GMNA-9981412-1990.pdf
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1、m 9006379 0003482 42ll I GENERAL MOTORS ENGINEERING STANDARDS I Materials and Processes - Paint SOLVENT, CHLORINATED, METHYLENE CHLORIDE 9981412 1 SCOPE. This specification covers the physical, chemi- cal and performance requirements of methylene chloride, a very fast evaporating chlorinated hydroca
2、rbon solvent typi- cally used for wiping and cleanup of surfaces prior to other operations. It is also used as a diluent for greases and other materials. 2 REFERENCED STANDARDS. ASTM D56 ASTM D1298 ASTM D1078 3 REQUIREMENTS. Materials submitted for qualiflca- tion to this specification must meet all
3、 the physical, chemical, and performance requirements. 3.1 Physical Requirements. 3.1.1 Distillation Range, C (ASTM D 1078). Initial Roiling Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 min 10% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4、. . . . . . . . . . . . . . . . . 39 mm 50% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Omax End (Dry) Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 max 3.1.2 Flash Point, C (ASTM 056). . . . . . . .
5、. . . . . . . . . . . . . . . . none 3.1.3 Specific Gravity at 25 C (ASTM D1298) . . . . 1.320 to 1.330 3.2 Chemical Requirements. 3.2.1 Identification. Gas chromatographic and infrared analysis will be used to identify, characterize and qualify new materials for approval to this specification. All
6、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 chromatographic assay. The material must be free of any suspended particles, corrosion products, undissolved water, silicones or any
7、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 material shall be reviewed in comparison wtth current production materials. Any signiti- cant change in the material s characteristic
8、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 Documentation. The supplier must provide all required safety documentation per Section 5 upon initial submission. Toxicity and flammabil
9、ity will be assessed by the Hazardous Materials Committee of the using plant to determine conditions for use. The supplier must comply with all governmental regulations regarding proper labelling of hazardous materials. 3.2.5 Solvent Emissions Compliance. The supplier must furnish to the using plant
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