1、- MIL-S-5420 0 7777706 OLL2OLIL 7 E MIL-S-G5420(AS) 14 October 1980 MILITARY SPECIFICATION SEALING COMPOUNDS, QUICK REPAIR, LOW TEMPERATURE CURING POLYSULFIDE, FOR AIRCRAFT STRUCTURES This specification is approved or use by the Naval Air System Command, Department of the Navy and is available for u
2、se by all Departments and Agencies of the Depart- of Defense. 1. SCOPE 1.1 Scope: This specification establishes requirements for two types and classes of a two component, low temperature curing, polysulfide, sealing compound for use as a quick-repair material for aiccraft structure. 1.2 Classificat
3、ion. The sealing compound shall be of the following 1-2.1 Types. types and classes, as specified (see 6.2). Type I - Dichromate cure system - . Type II - Manganese, cure system 1.2.2 Classes. . Class A - Suitable for brush application Class B - Suitable for application with extrusion gun or spatula
4、2. APPLICABLE DOCUMENTS 2.1 Issues of documents. The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. Beneficial comments (recommendations, additions, deletions) and any pertinent data
5、 which may be of use in improving this document should be addressed to: *Engineering Specifications and Standards Department (Code 93), Naval Air Engineering Center, Lakehurst, NJ 08733, by using the self-addressed Stand- ardization Document Improvement Proposal (DD Form. 1426) appearing at the end
6、of this document or bv letter. _I NO INFOREIIATION REQUIREMENTS FSC 8030 . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - - - MIL-S-85420 0 7794706 OL1204Z O W MIL-S-85420(AS) SPECIFICATIONS FEDERAL 043-1926 P-D-680 QQ-A-250112 QQ-A-250113 TT-E-7
7、51 TT-1-735 TT-M-261 TT-N-97 TT-s-735 TT-T-548 ccc-c-419 PPP-B-636 MILITARY MIL-H-5606 MIL-D-6998 MIL-L-7808 MIL-A-8625 MIL-T-9046 MIL-L-10547 MIL-P-23377 MIL-L-23699 -Sodium Chloride, Technical -Dry Cleaning Solvent -Aluminum Alloy 7075, Plate and Sheet -Aluminum Alloy Alclad 7075, Plate and Sheet
8、-Ethyl Acetate, Technical -Isopropyl Alcohol -Methyl Ethyl Ketone, Technical -Naphtha, Aromatic -Standard Test Fluids, Hydrocarbon -Toluene, Technical -Cloth, Duck, Cotton, Unbleached, Plied- Yarns, Army and Numbered -Boxes, Shipping, Fiberboard -Hydraul Mis si le -Dich10 r c Fluid, Petroleum Base,
9、Aircraft, and Ordnance methane, Technical -Lubricating Oil, Aircraft Turbine Engine, Synthetic Base -Anodic Coatings, for Aluminum and Aluminum Alloys -Titanium and Titanium Alloy, Sheet, -Liners, Case, and Sheei, Overwrap, Water- Strip and Plate vaporproof or Waterproof, Flexible -Primer Coating, E
10、poxy Polyamide, Chemical and Solvent Resistant -Lubricating Oil, Aircraft Turbine Engines, Synthetic Base Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILITARY (continued) MIL-P-25690 MIL-P-38714 MIL-C-81706 MIL-C-81773 MIL-C-87962 STANDARDS FEDER
11、AL MILITARY MIL-STD-105 -Lubricant, Liquid Fuel and Related Products, Methods o Testing -Sampling Procedures and Tables for Inspection by Attributes MIL-S-85420 (AS) -Plastic, Sheets and Parts, Modified Acrylic Base, Monolithic, Crack Propogation Resistant -Packaging and Packing f Two-Component Mate
12、rials in Semkitc. -Chemical Conversion Materials or Coating Aluminum and Aluminum Alloys -Coatings, Polyurethane, Aliphatic, WeatherResistant -Cloths, Cleaning, for Aircraft Fuel Tanks 3 MIL-STD-129 -Marking for Shipment and Storage (Copies of specifications, standards, drawings and publications re-
13、 quired by contractors ia comection with specific acquisition functions should be obtained from the acquisition activity or as directed by the contracting officer.) 2.2 Other publications. The following documents form a part of this specification to the extent specified hecein. dicated, the issue in
14、 effect on date of invitation or bids or request for proposal shall apply. Unless otherwise in- AMERICAN SOCIETY POR TESTING AND MATERIALS (ASTM) ASTM D 412-75 -Rubber Properties in Tension ASTM D 2240-75 -Rubber Property Durometer Hardness (Applications for copies should be addressed to the America
