1、I MIL-P-L9bOZB 0 9 997930b 0302bb7 L I, - MIL-P-19602B 3 1 July 1974 SUPERSEDING MIL-P-19602A 25 September 1958 MILITARY SPECIFICATION PRIMER, SIZE.COAI“G, BAKING, FOR ROLLER COAT APPLICATION This specification is approved for use by all departments and agencies of the Department of Defense. 1. SCOP
2、E 1.1 This specification covers a size coating (clear or pigmented) to be used in a coating system for roller coat application on metal containers. This specification meets Air Pollution Regulations (Rule 66). 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issues in effect on date of inv
3、itation for bids or request for proposals form a part of this specification to the extent specified herein. SPECIFICATIONS , Federal QQ-T-425 IT-P- 143 Military MIL-E-19603 Tin Plate (Hot Dip and Electrolytic) Paint, Varnish, Lacquer and Related Materials; General Specification for Packaging, Packin
4、g and .Marking Enamel, Gloss, Baking, for Roller Coat Application I FSC 80101 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-19602B STANDARDS . Federal FED-STD- 14 1 . . Paint, Varnish, Lacquer, and Related Materials; Methods of Inspection, Sa
5、mpling and Testing Military MIL-STD- 1 29 Marking 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 Co
6、lor. The size coat shall be a clear or an aluminum pigmented coating. 3.2 Composition. 3.2.1 Pigments. The pigmented size coat shall contain only non-leafing aluminum powder or paste. 3.2.2 .Vehicle. The vehicle shall be an epoxy varnish or a vinyl resin solution. Small amounts of other resins or fi
7、lm formers may be used to impart desired film characteristics. Rosin or rosin derivatives shall not be used (see 4.4.2). 3.2.3 Volatile content. The volatile content shall conform to the following requirements by volume when tested as in 4.4.3, a. Solvents having an olefinic or cyclo-olefinic type o
8、f unsaturation: 5 percent maximum. b. A combination of aromatic compounds with eight or more carbon atoms to the molecule except ethyl benzene: 8 percent maximum. c. A combination of ethyl benzene, ketones having branched hydrocarbon structures, or toluene: 20 percent maximum. d. Total of a + b + c:
9、 20 percent maximum. 2 . I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-P-37602B 80 7777706 0302667 5 MIL-P-19602B 3.3 Quantitative requirements. The coating shall conform to the quantitative requirements specified in table I. Table I QUANTITA
10、TIVE REQUIREMENTS Characteristics I Minimum I Maximum Total solids, percent by weight Clear Pigmented 15 17 Viscosity, No. 4 Ford Cup (sec) I 30 I 75 3.4 Qualitative requirements. 3.4.1 Condition in container. When tested as in 4.4.4 the size coat shall show little or no settling in the freshly open
11、ed package and shall mix readily to a smooth homogeneous state. There shall be no evidence of livering, curdling, or pressure in the can and there shall be no skins or lumps. 3.4.2 Dilution stability. When tested as in 4.4.5 there shall be no evidence of separation or precipitation. 3.4.3 Applicatio
12、n. When tested as in 4.4.6 the size coat shall produce uniform films of 1 to 3 milligrams per square inch dry coating weight (see 6.5). 3.4.4 Baking schedule. The manufacturer shall provide the baking schedule; however, it shall not exceed 10 minutes at 400“ F (metal temperature). 3.4.5 Coating syst
13、em. Panels prepared as in 4.4.7 shall show no lifting of the size coat. 3.4.6 Blocking. When tested as in 4.4.8 none of the size coat shall separate from the coated surface and adhere to or be retained on the uncoated surfaces. A slight tendency of the specimens to stick together will be permissible
14、. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I. - MIL-P-19602B * 3.4.7 Flexibility. When tested as in 4.4.9 the coating system shall not crack, flake or show loss of adhesion at the bend. In addition it shall be capable of withstanding all for
15、ming operations normally employed in fabricating containers without showing evidence of any type of film failure. 3.4.8 Knife test. When tested as in 4.4.10 the coating system shall adhere tightly to the metal and shall show good adhesion between the size coat and the enamel. The film shall not chip
16、 or flake from the metal. 3.4.9 Accelerated weathering. When tested as in 4.4.1 1 the coating system shall show no more than slight chalking (photo no. 8 method 641 1 of FED-STD-141) and a color change equivalent to a lightness index difference not exceeding three units. 3.4.10 Salt spray resistance
