Polyester based powder coatings MT-600 AM

Product Description

MT-600 AM is a series of polyester based powder coatings, formulated with the use of TGIC, designed for the exterior environment, offering the benefits of MT- 600 in combination with specific antimicrobial activity. MT- 600 AM powders are available in a wide range of colours in gloss, satin, matt, metallic and textured effects and can be custom matched to the user’s requirements.

Powder Properties

Chemical type	Polyester – TGIC
Particle Size	Suitable for electrostatic spray
Specific gravity	1.2-1.8 g/cm³ depending on colour
Color	Grey
Storage	Dry cool conditions below 25°C (open boxes must be resealed)
Shelf life	12 months
Stoving schedule (object temperature)	15 minutes at 190°C 10 minutes at 200°C 8 minutes at 210°C

Mechanical Tests

Flexibility	ISO 6860 (Conical Mandrel)	Pass 3 mm
Adhesion	ISO 2409 (2mm Crosshatch)	Gt 0
Erichsen Cupping	ISO 1520	Pass 7 mm
Hardness	ISO 1518 (2000g)	Pass – no penetration to substrate
Impact	ISO 6272	50 kgcm

Chemical and Durability Tests

Salt Spray	ISO 7253 (250 hours)	Pass – no corrosion creep more than 2mm from scribe
Cyclic Humidity	ISO 6270-1 (1000 hours)	Pass – no blistering or loss of gloss
Distilled Water Immersion	ISO 2812 (240 hours)	Pass – no blistering or loss of gloss
Exterior Durability	Excellent – non chalking, slight loss of gloss after 12 months continuous exposure but no film breakdown or reduction in protective properties
Chemical Resistance	Generally excellent resistance to most acids, alkalis and oils at normal temperatures
Colour Stability at Elevated temperatures	Excellent for continuous exposure up to 150°C.

Pre-treatment

Aluminium, steel or Zintec surfaces to be coated must be clean and free from grease. Iron phosphate and particularly lightweight zinc phosphating of ferrous metals improves corrosion resistance. Aluminium substrates may require a chromate conversion coating.

Application

MT-600 AM powders can be applied by manual or automatic electrostatic spray equipment. Unused powder can be reclaimed using suitable equipment and recycled through the coating system.

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