High Thixotropic PVC Paste Resin EH-251 for Sealants and Coatings
EH-251 is a high thixotropic PVC paste resin produced by emulsion polymerization, designed for applications requiring anti-sagging on vertical surfaces. Its low water absorption and high transparency make it suitable for sealants, waterproofing materials, coatings and adhesives. The resin has a K-value of 76, a degree of polymerization of approximately 1550-1650, and a paste viscosity of 5,500 mPa·s at 30°C (DOTP 100:80). Batch stability ensured by Kaneka's strict quality control.
Key Selling Points
- High Thixotropy: Excellent anti-sagging for vertical surfaces, ensuring uniform coating thickness and reduced material waste. (source: Core Advantages)
- Low Water Absorption: Products resist deformation in humid environments, extending service life in sealants and waterproofing. (source: Core Advantages)
- High Transparency: Suitable for sealants and coatings where appearance is critical, maintaining clarity without yellowing. (source: Core Advantages)
- Environmental Compliance: Residual VCM ≤5.0mg/kg, meeting international environmental standards for sensitive applications. (source: product params)
- Consistent Quality: Small batch-to-batch performance differences, ensuring production stability. (source: Core Advantages)
Technical Specifications
| Parameter | Value | Test Method |
|---|
| Production Process | Emulsion Polymerization | - |
| Chemical Type | Polyvinyl Chloride Homopolymer | - |
| Appearance | White fine powder, avg. particle size 0.2-0.5μm | - |
| K Value | 76 (typical) | Soluble polymers in cyclohexanone |
| Degree of Polymerization | Approx. 1550-1650 | Calculated from K value |
| Paste Viscosity (V20) | 5,500 mPa·s (typical) | 30°C, resin:DOTP=100:80 |
| Volatile Component | ≤0.50% | 105°C, 2h |
| Residual VCM | ≤5.0 mg/kg | Gas chromatography |
| Sieve Residue | ≤10.0 mg/kg | 0.15mm sieve |
| Bulk Density | 0.30-0.50 g/cm³ | Loose bulk density |
| Glass Transition Temp. | Approx. 81°C | DSC |
| Moisture Content | ≤0.30% | Karl Fischer |
Models and Options
Model: KANEVINYL PASTE EH-251. Packaging: 25KG/BAG. MOQ: 200 kg/drum or 20 kg/bag (as per purchase info). Delivery: FOB, CIF. Payment terms: payment before shipment.
Materials and Structure
Polyvinyl chloride paste resin, CAS 9002-86-2, EINECS 208-750-2. Homopolymer with thixotropic rheology: high viscosity at low shear, good fluidity at high shear. White fine powder.
Applications
- Polyurethane Sealants (construction, automotive, industrial)
- Building Waterproof Sealing Materials (window, curtain wall, roof)
- Electronic Component Potting Adhesives (module potting, LED encapsulation)
- Coatings and Paints (anti-corrosion, metal, marking films)
- Adhesives (high bonding strength, flexibility)
Customization
Product can be customized for specific formulations; we provide technical support for formula optimization and product upgrading. Contact our R&D team to discuss specific requirements.
FAQ
Q: What is the thixotropic index of EH-251?
A: The thixotropic rheology is described as high viscosity at low shear and good fluidity at high shear, ensuring anti-sagging without sacrificing workability.
Q: Can EH-251 be used in food contact applications?
A: Residual VCM is ≤5.0 mg/kg, in line with international environmental standards. However, always verify compliance with specific food contact regulations in your market.
Q: What is the recommended plasticizer for EH-251?
A: DOTP is used as standard in viscosity testing, but other plasticizers like DINCH may be used depending on formulation requirements.
Q: How is EH-251 packaged?
A: Standard packaging is 25 kg bags, but we can also supply 200 kg drums or 20 kg bags for larger orders.
Q: What is the storage stability?
A: Under cool and dry storage, the product has a 2-year shelf life.
Q: Does EH-251 meet environmental regulations?
A: Yes, it complies with high-risk substance controls such as heavy metals, phthalates, PAHs, REACH, RoHS, EN71, etc., as confirmed by our quality system.
Q: Can you provide samples?
A: Yes, please contact us for sample requests. We can arrange delivery with a short lead time.
Inquiry Information
For further details or to place an order, contact: Chen Bingbing, Email: misscheng1984@163.com, Tel: +86 13580992838, WhatsApp: +84 865388399. Address: Building 1, No. 26, Yingguang Road, Chang'an Town, Dongguan City, Guangdong Province, China.
