Architectural
Polyester Range
Introduction
Recommended for use in exterior situations where excellent
resistance to weathering is required, e.g. architectural applications
such as aluminium window frames, cladding etc. These products may also
be used where high resistance to yellowing at elevated temperatures are
specified, though our standard polyester range may be adequate. Becker
Powder Coatings' attention to particle size control and formulation ensures
optimum transfer efficiency. 'Tribostatic' grades are available on request.
Colour
Wide range available ex stock or to order.
Gloss
Three levels available (@ 60°) Gloss
85-95, Semi-Gloss 55-65, Matt 25-35.
Film Properties
Conform to the requirements of BS6496:1984 (1991),
which are as follows:
| Substrate | Aluminium alloy to BS EN 485, 515 and 573 | |
| Pre-treatment | Proprietary chromate conversion process | |
| Scratch: | BS3900 E2 | Pass 4kg |
| Impact: | BS3900 E3 | Pass |
| Cupping | BS3900 E4 | 6mm min |
| Adhesion | BS3900 E6 | No detachment |
| Humidity: | BS3900 F2 | Pass 1000 hrs: no blistering |
| Artificial weathering | BS3900 F3 | Meets BS6496 2000 hours |
| S02 resistance | BS3900 F8 | Pass 240 hours |
| Mortar resistance | BS6496 D | No effect |
| Acetic acid salt spray | BS6496 D | Max 2mm creep @ 1000 hours. No blistering |
| Permeability | BS6496 4.3 | Pass |
| Neutral salt fog | ASTM B117 | 1000 hours max 2mm creep. No blistering |
Specific Gravity
1.4 – 1.7 depending on colour, gloss, and other properties.
Coverage
9-12 sq.m/kg @ 50 microns (100% utilisation assumed, depending on colour and gloss).
Film Thickness
Recommended 60-80 microns for most applications.
Curing Conditions
Standard Bake type: including Matt finishes 200°C/10 mins object temperature.
Storage and Handling
Store in dry, cool conditions, preferably below 25°C. Shelf life under these conditions will be approx. 12 months. For full information on handling this product type, refer to individual Safety Data Sheet, and the ‘Code of Safe Practice' issued by the British Coatings Federation.
Pre-treatment
Conversion coating is essential in all cases. The metal must be thoroughly degreased with alkaline or acid cleaner. The conversion coating shall be applied by treatment with a solution of chromate or chromate/phosphate ions as active ingredients, as specified in BS6496.
Coating weights would be in the order of 0.2-2.0 grams/m2 for yellow brown coatings and 0.7-1.2 grams/m2 for green coatings.
Our technical service department will
be pleased to offer further advice on this subject if required.
Application Guidelines
Becker Powder Coatings' Architectural Polyesters are
suitable for use with all electrostatic powder spraying equipment. Voltages
of 30-100 kV should be applied. The powder is sprayed onto earthed metallic
substrates and an even layer of powder is deposited. When subjected to
the correct temperature, the powder melts and flows to form a continuous
film before curing.
| Individual Product Information |
| Reference number |
| Colour |
| Gloss level |
| Specific gravity |
| Stoving schedule |
| Film thickness |
| SDS No |
| Health & Safety |
| We recommend
all users of powder coatings to refer to the Code of Safe Practice:
Application of Powder Coatings by Electrostatic Spraying (published
by the British Coatings Federation of Great Britain Ltd) and our appropriate
Health & Safety data sheet. May
00 |
| The information on this sheet
is based on experience or tests in the laboratory and is published
in good faith in the belief that it will be of value. We can accept no responsibility for loss or damage which may result from accident, misuse or operations not under our direct control. |
