1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2007 07 31 Activated J. Robincheck Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 1 of 10 PAINT, ONE COMPONENT ELASTOMERIC MONOCOAT WSS-M16J14-B1 OVER FLEXIBLE SUBSTRATES, EXTERIOR PAINT, TWO COMPONENT ELAST
2、OMERIC MONOCOAT WSS-M16J14-B2 OVER FLEXIBLE SUBSTRATES, EXTERIOR 1. SCOPE The materials defined by these specifications are elastomeric, monocoat paints applied by a baked process. 2. APPLICATION These specifications were released originally for paints used as the final topcoat on exterior trim comp
3、onents made of flexible substrates, such as fascia, bumper covers, appliqus, cladding. It shall be satisfactory for use over specified primers or over previously baked enamel, as in paint repair or tutone operations. 2.1 LIMITATIONS Bake temperature should not exceed softening temperature of substra
4、te material as agreed upon by Ford Materials Engineering. 3. REQUIREMENTS Testing to be used for initial qualification of materials and shall be made on the basis of comparison with approved production material, chosen by the approving materials engineer. 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MAT
5、ERIALS Material suppliers and part producers must conform to the Companys Standard Requirements for Production Materials (WSS-M99P1111-A). 3.2 COMPOSITION The monocoat shall contain UV absorbers. The supplier will furnish the specific composition and concentration of the absorbers upon request. 3.2.
6、1 Resin Shall be either a polyester, acrylic, modified urethane polymer or a polyurethane. Minor amounts of modifiers and/or plasticizers are allowed. ENGINEERING MATERIAL SPECIFICATIONWSS-M16J14-B1/B2 Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 2 of 10 3.2.2 P
7、igments Pigments are exterior automotive grade selected to match the Ford Motor Company master and meet the durability requirements. 3.2.3 Solvents The volatility of solvents will be such that there shall be no paint sagging, roughness or dry spray at specified film thicknesses. Solvents shall be HA
8、PS compliant if it is required by local government regulations 3.3 PHYSICAL PROPERTIES LIQUID STATE The following evaluation must be conducted on the monocoat at application viscosity. Throughout the application viscosity range, material shall be in compliance with local emission regulations. Proper
9、ty variation acceptability as identified below, shall be based on the recorded values of the originally approved production sample as approved by Ford Materials Engineering. This data will be used in developing control plan requirements. 3.3.1 Non-Volatile Content, range Initial sample +/- 4% (ASTM
10、D 1353) 3.3.2 Volatile Organic Compound, range Initial sample +/- 1% (ASTM D 3960) 3.3.3 Weight per Volume, range Initial sample +/- 0.03 g/ml (ASTM D 1475) 3.3.4 Volume Solids, range Initial sample +/- 2.0% (ASTM D 2697) 3.3.5 Viscosity Report (ASTM D 1200) 3.3.6 Stability No more than 30% (ASTM D
11、1849) viscosity increase permitted. 3.3.6.1 Shelf Stability, 90 days 3.3.6.2 Accelerated Stability, 60C, 16 h 3.3.7 Resistivity 0.005 to 2.00 megohms (ASTM D 5682) Volatile solvents and other components affecting electrical conductivity shall be adjusted such that the resistivity at application visc
12、osity shall be within specified limits. ENGINEERING MATERIAL SPECIFICATIONWSS-M16J14-B1/B2 Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 3 of 10 3.4 PREPARATION OF TEST PANELS 3.4.1 Substrates Flexible polymers and flexible polymer blends, PU, PP, TEO, etc. with
13、a flex modulus (ASTM D 790, Method 1) typically less than 1750 MPa. 3.4.2 Substrate Condition The surface to be coated must be cleaned to ensure the absence of oil or alkaline residues, fingerprints, corrosion, mold release agents, dirt, moisture, and other foreign materials. Surface energy/resistiv
