1、1 INCH - POUND - 21 September 1993 MIL-I-24092D SUPERSEDING 4 May 1989 (See 6.12) MIL-I-24092C MILITARY SPECIFICATION INSULATING VARNISHES AND SOLVENTLESS RESINS FOR APPLICATION BY THE DIP PROCESS This specification is approved for use by all departments and agencies of the Department of Defense. 1.
2、 SCOPE 1.1 Scope. This specification covers clear solvent type varnishes and clear solventless resin systems used to insulate and bond electrical coils and windings. 1.2 Classification. Varnishes and resins are of the following grades, classes, and compositions as specified (see 6.2). Grade lsee 1.2
3、.1) Class Composition (see 1.2.2). (see 1.2.3) CA - Clear, solvent, air-dry 130 and 155 I, II CB - Clear, solvent, baking, 130 to 180 I, II CB - Clear, flexible, baking, 200 and 220 I, II CBH - Clear, solvent, baking, 130 to 200 I, II CBS - Clear, solvent, baking, 180 to 220 I, II flexible varnish s
4、emi-rigid silicone Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, SEA 03442, Naval Sea Systems Command, 2531 Jefferson Davis Hwy, Arlington, VA 22242-5160 by using the self-addressed
5、 Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. I I AMSC N/A FSC 5970 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
6、se from IHS-,-,-MIL-I-24092D Grade (see 1.2.1) SF - Solventless flexible SFT - Solventless flexible thixotropic SH - Solventless semi-rigid SHT - Solventless semi-rigid thixotropic SS - Solventless silicone WB - Water base flexible WBH - Water base semi-rigid PK - Patching kit Class (see 1.2.2) 130
7、to 180 130 to 180 155 to 200 155 to 200 180 to 220 130 to 200 130 to 200 130 and 155 Composition (see 1.2.3) IV IV IV IV IV III III IV 1.2.1 Grade. Grades of material are classified according to composition and function (see 3.1). 1.2.2 Class. Classes are designated in degrees Celsius (“C) according
8、 to the maximum continuous operating temperature. 1.2.3 Composition. Compositions are classified according to the type of solvent or monomer in the varnish or resin, as follows: I - Organic solvent system. II - Organic system in accordance with Rule 442(66). III - Water reducible. IV - Organic monom
9、er or diluent. 1.3 Safety practice. This specification may require the use of hazardous material, operations, and equipment. It is the responsibility of the user to establish appropriate safety practices and to determine the applicability of regulatory limitations prior to use. 2. APPLICABLE DOCUMEN
10、TS 2.1 Government documents. 2.1.1 Specifications. standards. and handbooks. The following specifica- tions, standards, and handbooks form a part of this document to the extent specified herein. Unless.otherwise specified, the issues of these documents are those listed in the issue of the Department
11、 of Defense Index of Spe.cifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL J-W-1177 - Wire, Magnet, Electrical, General Specification. J-W-1177/14 - Wire Magnet, Electrical, Class 200, Type K, Polyester, Polyester-Imide or Polyeste
12、r-Amid-Imide Overcoated With Polyamide-Imide, Round. Polyimide Coated, Round. J-W-1177/15 - Wire, Magnet, Electrical, Class 220, Type M, P-D-680 - Dry Cleaning and Degreasing Solvent. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - e n1-1-2q0q2D
13、 m 99999Ob 1949345 287 MIL- I - 24092D FEDERAL (Continued) PPP-F-320 - Fiberboard; Corrugated and Solid, Sheet Stock PPP-P-1892 - Paint, Varnish, Lacquer, and Related Materials; (Container Grade), and Cut Shapes. Packaging, Packing, and Marking of. MILITARY MIL-D-16791 - Detergents, General Purpose
14、(Liquid, Nonionic). MIL-H-17672 - Hydraulic Fluid, Petroleum, Inhibited. MIL-L-19140 - Lumber and Plywood, Fire-Retardant Treated. MIL-L-17331 - Lubricating Oil, Steam Turbine and Gear, Moderate Service. (See supplement 1 for list of associated specifications.) STANDARDS FEDERAL FED-STD-141 - Paint,
15、 Varnish, Lacquer and Related Materials: Methods of Inspection, Sampling and Testing. FED-STD-313 - Material Safety Data, Transportation Data and Disposal Data for Hazardous Materials Furnished to Government Activities. MILITARY MIL-STD-129 - Marking for Shipment and Storage. (Unless otherwise indic
16、ated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.2 Non-Government publications. The following document(s) form a part of this document to the ext
17、ent 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 the DODISS are the issues of the documents cited in the solicit
