Surface Finish Options Overview
Product Description
MT-CA220G is a polyester and acrylic based powder coating designed for exterior exposure offering low gloss and weather resistance from a single coat finish. MT-CA220G is part of the MT range of powder coatings with high total reflectance, designed specifically for the lighting market.
Powder Properties
| Chemical type | Polyester Acrylic |
| Appearance | Smooth Matt |
| Particle Size | Suitable for electrostatic spray |
| Specific gravity | 1.60 ± 0.05 g/cm³ |
| Film Thickness | 75 – 100 microns |
| Storage | Dry cool conditions below 25oC (open boxes must be resealed) |
| Shelf life | 12 months |
| Stoving schedule (object temperature) | 15 minutes at 200°C |
Test Conditions
The results shown below are based on mechanical and chemical tests which (unless otherwise indicated) have been carried out under laboratory conditions and are given for guidance only. Actual product performance will depend upon the circumstances under which the product is used.
| Substrate | Cold Rolled Steel |
| Pretreatment | Gold Seal polished steel (mechanicals) Gold Seal lightweight zinc phosphate (chemical tests) |
| Film Thickness | 60-80 microns |
| Stoving Schedule | 15 minutes at 200°C |
Mechanical Tests
| test | results | |
| Flexibility | ASTM D522 | 6mm |
| Adhesion | ASTM D3359 | 5B |
| Impact (direct) | ASTM D2794 | 30kgcm |
| Gloss(@60°） | ISO 2813 | 10±2 |
| Reflectance Class | DIN EN 16268 | B |
Pre-treatment
Steel surfaces to be coated must be clean and free from grease, mill scale and rust. For maximum protection, it is essential to pre-treat components prior to the application of MT-CA220G. Iron phosphate and zinc phosphate pre-treatment of ferrous substrates improve corrosion resistance. Aluminium substrates may require a chromate conversion coating.
Application
MT-CA220G can be applied using manual or automatic electrostatic spray equipment. It is recommended, that for consistent application and appearance, the product be fluidized during application. Unused powder can be reclaimed using suitable equipment and recycled through the coating system.
