VHT Resistant Powder
890 SERIES
An exterior durable powder coating specially designed to withstand high temperatures in the range 250-600°C. Possible uses for the product include: • Gas barbeques • Heat exchangers • Exhaust piping • Cookware <b>Application Details:</b> The system has been designed for electrostatic application. A version for Tribo application is available on request. The product achieves best results when sprayed to a dry film thickness (DFT) of 40µm (microns) or less. A thicker film results in a steady reduction in the adhesion properties of the coating. Care should be taken in the choice of pre-treatment used as the pretreatment itself may degrade at higher temperatures.
Data Sheets
Technical Properties
Coverage
From 10 – 14 m2/kg at 50 microns film thickness.
Storage
Store between 5°C - 25°C. When not in use, cans must be kept sealed
Shelf Life
Store in a dry, cool (<20ºC) environment – 6 months.
Additional Technical Information
General
All tests carried out on degreased and zinc phosphated steel at a coating thickness of 40 microns. Mechanical properties, especially impact resistance, will improve with full curing conditions.
Heat Resistance
260°C for 3 hours – excellent adhesion
400°C for 2 hours – good adhesion†
500°C for 2 hours – excellent adhesion
600°C for 2 hours – excellent adhesion
Please note that the poorer adhesion at 400°C is due to sintering occurring
between 400 and 420°C.
Pencil Hardness
6H
Flexibility-Bend Test (ISO 1519)
(BS 3900: Part E1: 1970)
>5 mm (3/16 inch) diameter Mandrel
Adhesion (ISO 2409)
Cross hatch (BS 3900: Part E6: 1974)
Classification Gt 1
Cupping Test (ISO 1520)
(BS 3900: Part E4: 1976)
>5 mm
Impact Test – Falling Weight (ECCA T5)
(BS 3900: Part E7: 1974)
>25 kg cm (N)
Curing Information
Normal Cure: 30 minutes at 230ºC (Object Temperature). N.B. Full cure will only be achieved when the coating reaches higher temperatures in use. The curing schedule above will allow handling without loss of adhesion, etc.
Corrosion Resistance
Neutral Salt Spray (ASTM B117)
More than 500 hours with creepage of corrosion less than
2mm from scribe mark.
Resistance to Mortar (ASTM C 207)
Easy to remove. No staining
Kersternich Test (ISO 3231)
DIN 50018 KFW2.0S
More than 10 cycles with creepage less than 2mm from scribe mark.
Humidity (DIN 50017, BS 3900: Part F2: 1973)
More than 1000 hours without any effect.
Boiling Water Resistance
After 2 hours boiling water, or 1 hour pressure cooker: no defects or detachment.
Colour Range
Matt aluminium or black.
Cleaning
Ensure surfaces to be coated are dry and must be cleaned using the appropriate HMG product to remove all traces of contaminants. HMG produce a full range of cleaners, silicone removers, degreasers and preparatory cleaners suitable for the cleaning process. Please refer to our website for Knowledge Base article Prep-Cleaning Techniques (KNB0009) and Preparatory Cleaners from the Product Guide.
Surface Preparation
Please refer to Knowledge Base for details on Surface Preparation.
Health & Safety
- Refer to Health & Safety Data Sheet prior to use.
- <a href="http://www.hmgpowdercoatings.com/resources/safety-data-sheets">http://www.hmgpowdercoatings.com/resources/safety-data-sheets</a>
- This range does NOT contain triglycidyl isocyanurate (TGIC)
Additional Information
A thermosetting powder coating based on an organosilicone matrix.
Gloss
Matt 20% ± 5
Issued
22/09/2005 16:35:00