SAE AMS-C-83231A-2001 Coatings Polyurethane Rain Erosion Resistant for Exterior Aircraft and Missile Plastic Parts《FSC 8010 用于飞机外部和导弹塑料零件的抗雨水冲刷聚氨酯涂层》.pdf

1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro

2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 2001 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.

3、A.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-7161 FAX: (724) 776-0243TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS: http:/www.sae.org400 Commonwealth Drive, Warrendale, PA 15096-0001AEROSPACE MATERIAL SPECIFICATIONAMS-C-83231AIssued SEP 1999Revised OCT 2001Supersedin

4、g AMS-C-83231Coatings, Polyurethane, Rain Erosion Resistant forExterior Aircraft and Missile Plastic Parts1. SCOPE:1.1 Scope: This specification covers the requirements for two classes and two types of rain erosion resistant coatings. 1.2 Application: These products have been used for protecting gla

5、ss fabric reinforced plastic laminates and other plastic parts used for exterior surfaces of aircraft and missiles, but usage is not limited to such applications. (See 8.2)1.3 Classification: The coatings shall be of the following classes, types and compositions as specified. (See 8.2.)Class A Polyu

6、rethane prepolymers which are not dependent on moisture or high relative humidity for curing (see 8.5).Type I Rain erosion resistant coating.Type II Antistatic rain erosion resistant coating.Class B Polyurethane prepolymers which are dependent on moisture or high relative humidity for curing (see 8.

7、5).Type I Rain erosion resistant coating.Type II Antistatic rain erosion resistant coating.AMS-C-83231A SAE AMS-C-83231A- 2 -1.4 Safety - Hazardous Materials: While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous mate

8、rials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all person

9、nel involved.2. APPLICABLE DOCUMENTS: The issue of the following documents in effect on the date of the purchase order form a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When th

10、e referenced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply.2.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.AS5505 Requirements for Accreditation of Testing Laboratories for

11、 Organic CoatingsAS9100 Quality Systems - Aerospace - Model for Quality Assurance in Design, Development, Production, Installation and ServicingPD2000 Procedures for an Industry Qualified Product Management Process2.2 ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken,

12、PA 19428-2959.ASTM D 93 Flash Point by Pensky-Martin Closed Cup TesterASTM D 471 Rubber Property - Effect of LiquidsASTM D 1014 Conducting Exterior Exposure Tests of Paints on SteelASTM D 1296 Odor of Volatile Solvents and DiluentsASTM D 1475 Density of Liquid Coatings, Inks, and Related ProductsAST

13、M D 1644 Non-Volatile Content of Varnishes (Discontinued 1998, no replacement)ASTM D 2196 Rheological Properties of Non-Newtonian Materials by Rotational (Brookfield type) ViscometerASTM D 2369 Volatile Content of CoatingsASTM D 4420 Aromatics in Finished Gasoline by Gas ChromatographyAMS-C-83231A S

14、AE AMS-C-83231A- 3 -2.3 U.S. Government Publications: Available from DODSSP Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.MIL-PRF-5425 Plastic Sheet, Acrylic, Heat ResistantMIL-A-8625 Anodic Coatings, For Aluminum and Aluminum Alloys MIL-PRF-25134 Remover,

15、Paint and Lacquer, Solvent TypeMIL-P-25421 Plastic Materials; Glass Fiber Based-Epoxy Resin, Low Pressure LaminatedMIL-R-7705 Radome, General Specification for (Canceled, no superseding document)FED-STD-141 Paint, Varnish, Lacquer, and Related Materials; Methods of Inspection.Sampling and TestingU.S

16、. Air Force 535 Free Diisocyanate Test MethodU.S. Air Force Bulletin 535 Free Diisocyanate Test MethodHUD Federal Hazardous Substances Labeling Act49CFR 171-178 Department of Transportation (DOT) Regulations for the Transportation of Explosives and Other Dangerous Articles by Land and Water3. TECHNI

17、CAL REQUIREMENTS: 3.1 Qualification: 3.1.1 All products sold to this specification shall be listed, or approved for listing on the qualified products list. PRI QPL AMS-C-83231. To qualify, the product shall meet the tests specified in section 4.4.3.1.2 Qualification testing, review of test results,

18、approved, reapproval and recertification of qualification for QPL listing shall be in accordance with PD2000.3.1.3 Recertification of qualification is required every five years. Recertification consists of a letter certifying that there have been no changes in the material ingredients, manufacturing

