CARBINOL (HYDROXYL) TERMINATED POLYDIMETHYLSILOXANE
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Category：Agrochemicals Own Brand：MT /MOQ:100KG /From China/ B2B only.
Introduction
Carbinol (Hydroxyl) Terminated Polydimethylsiloxane (PDMS)
1. Basic Information
- Chemical Name: α,ω-Bis(hydroxyalkyl)-terminated polydimethylsiloxane
- Synonyms:
- Hydroxy-terminated PDMS
- PDMS-diol
- Silicone polyol
- CAS Number: Varies by molecular weight (e.g., 70131-67-8 for typical grades)
- Molecular Formula: HO-[Si(CH₃)₂O]ₙ-H
- Appearance: Colorless to pale yellow viscous liquid
- Odor: Odorless or slight silicone-like odor
2. Physical and Chemical Properties
| Property | Typical Value Range |
|---|---|
| Molecular Weight | 500–100,000 g/mol (customizable) |
| Viscosity | 50–100,000 cSt (25°C) |
| Density | 0.97–1.02 g/cm³ (25°C) |
| Hydroxyl Value | 1–100 mg KOH/g (depends on MW) |
| Flash Point | >200°C (392°F) |
| Solubility | – Soluble in hydrocarbons, ethers |
| – Insoluble in water, methanol |
3. Hazards (GHS Classification)
- Skin Irritation: May cause mild irritation (H315)
- Eye Irritation: Causes mild eye irritation (H319)
- Environmental: Not classified (low toxicity)
- NFPA Rating: Health 1, Flammability 1, Reactivity 0
4. Storage and Handling
- Storage:
- Keep in sealed containers to prevent moisture absorption
- Store at 5–30°C (avoid freezing)
- Handling:
- Use gloves (nitrile) and goggles
- Ventilation recommended for high-temperature processing
5. Applications
- Silicone Rubber: Crosslinker for RTV-2 systems
- Polymer Modification:
- Improves flexibility in polyurethanes
- Used in epoxy-silicone hybrids
- Cosmetics: Skin-conditioning agent (INCI: Dimethiconol)
- Industrial Coatings: Provides water repellency
Disclaimer:
The above content is for reference and communication only among industry insiders, and does not guarantee its accuracy or completeness. According to relevant laws and regulations and the regulations of this website, units or individuals who purchase related items should obtain valid qualifications and qualification conditions.
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