Superdurable polyester powder coatings MT-D2525 MATT
Product description
MT-D2525 Matt is a series of ultra-durable powder coatings specifically formulated without TGIC, intended for use on architectural aluminium and galvanized steel. Providing new levels of weathering resistance MT-D2525 Matt surpasses the performance of leading architectural powders. It offers significantly higher gloss retention and resistance to colour change combined with maximum film integrity to ensure long term cosmetic and functional protection. These powder coatings are classified in Family I – class 6c under standard NFT 36-005. MT-D2525 Matt meets the requirements of GSB Florida 3. Qualicoat Class 2. EN 12206 (formerly BS6496), EN13438 (formerly BS6497:1984) and AAMA 2604. Some colours may not be available in MT-D2525 Matt. Following RAL shades are excluded from the RAL families for Qualicoat class 2: Ral 1003. 1028. 1033. 2004. 2011. 3015. 3017. 3018. 4001.
Approvals
| Qualicoat Approval | P-1210 (FR) P-1212 (IT)
P-1512 (TR) P-1201 (UK) P-1673 (CZ) P-2003 (AE) P-1244 (EG) P-1844 (RU) |
| GSB Approval | 183b (gloss 25) |
| Resistance to Fire Approval | Classification: A2.s1.d0 with film thickness up to 120 µm (generic polyester D1036. D2525) according to EN13501-1 |
Powder properties
| Typical value | |
| Chemical Type | Polyester |
| Appearance | Smooth Matt |
| Density | 1.2 – 1.9 g/cm³, depending on colour |
| Gloss (60°) | 20 – 30 GU |
| Shelf life | 24 months below 30 °C
12 months below 35 °C |
| Storage Conditions | (open boxes must be resealed) Dry, cool conditions |
| Curing schedule | 15 – 35 min at 180°C 12 – 25 min at 190°C 10 -20 min at 200°C (object temperature) |
Pre-treatment
For maximum protection it is essential to pretreat components prior to the application of the powdercoating. Aluminium components should receive a full multi-stage chromate conversion coating or suitable chrome-free pre-treatment or suitable pre-anodising to clean and condition the substrate. Detailed advice should be sought from the pre-treatment supplier. The products may also be used on cast or mild steel. For outdoor use MT-Redox PZ anti-corrosive primer over a correctly prepared substrate is recommended.
Application
Powders can be applied by manual or automatic electrostatic spray equipment. This product should be applied at minimum 60μm. All powders can show small color differences from batch to batch, this is normal and unavoidable. Bonded products have better application properties than blended products (more stable) but attention should still be paid to line settings in order to avoid “marble effect” and changes in aspect after recycling. Products with different codes should not be mixed even if same colour and gloss. Applicators and fabricators are advised to use a single batch for parts that will be assembled together. Differences are more likely with special effect powders. Clearcoats including tinted clearcoats cannot be applied directly on primers. Only fully opaque shades are suitable for application over primer.
Test conditions
The results are based on mechanical and chemical tests which (unless otherwise indicated) have been carried out under laboratory conditions and are given for guidance only Testing has been determined under laboratory conditions using the following application properties and is for guidance only.
| Pre-treatment | Chrome free Qualicoat/GSB approved pretreatment |
| Substrate | Aluminum (0.5-0.8 mm Al Mg1) |
| Curing schedule | 10 min at 200°C (object temperature) |
| Film Thickness | 60 – 80µm, ISO 2360 |
Mechanical tests
| Typical value | Method/standard | |
| Adhesion | Class 0 | ISO 2409 (2 mm Crosshatch) |
| Erichsen cupping | Pass Qualicoat class 2 requirements | ISO 1520 |
| Flexibility | Pass Qualicoat class 2 requirements | ISO 1519 |
| Hardness | >80 | ISO 2815 (Buchholz hardness) |
| Impact resistance | Pass Qualicoat class 2 requirements | ISO 6272-2 (d/r) |
Chemical and durability tests
| Typical value | Method/standard | |
| Chemical Resistance | Generally good resistance to acid, alkalis and oil at room temperatures. | |
| Sulphur Dioxide Resistance | Pass 24 cycles– no blistering, loss of gloss or discoloration | ISO 22479 |
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