Polyester Polyol XF-B-3 for Controlled-Release Fertilizer Coating
Polyester Polyol XF-B-3 provides a higher hydroxyl value of 300±30 mgKOH/g for enhanced reactivity in fertilizer coating applications. This grade offers a balance of film hardness and flexibility, supporting efficient nutrient release control.
Key Selling Points
- Enhanced Reactivity: Higher hydroxyl value (300±30) enables faster crosslinking with isocyanates, potentially reducing production cycle times. (Source: parameter)
- Low Moisture (≤0.15%): Maintains coating uniformity and prevents side reactions, ensuring a stable release profile. (Source: parameter)
- Optimized Viscosity (3000±500 CPS): Similar to XF-270, this viscosity ensures ease of handling and uniform application. (Source: parameter)
- Consistent Quality: Manufactured under ISO 9001 quality system, providing reliable batch consistency. (Source: ISO 9001 cert)
- Versatile Formulation: Can be tailored to achieve specific film properties through adjustments in crosslinking density. (Source: raw materials and structure)
Technical Specifications
| Property | Value |
|---|
| Hydroxyl Value (mgKOH/g) | 300±30 |
| Acid Value (mgKOH/g) | ≤3.0 |
| Moisture (%) | ≤0.15 |
| Viscosity (CPS, 25°C) | 3000±500 |
| Raw Materials | PA, PTA, AA, DEG, GLY, etc. |
Models and Options
XF-B-3 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-3 is produced from monomers including phthalic anhydride (PA), purified terephthalic acid (PTA), adipic acid (AA), diethylene glycol (DEG), and glycerol (GLY). The polycondensation process yields a branched polyester polyol with terminal hydroxyl groups, offering a balance of reactivity and mechanical properties for coating applications.
Applications
- Controlled-release fertilizer coating: Provides a robust membrane that modulates nutrient release based on coating thickness and formulation.
- Polyurethane systems: Suitable for producing rigid or semi-rigid foams, adhesives, and coatings where higher crosslink density is desired.
Frequently Asked Questions
What is the minimum order quantity for XF-B-3?
MOQ is flexible and can be adjusted according to customer requirements. Please contact us for your specific needs.
Can the hydroxyl value be customized?
Yes, we offer customization services to modify the hydroxyl value and other properties to meet your application requirements.
What packaging options are available?
XF-B-3 is available in IBC drums (1200kg or 1000kg) and galvanized iron drums (225kg, 200kg, 170kg). Custom packaging is also available.
How does this grade differ from XF-270?
XF-B-3 has a higher hydroxyl value (300±30) compared to XF-270 (260±10), which affects reactivity and final coating properties.
Can you provide a sample before ordering?
Yes, we can provide samples for testing. Please contact our sales team to arrange the shipment.
Which payment terms do you accept?
We accept T/T and L/C payment terms.
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.
