1、SSPC-Paint 45December 16, 20131SSPC: The Society for Protective CoatingsCoating Standard No. 45Two-Component, Thick-Film Polyurea and Polyurea/PolyurethaneHybrid Coatings, Performance-Based1. Scope1.1 This standard contains minimum performance requirements for two types of two-component polyurea coa
2、tings and two types of polyurea/polyurethane hybrid coatings evaluated by laboratory testing.2. Description2.1 General Information: Coatings meeting the requirements of this standard are suitable for use on steel or concrete substrates. These coatings may be applied directly to the substrate or may
3、require the use of a compatible primer, and may be applied in single or multiple coats. These coatings typically have a high film build (greater than 508 micrometers m or greater than 20 mils) and are applied either by plural-component, high-pressure, high-temperature spray equipment, or by plural-c
4、omponent, low-pressure, static-mixer type equipment, depending upon the characteristics of each formulation. 2.2 Service Environments: These coatings are suitable for service in SSPC Environmental Zones 1A (interior, normally dry), 1B (exterior, normally dry), 2A (frequently wet by fresh water, excl
5、uding immersion), 2B (frequently wet by salt water, excluding immersion), 2C (fresh water immersion), and 2D (salt water immersion), or in the following environmental zones defined in ISO 12944-2: C1 (very low corrosivity), C2 (low corrosivity), C3 (medium corrosivity), C4 (high corrosivity), C5-I (
6、very high corrosivity, industrial), C5-M (very high corrosivity, marine), Im1 (fresh water immersion), Im2 (seawater immer-sion), and Im3 (soil immersion). Resistance of these coatings to SSPC Environmental Zones 3B (chemical exposure, neutral), 3C (chemical exposure, alkaline), and 3A (chemical exp
7、osure, acidic) will vary based upon formulation.1Contact the coating manufacturer for specific chemical-resistance data if required.2.3 Performance Levels: Two performance levels based on resistance to deterioration by artificial weathering are provided for coatings meeting the requirements of this
8、standard. Coatings meeting Level 1 are suitable for interior exposure. Coatings meeting Level 2 have demonstrated superior resis-tance to deterioration by artificial weathering (ultraviolet light) and are more appropriate for exterior exposure. 1 SSPC Environmental Zones are defined in “About SSPC S
9、tandards and Guides” available online from .2.4 Resin Types: Coatings meeting the requirements of this standard are typically comprised of polyisocyanate resins and polyamine and /or polyol resin components that react to form polyurea or polyurea/polyurethane hybrid coatings. The isocyanate componen
10、ts are known to be skin and respiratory irritants and sensitizers, and the aromatic amines are consid-ered to be potential carcinogens. The resin blend component is frequently corrosive in nature, and capable of causing other adverse health effects. Refer to material manufacturers Safety Data Sheets
11、 for information on proper personal protective equipment (PPE) and additional safety information.22.4.1 Polyurea (Types 1a and 1b): A polyurea coating is based upon an isocyanate component and a resin blend component composed of amine terminated raw materials.2.4.2 Polyurea/Polyurethane Hybrid (Type
12、s 2a and 2b): A polyurea/polyurethane hybrid coating is based upon an isocyanate component and a resin blend component composed of blends of amine terminated and hydroxyl termi-nated raw materials.2.5 Drying Times: It is possible to formulate both Type 1 and Type 2 coatings as (a) non-hindered, fast
13、-cure coat-ings with typical dry-hard times of less than 2 minutes or (b) hindered3moderate-cure coatings with typical dry-hard times ranging from 2 minutes to less than 30 minutes.2.5.1 Non-Hindered Coatings (Type 1a, and Type 2a, Fast Cure): The components of this type of coating react with each o
14、ther rapidly, giving the coating a short pot life that requires plural-component equipment for spray application. Typical dry-hard times are less than 2 minutes.2.5.2 HinderedCoatings (Type 1b and Type 2b, Moderate Cure): The components of this type of coating react with each other rapidly, giving t
15、he coating a short pot life that requires plural-component equipment for spray application. Typical dry-hard times range from 2 minutes to less than 30 minutes.A summary of the types of coatings covered by this stan-dard is shown on page 2.2 Additional information on regulations and material safety
16、is available at and from SSPC-TU 8, “The Use of Isocyanate-Containing Paints as Industrial Maintenance Coatings.”3 The term “hindered” refers to the use of sterically hindered amino reagents that retard the normally high curing rate of polyurea polymers.SSPC-Paint 45 December 16, 20132Technology Non