15、n Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) CONSOLIDATED CLASSIFICATION COMMITTEE Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-S-85420 (AS) Uniform Freight Classification Rules (Application for copies shou
16、ld be addressed to the Consolidated Classi- fication Committee, 202 Chicago Union Station, Chicago, Illinois 60606.) (Technical society and technical association specifications and standards are generally available fur reference from libraries. also distributed among technical groups and using Feder
17、al agencies.) 3. REQUIREMENTS They are 3.1 Qualification. The quick repair sealing compound furnished under this specification shall be a product which is qualified for listing on the applicable qualified products list at the time set or opening o bids (see 4.3 and 6.3). 3.2 Materials. The sealing c
18、ompound shall consist of a base compound which will cure to an elastomeric state upon addition of a sepatate curing agent. 3.2.1 Base compound. The base compound shall be primarily a syn- I thetic rubber of the polysulfide type furnished in the as manufactured color. I I I 3.2.2 Curing agent. The cu
19、ring agent shall be of sufficiently I package (see 5.1.1.2) and shall be identified on the Qualified Products diffexent color from the base compound to easily identify an incompletely mixed system. 3.2.3 Primer. The use of a primer, as recommended by the manu- facturer, is permissible. The primer sh
20、all be included as part of the 3.3 Examination of product. After mixing and extrusion, the compound shall be uniform, free of skins, lumps, gels or coarse particles. 3.4 Performance characteristics. 3.4.1 Application time. Application time of the sealing compound, The sealing compound shall have an
21、application time of 10 I as received and ater long term storage, shall be determined by rate of extrusion. minutes, measured from the start of mix. the minimum application time, in grams per minute, shall be as follows: When tested as specified in 4.8.2, I Class Grams per minute, min. I A 100 B 15 3
22、.4.2 Cure rate characteristics. Cure rate characteristics. as I 4 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.I MIL-S-5q20 80 m 77777Ob OLL2045 b m 4 ! o r c U Y 3 x U C e C e MI L-S -8 5420( AS) via NC ON Ud uu NN vivi w. a UN N(r U % Nrl d 0
23、U-l via NN Nh “Et uw -I- N rl OYI rnm “7 . NN NN UN Ovi vim Ne4 “ h N n .). Y? OU e i Orn bu U 5- .-.- .- .- (_li Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-b . - MIL-S-5420 0 W 7797706 OLL2046 W - -. Adherends (see 4.8.7.1) 1 2 3 4 5 6 (Class B
24、 only) I ) As received After immersion Class A Class B 15 12 15 12 15 12 15 15 15 15 12 15 10 10 10 2 - 2 MIi-S-85420 (AS) -. 1 3.4.3 Physical property characteristics. 3.4.3.1 Nonvolatile content. The minimum percent nonvolatile content of the freshly mixed compound, when tested in accordance with
25、4.8.4, shall be as follows: Percent Nonvolatile content Class A B I - 87 5 92 3.4.3.2 Flow (class B only). When tested as specified in 4.8.5, the class B sealing compound shall flow within the limits of 0.1 to 0.75 inch within the specified test time. 4 3.4.3.3 Specific gravity. The specific gravity
26、 of the cured poly- sulfide shall be no greater than 1.65 when determined in accordance with 4.8.6. 3.4.3.4 Peel strength. The peel strength of the compound, when tested as specified in 4.8.7, shall meet the requirements specified in table II. TABLE II. Peel strength requirements. 3.4.3.5 Tensile st
27、rength and elongation. Tensile strength and elongation minimum values follows : when tested as specified in 4.8.8, shall be as Minimum properties As received After heat aging Tensile strength, psi 200 . 125 Elongation, percent 150 50 - Class A, 100 - Class B 3.4.3.6 Corrosion. When tested as specifi
28、ed in 4.8.9, there shall be no corrosion on the panel under the layer of sealing compound. the sealing compound shall show no signs of deterioration. Additionally, 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-5420 0 m 7797706 OL120Li7 T m
