Performance Features
Excellent film fullness, weathering resistance, good drying, levelling
Main Applications
Topcoat or clearcoat for car
High Hydroxyl Polyol Resin: Overview and Key Properties
| Category | Details |
|---|
| Chemical Type | Polyether or polyester polyol |
| Hydroxyl Value | 200–800 mg KOH/g |
| Functionality | 2–6 (typically 2–3) |
| Viscosity (25°C) | 500–10.000 mPa·s |
Key Characteristics
| Property | Typical Range |
|---|
| Molecular Weight | 500–5.000 g/mol |
| Acid Value | <2 mg KOH/g |
| Water Content | <0.1% |
| Glass Transition Temp. (Tg) | -60°C to +50°C |
Production Methods
| Process | Description |
|---|
| Polyether Route | Alkylene oxide polymerization |
| Polyester Route | Diacid/diol condensation |
| Modification | Grafting or chain extension |
Primary Applications
| Industry | Use Case | Key Benefit |
|---|
| Polyurethanes | Flexible foams, elastomers | Crosslink density control |
| Coatings | 2K polyurethane systems | Improved adhesion |
| Adhesives | Structural bonding | Enhanced toughness |
| Elastomers | Cast PU parts | Mechanical property tuning |
Formulation Guidelines
| Component | Role | Typical Ratio |
|---|
| Polyol Resin | Base polymer | 60–90% |
| Isocyanate | Curing agent | 10–40% (NCO:OH = 1:1) |
| Catalysts | Reaction control | 0.1–1% |
| Additives | Property modifiers | 1–5% |
Performance Advantages
| Feature | Impact |
|---|
| High Reactivity | Faster cure times |
| Tunable Flexibility | Wide hardness range (Shore A 50–D 80) |
| Chemical Resistance | Improved vs. low-OH polyols |
Comparison with Other Polyols
| Parameter | High-OH Polyol | Low-OH Polyol |
|---|
| Cure Speed | Fast | Slow |
| Crosslink Density | High | Low |
| Flexibility | Adjustable | Inherently flexible |
Safety & Handling
| Aspect | Requirement |
|---|
| Storage | Nitrogen blanket, <40°C |
| VOC Content | <50 g/L (solvent-free) |
| PPE | Gloves, eye protection |
Market Data
| Application | Market Share | Growth Rate |
|---|
| Flexible Foam | 45% | 4.2% CAGR |
| Coatings | 30% | 5.8% CAGR |
| Adhesives | 25% | 6.5% CAGR |
Key Benefits and Limitations
| Advantages | Limitations |
|---|
| Precise property control | Moisture sensitivity |
| Broad formulation window | Higher cost than conventional polyols |
| Excellent mechanicals | Requires strict stoichiometry |
Summary
High hydroxyl polyol resins enable advanced polyurethane systems with tailored performance, particularly where enhanced crosslinking and durability are required. Their versatility continues to drive innovation in sustainable and high-performance material development.
Declaration: The products displayed on this website are intended exclusively for industrial applications or scientific research. They are not intended for medical, pharmaceutical, or food use. In accordance with applicable laws and regulations, purchasing organizations must hold valid qualifications and approvals.
