Medium Hydroxyl Polyol Resins
We are a manufacturer based in China. We specialize in providing high-quality Medium Hydroxyl Polyol Resins for industrial clients across various sectors. Whether you need chemicals consultation or technical support, our team is here to help.
Category：Paint chemicals Own Brand：MT /MOQ:100KG /From China/ B2B only.
Introduction
Performance Features
Excellent film fullnesss , gloss, durable, yellowing resistance , levelling,and image distinctness
Main Applications
Topcoat or clearcoat for car
Medium Hydroxyl Polyol Resins: Overview and Key Properties
| Category | Details |
|---|---|
| Chemical Type | Polyether or polyester polyol |
| Hydroxyl Value | 100–300 mg KOH/g |
| Functionality | 2–4 (typically 2–3) |
| Viscosity (25°C) | 300–5.000 mPa·s |
Key Characteristics
| Property | Typical Range |
|---|---|
| Molecular Weight | 1.000–4.000 g/mol |
| Acid Value | <1.5 mg KOH/g |
| Water Content | <0.1% |
| Glass Transition Temp. (Tg) | -50°C to +30°C |
Production Methods
| Process | Description |
|---|---|
| Polyether Route | Alkylene oxide polymerization |
| Polyester Route | Diacid/diol condensation |
| Hybrid Systems | Mixed polyether-polyester |
Primary Applications
| Industry | Use Case | Key Benefit |
|---|---|---|
| Polyurethanes | Semi-rigid foams | Balanced flexibility/rigidity |
| Coatings | Industrial finishes | Improved flow and leveling |
| Adhesives | Sealants | Optimal cure speed |
| Elastomers | Microcellular PU | Tunable rebound |
Formulation Guidelines
| Component | Role | Typical Ratio |
|---|---|---|
| Polyol Resin | Base polymer | 50–80% |
| Isocyanate | Curing agent | 20–50% |
| Chain Extenders | Hard segment control | 5–15% |
| Additives | Property modifiers | 1–3% |
Performance Advantages
| Feature | Impact |
|---|---|
| Balanced Reactivity | Controlled gelation |
| Versatile Hardness | Shore 60A–90A |
| Process Stability | Wide processing window |
Comparison with Other Polyols
| Parameter | Medium-OH Polyol | High-OH Polyol | Low-OH Polyol |
|---|---|---|---|
| Cure Speed | Moderate | Fast | Slow |
| Crosslink Density | Medium | High | Low |
| Cost Efficiency | Best balance | Higher | Lower |
Safety & Handling
| Aspect | Requirement |
|---|---|
| Storage | Dry, <35°C |
| VOC Content | <100 g/L |
| PPE | Basic chemical protection |
Market Data
| Application | Market Share | Growth Rate |
|---|---|---|
| Foams | 40% | 4.5% CAGR |
| Coatings | 35% | 5.0% CAGR |
| Elastomers | 25% | 6.0% CAGR |
Key Benefits and Limitations
| Advantages | Limitations |
|---|---|
| Optimal cost-performance | Limited high-temp resistance |
| Broad compatibility | Requires precise NCO:OH ratio |
| Easier processing | Moderate moisture sensitivity |
Summary
Medium hydroxyl polyol resins offer the ideal balance between performance and processability for mainstream polyurethane applications. Their intermediate reactivity enables efficient production of diverse products from automotive interiors to industrial coatings.
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