GMNA-9984165-1991.pdf

m 900b3-79 0003641 770 I GENERAL MOTORS ENGINEERING STANDARDS I Materials and Processes - Paint SEALER - BODY SHOP, PAINTABLE, NONWELD THROUGH, PUMPABLE 9964165 1 SCOPE. This specification details the requirements of a 3.1.7 Toxicity. The material must not adversely affect those body shop applied, lacquer paintable, nonweld through, personnel handling it. In addition, the supplier must submit a pumpablc sealer with enhanced wash off resistance The GM Material Safety Data Sheet and receive approval from all material is intended to seal interior and exterior body joints appropriate medical, safety, and Industrial Hygiene Depart- against water, dust and air intrusion. ments before the material can be used in production. 1.1 The material must be a smooth and homogeneous mixture free of air, lumps, unmixed particles and foreign materials. It must be capable of being dispensed with standard production pumping equipment, as recommended by the mated supplier. 3.2 Paf ormancc Requirements. 1.2 The material must adhere to production oily metal substrates, as detailed on the !&ala Substrate Compatibility Charts for each approving division. It must have good weatherability and must not accelerate rusting of steel over which it is applied. 3.2.1 Adhesion. One set of sealer panels per each oily metal substrate as detailed on the Sealer Substrate Compatibility Charts for each approving division, under this specification, shall be prepared per GM98OlP and baked (Lacquer Sys- tems) as follows: 2 REFERENCED STANDARDS. 25 minutes at 157 C +25 minutes at 163 C +20 minutes at 121 C +25 minutes at 163 C GM4298P GM4465P GM9OlOP GM9037P GM9505P GM9763P GM9773P GM98OlP GM9804P GM9828P GM9832P ASTM D638 ASTMDlOO2 ASTM D1475 SAE J1524 SAE J1864 3.2.1.1 The sealer material must not crack nor lose adhesion to the ELPO panel during or after the following conditions: IIlithl: A&r cooling at ambient conditions for a minimum of 24h 3 REQUIREMENTS. Specitk mat&al rquircmmts and appropriate teat methods are Wed under properties. (All bake schedules are specified in metal temperatures.) Exterior Cycle (GM9505P. cycle P): 6 weeks Heat Aging: 336h at 70C 3.1 Physical Properties. 3.1.1 Specific Gravity (ASTM D1475). An individual specif- ic gravity range for each approved source will be set at the time of approval to this specification. This specific gravity range will become a requirement of that material. Salt Spray (GM4298P): 336 h neutral salt spray. Humidity (GM4465P): 168 h at 38 C/100% RH 3.1.2 Solids Content (GM9OlOP) . . . . . . . . . . 95% min by mass 3.1.3 Viscosity (SAE 51524). 3.2.2 Appearance. When topcoated with the appropriate paint systems as detailed on the Sealer Substrate Compatibili- ty Charts for each approving division and baked as described in 3.2.1, the topcoat must not show any loss of gloss, cracking, discoloration, or loss of adhesion to sealant material during or after the following conditions: GiliCe . . . . . . . . . . . . . . . . . . . *. 0.50 mm Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ._. . . . . . . . . . . 275 kPa Samplemass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20g seconds . . . . . The viscosity (in seconds) for each approved source will be set at the time of approval to this specification. That viscosity range will become a requirement of that material. Illitid: After cooling at ambient conditions for a minimum of 24h Exterior Cycle (GM9505P, Cycle F): 6weeks Heat Aging: 336h at 70C 3.1.4 Color . _ Black,grayorcream 3.1.5 Particle size. The material must be capable of passing through a 60 mesh screen. 3.2.3 Cold Slam (GM9773P). Material baked as described in 3.2.1 must not crack nor lose adhesion prior to of after 2 slams at -30 C. 3.1.6 Odor (GM9832P). The sealer must not have a toxic or noxious odor. After curing, the sealer must be relatively non- odorous. In addition, the EDx, value of its odor may be requested at the time of approval. 3.2.4 Tensile (ASTM D638). Material baked as described in 3.2.1 must have a minimum tensile strength of 700 kPa The test speed shall be 2mm/s. MARCH 1991 PAGE 1 9964165 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 19:59:22 MDTNo reproduction or networking permitted without license from IHS -,-,- m 9006379 0003642 607 I GENERAL MOTORS ENGINEERING STANDARDS I Materials and Processes - Paint I SEALER - BODY SHOP, PAINTABLE, NONWELD THROUGH, PUirrlPABLE 9984185 3.2.5 Shear (ASTM D1002). Material baked as described in 3.4 Stability Requirements (GM9763P). Material condi- 3.2.1 must have a minimum shear strength of 1000 kPa. The tioned as described below must be able to pass all require- test speed shall be 2 mm/s. ments of this specification: 3.2.6 Elongation (ASTM D638). Material baked as de- scribed in 3.2.1 must have a minimum elongation of 100%. 