1、MIL-A-461468 21 November 1990 SUPERSEDING MIL-A-46146A 31 March 1981 MILITARY SPECIFICATION ” ADHESIVES-SEALANTS, SILICONE, RTV, NONCORROSIVE (FOR USE WITH SENSITIVE METALS AND EQUIPMENT) SII specification is approved for use by all Departments and Agencies of the Department of Defense. - 1. SCOPE 1
2、.1 Scope. This specification covers three groups of one-part, room temperature-vulcanizing, non-fuel resistant, silicone compounds which cure to durable, rubber sealants and adhesives upon contact with moisture in the air. This specification also covers primers (see 6.1.3) for use with the silicone
3、compounds. 11.1 Limitations. a. Silicone adhesive-sealants covered by this specification are not fuel b. Silicone adhesive sealants in each group liberate alcohol during cure. resistant. 1.2 . Classification. 1.2.1 Groups of silicone adhesive-sealants. The silicone adhesive-sealants shall be classif
4、ied into groups according to their intended use and outstanding property (see 6.1 and 6.2). Group I - General purpose Group II - High strength Group III - High temperature 1.2.2 TypeS.of silicone adhesive-sealants. Each group of silicone adhesive-sealants shall- be subdivided into types as follows (
5、see 6.1 and 6.2). Type I - Thixotropic paste Type II - Self-leveling liquid 1.2.3 Primer. The primer (if required) shall be as recommended by the manufacturer of the silicone-adhesive (see 6.1.3). Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use
6、in improving this document should be addressed to: Director, U.S. Army Laboratory Command, Materials Technology Laboratory, ATTN: SLCMT-MEE, Watertown, MA 02172-0001 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC NO.
7、 A5033 FSC 8040 DISTRIBUTION STATEMENT A Approved for public release; distribution unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-46146B 1.2.4 Military part number codes. The si1 be designated as follows (see 6.4): Example : M46146
8、1 Primer Color Container Size Type Identification Group Identification Specification Identification 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent spec
9、ified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL J-c-30 - Cable and Wire, Electrical (P
10、ower, Fixed Installation) QQ-A-250/4 - Aluminum Alloy 2024, Plate and Sheet QQ-B-613 - Brass, Leaded and Nonleaded: Flat Products (Plate, Bar, Sheet, and Strip) QQ-S-698 - Steel, Sheet and Strip, Low Carbon PPP-B-566 - Boxes, Folding, Paperboard PPP-B-601 - Box, Wood, Cleated-Plywood PPP-B-636 - BOX
11、, Shipping Fiberboard PPP-B-676 - Boxes, Set-up PPP-C-96 - Cans, Metal, 28 Gage and Lighter PPP-C-2020 - Chemicals, Liquid, Dry and Paste: Packaging of PPP-D-705 - Drum: Shipping and Storage, Steel; 16 and 30 Gal PPP-D-729 - Drums: Shipping and Storage, Steel, 55 Gallon (208 PPP-P-704 - Pails, Metal
12、: (Shipping, Steel 1 through 12 Gallon) PPP-T-1637 - Tubes, Shipping, Collapsible Capacity Liters) MILITARY MIL-P-116 - Preservation, Methods of STANDARDS FEDERAL FED-STD-313 - Material Safety Data Sheets, Preparation and Submission of 2 icone adhesive-sealants shall Provided by IHSNot for ResaleNo
13、reproduction or networking permitted without license from IHS-,-,-MLL-A-Llb14bB 80 m 777770b 0458867 2 MIL-A-46146B MI L I TARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by MIL-STD-129 - Marking for Shipment and Storage MIL-STD-130 - Identification, Marking of U.S. property MIL-STD
14、-147 - Palletized Unit Loads Attributes (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.2 Non-Government publications. The f
15、ollowing documents form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in
16、the DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM D149 - Dielectric Breakdown Voltage and Dielectric Strength of Electrical Insulating Materials at Commercial Power Frequencies (Permittivity) of Solid Electrical Ins
17、ulating Materials ASTM D150 - A-C Loss Characteristics and Dielectric Constant ASTM D257 - D-C Resistance or Conductance of Insulating Materials ASTM D412 - Rubber Properties in Tension ASTM D573 - Rubber Deterioration in an Air Oven ASTM D740 - Methyl Ethyl Ketone ASTM D746 - Brittleness Temperatur
