PUCONS Polymethylphenylsiloxane High-Temp Thermal Fluid 25-500 cSt
Product Properties
| Property | Specification | Test Method |
| Chemical Name | Polymethylphenylsiloxane | IUPAC Nomenclature |
| Viscosity Range | 25–500 cSt (at 25°C) | ASTM D445 |
| Appearance | Colorless to pale yellow liquid | Visual Inspection |
| Refractive Index | 1.46–1.48 | ASTM D1218 |
| Density (g/cm³) | 1.00–1.10 | ASTM D1475 |
| Flash Point (°C) | >220 | ASTM D93 |
| Molecular Weight | ~3,000–15,000 g/mol | GPC |
| Phenyl Content | 20–40 mol% | NMR |
| Thermal Stability | -60°C to +250°C | TGA/DSC |
Product Introduction
Polymethylphenylphenylsiloxane (25–500 cSt) is a methyl-phenyl co-modified silicone polymer combining the flexibility of polydimethylsiloxane (PDMS) with the thermal resistance and optical properties of phenylsiloxanes. Its unique molecular structure (phenyl substituents on the Si-O backbone) significantly enhances oxidation resistance and high-temperature stability while maintaining low-temperature flexibility. Solvent-free and meeting electronic-grade purity standards, it is suitable for precision industrial applications.
Enhanced Properties
Enhanced Thermal & Optical Performance
The phenyl groups elevate the glass transition temperature (Tg) to approximately **–80°C (vs. –127°C for PDMS), significantly broadening the operational temperature range (–50°C to 250°C). Concurrently, the refractive index increases to 1.46–1.48** (vs. 1.40 for PDMS), making it ideal for optical applications requiring transparency and light management.
Superior Viscoelastic Behavior
Low-molecular-weight variants (e.g., 25–100 cSt) exhibit thermorheological simplicity: viscosity-temperature dependence follows a single activation energy, enabling predictable performance in coatings and lubricants
Higher viscosities (200–500 cSt) demonstrate reduced chain entanglement, resulting in lower shear-thinning and enhanced flow stability under stress
Application Scenarios
- High-Temperature Lubricants
Automotive and aerospace systems requiring stability >200°C - Optical Encapsulants
LED and display components demanding high refractive index and UV resistance - Polymer Modification
Additive for enhancing thermal stability of plastics (e.g., PMMA, PC) - Cosmetics & Personal Care
High-end foundations and sunscreens leveraging its non-greasy texture and SPF-boosting properties
FAQ
1. Who are we?
We are Shenzhen Huazhisheng New Material Technology Co., Ltd., a professional industrial adhesives and sealants supplier based in China since 2018. we serve global markets: Mainland China (60%), Southeast Asia (20%), North America (10%), and Europe (10%).
2. What products do you offer?
we supply high-performance adhesives and sealants from global leaders including:
Cemedine, Dow Corning, Shin-Etsu, Araldite, and Momentive,etc.
3. How do you guarantee product quality?
Quality assurance through:
Mandatory pre-production samples approval
Final inspection by QC team before shipment
International certifications: SGS, UL, FDA, RoHS, REACH
4. Why choose us over other suppliers?
Reliable Supply:Authentic products from top manufacturers
Expert Support:Technical guidance for product selection
Global Compliance:Certifications meeting target market standards
Efficient Service:Customized solutions & professional support
5. What services do you provide?
Delivery:EXW/FOB/CIF
Payment:USD/EUR/CNY/HKD via T/T, L/C
Support:Tech
nical consultation & logistics coordination
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Polymethylphenylsiloxane High Temperature Thermal Fluid 25-500 CSt PUCONS Images
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