OXYPLAST BELGIUM N.V./S.A. OXYPLAST POLYESTER POWDER COATING PE50

Transcription

1 OXYPLAST BELGIUM N.V./S.A. Hulsdonk 35, B-9042 Gent-Mendonk, Belgium Phone +32 (0) Telefax +32 (0) info@oxyplast.be - Website: OXYPLAST POLYESTER POWDER COATING PE50 A TGIC-Free Polyester Powder Coating DESCRIPTION Polyester resins, the basic components of outdoor thermosetting powders, have been used since 1975 for the decorative protection of outdoor material and particularly Architectural Aluminium. The long experience accumulated with polyester powders in this application field, particularly with OXYPLAST PR29, based on carboxylic polyesters and the highperformance hardener Triglycidyl isocyanurate, has ensured reliable results for what weather and corrosion resistance is concerned. These polyester powders have a very good reputation in the world of architectural aluminium. Since the start of powder production in 1964, OXYPLAST BELGIUM has always kept a leading position in innovation, considering the chief advantages of powder coating as an environmentally friendly coating product. As part of its continuous technology development, OXYPLAST BELGIUM has aimed to introduce new thermosetting systems showing equivalent performance as "Polyester- TGIC" powders. This work has led in the early 90 s to the introduction of a new coating product: OXYPLAST PE50, a TGIC-FREE outdoor durable powder coating, that received already in 1992 a Qualicoat certification (class 1: normal durable / category 3: gloss % at 60 ). SPECIFICATIONS OXYPLAST PE50 fulfils the most important specifications used for the decorative and protective coating of Aluminium, namely : QUALICOAT: Approval number P-0081 GSB (Germany): Approval number 140b British Standard BS V.M.R. (Netherlands) PE50/ENG-06/13 1

2 PROPERTIES OF THE POWDER Melting range (Kofler) : C Specific gravity (DIN 55990/3) : 1.60 ± 0.05 (white powder) Particle size distribution (Laser diffraction) Diameter (µm) % undersize ± ± ± ± 3 Gel time 180 C (DIN 55990/8) : seconds POWDER APPLICATION OXYPLAST PE50 powder coatings can be applied by electrostatic spraying using classic, high performance devices which can produce a high negative tension, preferably above 80 kilovolts. OXYPLAST PE50 powder coatings can also be applied by means of tribo guns. The curing will take place in a suitable convection oven. Curing schedule: 10 minutes at 180 C (metal temperature) WARNING One should take care of the following parameters during application and curing of OXYPLAST PE OXYPLAST PE50 must be cured at 180 C (metal temperature) and preferably not above 200 C. * SEE CURING CURVES FOR MINIMUM AND MAXIMUM SCHEDULES. 2. OXYPLAST PE50 will be applied at prescribed film thicknesses i.e. between 60 and 120 micron. 3. OXYPLAST PE50 is partly compatible with OXYPLAST PR29. For example, a dry-blend of 50% PE50 and 50% PR29 will give a gloss drop of 10% compared to pure PE50. Before switching over from PR29 to PE50, one should thoroughly clean the powder application plant as well as the reclaim devices like cyclones, filters, sieves etc. PE50/ENG-06/13 2