18、e of Plastics and Elastomers by Impact ASTM D903 - Peel or Stripping Strength of Adhesive Bonds ASTM D1084 - Viscosity of Adhesives ASTM D1153 - Methyl Isobutyl Ketone ASTM D1298 - Density, Relative Density (Specific Gravity, or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrome
19、ter Method ASTM D2240 - Rubber Property - Durometer Hardness (Application for copies should be addressed to American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) OFFICIAL CLASSIFICATION COMMITTEE Uniform Freight Classification Rules. (Application for copies should be
20、 addressed to the Uniform Classification Committee, 202 Union Station, 516 West Jackson Boulevard, Chicago, IL 60606). NATIONAL MOTOR FREIGHT TRAFFIC ASSOCIATION, INC. National Motor Freight Classification 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH
21、S-,-,-MIL-A-46146B (Application for copies should be addressed to the American Trucking Association, Inc., 1616 P Street, N.W., Washington, DC 20036). (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These docume
22、nts also may be available in or through libraries or other informational services,) 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applica
23、ble laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.21, a sample of adhesive-sealant and primer (when required,) furnished under this specification shall be subjected to the first article examination and all tests of this s
24、pecification as specified in 4.5.3. Two representative containers of the silicone adhesive-sealant and two representative containers of the primer (if required) shall be selected for the tests, Approval of the first article inspection samples by the procuring activity shall not relieve the contracto
25、r of his obligation to supply silicone adhesive-sealant and primer that shall conform to the requirements of this specification. Any change or deviation from the complete inspection responsibility for the performance of the first article inspection shall be as specified by the procuring activity (se
26、e 6.2). 3.2 Material. 3.2.1 Silicone adhesive-sealant. The silicone adhesive-sealant shall be supplied in the group and type as specified (see 6.2) and shall vulcanize at room temperature to produce a rubbery adhesive-sealant to meet the physical and electrical properties of this specification (see
27、4.5.2,2), 3.2.2 Primer. The primer (if required) shall be an air drying liquid. When required, each manufacturer of adhesive-sealant shall supply a suitable primer which shall be furnished with the product. The manufacturer shall certify that the primer, when used with his adhesive meets the require
28、ments for primer within this specification (see 3.4.2). 3.3 Product characteristics. 3.3.1 Uncured silicone adhesive-sealant. The uncured silicone adhesive-sealants shall be in accordance with the requirements of table I. 3,3.1,1 Corrosion. The silicone adhesive-sealant (and primer if required) shal
29、l not cause discoloration or corrosion when tested as follows: a. Corrosion of brass, steel and aluminum over water (see 4.5.3.2.6.1). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-A-YbLqbB BO W 7974706 OL158Bb7 b MIL-A-46146B b. Corrosion of
30、 copper wire by direct contact (see 4.5.3.2.6.2). c, Corrosion of steel and aluminum by direct contact (see 4.5.3.2.6.31. TABLE I. Physical proper Property Total solids content, (%) min !Application rate (grams/min) min Flow (inches) max Viscosity (poises) Tack free time (hours) I L .es of uncured s
31、ilicone adhesive-sealant. Requirements Group I !Group II TYP 1 Type II Brittle point 1 -80% -8 OOF i (-62OC) (-62oC) Hardness, Shore A f 20 15 Durometer, min i l Tensile strength, ! KPa (min)Pa (min) Elongation, percent (min) Peel strength, lb Aluminum lb/in, min Kg/max, min Steel lb/in, min Kg/max,
32、 min 1206 1034 300 150 15 4 0.3 o .1 15 4 0.3 0.1 nts Group II C III -800F (-62OC) 25 (500) 3447 500 40 0.7 40 0.7 L TABLE III. Electrical properties. I Peoperty Requirements Group I, II, III Volume resistivity at 73 3OF, (23 2 2OC) . ohm/cm Dielectric constant 100 to 100,000 Hertz Dissipation facto
33、r 100 to 100,000 Hertz Dielectric strength, Volts/mil at 77O - t 20F (25 2 1%) 75 mil thickness 3.25 max 0.02 max 300 min 6 Test Method ASTM D746 Procedure B ASTM D2240 ASTM D412 (DIE C) ASTM D412 (DIE C) 4.5.3.2.7 4.5.3.2.7 4.5.3,2.7 Test Met hod ASTM D257 ASTM D150 ASTM D150 ASTM D149 c G o Provid
