Polyester Polyol XF-B-4 for Controlled-Release Fertilizer Coating
Polyester Polyol XF-B-4 is the high-hydroxyl grade (370±20 mgKOH/g) in the fertilizer coating line, offering the highest reactivity for rapid curing and increased crosslink density, which enables the production of tougher, more durable coatings.
Key Selling Points
- Highest Reactivity: With a hydroxyl value of 370±20, this grade provides maximum crosslinking potential, resulting in harder and more solvent-resistant coatings. (Source: parameter)
- Low Moisture (≤0.15%): Ensures consistent curing and prevents blistering or pinholes in the coating film. (Source: parameter)
- Slightly Higher Viscosity (3500±500 CPS): Allows for good film build-up and can be adjusted with solvents for spray application. (Source: parameter)
- ISO 9001 Certified: Manufactured under strict quality guidelines for reliable performance. (Source: ISO 9001 cert)
- Flexible Customization: Tailor the formulation to meet specific release rates and durability requirements. (Source: customization)
Technical Specifications
| Property | Value |
|---|
| Hydroxyl Value (mgKOH/g) | 370±20 |
| Acid Value (mgKOH/g) | ≤3.0 |
| Moisture (%) | ≤0.15 |
| Viscosity (CPS, 25°C) | 3500±500 |
| Raw Materials | PA, PTA, AA, DEG, GLY, etc. |
Models and Options
XF-B-4 is one of three polyester polyol grades offered for controlled-release fertilizer coating:
- XF-270: Hydroxyl value 260±10, moisture ≤0.1%
- XF-B-3: Hydroxyl value 300±30, moisture ≤0.15%
- XF-B-4: Hydroxyl value 370±20, moisture ≤0.15%
This grade is available in standard packaging options such as IBC drums (1200 kg or 1000 kg) and galvanized iron drums (225 kg, 200 kg, or 170 kg).
Materials and Structure
XF-B-4 is synthesized from the same monomer family (PA, PTA, AA, DEG, GLY) but with a formulation that yields a higher hydroxyl number. This results in a more branched structure, providing additional reactive sites for isocyanate crosslinking.
Applications
- Controlled-release fertilizer coating: Enables the creation of thick, robust coatings for extended release durations in demanding environments.
- High-performance polyurethane systems: Ideal for applications requiring rigidity, dimensional stability, and chemical resistance.
Frequently Asked Questions
What is the minimum order quantity for XF-B-4?
MOQ is flexible and can be adjusted according to customer requirements. Please contact us for your specific needs.
Can I get a sample for testing?
Yes, samples are available. Please reach out to arrange sample shipment.
What are the differences between the three grades?
The key difference is the hydroxyl value, which affects reactivity and final coating hardness. XF-270 has the lowest, XF-B-3 intermediate, and XF-B-4 the highest. Choose based on your desired release profile and processing conditions.
What packaging options are available?
We offer IBC drums (1200kg or 1000kg) and galvanized iron drums (225kg, 200kg, 170kg).
Do you support customization?
Yes, we can adjust parameters like viscosity or molecular weight to suit your specific application.
What are your payment terms?
We accept T/T and L/C.
Inquiry Information
For pricing, availability, or technical consultation, please contact:
- Email: admin@xinfapu.com
- Phone: +86 156-3365-7995
- WhatsApp: +86 166-3389-3646
Our team is ready to assist with your polyester polyol requirements.