3.4.1 Elevated Temperature Stability. The sealer, as shipped, must be capable of withstanding 72 h at 43 C. 3.2.7 Shrinkage (GM9037P). Material baked as described in 3.2.1 must have a maximum shrinkage of 5%. 3.2.8 Porosity. The material must show no sign of trapped air from either an external observation or a sectional view before or after curing. 3.4.2 Low Temperature Stabiity. The sealer, as shipped, must bc capable of withstanding 3 cycles per GM9763P. 3.2.9 Corrosion Resistance. Apply two beads of sealer, 3mmhighx4Ommwidex2OOmmlong,tothesurf&eofa phosphated steel panel (inspect panel first to be sure it is free of surface corrosion). Bake panel for 1 h at 200 C. Remove from oven and allow panel to cool to room temperature. 3.4.3 Storage Stability. The shelf life of the material &aIl be 60 days at temperature not to exceed 35 C. The shelf life of the material commences upon receipt of the material from the manufacturer. 3.2.9.1 Initial Adhesion. The material must exhibit good adhesion to the substrate with no cracking, separation, or other deleterious effects. Remove one sealer bead from surface of panel. There must not be any corrosion on panel surface underneath the scaler bead. 4 SOURCE SHIPMENT RESPONSIBILITY. It will be the responsibility of the supplier to insure that the material is not exposed to temperatures during shipment which would cause the mataial to fail to meet any of the requirements of this specification. 5 INITIAL SOURCE APPROVAL. No shipment shall be made by any supplier until representative initial production samples have been approved by engineering as meeting the requirements of this specification. 3.2.9.2 Humidity (GM4465P). Expose panel for 168 h at 38 C/100% RH. 3.2.9.3 Remove sealer bead from surface of panel after humidity test. There must not be any corrosion on panel surface underneath the sealer. 5.1 Completed copies of the GM Mat&al safety Data Sheet and Critical Material Register (available from the engineering department or laboratory), or equivalent, must be submitted with any new submissions or where a composition change has occurred. 3.3 Process Requirements. 3.3.1 Sag (GM9801P). A 3mm highx40mm wide x 200 mm long bead must not sag more than 5 mm. The material shall bc grease worked 100 strokes before applying the bead. The bead shall be applied immediately after the material is grease stroked. Bach substrate identified on Sealer Substrate Compatibiity Charts, under this specification, must be tested. 3.3.2 Pressure Stability (SAE J1864). The material must be capable of withstanding pumping pressures of 22 400 kPa for 72 h without its viscosity or other characteristics being adversely affected. The separation in ml for each approval source will be set at the time of approval to this specification. The separation will become a requirement for the material. 6 INSPECTION AND REJECTION. Au shipments of material or parts under contract or purchase order manufac- tured to this specification shall be equivalent in every respect to the initial samples approved by engineering. There shall be no changes in either formulation or manufacturing processes permitted without prior notification and approval by engi- neering. Lack of notification by the supplier constitutes grounds for rejection of any shipment. While samples may be taken from incoming shipments and checked for conformance to this specification, the supplier shall accept the responsibili- ty for incoming shipments meeting this specification without dependence upon purchaser s inspection. 3.3.3 Smoke (GM9828P). The sealer must not smoke up to 200 c. 7 APPROVED SOURCES. Engiuccring qualification of an approved source is required for this specification. only sources listed in the GM Corporate Materials File under this specifiition number have been qualified by engineering as meeting the requirements of this specification. Sources are available through the on-line MATSPC System. 3.3.4 Wash off Resistance (G M9804P). After 2 passes, the material must remain on the steel substrate with no loss of material. 8 GENERAL INFORMATION. This is a newly issued standard approved by the Paint Materials Specification committee in October 1990. 9964165 PAGE 2 MARCH 1991 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 19:59:22 MDTNo reproduction or networking permitted without license from IHS -,-,-