29、MIL-S-85420 (AS) 3.4.3.7 Low-temperature flexibility. The compound shall withstand the bend test as specified in 4.8.10 without cracking, checking, or separation from the panel. 3.4.4 Accelerated crazing (class B) When tested as specified in 4.8.11, the sealing compound shall not craze, crack, or ot
30、herwise chemically degrade the stressed plastic panels, 3.4.5 Hydrolytic stability. When t.ested for hardness after ex- posure as specified in 4.8.12, the specimens shall retain 80 percent of - . their original hardness. 3.4.6 Repairability The sealing compound shall repair minor breaks in itself an
31、d other sealing compounds qualified to this speci- fication. cured film of material as specified in 4.8.13, shall show satisfactory banding, no lifting, blistering, loss of adhesion or other film ir- regularities. strength. 4. QUA type II sealants provide a 4 hour “fly-away” capability and type I -
32、8 hours. 6.1.1 Storage characteristics. The sealing compounds have a mini- mum shelf life of 6 months when stored at temperatures below 80F. the 6 month storage period, the material should be tested to determine its usefulness. at refrigeration temperature (approximately 40F). After In addition, the
33、 6 month shelf life can be extended by storage 6.1.2 Primer. The sealing compounds furnished under this specifi- cation are to be used with the manufacturers recommended primer to obtain optimum results. 6.2 Ordering data. Acquisition documents should specify the following: a. Title, number and date
34、 .of this specification. b. Type and class of sealant required (see 1.2). c. Quantity desired. d. e. Applicable levels of packing required (see 5.2). Any special marking required (see 5.3 and 5.3.1). 6.3 Qualification. With respect to products requiring qual- ification, awards will be made only for
35、products which are at the time set for opening of bids, qualified for inclusion in the applicable Qualified Products List whether or not such products have actually been so listed by that date. The attention of the contractors is called to these re- quirements, and manufacturers are urged to arrange
36、 to have the products that they propose to offer to the Federal Government tested for qualification in order that they may be eligible to be awarded contracts or orders for the products covered by this specification. The activity responsible for the Qualified Products List is the Naval Air Systems C
37、ommand, Washington, D.C. 20361; however, information pertaining to qualification of products may be obtained from the Commander, Naval Air Development Center, Warminster, PA 19874, Attn: ACSTD (Code 6062), the qualifying laboratory. Preparing activity (Project No. 8030-N075) Navy - AS 19 Provided by
38、 IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-85420 BO 77777Ob Oli120bO 2 MIL-S-85420 (AS) SEALING COMPOUND 0.064 QQ-A-250/13, TEMPER T6, KNURL 3/4 X 360-,( BLOWOUT SPECIMEN -3- I I I, I I “ I PRESSURIZED l II CHAHBER I “ I I li II I KNURL 7/8 X 360 DIA
39、 THREAD RUBBER O-RING GASKET 2 X 1 /8 PRESSURE DEVICE MADE OF IN INCHES ALUMINUM ALLOY, DIMENSIONS FIGUm i. Pressure rupture apparatus. 20 2-7/16 1-5/8 DIA DIA -2-1/8 DIA FEMALE THREAD LBLOWOUT SPECIMEN Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,
40、-I-. 125 MATERIAL: 4130 STEEL, CHROMIUt4 PLATED DIMENSIONS IN INCHES TOLERANCES : DECIMALS 2 . O1 6 -_ FIGURE 2. Flow-test fixture. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted w
41、ithout license from IHS-,-,-MIL-S-85420 80 m 777770b OLL2063 8 m MIL -S -85420 (AS) J i / 3. W 23 CS L, O r+ z O ,”- cn W X u z % n CI 2 5 c3 U Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-85420 80 W 7797706 OLL2064 T W MIL 4-8 5420(AS 1 w1.031 VIEW SIIOWI1G SLOTS FOR PAKELS f 2,062 i- ?. 625 MATERIAL J WOOD DfhlENSIONS IK IKCCIIES FIGURE 5. Coiitour Block .- 24 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
