POLY(METHYLSILSESQUIOXANE) Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 68554-70-1 |
| Product name | POLY(METHYLSILSESQUIOXANE) |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeMaterial GradeSpecialty GradeIndustrial GradeElectronic Grade |
| Packaging | 25KG/bag500KG/bag1000KG/bag |
| Sample | Test Samples Available (Click to Request Samples) |
| COA | View COA |
| Price | Get Quote |
| Supply Type | Bulk / Contract manufacturing / OEM |
| Shipping | FCL / LCL available |
| Payment Terms | Support FOB \ CIF \ EXW quotations, and accept Letter of Credit (L/C). |
| Manufacturer | Greenrock Chemical(China Factory) |
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Documents We Provide for POLY(METHYLSILSESQUIOXANE)
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk POLY(METHYLSILSESQUIOXANE) Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of POLY(METHYLSILSESQUIOXANE)
| Industry | Application | Process |
|---|---|---|
| Coatings & Paints | Preparation of heat-resistant and moisture-proof coatings | Used as a component of silicone resins for synthesizing high-temperature-resistant and waterproof coating materials |
| Electronics Industry | Encapsulation materials and electrical insulation protection | Applied as an insulating coating for semiconductors or electronic components to provide dielectric performance and thermal stability |
| Plastics & Composites | Modifying additive | Blended with polymers to enhance thermal stability, mechanical strength, and hydrophobicity |
| Aerospace | High-temperature protective materials | Used in manufacturing protective coatings or structural materials resistant to extreme temperature environments |
| Medical Devices | Biocompatible coatings | Modified for application on medical device surfaces to impart chemical inertness and anti-adhesion properties |
| Nanotechnology | Precursor for nanoporous materials | Processed via sol-gel methods to produce low-dielectric-constant materials or aerogels |
Manufacturing Quality Control of POLY(METHYLSILSESQUIOXANE)
| Detection Item | Common Testing Methods | Method Overview |
|---|---|---|
| Appearance and Color | Visual Inspection / Colorimetry | Place the sample in a transparent container and observe its color, clarity, and presence of impurities under natural light or standard illumination. Useful for assessing product purity and storage stability. |
| Molecular Structure Confirmation | Fourier Transform Infrared Spectroscopy (FT-IR) | Identify characteristic absorption peaks (e.g., Si–O–Si at ~1000–1100 cm⁻¹, Si–CH₃ at ~1270 cm⁻¹ and 800 cm⁻¹) to confirm the presence of methyl groups and siloxane backbone. |
| Chemical Composition Analysis | Nuclear Magnetic Resonance Spectroscopy (¹H NMR, ²⁹Si NMR) | ¹H NMR is used for quantitative determination of methyl group (–CH₃) content; ²⁹Si NMR distinguishes T⁰, T¹, T², and T³ structural units (R-Si(OR')₃ series), enabling evaluation of condensation degree. |
| Average Molecular Weight and Distribution | Gel Permeation Chromatography (GPC)/Size Exclusion Chromatography (SEC) | Use solvents such as tetrahydrofuran (THF), compare with standard samples to determine weight-average molecular weight (Mw), number-average molecular weight (Mn), and polydispersity index (PDI), reflecting the extent of polymerization. |
| Thermal Stability | Thermogravimetric Analysis (TGA) | Heat the sample (typically from 25–800°C) under nitrogen or air atmosphere and measure mass loss temperature to assess decomposition onset temperature and residue percentage. |
| Glass Transition Temperature | Differential Scanning Calorimetry (DSC) | Determine the glass transition temperature (Tg) by measuring heat flow changes during heating, indicating material rigidity and processability. |
| Volatile Content / Moisture Content | Karl Fischer Titration | Quantitatively measures trace water content in the sample to prevent hydrolysis affecting MSQ structure stability—particularly critical for sol-gel synthesized materials. |
| Solid Content | Drying Loss Method | Weigh a known amount of sample, dry it to constant weight at a specified temperature (e.g., 105°C), and calculate the percentage of non-volatile components. |
| Viscosity | Rotational Viscometry | Measure the flow resistance of liquid MSQ at a specific temperature to evaluate its processability (e.g., coating, spin-coating performance). |
| Purity and Impurity Detection | Gas Chromatography-Mass Spectrometry (GC-MS) or ICP-MS | GC-MS detects residual monomers or organic solvents; ICP-MS identifies metal ion impurities (e.g., catalyst residues such as Sn, Ti). |
Technical Specifications of POLY(METHYLSILSESQUIOXANE)
| Test Item | Specification |
|---|---|
| Appearance | Colorless to pale yellow liquid |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.3% |
| Refractive Index (n20/D) | 1.405–1.415 |
| Relative Density (20°C/25°C) | 0.92–0.96 g/cm³ |
| Odor | Characteristic mild hydrocarbon odor |
Specifications vary by industry. Reach out to our technical experts for a COA tailored specifically to your application. Email:selse@GRchemical.com
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Download COA of POLY(METHYLSILSESQUIOXANE)
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
Packaging of POLY(METHYLSILSESQUIOXANE)
Industrial POLY(METHYLSILSESQUIOXANE) Procurement FAQ
1. How do you ensure product quality consistency?
We rely on a mature China-based manufacturing system and implement strict batch control and quality inspection for every shipment. Our production process complies with ISO 9001 standards, and a COA is provided for each batch to ensure consistent and reliable quality.
2. Do you offer competitive pricing for bulk orders?
Yes, as a China-based manufacturer and bulk supplier, we provide tiered pricing based on order volume. We support FOB and CIF quotations, as well as L/C payment terms for large transactions to meet international trade requirements.
3. Can you support large-volume or long-term supply?
We have stable production capacity and a well-established supply chain, enabling continuous bulk supply. We support ton-level and container-level orders, as well as long-term cooperation projects.
4. What is your typical lead time?
For in-stock products, shipment can be arranged within 1–3 days. For bulk packaging or customized orders, lead time depends on the specific quantity and production schedule.
5. What documents do you provide?
We can provide complete documentation upon request, including COA, SDS, TDS, and other compliance certificates, meeting industrial procurement and export requirements.
6. Can you customize product specifications or packaging?
Yes, we support customization of parameters such as purity, impurities, residual solvents, and heavy metals. We also offer various bulk packaging options, including 25kg bags, drums, and IBC tanks, suitable for industrial applications and transportation.
7. What shipping options do you support?
We support both FCL (Full Container Load) and LCL (Less than Container Load) shipments, and can flexibly arrange logistics solutions based on order size to meet bulk chemical export needs.
8. Do you provide technical or application support?
Yes, we provide basic application guidance and technical support based on industry experience to help customers optimize product usage.
9. How do you handle compliance and export regulations?
We are familiar with international trade and export regulations, ensuring all products comply with relevant requirements. We also provide complete documentation to support smooth customs clearance and global delivery.
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