17、-Hindered (Fast Cure)Hindered(Moderate Cure)Polyurea Type 1a Type 1bPolyurea/Polyurethane HybridType 2a Type 2b3. Referenced Standards3.1 The latest issue, revision, or amendment of the refer-enced documents in effect on the date of invitation to bid shall govern unless otherwise specified. Those do
18、cuments marked with an asterisk (*) are referenced only in the Notes or Appen-dices, which are not requirements of this standard.3.2. If there is a conflict between the requirements of any of the cited reference documents and this standard, the requirements of this standard shall prevail.3.3 SSPC ST
19、ANDARDS AND JOINT STANDARDS:Guide 13 Guide for the Identification and Use of Industrial Coating Materials in Comput-erized Product Databases* PA 2 Procedure for Determining Compli-ance to Dry Coating Thickness RequirementsPA 9 Measurement of Dry Organic Coating Thickness on Cementitious Substrates U
20、sing Ultrasonic GagesPA 15 Material and Preparation Requirements for Steel Panels Used to Evaluate the Performance of Industrial Coatings3.4 AMERICAN SOCIETY FOR TESTING AND MATE-RIALS (ASTM) STANDARDS:4D412 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers-Tension (Use Die C
21、sample (similar to ASTM D638 with Type IV sample)D471 Standard Test Method for Rubber Property Effect of Liquids* D523 Standard Test Method for Specular GlossD624 Standard Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers (use Die C tear)D638 Standard Test
22、Method for Tensile Prop-erties of PlasticsD714 Standard Test Method for Evaluating Degree of Blistering of Paints* D1296 Standard Test Method for Odor of Vola-tile Solvents and Diluents4 ASTM International, 100 Barr Harbor Road, West Conshohocken PA, 19248. Standards are available online at * D1475
23、Standard Test Method for Density of Liquid Coatings, Inks, and Related Products* D1535 Standard Practice for Specifying Color by the Munsell SystemD1640 Standard Test Methods for Drying, Curing, or Film Formation of Organic Coatings at Room Temperature D1734 Standard Practice for Making Cementi-tiou
24、s Panels for Testing CoatingsD1849 Standard Test Method for Package Stability of PaintD2240 Standard Test Method for Rubber Property Durometer Hardness * D2369 Standard Test Method for Volatile Content of Coatings* D2371 Standard Test Method for Pigment Content of Solvent-Reducible Paints* D2621 Sta
25、ndard Test Method for Infrared Identification of Vehicle Solids from Solvent-Reducible PaintsD4060 Standard Test Method for Abrasion Resistance of Organic Coatings by the Taber Abraser (use H 18 wheel)D4541 Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers* D6132
26、 Standard Test Method for Nonde-structive Measurement of Dry Film Thickness of Applied Organic Coatings Using an Ultrasonic GageD6289 Standard Test Method for Measuring Shrinkage from Mold Dimensions of Molded Thermosetting PlasticsD6943 Standard Practice for Immer-sion Testing of Industrial Protect
27、ive Coatings* D7091 Standard Practice for Nondestructive Measure ment of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous MetalsD7234 Standard Test Method for Pull-Off Adhesion Strength of Coatings on Concrete Using P
28、ortable Pull-Off Adhe-sion Testers E96 Standard Test Method for Water Vapor Transmission of Materials* G14 Standard Test Method for Impact Resistance of Pipeline Coatings (Falling Weight Test)G154 Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic
29、 MaterialsSSPC-Paint 45December 16, 201333.5 AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) STANDARD:5Z129.1 Hazardous Industrial Chemicals Precautionary Labeling3.6 INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONSTANDARD:6ISO 12944 Paints and Varnishes Corrosion protection of steel structures by prote
30、ctive paint systems Part 2: Classification of environments.4. Composition Requirements 4.1 RESIN REQUIREMENT: The resin system shall produce either polyurea-based or polyurea/polyurethane hybrid polymers (see Section 2.3 and Notes 12.1 and 12.2).4.2 ANALYTICAL TEST DATA: If required, the coating man
31、ufacturer shall provide certificates of analysis for coating batches qualified by independent testing to meet this standard for use in verifying batch-to-batch consistency of material (see Note 12.2 and subsections).5. Standard Testing Conditions 5.1 STEEL TEST PANELS: Triplicate panels shall be pre
32、pared for each test unless otherwise required by the standardized method for performance of the test. The hot-rolled steel panels shall conform to SSPC-PA 15. If priming is required by the coating manufacturer, all test panels shall be coated with primer in accordance with the manufacturers written
33、recommendations. 5.2 CONCRETE TEST PANELS: Triplicate panels shall be prepared for each test unless otherwise required by the standardized method for performance of the test. Concrete test panels shall meet requirements of ASTM D1734. Panel size shall be 76 x 152 x 14 millimeters mm (or 3 x 6 x 9/16