14、ity or chemical reaction(s) enhancements (flaming, corona discharge or plasma) and/or addition of conductive materials, necessary to meet the requirements of this specification, shall be specified on Engineering Documents 3.4.3 Primer Apply 17 - 24 m DFT (Dry Film Thickness) of the primer or as othe
15、rwise recommended, as specified for the substrate. 3.4.4 Monocoat Apply monocoat to required dry film thickness by spray under conditions appropriate for monocoats, and flash as required. Bake using appropriate bake schedule. Record paint and oven type used. (As developed by para 3.5). 3.4.5 Design
16、Verification/Initial Qualification Test Requirements as listed in Table 1 3.4.6 Aging After application of the top coat, all panels shall be aged at least 72 h at 23 +/- 2 C, 50 +/- 5% relative humidity or 16 hours at 45 +/- 1 C before testing. 3.5 PROCESS WINDOW DEFINITION - NEW RESIN TECHNOLOGIES
17、ONLY The supplier shall perform a DOE utilizing response surface analysis to determine the Process Window of the system. The three variables to be included in the design are Bake Time, Bake Temperature, and Film Thickness. An initial screening experiment should be run to determine what level will ge
18、nerate a window which includes testing to failure. This screening experiment should be reviewed with the Materials Engineer to set up the final DOE. Response attributes to the DOE should be based on the materials tested and should include, but not be limited to: Film Thickness (Para 3.6.3, 3.6.4) Ul
19、traviolet Light Transmittance (Para 3.6.5) Adhesion (Para 3.7.1) Water Immersion (Para 3.7.2) Chipping (Para 3.7.8) Environmental Cycling (Para 3.7.9) High Performance Adhesion (Para 3.7.10) Report minimum, maximum, and target values for time, temperature, and film thickness. ENGINEERING MATERIAL SP
20、ECIFICATIONWSS-M16J14-B1/B2 Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 4 of 10 3.6 FILM PROPERTIES 3.6.1 Color (FLTM BI 109-01, SAE J1545 Three Angle CMC) Shall match the Master Approved Sample color panel or the initial sample as approved by Design Center. 3.
21、6.2 Gloss (FLTM BI 110-01, ASTM D 523) Shall match the Master Approved Sample color panel or the initial sample as approved by Design Center. 3.6.2.1 Gloss After Rebake, max 4 unit decrease Rebake panel at target bake conditions per Para 3.5. 3.6.3 Film Thickness, min Report (ASTM B 487, PELT or equ
22、ivalent) Target values shall be defined from process window (Para 3.5) and must be sufficient to meet all requirements of this Specification. Will be specified on the mutually agreed upon control plan. 3.6.4 Film Thickness, max Report, not to exceed (ASTM B 487, PELT or equivalent) 230 micrometers T
23、here shall be no more than 2 in-department repairs. 3.6.5 Ultraviolet Light Transmittance For each color, report the minimum film build of monocoat required to meet a maximum light transmission of no more than 0.1% at 360 nm and 0.5% at 400 nm. Achieving compliance may require the use of a primer-su
24、rfacer. The equipment used for this measurement is an integrating sphere spectrophotometer or equivalent. These values shall be used to help determine minimum film thickness for the process window in section 3.5. 3.6.6 General The paint shall bake out to a presentable serviceable film showing no cra
25、ters, pinholes, seediness, abnormal roughness or excessive metallic mottling. It shall have a reasonable tolerance for ordinary cleaning, and exhibit no dulling or color change when washed with commercially available cleaners. ENGINEERING MATERIAL SPECIFICATIONWSS-M16J14-B1/B2 Printed copies are unc
26、ontrolled Copyright 2007, Ford Global Technologies, LLC Page 5 of 10 3.7 RESISTANCE PROPERTIES 3.7.1 Paint Adhesion Less than 5% paint (FLTM BI 106-01, Method D, knife blade) removal of any paint layer with no complete diamonds removed. Lightly hand sand paint film surface (10 double rubs, moderate
