CR244 Polychloroprene Rubber (Adhesive Grade)
Product Overview
CR244 is a specialized adhesive-grade polychloroprene rubber manufactured by HuojiaChanghua, specifically designed for contact adhesive applications. This high-performance synthetic rubber provides excellent bonding strength and versatility for various substrate combinations.
The CR244 series offers multiple viscosity grades to meet different application requirements, from low-viscosity formulations for easy application to high-viscosity grades for demanding structural bonding applications.
Key Applications
- Contact adhesives for rubber-to-metal bonding
- Leather and textile lamination adhesives
- Fiber reinforcement bonding applications
- Wood and furniture assembly adhesives
- Construction and building material bonding
- Cement product adhesive formulations
Key Properties
- Excellent adhesion to various substrates
- Fast tack development and strong initial bond
- Good heat and chemical resistance
- Flexible bond line maintains elasticity
- Wide range of viscosity options available
- Compatible with various solvents and additives
Grade Selection Guide
The CR244 series offers six different grades to meet specific application requirements:
- CR2441 & CR2442: Standard viscosity grades for general-purpose adhesive applications
- CR2443 & CR2444: Medium to high viscosity grades for structural bonding
- CR244HVA & CR244HVB: High-viscosity grades for demanding applications requiring maximum bond strength
Technical Specifications
| Property | Test Method | CR2441 | CR2442 | CR2443 | CR2444 | CR244HVA | CR244HVB |
|---|---|---|---|---|---|---|---|
| Mooney Viscosity ML(1+4)100°C | GB/T 1232.1 | 40±5 | 55±5 | 70±5 | 85±5 | 100±10 | 120±10 |
| Volatile Matter (%) | GB/T 1232.1 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 |
| Ash Content (%) | GB/T 4498.1 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 |
| Tensile Strength (MPa) | GB/T 528 | ≥20 | ≥22 | ≥24 | ≥26 | ≥28 | ≥30 |
| Elongation at Break (%) | GB/T 528 | ≥450 | ≥400 | ≥350 | ≥300 | ≥280 | ≥250 |
| Shore A Hardness | GB/T 531.1 | 60±5 | 65±5 | 70±5 | 75±5 | 80±5 | 85±5 |
| Compression Set (%) 22h×70°C | GB/T 7759.1 | ≤30 | ≤25 | ≤20 | ≤18 | ≤15 | ≤12 |
| Heat Aging 70°C×168h Tensile Strength Change (%) | GB/T 3512 | ≤±20 | ≤±18 | ≤±15 | ≤±15 | ≤±12 | ≤±10 |
| Heat Aging 70°C×168h Elongation Change (%) | GB/T 3512 | ≤±30 | ≤±25 | ≤±20 | ≤±20 | ≤±18 | ≤±15 |
Processing Guidelines
- Recommended solvent systems: Toluene, MEK, or approved solvent blends
- Typical solid content: 15-25% depending on application requirements
- Application temperature: 15-35°C for optimal performance
- Open time: 5-30 minutes depending on grade and conditions
- Cure time: 24-48 hours for full bond development
Packaging & Storage
- Standard packaging: 25kg per bale, wrapped in polyethylene film
- Storage temperature: Below 25°C in dry, ventilated warehouse
- Shelf life: 12 months from production date under proper storage conditions
- Protect from direct sunlight and heat sources
- Store away from oxidizing agents and strong acids
Quality Standards
- Manufactured according to Q/JYS25-2014 standard
- ISO 9001:2015 certified production facility
- Batch-to-batch consistency testing
- Application testing support available
- Technical documentation and MSDS provided
Contact Our Adhesive Specialists
Need help selecting the right CR244 grade for your adhesive application? Our technical team provides comprehensive support for formulation development and application optimization.
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