1、IINCH-POUNDI MIL-1-24718 6 April 1990 MILITARY SPECIFICATION INSUEATPNG RESINS, SOLVENTLESS, VACUUM-PRESSURE-IMPREGNATING; GENERAL SPECIFICATION POR This specification is approved for use by al1 Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers solv
2、entless insulating resins of various compositions and classes for treating and impregnating electrical equipment by the vacuum-pressure-impregnation (VPI) process. 1.2 Classification. Insulating resins shall be provided in the following compositions and classes, as specified (see 6.2). 1.2.1 ComDosi
3、tion. Solventless impregnating resins shall be identified by chemical family and rheological properties, as defined by the individual specifi- cation sheets. The composition description shall identify all primary reactants in the resin formulation (for example, epoxy-Lewis acid, polyester diallyl ph
4、thalate, and so forth) and the rheology required for its end-use application (for example, thixotropic, slightly thixotropic, low viscosity, and so forth). Each specification sheet describes a unique composition. 1.2.2 Classes. Each composition shall be of one of the following class designations. Cl
5、ass is an indication of the thermal endurance (see 4.6.15.1). Class is determined from the temperature index rating in degrees Celsius (“C) at 20,000 hours. Thermal class TeInDerature index range Class 105 Class 130 Class 155 Class 180 Class 200 105 up to but less than 130 130 up to but less than 15
6、5 155 up to but less than 180 180 up to but less than 200 200 up to but less than 220 Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department o
7、f the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. MIL-I-247LA 57.- 7777
8、70b 0426057 7 m MIL-1-24718 2. APPLICABLE DOCUMENTS 2.1 Government -documents. 2.1.1 SDecifications. 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 documen
9、ts 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 -W- 1177 - Wire, Magnet, Electrical, General Specification. P-D-220 - Detergent, General Purpose. PPP-F-
10、320 - Fiberboard: Corrugated and Solid, Sheet Stock PPP-P-1892 - Paint, Varnish, Lacquer, andRelated Materials; (Container Grade), and Cut Shapes. Packaging, Packing and Marking of. MILITARY . MIL-L-17331 MIL-H-17672 MIL-L-19140 MIL-I-24718/1 MIL-1-24718/2 MIL-I-24718/3 MIL-I-24718/4 MIL-C-81302 - L
11、ubricating Oil, Steam Turbine and Gear, Moderate - Hydraulic Fluid,.Petroleum, Inhibited. - Lumber and Plywood, Fire-Retardant Treated, - Insulating Resins, Solventless, Vacuum-Pressure- Impregnating Epoxy-Lewis Acid, Slightly Thixotropic. - Insulating Resins, Solventless, Vacuum-Pressure- Impregnat
12、ing Replenishment Resin, Epoxy-Lewis Acid, Slightly Thixotropic. - Insulating Resins, Solventless, Vacuum-Pressure- Impregnating Polyester Diallyl.Phthalate, Slightly Thixotropic. - Insulating Resins, Solventless, Vacuum-Pressure- Impregnating Replenishment Resin, Polyester Diallyl Phthalate, Slight
13、ly Thixotropic. - Cleaning Compound, Solvent, Trichlorotri- fluoroethane. Service. STANDARDS FEDERAL FED-STD-141 - Paint, Varnish, Lacquer and Related Materials: Methods of Inspection, Sampling and Testing. FED-STD-313 - Material Safety Data, Transportation Data and Disposal Data for Hazardous Mater
14、ials Furnished to Government Activities. (Unless otherwise indicated, 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 Provided by IHSNot for ResaleNo r
15、eproduction or networking permitted without license from IHS-,-,-MIL-1-24718 The following documents form a part of herein. Unless otherwise specified, the are those listed in the issue of the the issues of solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 93 - Standard Tes
16、t Methods for Flash Point by Pensky-Martens D 149 - Standard Test Method for Dielectric Breakdown Voltage and Closed Tester. (DoD adopted) Dielectric Strength of Solid Electrical Insulating . Materials at Commercial Power Frequencies. (DoD adopted) D 150 - Standard Test Methods for A-C Loss Characte
17、ristics and Permittivity (Dielectric Constant) of Solid Electrical Insulating Materials. (DoD adopted) Products (Reid Method). (DoD adopted) Insulation. Testing Paint, Varnish, Lacquer, and Related Products. (DoD adopted) Insulating Materials for Testing. (DoD adopted) Thickness of Paint, Varnish, a
18、nd 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 (Brookfield) Viscometer. (DoD
19、adopted) Hardness. (DoD adopted) Ovens for Electrical Insulation. Insulating Varnishes by the Helical Coil Test. Varnishes. Insulating Varnishes by the Helical Coil Method. Solid Electrical Insulating Materials by Thermogravi- metric Method. Stability of Plastic Encapsulants for Electronic Devices.