18、ation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) A 366 - Standard Specification for Steel, Sheet, Carbon, Cold- D 93 - Standard Test Methods for Flash Point by Pensky-Martens D 115 - Standard Test Methods for Varnishes Used for Electrical D 149 - Standard Test Hethod for Dielectric
19、 Breakdown Voltage and Rolled, Commercial Ouality. (DoD adopted) Closed Tester. (DoD adopted) Insulation. Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies. (DoD adopted) D 374 - Standard Test Methods for Thickness of Solid Electrical Insulation. D 618 - St
20、andard Practice for Conditioning Plastics and Electrical Insulating Haterials for Testing. (DoD adopted) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-24092D ASTM (Continued) D 823 - Standard Test Methods for Producing Films of Uniform Thic
21、kness of Paint, Varnish, and Related Products on Test Panels. (DoD adopted) D 1963 - Standard Test Method for Specific Gravity of Drying Oils, Varnishes, Resins, and Related Materials at 25/25“C. D 2196 - Standard Test Methods for Rheological Properties of Non- Newtonian Materials by Rotational (Bro
22、okfield) Viscometer. (DoD adopted) Ovens for Electrical Insulation. Insulating Varnishes by the Helical Coil Test. Varnishes. Polymers by Thermal Analysis. (DoD adopted) Solid Electrical Insulating Materials by Thermogravi- metric Method. D 4880 - Standard Test Method for Salt Water Proofness of Ins
23、ulating Varnishes Over Enamelled Magnet Wire. E 537 - Standard Test Method for Assessing the Thermal Stability of Chemicals by Methods of Differential Thermal Analysis. F 74 - Standard Practice for Determining Hydrolytic Stability of Plastic Encapsulants for Electronic Devices. D 2436 - Standard Spe
24、cification for Forced-Convection Laboratory D 2519 - Standard Test Method for Bond Strength of Electrical D 3056 - Standard Test Method for Gel Time of Solventless D 3418 - Standard Test Method for Transition Temperatures of D 3850 - Standard Test Method for Rapid Thermal Degradation of (Application
25、 for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA) RE-2 - Electrical Insulating Varnish. (Application for copies should be addressed to the National Electrical Manufacturer
26、s Association, 2101 L Street NW, Suite 300, Washington, DC 20037.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational services.)
27、2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein (except for related specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific
28、 exemption has been obtained. 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with the applicable specification sheet. In the event of any conflict between the requirements of this specification and the specification sheet, th
29、e latter shall govern. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-24092D m 9999906 L949347 05T “ MIL-I-24092D 3.2 Qualification. Varnishes and resins furnished under this specification shall be products which are authorized by the qualif
30、ying activity for listing on the applicable qualified products list at the time of award of contract (see 4.3 and 6.4). 3.3 Material. The varnish or resin shall be suitable for coating electrical equipment using the dip and bake process. If the material is a solvent varnish or a solventless resin, i
31、t shall be clear and unpigmented, except for thixotropic compositions which may contain a small quantity of an opaque mineral filler. The cured film of insulation resulting from the dip and bake process shall be smooth, glossy, and free of surface defects (see 4.7.7). 3.3.1 Recovered materials. Unle
32、ss otherwise specified herein, all material incorporated in the products covered by this specification shall be new and may be fabricated using materials produced from recovered materials to the maximum extent practicable without jeopardizing the intended use. The term “recovered materials“ means ma
33、terials which have been collected or recovered from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used products is allowed under this specification unless otherwise specifically spec
34、ified. 3.3.2 Puritv and uniformity. The packaged components shall be free from all foreign substances, such as grit, dirt, oil, and water. The material shall show no phase separation, gel particles or skin. Ingredient lumps or agglomerates which do not become uniformly part of the compound on mild s
