SPECIFICATION AP-S2911 - APAS

1 SPECIFICATION AP-S2911 POLYURETHANE COATINGS FOR THE PROTECTION OF STEEL IN ATMOSPHERE AP-S2911 , revision 9 Authorised by the Executive Officer - apas Page 1 of 3 Printed document is uncontrolled Copyright CSIRO 2017 Date of issue: 06-09-2017 Editorial Note format change, current reference for The Poisons Standard, modify sub-class 2911/1 to allow for all gloss finishes and, add colour test requirement to Table 1. 1. SCOPE a) This SPECIFICATION applies to two pack solvent borne polyurethane coatings for application to steel structures on which optimum surface preparation can be achieved. b) apas is a registered trademark owned by CSIRO and protected under applicable laws. Use of the trademark or the general scheme is prohibited unless prior approval in writing is obtained from CSIRO via the apas Secretariat. 2. BACKGROUND a) apas document AP-D001 should be read to obtain an overview of how the Australian Paint Approval Scheme operates.

2 B) apas document AP-D177 should be read to obtain an overview of how to participate in the Australian Paint Approval Scheme. c) apas document AP-D192 should be read to obtain an overview of the Australian Paint Approval Scheme product certification system. d) apas certification to this SPECIFICATION may be gained by conformance to the requirements detailed in this SPECIFICATION and those in apas document AP-D192. 3. DEFINITIONS & ACRONYMS General terms There are no terms requiring special definition. Acronyms apas Australian Paint Approval Scheme AS/NZS Australian Standard/New Zealand Standard CSIRO Commonwealth Scientific Industrial Research Organisation SUSMP Standard for the Uniform Scheduling of Medicines and Poisons 4. DESCRIPTION & GUIDE FOR USERS General product description a) This SPECIFICATION provides for two pack solvent borne polyurethane coatings for application to steel structures on which optimum surface preparation can be achieved.

3 These systems are intended to provide a service life in excess of 10 years under Category C3 (Medium) atmospheric corrosivity conditions (refer to AS/NZS ) or in situations where frequent maintenance is impractical. b) Products conforming to apas SPECIFICATION AP-S2911 are intended for the long term protection of steel where a high level of decorative finish is required. c) Where the decorative properties of these coatings are considered important, it is crucial that the appearance of the coating be maintained throughout the life of the coating. Purchasers should obtain the manufacturer's written assurance that the selected colour will have acceptable colour stability for the intended purpose. d) The manufacturer's product/technical data sheet should confirm that the exposure conditions to which the coating system is to be exposed is within the capabilities of that system.

4 E) Where surface preparation is likely to be marginal and surface tolerant coatings are required, reference should be made to apas SPECIFICATION 0156. Technical basis of SPECIFICATION a) Paints complying to sub-class 2911/1 of this SPECIFICATION are based on AS/NZS Paints for steel structures - Full gloss polyurethane (two-pack), with the following modifications; All gloss finishes allowed Minimum volume solids set Increase in exterior durability requirements. b) There are no known equivalent or near-equivalent specifications or standards for sub-class 2911/2 paints. Sub-classes This SPECIFICATION is divided into the following sub-classes; 2911/1 standard isocyanate cured polyurethanes (two-pack), conforms to Paint Reference No. C26 of AS/NZS 2911/2 high durability organically modified polyurethanes, conforms to Paint Reference No. C26 of AS/NZS 5. 6. REFERENCED EREFERENCED DOCU 5. REFERENCED DOCUMENTS This SPECIFICATION makes reference to the following documents; AS/NZS 1580 Paints and related materials methods of test AS/NZS Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings.

5 AS/NZS Paints for steel structures - Full gloss polyurethane (two-pack) AS/NZS documents may be purchased from the Standards Australia website SPECIFICATION AP-S2911 POLYURETHANE COATINGS FOR THE PROTECTION OF STEEL IN ATMOSPHERE AP-S2911 , revision 9 Authorised by the Executive Officer - apas Page 2 of 3 Printed document is uncontrolled Copyright CSIRO 2017 Date of issue: 06-09-2017 The Poisons Standard (the SUSMP), PART 2 CONTROL ON MEDICINES AND POISONS, SECTION SEVEN/Appendix I PAINT OR TINTERS This document is available from the Australian Government - Department of Health - Therapeutic Goods Administration and via the Internet apas document AP-D001 How apas operates apas document AP-D123 Restrictions on Ingredients in Paint Formulations apas document AP-D177 How paint manufacturers participate in apas apas document AP-D192 The apas product certification system All apas Documents may be downloaded from the apas website 7.