27、pressure) with P600 paper until dull, before scribe operation and checking adhesion. 3.7.2 Water Immersion No blistering, dulling, (FLTM BI 104-01, 240 h) softening, loss of adhesion, and/or any other film failure Adhesion shall be tested according to Para 3.7.1 within 20 minutes after removal from
28、water. 3.7.3 Hydrolysis Resistance No blistering, dulling, (FLTM BI 106-03, 28 days) softening, loss of adhesion, and/or any other film failure Test samples at 14 days and 28 days exposures and must meet the Adhesion testing performance requirements per Para 3.7.1. If an adhesion failure is detected
29、, recheck sample in a different area to verify. 3.7.4 Fluid Spotting Resistance, min Rating 4 - 5 (FLTM BI 168-01, Method A and B, AATCC Evaluation Procedure 1/ISO 105-A02) Test Fluids: (Body and Exterior Trim use) No color dulling, surface distortion or permanent softening permitted. After exposure
30、, adhesion testing performance must be met per Para 3.7.1. 3.7.5 Resistance to Acid Spotting, min Rating 4 - 5 (FLTM BI 113-02, AATCC Evaluation Procedure 1/ISO 105-A02) No color dulling, surface distortion or permanent softening permitted. After exposure, adhesion testing performance must be met pe
31、r Para 3.7.1. 3.7.6 Mar Resistance A AATCC Evaluation procedure 1: Rating 4 max Gloss Change per ASTM D 523 25% loss max Color Change per FLTM BI 109-01 E 2.0 max After 5 years Florida exposure or 5000 h accelerated weathering: AATCC Evaluation procedure 1: Rating 3 max Gloss Change per ASTM D 523 5
32、0% loss max Color Change per FLTM BI 109-01 E 5.0 max 3.9.3.2 Adhesion After Water Immersion 90% adhesion (FLTM BI 104-01, 24 h) retention There shall be no blistering or delamination between any layers of the total paint system. To be evaluated on all exposure intervals. ENGINEERING MATERIAL SPECIF
33、ICATIONWSS-M16J14-B1/B2 Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 9 of 10 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of these specifications. 4.1 HARDNESS (ASTM D 1474) Record va
34、lue at target film and bake conditions. Shall be sufficiently cured at time of packing to withstand normal handling without damage. 4.2 POLISHING A and B Gloss surfaces shall be capable of being sanded with 1200 grit or finer and polished. No noticeable change in gloss or appearance except for a min
35、 of polishing lines shall result. Deep polishing lines or swirl marks are not acceptable. 4.3 WAVESCAN TARGET VALUES (BYK-Gardner or equivalent) Color Target Minimums Light Metallics 55-59/42-46 50/37 Dark Metallics 60-64/47-51 55/42 Light Solids 60-64/47-51 55/42 Dark Solids 65-69/52-56 60/47 4.4 T
36、OPCOAT PROCESSING CONDITIONS REQUIRED FOR PARA 3.6, 3.7, 3.8 AND 3.9. Conditions Topcoat Bake Bake Filmbuild Time Temperature 1 Low Max Max 2 High Min Min 3 Target Target Target Note 1: Control testing panel requirements to be chosen at discretion of approving materials engineer. Note 2: Testing of
37、one specimen is required of every color per each condition listed above. ENGINEERING MATERIAL SPECIFICATIONWSS-M16J14-B1/B2 Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 10 of 10 Table 1, Approval Test Requirements, Design Verification/Initial Qualification NEW P
38、AINT TECHNOLOGY NEW SUBSTRATE NEW COLOR (Existing Pigment/ Resin) Minimum Colors to be Tested: Black, Light Metallic, Dark Metallic Black, Light Metallic, Dark Metallic New Color 3.3 Physical Properties X X X 3.6.1 Color X X X 3.6.2 Gloss X X X 3.6.3-4 Film Thickness X X X 3.6.5 UV Transmission X X
39、X 3.7.1 Adhesion X X X 3.7.2 Water Immersion X X X 3.7.3 Hydrolysis X X 3.7.4 Fluid Spot X Bug & Tar only Bug & Tar only 3.7.5. Acid X X X 3.7.6 Mar Resistance X 3.7.7 Scratch Resistance X X 3.7.8 Chip Resistance X X X 3.7.9 Environmental Cycling X X 3.7.10 High Performance Adhesion X X X 3.8.1 Flexibility X X 3.8.2 Elongation X X 3.9.1, 3 Florida Exposure X 3.9.2, 3 Weatherometer X X X
