Specifications for a Quality Label for Paint, Lacquer and ... - Qualicoat

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AppendicesA3 – Compulsory declaration of changes in formulation for powdersapproved by QUALICOATLike all coatings, powders essentially consist of 4 kinds of components:• binder• pigments• extenders• additivesThese are the powder components that determine the powder's characteristics.1. BINDERThe binder consists of resin(s) + hardening agent together; it imparts the principal characteristics to thepowder (reactivity, application properties, mechanical properties etc.). The main types of resins used inEurope are:• saturated carboxylated polyester• saturated hydroxylated polyester• epoxy• acrylicThese different types of resins can be used with several different kinds of hardeners.It is quite obvious that variations in the chemical composition of the different resins or changes in thechemical molecular structure of the hardening agent can bring about modifications in the properties orcharacteristics of the powder and require a new QUALICOAT approval.2. PIGMENTSPigments can be organic, inorganic or metallic and impart colour, appearance and opacity to thecoating film.3. EXTENDERSExtenders improve the rheological or chemical properties of the final coating.4. ADDITIVESThese are substances added to the powder in small quantities to improve certain characteristics of thecoating (vapour relief, gloss etc.).These other components (pigments, extenders or additives) of powder coating can also have someinfluence on the film properties and characteristics controlled within the QUALICOAT label.Nevertheless, as these constituents can be numerous and varied, it is up to the powder coatingmanufacturers to control their formulations so that they comply with the QUALICOAT label.11 th Edition - 53 - APPENDIX 3
Appendices5. APPEARANCE OF THE FINAL COATINGLike all other coatings, powders – after curing – can give the final coating different appearances, forexample:- a smooth appearance- a structured (grained or textured) appearanceA structured appearance cannot be treated like a smooth appearance. Even if the modification of theformulation is based on special additives, a powder imparting an uneven appearance, which does notinvolve colour gloss or metallic effect, needs a special QUALICOAT approval in a different categoryfrom the approvals granted for smooth powder.11 th Edition - 54 - APPENDIX 3
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SPECIFICATIONSFOR A QUALITY LABELFO
Page 7 and 8: TERMINOLOGYLicence:Approval:General
Page 9 and 10: 2. Test Methods and RequirementsThe
Page 11 and 12: Rating:This sample is good because
Page 13 and 14: 2.8. Impact test(for powder coating
Page 15 and 16: 2.12. Accelerated weathering testEN
Page 17 and 18: For powder coatings, this test is o
Page 19 and 20: Chapter 3Work SpecificationsQUALICO
Page 22 and 23: - Before application, each coating
Page 24 and 25: Chapter 4Approval of CoatingsQUALIC
Page 26 and 27: 7) Impact test (2.8)8) Resistance t
Page 28 and 29: 4.3. Use of the logo by coating man
Page 30 and 31: 5. Licensing of Coating PlantsThis
Page 32 and 33: 5.1.6 Examination of registersThe i
Page 34 and 35: Chapter 6Specifications for In-Hous
Page 36 and 37: 6.1.4 Measuring the drying temperat
Page 38 and 39: 6.3.4 Adhesion test (EN ISO 2409)Th
Page 40: 6.4.3 Control register for finished
Page 43 and 44: AppendicesAppendicesA1 - Regulation
Page 45 and 46: Appendices5.3 Use of the logo by su
Page 47 and 48: AppendicesA2 - Specifications for D
Page 49 and 50: Appendices• Light fastness testTh
Page 51 and 52: AppendicesCheck-list for in-house c
Page 53: Appendicesthe GL's instructions, ke
Page 57 and 58: AppendicesA5 - Special specificatio
Page 59 and 60: AppendicesA6 - Procedure for evalua
Page 61 and 62: Appendicesg) Coating to be appliedQ
Page 63 and 64: Appendices5. RESPONSIBILITYa) Suppl
Page 65 and 66: AppendicesA8 - Specifications for b
Page 67: AppendicesNº YEAR TITLE SPECIFICAT
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Specifications for a Quality Label for Paint, Lacquer and ... - Qualicoat

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