1、 AEROSPACE400 Commonwealth Drive, Warrendale. PA 15096-0001 SPECIFICATIONIssued 1 APR 1984Revised 1 APR 1992Submitted for recognition as an American National Standard Superseding AMS 3267/1SEALING COMPOUND, LOW ADHESION, CORROSION INHIBITING200 to 600 Poises (20 to 60 Pas), 1/2 Hour Application Time
2、 (A-1/2)1. SCOPE:1.1 Form:This specification covers accelerated curing synthetic rubber compounds withcorrosion inhibitors and low adhesive strength supplied as a two-componentsystem.1.2 Application:This product has been used typically for sealing aircraft access doors andaccessories where gaskets a
3、re required, but usage is not limited to suchapplications. Compound is classified as an A-1/2 sealing compound; thecompound being suitable for brush application with a minimum application timeof 1/2 hours after the start of mixing.2. APPLICABLE DOCUMENTS:See AMS 3267.3. TECHNICAL REQUIREMENTS:3.1 Ba
4、sic Specification:The complete requirements for procuring the sealing compound described hereinshall consist of this document and the latest issue of the basicspecification, AMS 3267.3.2 Properties:Compound, mixed in accordance with manufacturers instructions and cured asspecified in the basic speci
5、fication,requirements, determined inshall conform to the followingaccordance with test methods listed in AMS 3267and Table 1.SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineeringsciences. The use of this report is entirel
6、y voluntary, and its applicability and suitability for any particular use, including any patentinfringement arising therefrom, 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 yo
7、urwritten comments and suggestions.Copyright 1992 Society of Automotive Engineers, Inc.All right reserved. Printed In U.S.A.91-0942/EGAMS 3267/1AThe Engineering SocietyFor Advancing MobilityLand Sea Air and SpaceI N T E R N A T I O N A L MATERIALAMS 3267/1A SAE AMS 3267/1ATABLE 1 - PropertiesParagra
8、ph Property Requirement3.2.1 Color3.2.1.1 Base Compound3.2.1.2 After Curing3.2.2 Specific Gravity, maximum3.2.3 Nonvolatile Content, minimum3.2.4 Viscosity of Base Compound(See 4.2)ReddishReddish1.6584% by weight200 to 600 poises (20 to 60 Pas)3.2.5 Flow3.2.6 Application Time (See 4.3)No requirement
9、1/2 hour after the beginning ofmixing, the viscosity shall be2500 poises (250 Pas) maximum3.2.7 Tack-Free Time, maximum 10 hours, measured from the beginningof mixing3.2.8 Hardness (cure time to attain30 Durometer “A“), minimum24 hours3.2.9 Peel Adhesion 4 pounds force per inch (700 N/m ofwidth, max
10、imum; 98% adhesive failure,minimum3.2.10 Resistance to Heat No visual evidence of softening,sponging, blistering, checking,cracking, shrinkage, or powdering3.2.11 Resistance to Salt Water andHydrocarbonsNo visual evidence of softening,blistering, or evidence of corrosion3.2.12 Weight Loss, maximum a
11、ndFlexibility8% weight lossNo cracking when bent3.2.13 Low-Temperature Flexibility No visual evidence of cracking orchecking3.2.14 Accelerated Storage Stability3.2.14.1 Application Time, minimum3.2.14.2 Tack-Free Time, maximum1/2 hour, measured from the beginningof mixing10 hours, measured from the
12、beginningof mixing- 2 - AMS 3267/1A SAE AMS 3267/1ATABLE 1 - Properties (Continued)Paragraph Property Requirement3.2.14.3 Viscosity of base compound3.2.15 Soluble chromate content,minimum100 to 500 poises (10 to 50 Pas)2.5% by weight4. QUALITY ASSURANCE PROVISIONS:See AMS 3267 and the following:4.1
13、Application of Sealing Compound:Unless otherwise specified herein, test panels shall be given threeapplications of sealing compound to produce a coating having a totalthickness of 1/8 inch l/64 (3.2 mm 0.4) when cured. A time equal to therated application life shall be used between applications to p
14、ermit releaseof solvents.4.2 Viscosity of Base Compound:Shall be determined with the base compound placed in a 1 quart (1 L) can.The can shall be filled with base compound to within 1/2 inch (12.7 mm) ofthe top, covered, and stored at 25 C 1 (77 F 2) for not less thaneight hours. The base compound s
15、hall then be thoroughly mixed by stirringslowly for three minutes after which the can shall be closed and the basecompound allowed to stand for one hour. The Brookfield Model RVFviscosimeter, or equivalent, with No. 6 spindle at 10 rpm shall be used andthe readings obtained converted to poises. The
16、highest reading shall betaken after the instrument has run in the compound for one minute.4.3 Application Time:The base compound and accelerator shall be stabilized at standard conditionsfor not less eight hours before a sample of base compound is mixed with theproper amount of accelerator sufficien
17、t to fill a standard 1/2 pint can(1/4 L), 2-7/8 inches (73 mm) in diameter by 2-7/8 inches (73 mm) high, towithin 1/2 inch (12.7 mm) of the top.except when determining the viscosity.The can shall be tightly coveredAt the end of two hours, measuredfrom the beginning of the mixing period, the viscosit
18、y of the sealingcompound shall be determined using a Brookfield Model RVF viscosimeter with aNo. 7 spindle at 10 rpm, or equivalent. One reading shall be taken after thespindle has run in the compound for one minute.5. PREPARATION FOR DELIVERY:See AMS 3267.- 3 -AMS 3267/1A6. ACKNOWLEDGMENT:See AMS 3267.7. REJECTIONS:See AMS 3267.8. NOTES:See AMS 3267.SAE AMS 3267/1A- 4 -
