美国防腐涂层涂装指南SSPC-NO.36（英文版）

SSPC-Paint 36June1.2000SSPC:The Society for Protective CoatingsPAINT SPECIFICATION NO.36Two-Component Weatherable Aliphatic Polurethane Topcoat,Performance-Based1.ScopeLevel 2 Florida exposure,initial gloss greater than 80.matched to a specific color.A certain level of accelerated1.1 This specification covers the requirements for aweathering does not necessarily correspond to a particularhigh performance two-component UV-stable polyurethanelevel of atmospheric weathering and they need to be speci-topcoat(ASTMD 16,Type V polyurethane).It is intended forfiedindependently.These are two independent complemen-a topcoat that provides excellent color and gloss retention,tary tests for measuring coating performance.If no level isnot for thick section elastomeric coatings.specified,Level 3 will be assumed.3.Reference Standards1.2 Coatings meeting the requirements of this specifi-cation are generally suitable for exposures in environmentalzones 1A(interior,normally dry),1B(exterior,normally dry).3.1 The standards referenced in this specification are2A(frequently wet by fresh water,excluding immersion).2Blisted in Sections 3.4 through 3.6,and form a part of this(frequently wet by salt water,excluding immersion),3Bspecification.A standard marked with an asterisk ()is(chemical exposure,neutral),and 3C(chemical exposure,referenced only in the Notes,which are not requirements ofalkaline).this specification1.3 The specified coating is intended for application by3.2 The latest issue,revision,or amendment of thebrush,spray,or roller.It is generally applied over a primerreferenced standards in effect on the date of invitation to bidor intermediate coating.shall govern,unless otherwise specified.2.Description3.3 If there is a conflict between the requirements of anyof the cited reference standards and this specification,the2.1 This coating is typically based on a hydroxyl func-requirements of this specification shall prevail.tional polyol resin and an aliphatic polyisocyanate co-reac-3.4 SSPC STANDARD:tant.Guide 13 Guide for the ldentification and Use of2.2 WEATHERING LEVELS:This specification con-Industrial Coating Materials in Computer-tains three levels of accelerated and South Florida weathering performance.Table 1 specifies the amount of time theized Product Databasescoating must perform before noticeable change in order to3.5 AMERICAN SOCIETY FOR TESTING AND MATE-achieve the defined performance level.Polyurethane top-coats are available in a wide range of color and gloss.RIALS(ASTM)STANDARDS:Procurement documents shall state the desired level ofD16performance,exposure method (in accordance with TableTerminology Relating to Paint,Varnish,Lacquer,and Related Products1),color and gloss.For example,a specifier may requireTable 1Time Corresponding to Each Performance LevelAccelerated UV-AFlorida ExposureHours to noticeable change*Months to noticeable change*Level 1500to99912to23Level 21000to199924to48Level 32000 or more48 or moreNoticeable change is defined as a gl