LOW SOLAR ABSORBING, COLOUR STABLE …

1 Materials Science & Engineering Div. Highett, Victoria, Australia +61 3 9252 6000 SPECIFICATION AP-S0501 LOW SOLAR absorbing , COLOUR STABLE exterior TOPSIDE PAINT FOR NAVY VESSELS AP-S0501 v3 Printed versions of this document are Uncontrolled Issue date: 1/09/2014 Page 1 of 14 [ ] Copyright CSIRO 2014 Editorial Note This version of the specification contains two Types and two Sub-classes of RAN topcoat. It retains the previous, standard durability, low gloss Storm Grey polyurethane topcoat and introduces the new, high durability polysiloxane topcoats in Storm Grey and RAN Haze Grey colours, both available in low gloss and semi-gloss finishes. During an interim change-over period both the low gloss N42 Storm Grey polysiloxane and the low gloss RAN Haze Grey polysiloxane will co-exist, but after the changeover period the RAN topcoat shall be exclusively a low gloss RAN Haze Grey topcoat using a polysiloxane resin binder.

2 1. SCOPE a) This specification defines and establishes the performance requirements for exterior topside topcoat paints for application to Royal Australian Navy (RAN) vessels. 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 D001 should be read to obtain a broad overview of the Australian Paint Approval Scheme (APAS). b) Manufacturers who wish to participate in APAS within Australia should consult APAS documents D177.

3 C) APAS approval to this specification may be gained by compliance with the requirements detailed in this specification and those in document D192. 3. DEFINITIONS & ACRONYMS General terms There are no terms requiring special definition. Acronyms APAS Australian Paint Approval Scheme ASTM American Society for Testing and Materials BS British Standards CSIRO Commonwealth Scientific and Industrial Research Organisation DFT Dry Film Thickness DSTO Defence Science and Technology Organisation ISO International Standards Organisation NIRR Near Infrared Reflectance RAN Royal Australian Navy TSR Total SOLAR Reflectance VOC Volatile organic compound WHS Workplace Health & Safety 4.

4 DESCRIPTION & GUIDE FOR USERS General product description a) Refer below for descriptions of classes and types available under this specification. b) Type I coatings are durable, COLOUR - STABLE , low-gloss, low SOLAR - absorbing paint topcoats pigmented to AS 2700 N42 Storm Grey COLOUR to be used for the finishing and refinishing of RAN vessels and associated equipment. Together with the recommended primer, they provide a protective air-drying exterior surface in marine atmospheres. The Type I N42 Storm Grey coatings are formulated using polyurethane as the resin binder. To minimise SOLAR heat absorption the coating shall have a Near Infrared Reflectance (NIRR) of at least 65% at 800 nm and shall have a total SOLAR reflectance (TSR) of at least 42% when measured between 300 2500 nm.

5 C) Type II coatings are durable, COLOUR - STABLE , low SOLAR - absorbing paint topcoats pigmented to either AS 2700 N42 Storm Grey COLOUR or US Federal Standard 595C 26270, Haze Gray COLOUR to be used for the finishing and refinishing of Navy vessels and associated equipment. They can be either low gloss (0501/1) or semi-gloss (0501/2). Together with the recommended primer, they provide a protective air-drying exterior surface in marine atmospheres. d) Note that although the RAN Haze Grey topcoat is the same COLOUR as USN Haze Gray, it differs from the US coating in NIRR, metameric requirements, gloss level, TSR and COLOUR and gloss stability. The Type II coatings are formulated using polysiloxane as the resin binder.

6 To minimise SOLAR heat absorption the polysiloxane coatings shall have a NIRR of at least 60% at 800 nm for the RAN Haze Grey COLOUR and a NIRR of at least 65% at 800 nm for the N42 Storm Grey COLOUR and shall have a TSR of at least 42% for N42 Storm Grey and at least 38% for RAN Haze Grey when measured between 300 2500 nm. e) Other colours (for use as markings) may also be required for both Types of products. SPECIFICATION AP-S0501 LOW SOLAR absorbing , COLOUR STABLE exterior TOPSIDE PAINT FOR NAVY VESSELS AP-S0501 v3 Printed versions of this document are Uncontrolled Issue date: 1/09/2014 Page 2 of 14 [ ] Copyright CSIRO 2014 Application a) Both Type I and Type II coatings may be applied by airless or conventional spray with thinning as recommended, or by brush or roller unthinned or as recommended, over a high performance epoxy anticorrosive priming system as recommended by the paint manufacturer.

7 B) The paint system comprising the topcoat and the manufacturer s primer shall be suitable for use over appropriately pretreated and prepared ferrous and non-ferrous metal surfaces, plastics, composites and also over aged APAS 0501 topcoats (both polyurethane and polysiloxane). Technical basis of specification This specification is not based on any known standard or specification. Sub-classes a) This specification is divided into the following sub-classes; 0501/1 Low gloss (12 18 gloss units at 60 ) 0501/2 Semi gloss (45 60 gloss units at 60 ) b) In addition, products certified under this specification may be available in the following types; Type I Standard durability, low SOLAR absorbing , COLOUR STABLE polyurethane (not available in RAN Haze Grey COLOUR ).

8 Type II High durability, low SOLAR absorbing , COLOUR STABLE polysiloxane. 5. REFERENCED DOCUMENTS This specification makes reference to the following documents; AS/NZS 1580 Paints and related materials methods of test AS 2106 Methods for the determination of the flashpoint of flammable liquids AS 2700 Australian COLOUR standards for general purposes ASTM E1164 Obtaining spectro-photometric data for object- COLOUR evaluation ASTM D5402 Assessing the solvent resistance of organic coatings using solvent rubs ASTM G154 Operating fluorescent light apparatus for UV exposure of nonmetallic materials ASTM G155 Operating xenon arc light apparatus for exposure of non-metallic materials ASTM D4541-09 Pull-off strength of coatings using

9 Portable adhesion testers APAS D181 Volatile organic compounds (VOC) limits ASTM G173-06 Tables for reference SOLAR spectral irradiances: Direct normal and hemispherical on 37 tilted surface BS 3900 G2 1965 Resistance to aqueous liquids ISO 11664-4:2008 Colorimetry Part 4: CIE 1976 L*a*b* COLOUR Space Australian standards are available on-line from SAI-Global at Australian Uniform Paint Standard (Appendix I of the Standard for the Uniform Scheduling of Drugs & Poisons) available from Dept of Health Ageing and Therapeutic Goods Administration and on-line at; APAS Document AP-D001 How APAS Operates APAS Document AP-D177 How paint manufacturers participate in APAS APAS Document AP-D192 The APAS Product Approval System All APAS Documents may be downloaded from the APAS web site located at: MIL-PRF-24635E Coating systems, weather-resistant, exterior use 6.

10 COMPOSITIONAL REQUIREMENTS Binder a) Two resin binding systems that can be used to develop COLOUR topcoats that meet the performance specification detailed in Table 1 are; i). Polyurethane (Type I) or ii). Polysiloxane (Type II) based resin systems. b) Appropriately formulated one-pack or two-pack products would be considered. c) One example of a Type I (polyurethane) binder system conforming to the specification could be a solvent borne two-pack system containing a hydroxy-functional resin polymerised from acrylic monomers in one component, and an aliphatic polyisocyanate resin in a second component.