Coil coating resin
CJ-565 Back Coat Resin
Designed for the reverse side of coated metal—providing flexible backside protection, strong adhesion, and stable processing performance.
What is CJ-565?
CJ-565 is a saturated polyester resin developed for back coat systems in coil coating applications. It is designed for the reverse side of coated metal, where practical protection, flexibility, and stable process compatibility are required.
Compared with weather-exposed topcoat materials, CJ-565 focuses on backside adhesion, forming adaptability, solvent resistance, and balanced line performance as part of a complete coil coating structure.
Why CJ-565 Works for Back Coat Systems
Excellent flexibility for reverse
side forming performance
Excellent adhesion for stable backside coating behavior
Good compatibility with epoxy resin systems
Strong solvent resistance for practical processing needs
Wide curing window for efficient coil line application
Position in the full structure
CJ-565 is positioned for the back coat layer in a complete coil coating system. In a typical coating structure: Topcoat provides weather resistance and appearance. Primer supports base adhesion and interlayer bonding. Back coat delivers reverse-side protection, flexibility, and practical handling performance. When matched with suitable primer and topcoat selections, CJ-565 helps complete the functional package of coil-coated metal products.
Metal → Primer → Topcoat → Back coat
Typical applications
- Architectural panels
- Appliance substrates
- General industrial coil stock
- Prepainted steel reverse-side coating
- Back coat structures requiring flexible handling performance
Back Coat Role in System Design
Selecting a suitable back coat resin alongside primer and topcoat helps keep corrosion assumptions, handling requirements, and overall process compatibility aligned across the full metal coating system.
When reverse-side appearance or weld area performance matters, resin choice should match line speed, curing window, substrate type, and topcoat chemistry.
CJ-565 is suitable for projects that require a balanced combination of flexibility, adhesion, solvent resistance, and practical line adaptability on the back coat side.
Technical highlights
Representative reference ranges appear on product pages or in TDS documents. Summary below — request a full TDS or product sheet from our team.
Appearance
Light yellow transparent liquid
Viscosity (Format tube, 25°C)
15-25 s
Solid content (Wt)
60±2 %
Acid value
≤10 mgKOH/g
Flexibility
T-bend 0–1T
Curing window
±50°C
Packaging
200 kg/barrel
Technical data & next steps
Use the links below for matching coatings, selection support, or to request technical documents.