19、 processes, or site of production since qualification and that the product meets all of the requirements of this specification. In addition a test report shall be provided from a lab of the manufacturers choosing, showing compliance with all of the qualification tests.3.2 Materials: The coating mate

20、rial shall be of a polyurethane type formulated from a chemically curing composition of such ingredients as may be necessary to produce high quality materials. The coating materials shall cure completely at standard conditions. The Class A coatings shall contain only cycloaliphatic or aliphatic isoc

21、yanate (see 8.5).AMS-C-83231A SAE AMS-C-83231A- 4 -3.2.1 Toxic Products and Formulations: The material shall have no adverse effect on the health of personnel when used for its intended purpose and applied in approved facilities with the use of approved safety equipment. Questions pertinent to this

22、effect shall be referred by the procuring activity to the appropriate department medical service who will act as an advisor to the procuring agency.3.3 Components: 3.3.1 Class A, Types I and II: The Class A coatings shall be a polyurethane prepolymer vehicle which can be polymerized with a curing ag

23、ent at standard conditions without dependence on moisture or high relative humidity. Unless otherwise specified, class A, type I coating components shall be individually packaged and furnished as a kit. The kit shall consist of the following: a primer plus primer activator; polyurethane prepolymer v

24、ehicle plus the curing agent; and a thinning solvent. For class A, type II coatings, an anti-static film shall be applied to the surface of the type I coating. The class A, type II coating kit shall consist of all the components required for the class A, type I kit plus the antistatic polyurethane p

25、repolymer vehicle and the curing agent. Class A coatings shall be applied by spray or brush techniques. 3.3.2 Class B, Types I and II: The class B coatings shall be moisture curing polyurethane prepolymers, of which the polymerization may be accelerated by a catalyst. The class B coatings can be pol

26、ymerized at standard temperature conditions but are dependent on moisture or high relative humidity. The polymerization rate can be accelerated by the use of a catalyst. Unless otherwise specified, class B, type I coating components shall be individually packaged and furnished as a kit. The kit shal

27、l consist of the following: a primer plus primer activator: polyurethane prepolymer vehicle plus a catalyst when applicable; and a thinning solvent. For class B, type II coatings, an antistatic film shall be applied to the surface of type I coating. The class B, typed II coating kit shall consist of

28、 all the components required for the classB, type I kit plus the antistatic polyurethane vehicle and the catalyst when applicable. ClassB coatings shall be applied by brush or spray techniques.3.4 Quantitative Requirements: The quantitative requirements of the coatings shall be as specified in Table

29、 1.AMS-C-83231A SAE AMS-C-83231A- 5 -3.4.1 Polyurethane Prepolymers (Free Diisocyanate Content): The free diisocyanate content of the polyurethane prepolymers for classes A and B, types I and II coatings shall be not greater than 1percent when tested as specified in 4.9.2 and Appendix.3.5 Qualitativ

30、e Requirements: 3.5.1 Mixing: Components of classes A and B, types I and II coatings shall be individually mixed in accordance with the manufacturers instructions. The resulting individual mixtures shall be smooth, homogeneous materials free from lumps, gelling, seeding, separation or other objectio

31、nal characteristics.3.5.2 Odor: The odor of the wet coatings shall not be obnoxious when tested as specified in 4.9.TABLE 1 - Quantitative Requirements - Classes A and BComponentNonvolatile(Solids Content)% by Weight, minDensity,kg/L (lb/gal)Viscosity,CentipoisesFlashPointC (F), minPrimer(Mixed comp

32、onents, ifapplicable)10.0 0.839 (7.0) 100-400 10 (50)CLASS AType I, Polyurethane Prepolymer40 0.899 (7.5) 250-500 10 (50)Type II, Polyurethane Prepolymer40 0.899 (7.5) 250-500 10 (50)Antistatic PolyurethanePrepolymer50 0.899 (7.5) 900-1500 10 (50)CLASS BType I, Polyurethane Prepolymer45 0.959 (8.0)

33、130-500 10 (50)Type II, Polyurethane Prepolymer45 0.959 (8.0) 130-400 10 (50)Antistatic PolyurethanePrepolymer35 0.899 (7.5) 900-1500 10 (50)AMS-C-83231A SAE AMS-C-83231A- 6 -3.5.3 Color: Classes A and B coatings shall be tinted black. The color shall be sufficiently intense when the specified film

34、thickness is applied that the sub-surface is completely hidden.3.5.4 Accelerated Storage Stability: Classes A and B coatings shall be subjected to 4 days of accelerated storage. At the end of the 4 day storage period, the component materials shall be free of lumps, skins and gels and shall disperse

