1、tIIL-E-lbbb3A BO W 777790b 0101734 7 W MI L-E- 1 66 63 A( OS) 9 July 1974 SUPERSEDING MIL-E-16663 (BuOrd) 2 December 1952 MILITARY SPECIFICATION ENAMEL, SEMIGLOSS, (FOR METAL SURFACES OF AMMUNITION AND AMMUNITION CONTAINERS) This specification is approved for use by all departments and agencies of t
2、he Department of Defense. 1. SCOPE 1.1 Scope. This specification covers semi-gloss enamels for production line application by brushing, spraying or dipping. This specification meets Air Pollution Regulations (Rule 66). - 1.2 Classification. Enamels covered by this specification shall be of the follo
3、wing types and classes as specified (see 6.2). Type I - Air drying Class 1 - Rapid drying Class 2 - Flash drying Type II - Baking 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issues in effect on date of invitation for bids or request for proposals form a part of this specification to t
4、he extent specified herein. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-E-Lb6b3A 0 W 7977706 OLOL735 7 MIL-E-1 6663A (OS) SPECIFICATIONS Federal P-D-680 bQ-S-698 TT-B-846 TT-P-143 IT-T-548 STANDARDS Federal FED-STD-1 + 1 FED-STD-595 Military
5、 Dry Cleaning Solvent Steel, Sheet and Strip, Low-carbon n-Butyl Alcohol Paint, Varnish, Lacquer and Related Materials; General Specification for Packaging, Packing and Marking Toluene Paint, Varnish, Lacquer, and Related Materials Methods of Inspection, Sampling and Testing Colors MIL-STD- 1 29 Mar
6、king for Shipment and Storage (Copies of specifications and standards required by contractors in connection with specific procurement functions should be obtained from the procuring agency or as directed by the contracting officer.) 3. REQUIREMENTS 3.1 Color. The color of the enamel shall be as spec
7、ified in the contract or order (see 6.2). When tested as in 4.4.3, it shall match the standard color chip in FED-STD-595, except the gloss of color numbers 10371 , 36 1 18, and 3623 1 shall be disregarded. c 2 I -.z . . Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
8、ense from IHS-,-,-MIL-E-Lbbb3A 0 9999906 0303736 O MIL-E-16663A (OS) 3.2 Composition. 3.2.1 Pigments. The enamel shall consist of suitable opaque pigments together with necessary tinting pigments. Any extenders used shall be acid insoluble siliceous or silicated type. 3.2.2 Vehicle. The vehicle shal
9、l be a phthalic-alkyd resin conforming to the requirements of table I modified with synthetic resins or drying oils together with the necessary driers and volatile solvents to meet the requirements of this specification. Rosin or rosin derivatives shall not be used. 3.2.3 Volatile content. The volat
10、ile content shall conform to the following requirements by volume when tested as in 4.4.4. a. Solvents having an olefinic or cyclo-olefinic type of unsaturation: 5 percent maximum. b. A combination of aromatic compounds with eight or more carbon atoms to the molecule except ethyl benzene: 8 percent
11、maximum. - c. A combination of ethyl benzene, ketones having branched hydrocarbon structures or toluene: 20 percent maximum. d. Total of a + b + c: 20 percent maximum. 3.3 Quantitative requirements. The coating shall conform to the quantitative requirements specified in tables I and II. 3 Provided b
12、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GENERAL QUANTITATIVE REQUIREMENTS Characteristics Minimum Phthalic anhydride, percent by weight of vehicle solids Type I, Class 1 , and Type II Type I, Class 2 26 18 - Calcium oxide, percent by weight of pigment
13、Rosins and rosin derivatives Water, percent by weight of enamel Coarse particles and skins, percent - - by weight of pigment 60 degree specular gloss Viscosity: 25 70 17 4 Package, Krebs Units Reduced, No. 4 Ford Cups, seconds Fineness of grind Drying time: Airdrying, Type I Class 1 Class 2 Class 1
14、Class 2 Class 1 Class 2 Baking, Type II Set to touch, minutes - - Dry hard, minutes - - Full hardness, hours - - Dry hard at 250“ Y- MIL-E-16663A (OS) 4.4.3 Color. In accordance with method 4250 of FED-STD-141 compare the color with the film of enamel on the white carrara giass panel prepared for th
15、e hiding power test and observe for compliance with 3.1. 4.4.4 Volatile content. Determine solvents as in methods 7355 and 7356 of FED-STD-141 for compliance with 3.2.3. 4.4.5 Specular gloss. Draw down the enamel using a 0.0020-inch (0.0040-inch gap clearance) film applicator. Test as specified in m
16、ethod 6101 of FED-STD-141 for compliance with table 1. 4.4.6 Hiding power (contrast ratio). Determine the contrast ratio in accordance with method 4122 of FED-STD-141, except measure the dry film thickness in accordance with method 6183 of FED-STD-141. Use a film applicator that will deposit a 3-inc
17、h wide film with a dry film thickness of 0.0010 inch maximum. Air dry type I for 72 hours. Type II panels shall be baked at 250 * 5“ F for 18 minutes and then air dried for 24 hours. Determine the reflectance and verify the film thickness in the area in which the reflectance was measured. Calculate
18、the contrast ratio and check for compliance with table II. . 4.4.7 Condition in container. Determine package condition in accordance with method 301 1 of FED-STD-141 and observe for compliance with 3.4.1. 4.4.8 Storage stability, partially full container. Determine skinning after 24 hours in accorda
19、nce with method 3021 of FED-STD-141 for compliance with 3.4.1.1. 4.4.9 Viscosity (reduced). Reduce the enamel with thinner conforming to table IV in a ratio recommended by the manufacturer. Test according to method 4282 of FED-STD-141 for compliance with table I. 4.4.10 Drying time. Determine drying
20、 time in accordance with method 4061 of FEDSTD-I 4 1 under referee conditions using a 0.0020-inch (0.0040-inch gap clearance) film applicator. Check for compliance with table I. 9 e -. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-Lhbh3A 0 77
21、777Oh OLOL7q3 Ingredient VM packed level A or C as specified (see 6.2) in accordance with TT-P-143. 5.2 Marking. In addition to any special marking interior packages and exterior containers shall be marked in accordance with MIL-STD-129. 6. NOTES 6.1 The semi-gloss enamels covered by this specificat
22、ion have good weather resistance and are intended for use as exterior surface protective coatings for projectiles, rockets, powder and cartridge tanks and other ammunition, as well as for the identification by color marking of such ammunition. 11 Provided by IHSNot for ResaleNo reproduction or netwo
23、rking permitted without license from IHS-,-,-MIL-E-16663A (OS) c i F C - 6.2 Ordering data. Procurement documents should specify the following: . *-, - -I a. Title, number and date of this specification b. Size of container c. Level of packaging and level of packing d. Type and class e. Color. ., 6.
24、3 The enamel should be purchased by volume, the unit king one U.S. liquid gallon of 23 1 cubic inches at 68“ F (20“ C). 64 Asterisks are not used in this revision to identify changes with respect to the previous issue, due to the extensiveness of the changes. Custodian: Preparing activity: Navy - OS *U. S. GOVERNMENT PRINTING OFFICE: 1974-603- 108.563 12 * Navy - OS (Project No. 80 1 O-N 1 1 6) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
