GMNA-9984446-1990.pdf
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1、m 7006377 0004859 LB bbT GENERAL MOTORS ENGINEERING STANDARDS I Materials and Processes - Paint I REDUCING SOLVENTS FOR PRIMERS 9984446 9984452 9984454 9984464 9984466 9984497 9984499 9984500 1 SCOPE. This specification covers the basic physical, chemical and performance requirements of reducers for
2、 use with various primer materials used on metal and plastic parts. The reducers are covered by specification numbers specific to the primer material with which they are used, described below. These reducers are used to adjust primer application viscosity, overall solvent evaporation for proper appl
3、ication, and film flow after application. The reducers may be individu- al solvents or blends of classes of solvents such as aromatic hydrocarbons, ketones and esters. Reducers approved under each specification are not interchangeable, and must be evaluated and approved for use with each specfic app
4、roved primer material before addition to the applicable approved source list. 1.1 The following primer reducers are covered by this specification: 9984446 - Reducer For 9981207 Lacquer Sealer 9984452 - Reducer For 9984068 Primer Surfacer 9984454 - Reducer For 9984059 In-Line Repair Primer 9984464 -
5、Reducer For 9984058 Final Line Repair Primer 9984466 - Reducer For 99848 16 Flexible Primer 9984497 - Reducer For 9984820 and 9984821 Primers 9984499 - Reducer For 9984076 Spotting Primer 9984500 - Reducer For 9984067 Primer Surfacer 2 REFERENCED STANDARDS. ASTM D56 9984103 ASTM D1012 9984470 ASTM D
6、1078 9984472 ASTM D1298 9984481 9984065 9984506 3 REQUIREMENTS. Materials submitted for qualiiica- tion to this specification must meet all the physical, chemical, and performance requirements. 3.1 Physical Requirements. This specification covers indi- vidual solvents or blends of solvents having a
7、wide range of physical properties. Upon submission, therefore, the follow- ing physical properties shall be provided for each reducer and shall form the specification requirements for all subsequent lots. 3.1.1 Following data shall be provided for each approved product: 3.1.1.1 Distillation Range, C
8、 (ASTM D1078). Initial Boiling Point (Min.) 10% Boiling Point (Min.) 50% Boiling Point (Max.) End (Dry) Point (Max) 3.1.1.2 Flash Point, C (ASTM D56). 3.1.1.3 Specific Gravity at 25C (ASTM D1298). 3.1.1.4 Aniline Point,C (ASTM D1012). 3.2 Chemical Requirements. 3.2.1 Identification. Gas chromatograp
9、hic and infrared analysis will be used to identify, characterize and qualify new materials for approval to this specification. All subsequent lots of the approved material must be compositionally identical to the initial samples submitted for qualification. 3.2.2 Purity. Minimum 99% purity by gas ch
10、romatographic assay. The material must be free of any suspended particles, corrosion products, undissolved water, silicones or any other materials detrimental to the painting process. Product must be essentially colorless and not impart any color to coating materials. 3.2.3 Odor. The odor of the mat
11、erial shall be reviewed in comparison with current production materials. Any signifi- cant change in the materials characteristic odor must be evaluated in a GM approved laboratory and production trial. Any change in formulation must be reassessed for effect on odor. 3.2.4 Hazardous Materials Docume
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