20、D 323 - Standard Test Method for Vapor Pressure of Petroleum D 374 - Standard Test Methods for Thickness of Solid Electrical D 609 - Standard Methods for Preparation of Steel Panels for D 618 - Standard Methods of Conditioning Plastics and Electrical D 823 - Standard Test Methods for Producing Films
21、 of Uniform D 2240 - Standard Test Method for Rubber Property - Durometer D 2436 - Standard Specification for Forced-Convection Laboratory D 2519 - Standard Test Method for Bond Strength of Electrical D 3056 - Standard Test Method for Ge1 Time of Solventless D 3145 - Standard Test Method for Thermal
22、 Endurance of Electrical D 3850 - Standard Test Method for Rapid Thermal Degradation of F 74 - Standard Recommended Practice for Determining Hydrolytic (Application for copies should be addressed to the American SOciety for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) 3 Provided
23、 by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1-24718 (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
24、 or other informational-services.) 2.3 Order of wecede-. 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 a
25、nd regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 SDecification 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
26、 and the specification sheet, the latter shall govern. 3.2 First article, When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.4) in accordance with 4.3, 3.3 Materials, The impregnating resin shall be of a chemically curing composition consisting of either one or
27、two components. When there are two components, they shall be completely compatible with only mild stirring. The output of the stirring propeller shall be so that the tanker resin can be stirred within 15-30 minutes, The catalyzed resin shall be designed to provide minimum void in coils processed for
28、 vacuum-pressure-impregnation. The product shall cure (having maximum dielectric strength) completely at a temperature of not more than 200C in a time period of no more than 16 hours, and shall meet all requirements defined on the individual specification sheet. 3.3.1 Recovered materials. Unless oth
29、erwise 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 material
30、s which have been collected or recovered from solid waste and reprocessed to become a source of raw materiais, as opposed to virgin raw materials, None of the above shall be interpreted to mean that the use of used or rebuilt products is allowed under this specification unless otherwise specifically
31、 specified. 3.3.2 Fillers and additives, Fillers and additives may be incorporated by formulators into the product to obtain the properties defined by this specifica- tion. Fillers shall be sized to meet the minimum voids requirement and be evenly dispersed throughout the total volume of-resin., ,Pi
32、liers shall not irrev.ersibly settle during storage of the product, The fillers shall not settle during application or cure, Phase separation of the additives or of the catalyst from the resin shall not occur. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro
33、m IHS-,-,-MIL-1-24718 3.3.3 Purity and uniformftv. On visual inspection of the packaged com- ponents, they shall be free from all foreign substances, such as grit, dirt, oil, and water. The material shall show no gel particles, skin, ingredient lumps, or agglomerates. moxic DrOdUctS. The material sh
34、all have no adverse effect on the health of personnFl-sed.A9 4.6.10 4.6.11 4.6.13 4.6.14 W. A lot shall consist of resin from one process batch or numerous process batches, uniformly blended together in a tank and offered for delivery at one time. If the resin cannot be identified by batch or tank,
35、a lot shail consist of not more than 1,000 gallons blended together and offered for delivery at one time, Catalyst, if required, shall be treated in the same way. 4.4.2 Samples for aualitv conformance tests. The sample shall be made as representative-as possible by agitation or circulation of the lo
36、t before samplihg. From each lot, a representative sample consisting of two 1-quart containers of the resin and appropriate amount of catalyst shall be selected in accordance with method 1031 of FED-STD-141. 4.4.2.1 Lot-reiection. If any sample-is found to be not in conformance with the requirements
37、 of this specification, the lot represented by the sample shall be rejected. ,_ 4.5 Conditioning. tolerances, designations. - and amaratus. 4.5.1 Temperature and humiditv tolerances, Unless otherwise specified, temperature and relative humidity shall be maintained within the tolerances at all times
38、shown in table III. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1-24718 TmLE III. Tolerances. 301 to 325 326 to 500 4.5.2 Conditioning desipnations. Preconditioning, conditioning, curing, and aging conditions shall be designated in accordan
39、ce with the format defined in ASTM D 618. 4.5.3 Chambers and ovens. Chambers and ovens shall be as specified in 4.5.3.1 through 4.5.3.2. 4.5.3.1 High humidity chamber. The chamber shall be a non-corroding container of a standard size, large enough for the apparatus intended to be processed, and the
40、relative humidity shall be maintained as specified in ASTM F 74 using a saturated salt solution of potassium sulfate. 4.5.3.2 Oven. The oven shall be an electrically heated, forced convection type as specified in ASTM D 2436. 4.5.4 Test for prohibited material. Tests for prohibited materials (see 3.