6 8. DOCCED DOCUMENTS 6. COMPOSITIONAL REQUIREMENTS Binder R a) For 2911/1 coatings, the binder shall essentially be comprised of a polyester, polyacrylate or other polyol base cured with an aliphatic isocyanate hardener. b) For 2911/2 coatings, the binder shall also incorporate an organic modifier such as fluoropolymer(s) intended to provide the high durability properties required. Pigmentation a) There is no restriction placed on the type(s) of pigment(s). Pigments shall comply with the requirements of The Poisons Standard (the SUSMP) and apas document AP-D123. Volatiles a) The volatile portion shall principally be comprised of oxygenated solvents (such as ketones, esters and glycol ether esters) and chlorinated solvents. Colour a) Products approved under this SPECIFICATION are normally available in a wide range of colours; the manufacturer s colour range (MCR). Refer to the manufacturer s product/technical data sheet for details.

7 7. PRODUCT CERTIFICATION REQUIREMENTS General a) The application for product certification, and the product itself, shall conform to the relevant requirements of apas document AP-D192 for the duration of the application/certification period. b) Interim certification shall be granted for a period of 7 years in the first instance upon demonstrating conformance to the requirements noted in Table 1; with the exceptions of Application properties of aged sample and Resistance to natural weathering. Application properties of aged sample testing to the requirements noted in Table 1 shall be undertaken and reported to apas during the interim certification period. Resistance to natural weathering testing to the requirements noted in Table 1 shall be undertaken during the interim certification period. c) Full certification (renewable) shall be granted to products for a period of 7 years maximum; having demonstrated conformance to Application properties of aged sample and Resistance to natural weathering in addition to on-going conformance to the requirements detailed in Table 1.

8 Technical a) The product shall conform to all the requirements detailed in Table 1 throughout the certification period. Safety & environmental a) The manufacturer s Safety Data Sheet (SDS) must be read and understood prior to using the product. Transportation, handling, usage and storage of the product must be done in accordance to the SDS. SPECIFICATION AP-S2911 POLYURETHANE COATINGS FOR THE PROTECTION OF STEEL IN ATMOSPHERE AP-S2911 , revision 9 Authorised by the Executive Officer - apas Page 3 of 3 Printed document is uncontrolled Copyright CSIRO 2017 Date of issue: 06-09-2017 8. TABLE 1 PERFORMANCE PROPERTIES TEST AS/NZS 1580 METHOD REQUIREMENTS Properties stated in Section 2 Material Requirements of AS/NZS Test methods are stated in Section 2 of AS/NZS The product shall comply with the requirements of Section 2 except Clause Gloss; Gloss: To be reported Non-volatile content by volume Minimum 35% (theoretical calculation using raw material data is permissible).

9 Thinning or mixing properties There shall be no sign of incompatability when thinned at 10% (by volume) using the manufacturer s recommended thinner. Application properties of aged sample or AS/NZS A sample of the product, which has been stored at routine conditions for 12 months, shall exhibit satisfactory application properties when applied by brushing, rolling and spraying. The product shall also comply with the requirements of; The cured film shall be free from defects. The cured film shall withstand a load of kg. Colour - Visual comparison Approximate match Resistance to natural weathering (Category 1) After 72 months exposure at all three exterior atmospheric exposure sites listed in apas document AP-D192, Section 12, the coating shall show no integrity failure at the end of 6 years. The ratings shall be; Checking 0 Cracking 0 Blistering 0 Flaking & peeling 0 Corrosion 0 Accelerated weathering testing (ASTM G154) AS/NZS For sub-class 2911/2, after 4,000 hours the ratings shall be; Discolouration: rating 0 or 1 Percentage change in gloss: 20% of the initial gloss measurement.

10 Readings shall be taken using a 60 head. Checking 0 Cracking 0 Blistering 0 Flaking & peeling 0 Corrosion 0