35、readily to a smooth homogeneous mixture when tested in accordance with 4.9.6.3.5.5 Shelf Storage Life: When stored as specified in 4.9.7, classes A and B coatings shall meet all the requirements of this specification except that the minimum viscosity in Table 1 shall not have decreased by more than

36、10 percent from the specified value and the maximum viscosity in Table 1 shall not have increased by more than 10 percent above the specified value.3.5.6 Pot Life: Classes A and B coatings shall have a minimum pot life of 4 hours at standard conditions. At the end of the 4 hour period, the coatings

37、shall show no signs of lumping, seeding, separation or an increase in viscosity of more than 20 percent from the initial viscosity.3.5.7 Application and Drying Time: The class A and B coatings shall be applied in accordance with the manufacturers instructions to a total dry film thickness of 0.31 to

38、 0.36 mm (0.012 to 0.014 inch)(12 to 14 mils). The total application time, including priming and intervals between coatings shall not exceed 8 hours. The tack free drying time for class A coatings shall not exceed 4 hours after application of the final coating when tested in accordance with 4.9.9. T

39、he tack free drying time for class B coatings shall not exceed 10 hours after application of the final coat when tested in accordance with 4.9.9.3.5.7.1 Rate-of-Cure: The rate-of-cure of the classes A and B coatings shall have a maximumset-to-touch or recoat time of one hour. For class B materials,

40、the manufacturer shall furnish instructions for catalyzing or accelerating the polyurethane prepolymer materials for a temperature range from 18 to 35 C (65 to 95 F) and a relative humidity range from 40 percent to 75 percent.3.5.8 Curing Time: Class A coatings shall be fully cured within 5 days and

41、 shall be free of pinholes, cracks, bubbles or other film irregularities. Class B coatings shall be fully cured within 10 days and shall be free of pinholes, cracks, bubbles, or other film irregularities.3.5.9 Peel Strength: Class A coatings shall have a peel strength of not less than 1126 N/m(7 pou

42、nds per inch) and class B coating shall have a peel strength of not less than 1751 N/m(10 pounds per inch) when tested in accordance with 4.9.11.3.5.10 Flexibility: Films of the coatings shall show no cracking or loss of adhesion in the bend area when tested in accordance with 4.9.14.3.5.11 Water an

43、d Aromatic Fuel Resistance: After immersion in water and fuels, the coatings shall show no evidence of blistering, swelling, checking, or visible color change. After immersion, the peel strength shall not decrease to less than 7 pounds per inch when tested in accordance with 4.9.12 and 4.9.13.AMS-C-

44、83231A SAE AMS-C-83231A- 7 -3.5.12 Rain Erosion Resistance: Class A types I and II coatings, and class B types I and II coatings shall not erode through a 0.31 to 0.36 mm (0.012 to 0.014 inch) (12 to 14 mils) thick coating when tested as specified in 4.9.15 and Table 3.3.5.13 Electrical Transmission

45、: Class A types I and II coatings and class B types I and II coatings shall have a minimum electrical transmission of 85, 90 or 95 percent when tested as specified in 4.9.17 and Table 3.3.5.14 Surface Resistivity: The surface resistivity of the class A, type II coating shall be not less than 0.5mego

46、hms nor more than 15 megohms per square when tested as specified in 4.9.18 and Table3.3.5.15 Weather Resistance: Class A, types I and II coatings and class B, types I and II coatings, when exposed to outdoor weathering for 6 months shall show no film deterioration such as chalking, checking, crackin

47、g, embrittlement, loss of adhesion, or loss of resiliency. After weathering, the coatings shall meet the surface resistivity requirements as specified in 3.5.14.3.5.16 Strippability: Newly applied, fully cured and weathered Class A, types I and II and class B, typesI and II coatings shall be easily

48、strippable when tested as specified in 4.9.21.3.5.17 Repairability: The cured coatings shall be repairable as specified by the manufacturer.4. QUALITY ASSURANCE PROVISIONS: 4.1 Quality System of Manufacturer: Before submitting a product for qualification to this specification for the purpose of bein

49、g listed on the PRI QPL, the manufacturer must have a quality system in place which holds a third party accreditation to AS9100.4.2 Responsibility for Inspection: The manufacturer of the coating compound shall supply all samples for manufacturers tests and shall be responsible for the performance of all required tests. Purchaser reserves the right to sample and perform any confirmatory testing deemed necessary to ensure that the coating compound conforms to the requirements of this specification.4.3 Classification of Inspections: The inspection requirements specified herein are classif