35、tirring are also prohibited. 3.3.3 Toxic products and formulations. The product 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. 3.3.4 Material safetv data sheet. The contracting a
36、ctivity shall be provided a material safety data sheet (MSDS) at the time of contract award. The MSDS shall be supplied in accordance with the requirements of FED-STD-313. The MSDS shall be supplied in accordance with the contract for all material covered by this specification (see 6.7). 3.3.5 Marki
37、ng of hazardous material. Hazardous materials, which may cause personal injury, property damage, or environmental deterioration through transpor- tation, use or disposal, shall be marked in accordance with the requirements of public law and regulations. The marking shall include, as applicable: name
38、 of product, quantity, warning symbol, signal word designating degree of hazard, affirmative statement of hazards, precautionary measures covering actions to be followed or avoided, instructions in case of contact or exposure, antidotes and notes to physicians, instructions in case of fire, spillage
39、, or leakage, instruc- tions for handling and storage, and disposal instructions. Characteristics and operating hazards which require labeling include: toxic, high toxic, irritant, corrosive, strong sensitizer, combustible liquid, flammable, extremely flammable liquid, dangerously reactive, pressure
40、-generation and explosive. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-24092D 3.3.6 Prohibited material. Asbestos and organic silicone shall not be used in the formulation except for silicone in basic silicone varnish systems. Heavy metal
41、s such as lead, cadmium, mercury or arsenic shall not be present. Confor- mance to these requirements shall be verified by using analytical chromatographic or spectroscopic methods. 3.3.7 Unreactive volatiles. For solventless resins only, the product shall contain no unreactive volatile constituents
42、. Conformance to this requirement shall be verified by using vacuum distillation and gas chromatography. 3.3.8 Surface properties. The product (see 6.5.5) shall cure in smooth, thin film. Examination of the cured film on steel panels without magnification shall show no surface defects such as bliste
43、rs, cracks, pinholes or other irregularities that may trap moisture or particulate matter. Non-adhesion, blistering, or flaking shall not occur when the cured surface is coated with common varnish, or resin top coat. 3.3.9 Material properties. Material properties of varnishes and resins shall be as
44、specified in 3.3.9.1 through 3.3.9.23. 3.3.9.1 Storape life. Storage life shall be as specified (see 3.1 and 4.7.1). 3.3.9.2 Nonvolatiles. Nonvolatiles for solvent varnish shall be as specified (see 3.1 and 4.7.2). 3.3.9.3 VaDor pressure. Vapor pressure shall be as specified (see 3.1). 3.3.9.4 WeiEh
45、t loss. Weight loss on cure shall be as specified (see 3.1) 3.3.9.5 Flash point. Flash point shall be as specified (see 3.1 and 4.7.3). 3.3.9.6 Gel time. Gel time for solventless varnishes/resin shall be as specified (see 3.1 and 4.7.4) 3.3.9.7 Drying time. Drying time shall be as specified (see 3.1
46、 and 4.7.5). 3.3.9.8 Viscosity. Viscosity shall be as specified (see 3.1 and 4.7.6). 3.3.9.9 Build. Build shall be as specified (see 3.1 and 4.7.7). 3.3.9.10 Drainane. Drainage shall be as specified (see 3.1 and 4.7.8). 3.3.9.12 Dielectric strength. Dielectric strength shall be as specified (see 3.1
47、 and 4.7.10). 3.3.9.13 Dissipation factor. Dissipation factor shall be as specified (see 3.1). a a O Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-999790b MIL-I-24092D 3.3.9.14 Dielectric constant. Dielectric constant shall be as specified (see 3.1
48、). 3.3.9.15 Hardness. Hardness shall be as specified (see 3.1) 3.3.9.16 Bond strennth. Bond strength shall be as specified (see 3.1 and 4.7.11). 3.3.9.17 Thermal endurance. Thermal endurance shall be as specified (see 3.1 and 4.7.12). 3.3.9.18 Salt water proofness. Salt water proofness shall be as s
49、pecified (see 3.1 and 4.7.13). 3.3.9.19 Hvdrolvtic stability. Hydrolytic stability shall be as specified (see 3.1 and 4.7.14). 3.3.9.20 Chemical resistance. Chemical resistance shall be as specified (see 3.1 and 4.7.15). 3.3.9.21 Varnish mix tolerance. Prior to mixing in the dip tank, varnishes within each grade shall be demonstrated to be compatible. Except for thixotropic varnishes, the mixture shall be clear and shall not separate or contain gelatinous material o
