@ericwchem.com
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