3 PROPERTIES OF THE COATING The general properties hereafter are determined on chromated aluminium, according to the QUALICOAT and GSB specifications. However OXYPLAST PE50 also ensures the protection of other metal substrates like steel or galvanized steel provided adequate surface treatment is applied in order to guaranteeing an optimal adhesion as well as good corrosion protection. Steel (indoor) Steel (outdoor) Galvanized steel (Zinc) : iron phosphate amorphous : zinc phosphate crystalline or better: tri-cationic phosphatation : chromatation or tri-cationic phosphatation Metallized steel (flame-sprayed) : - Aluminium : chromate treatment (DIN 50939) OXYPLAST PE50 meets the Qualicoat requirements under the "NORMAL DURABLE" QUALICOAT CLASS 1 specification. OXYPLAST PE50 PROPERTIES OF THE COATING Substrate : Chromated aluminium Curing cycle : 10 min/180 C (metal temperature) Film thickness : minimum 60 micron Gloss level, ISO 2813: : Category 3 : % Adhesion, ISO 2409: 1992 : Gt = 0 Reverse impact ECCA T5: 1985 (N.m) : minimum 2.5 Erichsen cupping, ISO 1520: 1973 (mm) : minimum 5 Cylindrical bending, diameter 5 mm, ISO 1519: 1973 : no cracks Buchholz hardness, ISO 2815: 1973 : > 80 Pencil hardness, Wolff & Wilborn : H 2H Persoz hardness, NF.T (s) : > 250 Clemen hardness : > 3 kg Taber abrasion, ASTM D , wheel CS10, 10 N, 1000 revs. - Loss of weight (mg) : < 30 PE50/ENG-06/13 3

4 WEATHERING, UV RESISTANCE, DURABILITY Florida exposure According to the QUALICOAT specification OXYPLAST PE50 coatings have been exposed in Florida and are giving the same performance as OXYPLAST PR29. Accelerated weathering DIN 53231:1991 SUNTEST QUALICOAT 10th Edit. April 2003 Duration: 1000 hours RAL Colour Gloss retention DELTA E (%) (DIN 6174) UV and Condensation resistance ASTM G53 OXYPLAST PE50 has been tested in the QUV accelerated weathering device. QUV A340; exposure 8 hours; condensation 4 hours Duration: 1000 hours RAL Colour Gloss retention DELTA E (%) (DIN 6174) PE50/ENG-06/13 4

5 Resistance to acetic acid saltspray ISO 9227: 1990 (1000 hours) : no change, no undercutting at scratch. Resistance to SO 2 (Kesternich) ISO 3231: 1993 (0.2 l SO 2-24 cycli) : no colour change, no softening, blistering or loss of adhesion. Boiling water test Chromated aluminium panels coated with OXYPLAST PE50 have been immersed for 2 hours in boiling distilled water : no chalking, softening, discoloration or disbonding of the coating is observed. FUNCTIONAL DATA Mortar resistance : No loss of adhesion or surface marring (ASTM C207: 1985) from mortar pats after 24 hours at 38 ± 3 C at 95 ± 5% relative humidity. Hygiene criteria Chemical resistance : Odourless and disinfectable. : OXYPLAST PE50 is resistant for a brief contact to various chemicals. The reagent is maintained in contact with the coating during 48 hours at room temperature. CHEMICALS RESULTS Hydrochloric acid 10 % film unchanged Nitric acid 30 % film matt but washable Hydrogen sulphide (saturated) film unchanged Hydrogen peroxide 40 Vol film unchanged Ammonium hydroxide 10 % film unchanged Ammonium hydroxide 33 % film unchanged Sodium hydroxide 5 % film unchanged Tartaric acid 5 % film unchanged Citric acid 5 % film unchanged Lactic acid 5 % film unchanged Ethanol film unchanged n-butanol film unchanged Petroleum ether slight softening PE50/ENG-06/13 5

6 Building materials Mastics / Sealants Storage stability Storage of finished pieces : OXYPLAST PE50 is compatible with normal building materials. For more information, refer to OXYPLAST BELGIUM. : Before the application of a sealant the coating needs to be degreased. Some degreasing agents may influence the gloss or the aspect of the coating. An efficient degreasing, without affecting the coating aspect, is being obtained with Multi Foam (Novatio) or an equivalent product. A good adhesion between the PE50 coating and the sealant is obtained with the following sealants: Sealtrans (Novatio), Seal&Bond SIL25 (Novatio), or an equivalent product. Refer to OXYPLAST BELGIUM for detailed information. : Due to a high glass transition temperature, OXYPLAST PE50 powder can be stored for at least one year at a temperature of 25 C. : OXYPLAST BELGIUM advises to pack finished pieces in such a way that aspiration is possible, in order to preventing local condensation. Furthermore, OXYPLAST BELGIUM advises to store packed pieces in a dry room, in which contact with direct sunlight is avoided. In the event of storage of finished pieces in poorly ventilated packing, in extreme cases, under the influence of condensation and direct sunlight, local discoloration of the coating may occur for dark colours. This discoloration can be undone by locally heating the surface of the pieces for a short time to approximately 150 C. The heating process can be done by means of a paint stripper, gas burner for shrink foil, a powerful hairdryer, This treatment will not affect the aspect of the coating. All the information given in this Data Sheet is the result of our research work and experience. It is given in good faith and with every belief in its accuracy but cannot be considered as a formal warranty. In accordance with OXYPLAST BELGIUM policy of product development, this specification is subject to change without notice. PE50/ENG-06/13 6

