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Dow Corning XIAMETER PMX 1503 is a silicone additive specifically for personal care in Dow Corning's XIAMETER series. Designed for formulas of skin care, color cosmetics, sunscreen and cleansing products, it is a customized blend of 12% ultra-high molecular weight polydimethylsiloxanol and low viscosity polydimethylsiloxane
Ultra-Low Viscosity & Easy Flow - Excellent fluidity, rapid wetting and spreading
High Thermal & Chemical Stability - Temperature and oxidation resistance, suitable for harsh working conditions
Efficient Defoaming & Antifoaming - Rapid bubble breaking, long-lasting foam inhibition
Low Surface Tension - Improved wetting and spreading performance, suitable for precision scenarios
Volatile & Residue-Free - Rapid volatilization at room temperature, clean surface without residue
Industrial Lubrication - Low-friction long-lasting lubrication for precision mechanical parts
Efficient Defoaming - Rapid defoaming in chemical, coating and daily chemical systems
Electronic Cleaning - Residue-free cleaning and protection for precision electronic components
Personal Care Raw Material - Skin feel and spreading optimization for cosmetics and toiletries
Release Assistance - Efficient release for rubber and plastic molding, improving production efficiency
| Brand | Dow |
| Chemical Composition | Hexamethyldisiloxane (≥ 89.0 %) |
| INCI Name | Hexamethyldisiloxane |
| Appearance | Colorless transparent liquid |
| Viscosity (25℃) | 0.65 mm²/s |
| Flash Point (Closed Cup) | -1 ℃ |
| Specific Gravity (25℃) | 0.65 - 0.67 |
| Refractive Index (25℃) | 1.373 - 1.375 |
| Surface Tension (25℃) | 15.9 mN/m |
Q1: What is the primary function of XIAMETER PMX 1503 in formulations?
A: XIAMETER PMX 1503 is a low-viscosity, reactive silicone fluid designed primarily as a surface modifier and release aid. It imparts slip, mar resistance, and improved substrate wetting in coatings, inks, adhesives, and sealants—without significantly affecting cure chemistry or film integrity.
Q2: Is PMX 1503 compatible with common polymer systems such as acrylics, polyurethanes, and epoxies?
A: Yes, PMX 1503 exhibits broad compatibility with thermoset and thermoplastic resin systems, including acrylics, polyurethanes, and epoxy-based formulations. Its reactive silane functionality allows for covalent integration into many crosslinking networks, enhancing permanence of surface effects.
Q3: How should PMX 1503 be incorporated into a formulation to ensure optimal performance?
A: It is typically added during the let-down or post-additive stage under moderate agitation. Pre-dilution in a compatible solvent or carrier resin may improve dispersion. Avoid high-shear mixing that could prematurely hydrolyze the alkoxy silane groups, and allow sufficient time for surface migration prior to curing.
Q4: Does PMX 1503 require heat or catalysts to react in typical coating applications?
A: The alkoxy silane functionality in PMX 1503 undergoes moisture-catalyzed condensation at ambient conditions, though reaction rate increases with temperature and humidity. In thermally cured systems, it readily integrates during standard bake cycles without requiring additional catalysts.
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