34、ed by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-a * ? MIL-A-LIbLLIbB 80 7994906 OLI58871 LI = MIL-A-46146B 3.4 Marking. A label shall be attached to each container of silicone adhesive-sealant and each container of primer with data as follows: 3.4.1 Adhesi
35、ve sealant. (a) Group and type of silicone adhesive-sealant, and type of primer as applicable. (b) Brief instructions for the storage and care of silicone adhesive-sealant or primer (as applicable) prior to use. (c) If required, a warning relative to toxicity (see 3.5). (dl A warning as to fluid res
36、istance (see 6.1.1). (e) Instructions for use. (f) Each label attached to the containers of silicone adhesive-sealant shall contain application instructions as follows: Application. These one-component adhesive-sealants require moisture from the air to cure. When they are used the following are requ
37、ired: (1) Good ventilation during cure. (2) Full cure before enclosure (7 days minimum for thicknesses over 1/8 inch (3.2 mm), and 14 days minimum for thicknesses over 1/4 inch (6.4 mm). (3) Sufficient moisture to complete cure. (4) Maximum thickness of 1/2 inch (12.7 mm). (5) Maximum glueline of 1
38、inch (25.4 mm) when used between nonporous substrates. 3.4.2. Primer. a) Manufacturers primer identification b) Instructions for storage and storage life c) Instructions for use d) Toxicity warning (if required) e) NOTE: THIS PRIMER IS INTENDED FOR USE WITH MANUFACTURERS I DESIGNATED ADHESIVE-SEALAN
39、T ONLY 3.4.3 Additional marking. Each unit container of primer shall be marked as follows: “CAUTION: APPLY ONLY IN A WELL VENTILATED AREA. KEEP AWAY FROM HEAT, SPARKS AND OPEN FLAME.“ 3.5 Toxicity. The silicone adhesive-sealant and primer shall have no adverse effect on the health of personnel. A ma
40、terial safety data sheet will be submitted in accordance with procedures outlined in FED-STD-313 (see 4.5.3.2.9, 4.5.3.2.10). Questions pertinent to this effect shall be referred by the contracting activity to the appropriate departmental medical service who will act as an advisor to the contracting
41、 agency. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.6 Workmanship. The uncured silicone adhesive-sealant furnished under this specification shall be uniform in quality and consistency and shall be free of agglomerates or foreign particles. T
42、he cured adhesive-sealant shall present an appearance of smooth homogeneity. There shall be no other defect present which might render the end product unsuitable for its intended purpose. The primer shall be homogeneous and contain no foreign matter. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibilit
43、y for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his o
44、wn or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to ensure sup
45、plies and services conform to prescribed requirements. 4.1.1 Responsibility for compliance. All items shall meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of an
46、y inspection requirements in the specification shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing operations, is an acc
47、eptable practice to ascertain conformance to requirements, however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. 4.2 Classification of inspection. The inspection requirements specified here
48、in are classified as follows: a. First article tests (see 4.5.3.1) b. Quality conformance inspection (see 4.5.3.2) 4.3 Sampling. 4.3.1 For examination. Unless otherwise specified a random sample of filled containers shall be selected for examination in accordance with level S-1 Of MIL-STD-105. 4.3.2
49、 E. A lot of silicone adhesive-sealant or primer shall consist of that quantity produced in one continuous operation from one batch of raw materials at one place of manufacture and offered for delivery at one time. 4.3.3 Sampling for tests. Two representative containers of each type of silicone adhesive-sealant and a representative container of primer shall be selected from each lot for all required tests (see 4.5.3). 8 Provided by IHSNot for ResaleNo rep