17、. When tested as in 4.4.12 the coating system shall show no rust creepage or undercutting beyond one-sixteenth inch from the score mark. At all other points there shall be no rusting or blistering. Upon removal of the coating system the metal substrate shall be free from rusting, pitting, or corrosi
18、on except on the area immediately adjacent to the scor. 3.4.1 1 Toxicity. The size coat shall contain no benzene (benzol), methanol, chlorinated compounds, hydrolyzable chlorine derivatives, or other ingredients which are deemed toxicologically hazardous under normal conditions of usage. 4. QUALITY
19、ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier may use his o
20、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 setforth in the specification where such inspections are deemed necessary to assure suppl
21、ies and services conform to prescribed requirements. . 4.2 Sampling, inspection and testing. Unless otherwise specified, sampling, inspection and testing shall be in accordance with method 103 1 of FED-STD-141. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fr
22、om IHS-,-,-flIL-P-39602B 80 9999906 0302673 3 MIL-P-19602B 4.3 Classification of tests. Testing under this specification shall be for the purpose of acceptance of individual lots. * 4.4 Test methods. 4.4.1 Test conditions. The routine and referee testing conditions shall be in accordance with sectio
23、n 7, FED-STD-141 except as otherwise specified herein. 4.4.2 The following tests shall be conducted in accordance with applicable methods of FED-STD-141 or as required in this specification. The right is reserved to make any additional tests deemed necessary to determine that the roller coat primer
24、meets the requirements of this specification. Table II INDEX Tests Rosin and rosin derivatives in isolated vehicle Volatile content Total solids .Viscosity Condition in container Dilution stability Application Baking schedule Coating system (Preparation of test panels) Blocking Flexibility Knife tes
25、t Accelerated weathering Saltspray resistance Toxicity Applicable method in :ED-STD- 14 1 503 1 7355,7356 404 1 4282 301 1 4203 - - - 6216 622 1 6304 61 52 606 1 - Paragraph of this specifica- tion giving fur- ther references - 4.4.3 - - 4.4.4 4.4.5 4.4.6 4.4.7 4.4.8 4.4.9 4.4.1 O 4.4.1 1 4.4.12 4.4
26、.13 - Paragraph of his specifica- tion giving requirements 3.2.2 3.2.3 Table I Table I 3.4.1 3.4.2 3.4.3 3.4.4 3.4.5 3.4.6 3.4.7 3.4.8 3.4.9 3.4.10 3.4.1 1 5 - i . I? Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-L7b02B 0 = 777770b OL02b72 5
27、= MIL-P-19602B 4.4.3 Volatile content. Determine solvents as in methods 7355 and 7356 of FED-STD-141 for compliance with 3.2.3. 4.4.4 Condition in container. Determine package condition in accordance with method 301 1 of FED-STD-141 and observe for compliance with 3.4.1. 4.4.5 Dilution stability. Re
28、duce the size coat for application according to the manufacturers recommendation and test as in method 4203 of FED-STD-141 for compliance with 3.4.2. 4.4.6 Application. Cut a 4- by 4-inch section from each of three size coated panels which have been baked. Weigh the specimens and then remove the fil
29、m either cathodically or by the use of a solvent. Reweigh and by difference calculate the average coating weight per square inch. Check for compliance with 3.4.3. 4.4.7 Preparation of test panels. Apply the size coat to a dry film weight of 1 to 3 milligrams per square inch to ten (1 O) 4- by 8-inch
30、 tin panels conforming to QQ-T-425 grade 4, class 25 with bright finish. Bake according to the manufacturers recommended schedule. Using eight of the sized panels apply a roller coating enamel conforming to MIL-E-19603 to a dry film weight of 6 to 12 milligrams per square inch. Bake according to the
31、 manufacturers recommendation and use the panels where appliable in the subsequent tests. 4.4.8 Blocking. Cut six 2- by 2-inch specimens from size coated panels prepared as in 4.4.7. Stack the specimens so that the coated surface of the one below is in contact with the uncoated surface of the one di
32、rectly above. Place the stacked specimens in an oven for 24 hours at 120“ f 2“ F with a weight sufficient to exert 10 lbs. per square inch resting on them. Cool to room temperature and pry apart using the pointed end of a needle. Observe for compliance with 3.4.6. 4.4.9 Flexibility test. Determine f