41、3.5), when specified, shall be conducted by a Navy designated laboratory using analytical chromatographic or spectroscopic methods for analysis. 4.5.5 Test for unreactive volatiles. Acceptable verification of conformance to 3.3.6 shall be accomplished using vacuum distillation and gas chromatography
42、 methods. When specified, testing may be done by a Navy designated laboratory. 4.6 Test Drocedures. Tests shall be conducted in accordance with 4.6.1 through 4.6.18. 4.6.1 PreDaration of test specimens. The number and type of test specimens shall be as specified in the applicable test methods and ta
43、ble IV. 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I“ MIL-1-24718 57 m 777770b 042bOb7 8 m - “-_I _ - MIL- I- 24718 TABLE IV. Standard specimens for first article and auality conformance tests. Property Catalyzed storage Vapor pressure Weight
44、loss on cure Flash point Gel point life viscosity at 2 r/min at 20 r/min Shear thinning Build Resin retention Specific gravity Dielectric strength 96/23/50 96/23/96 24/23/water at 25C at 150C at 25OC at 150“ Hardness Bond strength at 25C at 150C Dissipation factor Dielectric constant rhermal enduran
45、ce Saltwater proof lydrolytic stability :hemical resistance Requiremenl 3.5.1 3.5.2 3.5.3 3.5.4 3.5.5 3.5.6 3.5.7 3.5.8 3.5.9 3.5.10 3.5.11 3.5.11 3.5.12 3.5.13 3.5.14 3.5.15 3.5.16 3.5.17 Test 4.6.2 4.6.3 4.6.4 4.6.5 4.6.6 4.6.7 4.6.7 4.6.7 4.6.7 4.6.8 4.6.9 4.6.1C 4.6.11 4.6.11 4.6.11 4.6.12 4.6.1
46、2 4.6.12 4.6.12 4.6.13 4.6.14 4.6.14 4.6.15 4.6.16 4.6.17 4.6.18 Substrate ani dimensions ( inches ) “- “- “- “- “- “- “- “- “- Steel 5 x 3 x 0.032 S tee1 5 x 3 x 0.032 -“ Steel 5 x 3 x 0.032 J x 3 x 0.032 3 x 3 x 0.032 “- “- “- “- “m ?J M2 and K2 i/ M2 and K2 i/ M2 and K2 3rass 1.59 x 5.9 i/ M2 i/
47、M2 - 1/ As required by the test paragraph. 2/ Size 18 AWG magnet wire, in accordance with J-W-1177. J/ In accordance with magnet wire type. - Resir coats “- “- “- “- “- “- “- “ “- 1 1 “- 2 2 2 “- “- “- “- 1 1 1 2 1 1 Specimens tested L/ 1 3 1 3 2 2 2 5 5 1 3 3 3 1 1 1 1 1 “- Y5 u5 1/ 1/ 5 30 10 Prov
48、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-247L8 57 U 7779706 0426068 T U MIL-1-24718 4.6.1.1 Liauid resin. The product shall be brought to laboratory tempera- ture in a closed container at least 24 hours before use. Two-part products shall be
49、 brought to temperature as described above, mixed thoroughly with catalyst, and allowed to stand in a closed container for 24 to 48 hours prior to use. Other than catalyst, no additions shall be made to the as-received resin. 4.6.1.2 Curine of test specimens. Preparation of specimens shall be in accordance with the manufacturers instructions, including curing time and temperature and, if required, catalyst and catalyst/resin ratio. Specimen