7 OXYPLAST PE50 CURING SCHEDULES Temperature ( C) Time (minutes) Minimum Maximum PE50/ENG-06/13 7

8 OXYPLAST PE50/TRX+9006HR/73/180 OXYPLAST PE50/TRX+9007HR/73/180 COATING RAL9006 & RAL9007 ANNEX TO THE TECHNICAL DATA SHEET PE50 DESCRIPTION OXYPLAST PE50/TRX+9006HR/73/180 and PE50/TRX+9007HR/73/180 are thermosetting polyester powders based on outdoor resistant resins and bonded aluminium pigments with an increased outdoor resistance. Thanks to the special formulation the optimal effect of a RAL9006, resp. RAL9007 will be obtained. APPLICATION With OXYPLAST PE50/TRX+9006HR/73/180 and PE50/TRX+9007HR/73/180 the RAL9006, resp. RAL9007 effect has been optimized. To achieve this result, without any colour differences, these coatings have to be applied in film thicknesses of at least 90 µm. REMARK In contradistinction to the normal RAL-colours, finger marks on metallic coatings cannot be removed by simply rubbing with a cloth. They can nevertheless be easily removed with a soft household detergent. This is why a transparent topcoat is recommended for substrates that are frequently touched. The same topcoat is recommended for applications where colour changes can be caused by friction such as, for example, handrails. PE50/ENG-06/13 8

9 OXYPLAST PE50/M7145/73/180 COATING RAL9006 ANNEX TO THE TECHNICAL DATA SHEET PE50 DESCRIPTION OXYPLAST PE50/M7145/73/180 is a thermosetting polyester powder based on outdoor resistant resins and TGIC-free hardeners. Thanks to the specific formulation, the effect of RAL9006 can be obtained without using any aluminium pigments. DURABILITY This product is a mix of existing PE50/TR powders. The rub resistance is equal to the standard PE50/TR. A transparent topcoat for additional protection is not required. As the standard PE50 coatings, OXYPLAST PE50/ M7145/73/180 meets the most important specifications for coating building materials, namely : QUALICOAT: Certificate number P-0081 GSB (Germany): Certificate number 140b British Standard BS V.M.R. (Netherlands) PE50/ENG-06/13 9

10 OXYPLAST PE50/B+7110/73/180 ANNEX TO THE TECHNICAL DATA SHEET PE50 DESCRIPTION OXYPLAST PE50/B+7110/73/180 is a thermosetting polyester powder based on outdoor-resistant resins and bonded aluminium pigments with an improved outdoor resistance. Thanks to the special formulation an optimal metallic effect will be obtained. The outdoor durability of this system as such is however insufficient. That s why a transparent topcoat is obliged. APPLICATION With OXYPLAST PE50/B+7110/73/180 an optimal metallic effect has been aimed at. To achieve this result, without any colour differences, the applied film thickness should be at least 90 µm. REMARK In contradistinction to the normal RAL-colours, finger marks on metallic coatings cannot be removed by simply rubbing with a cloth. They can nevertheless be easily removed with a soft household detergent. This is why a transparent topcoat is recommended for substrates that are frequently touched. The same topcoat is recommended for applications where colour changes can be caused by friction such as, for example, handrails. PE50/ENG-06/13 10