33、lexibility as in method 6621 of FED-STD-141 on 2- by 4-inch section cut from each of two panels prepared as in 4.4.8. After baking the panels according to the manufacturers recommendation, bake for an additional 48 hours at 220“ f 4“ F. Condition at room temperature for one hour and bend over a 1/8-
34、inch mandrel, Examine for compliance with 3.4.7. * Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-LSb02B 80 m 9997906 OL02b73 7 m MIL-P-19602B 4.4.10 Knife test. Perform the knife test as in method 6304 of FED-STD-141 on the flat portion of th
35、e panels from the flexibility test. Check for compliance with 3.4;8. 4.4.11 Accelerated weathering. Perform the test on 3- by 6-inch panels cut from two panels prepared as in 4.4.7. After baking as recommended air dry the panels for 24 hours. Expose for 168 hours to accelerated weathering as in meth
36、od 61 52 of FED-STD-141 using a twin arc apparatus. Examine the exposed panels for chalking by rubbing with a piece of velvet or cheesecloth wrapped around the finger. The rubbing shall be done under moderate pressure by drawing the cloth across the width of the panel in two different locations. Mea
37、sure the directional reflectance (method 6121) on an unrubbed area of the exposed panel and determine the amount of color change, expressed as lightness index difference (AL), using method 6122 of FED-STD-141. Check for compliance with 3.4.9. 4.4.12 Salt spray resistance. Prepare two panels as in 4.
38、4.7. Make an X score across the center of the panels and bend through 180 on a conical mandrel. Expose the panels to salt spray for 168 hours as in method 6061 of FED-STD-141. Face the bend toward the source of the salt fog with the sharp end facing downward. Immediately upon removal wash the panels
39、 gently in running water until free from any visible salt deposits and examine for cornpliance with 3.4.10. . 4.4.13 Toxicity. The manufacturer shall certify that the size coat contains no benzene (benzol), methanol, chlorinated compounds or hydrolyzable chlorine derivatives. 5. PREPARATION FOR DELI
40、VERY 5.1 The size coat shall be furnished in 1-quart or I-gallon multiple friction top containers, in 5-gallon lug cover steel pails or in 55-gallon steel drums as specified (see 6.2). The size coat shall be packaged level A or C; packed level A or C as specified (see 6.2) in accordance with TT-P-14
41、3. .? 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 Intended use. The size coat covered by this specification is intended for use in combination with a gloss enamel coat and with or without a fin
42、al coat of finishing varnish as a coating system for clean tin and terne containers. The system is intended for roller 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-19602B 0 9 7977906 030267q 9 = MIL-P-19602B application to stock metal prio
43、r to fabrication of the containers. This specification in conjunction with MIL-E-19603 is applicable to the coating manufacturer only. If and when required the finishing vamish should conform to MIL-V-21064. . 6.2 Ordering data. Procurement documents should specify the following: a. Title, number an
44、d date of this specification. b. Size of container. c. Level of packaging and level of packing. I 6.3 The size coat should be purchased by volume, the unit being one U.S. liquid gallon of 231 cubic inches at 68“ F (20“ C). 6.4 While the performance requirements of the specification are based on appl
45、ication on clean tin, a primer based on the composition specified will perform equally well over clean teme plate. Although vapor degreasing in this specification is for test purposes only, attention is called to the desirability of adequately cleaning all metal surfaces prior to production applicat
46、ion of the coating. 6.5 During normal production line application, it will be permissible to use additional thinner to maintain proper working viscosity; however, the decrease in viscosity shall not be such that an unsatisfactory coating results. 6.6 Products tested under this specification have not
47、 been tested for compatibility with gloss enamel for roller coating conforming to MIL-E-19603. Compatibility of the coatings should be determined prior to use. 6.7 Asterisks are not used in this revision to identify changes with respect to the previous issue, due to the extensiveness of the changes. Custodians: Army - MR Navy - OS Preparing activity: Navy - OS (Project No. 80 10-0773) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