34、 inches) or greater unless otherwise specified. If priming is required by the coating manufacturer, all test panels shall be coated with primer in accordance with the manufacturers written recommendations.5.3 APPLICATION: The coating shall be spray applied in a single coat or multiple coats, followi
35、ng the directions on the manufacturers product data sheet.5.4 DRY FILM THICKNESS: The dry film thickness (DFT) of the test panels shall meet the manufacturers written recommended minimum thickness and shall not exceed the minimum by more than 381 m (15 mils) If there is no recom-mended film thicknes
36、s, then the DFT of each coat shall be 1270-1524 m (50 to 60 mils). The DFT on steel test panels shall be measured in accordance the procedure in mandatory 5 American National Standards Institute, 1819 L Street, NW, Washington, DC 20036. Stan-dards are available online at . 6 International Organizati
37、on for Standardization, Case Postale 56, CH-1121 Geneva 20, Swit-zerland. Standards are available online at Appendix A. Note that the DFT requirements of this section are intended for laboratory testing applications, and are not to be considered as requirements for field service (see Note 12.3) The
38、DFT on concrete test panels shall be measured in accordance with SSPC-PA 9 (Restriction Level 3).5.5 CURE: Before any testing, the coating shall be dried and cured in accordance with the manufacturers written recommendations, or otherwise, shall be aged for a minimum of 5 days in an environment with
39、 a relative humidity of 50 10 percent and an ambient temperature of 25 2 degrees C (77 5 degrees F).6. Requirements of Liquid Components6.1 APPLICATION PROPERTIES: All guidance provided by the manufacturer regarding mixing of multi-component products, and special application requirements shall be fo
40、llowed. The coating shall show no streaking, running, or sagging during application or while drying.6.2 PACKAGE STABILITY: Package stability shall be tested in accordance with ASTM D1849. Storage conditions shall comply with the requirements of the manufacturers product data sheets. Change in consis
41、tency greater than 15 percent or noncompliance with the application requirements shall be cause for rejection.7. Physical Tests of Applied Films7.1 DRY TIME: Spray the coating onto test panels of the specified substrate (see Section 5.1 or 5.2) at the maximum thickness recommended by the manufacture
42、r. Test the coating for dry-hard time in accordance with ASTM D1640.7.1.1 A Type 1a or Type 2a (non-hindered) coating must be dry in less than 2 minutes.7.1.2 A Type 1b or Type 2b (hindered) coating must be dry in less than 30 minutes.7.2 TENSILE STRENGTH: A test sample with a thickness of 1270 381
43、m (50 15 mils) or as specified shall have a minimum tensile strength of 10.3 megaPascals MPa (1200 pounds per square inch psi) when evaluated in accordance with ASTM D638, Type IV or ASTM D412, Die C.7.2.1 Tear Strength (Die C tear): When tested in accordance with ASTM D624 a test sample of 1270 381
44、 micrometers (50 15 mils) shall show a minimum Die C Tear equal to or greater than 35 kiloNewtons per meter kN/m (approximately 200 pounds per linear inch pli). 7.2.2 Elongation: When tested in accordance with ASTM D638 Type IV or D412 Die C, the minimum elongation shall be 100% for applications ove
45、r cementitious substrates where substrate cracking could occur and over seam movement areas on steel substrates. The minimum elongation shall be 50 percent for applications over solid metallic substrates.SSPC-Paint 45 December 16, 201347.3 LINEAR CURE SHRINKAGE: When applied over a solid, supported
46、substrate (e.g., steel or concrete), the coating shall show a linear cure shrinkage of less than 1 percent when evaluated in accordance with ASTM D6289 modified as follows: Instead of “injection” into a mold as required in ASTM D6289, the coating is applied to a surface of the “mold cavity.” The mol
47、d surface shall contain a form-release agent to allow the test sample to be removed. Use sample sizes described in ASTM D6289 Section 8.2, Injection-Molding. The coating is allowed to set in the mold cavity, then removed from the mold and allowed to reach final cure before being compared with engrav
48、ed marks in the mold surface to evaluate linear cure shrinkage. When applied over a geotextile or unsupported substrate, the linear cure shrinkage shall be less than 0.5 percent.7.4 ABRASION RESISTANCE: Unless otherwise speci-fied, abrasion resistance shall be evaluated in accordance with ASTM D4060
49、 using CS-17 wheels with 1000-gram g weight loading. After 1000 cycles, the sample shall show less than 50-milligram mg weight loss. If H-18 wheels are specified for this test, the sample shall show less than 250-mg weight loss after 1000 cycles at 1000-g weight loading 7.5 PERMEANCE (CONCRETE APPLICATION ONLY): When tested according to ASTM E96 (desiccant method), the permeance of the coating applied at project-specified thick-ness shall be less than 0.75 perms for non-immersion service or less than 0.10 perms for immersion service. 7.6 ADHESIO
