1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 02 2012 05 21 N Status No usage or replacement N. Benipal, NA 2005 07 29 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.8 and 4 1991 02 05 Released Released GAM, John A. Faunt, MP Controlled document at www.MATS Copyright 2012, Ford Global Tec
2、hnologies, LLC Page 1 of 6 CLEAR TOPCOAT, UV CURABLE, ABRASION RESISTANT, ESB-M80J4-A TRANSPARENT ACRYLIC PARTS NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a weatherable, clear, UV curable, multi-functional monomeric resin solution. 2. APPLICATION This specif
3、ication was released originally to describe the typical properties necessary for a clear protective coating either applied directly to a acrylic lamp lens or applied over pad stamp ink, paint or other decorative treatment applied to the lens. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION
4、MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.3 COMPOSITION 3.3.1 Vehicle A multi-functional monomeric resin with a UV absorber blended in an appropriate manner to meet all the requirements of this spec
5、ification. Minor amounts of modifiers and/or plasticizers are allowed. 3.3.2 Specific Composition The supplier will furnish the specific composition of the formulation upon request. 3.4 PHYSICAL PROPERTIES 3.4.1 Viscosity, Package 20 - 30 mPa.s (ASTM D 2196, Brookfield RVT #2 at 20 RPM) 3.4.2 Non-Vo
6、latile, min 40% This procedure is a modification of FLTM BI 102-01 and ASTM D 2369. Since the coating contains reactive monomers and oligomers that will evaporate during the forced air drying, a cure cycle must be incorporated before drying. ENGINEERING MATERIAL SPECIFICATION ESB-M80J4-A Copyright 2
7、012, Ford Global Technologies, LLC Page 2 of 6 Equipment Required: . Laboratory balance . Desiccator with desiccant . 10 mL disposable syringe . Cotton gloves . Laboratory UV curing unit . Aluminum foil dish - 3 dishes per sample . Forced draft oven, Type IIA or Type IIB as specified in ASTM E 145 P
8、rocedure: . Determine weight of an aluminum foil dish. Record weight as (W1). . Mix the sample until homogeneous. If air bubbles are observed stir by hand until the air is removed. . For coatings believed to have a nonvolatile content 60%: Use the syringe to transfer 0.30 +/- 0.10 g of the coating i
9、nto a tared aluminum foil dish. Record weight as (S). Place the sample immediately into a UV curing unit capable of 300 watts/in output. Cure the sample for 45 seconds at full power. . For lower nonvolatile coatings: Use the syringe to transfer 0.50 +/- 0.10 g of the coating into a tared aluminum fo
10、il dish. Record weight as (S). Flash sample for at least 5 minutes then place the sample into a UV curing unit capable of 300 watts/in output. Cure the sample for 45 seconds at full power. . Remove the sample from the UV curing cabinet then, place the sample into a forced air oven set at 175 C for 5
11、 minutes to volatilize residual photoinitiators. Air should be present to inhibit thermal polymerization of residual reactive diluent. . Remove the sample from the oven, place into a desiccator. When cool, weigh the sample and record as (W2). . Calculate weight solids (NV %): W2 - W1 NV % = - x 100
12、S 3.4.3 Volume Non-Volatile, at Application Viscosity, min 34% (EPA Method No. 24) Volatile Organic Compounds, max 0.50 kg/L Allowable Content at Application Viscosity (ASTM D 2369, Procedure B) ENGINEERING MATERIAL SPECIFICATION ESB-M80J4-A Copyright 2012, Ford Global Technologies, LLC Page 3 of 6
13、3.4.4 Density 0.90 +/- 0.03 kg/L (ASTM D 1475) 3.5 PREPARATION OF TEST PANELS Prepare according to the following procedure: 3.5.1 Panels Unless otherwise specified, thermoplastic or thermosetting plastic materials, 2.5 - 4.0 mm thick of any convenient size, representative of production material. The
14、 panels shall be cleaned by an acceptable commercial process to remove mold release agents, fingerprints, oils, dirt, moisture and any other surface contamination prior to coating. 3.5.2 Clear Topcoat Apply sufficient clearcoat to achieve 20 - 30 micrometers dry film thickness. Cure clear topcoat pe
15、r manufacturers recommendation. Film Thickness (FLTM BI 117-01) Procedure: Substitute a steel panel for the thermoplastic panel, (para 3.5.1), apply topcoat and cure per manufacturers recommendation. Measure film thickness on the steel panel. Record all readings. 3.6 APPEARANCE 3.6.1 Color, max Clea
16、r, Yellowness Index, YI 3.00 (ASTM D 1925) 3.6.2 Gloss (FLTM BI 110-01, 60 glossmeter) Not more than a 10% decrease in gloss relative to the uncoated plastic. 3.6.3 Clarity (ASTM D 1003) . Haze may not increase by more than 0.5% from the uncoated plastic. . Luminous transmittance may not decrease by
17、 more than 0.5% from the uncoated clear plastic. 3.6.4 General The coating when cured shall be a presentable serviceable film showing no craters, pinholes, seediness or abnormal roughness. ENGINEERING MATERIAL SPECIFICATION ESB-M80J4-A Copyright 2012, Ford Global Technologies, LLC Page 4 of 6 3.7 FI
18、LM PROPERTIES 3.7.1 Film Hardness Shall be sufficiently hard at time of packing to withstand normal handling. 3.7.2 Adhesion (FLTM BI 106-01) No more than 1% loss of adhesion. 3.7.3 Abrasion Resistance, max 15% increase in haze (FLTM BN 108-02, Taber Abrader, CS-10 wheel, 500 g load, 300 cycles) 3.7
19、.4 Water Resistance, min 240 h (FLTM BI 104-01) Test Method: Immerse the panels for 240 h in distilled or deionized water maintained at 32 +/- 1 C. Remove parts from the water and immediately scribe an “X“ through the coating to the substrate. Dry the scribed area with a paper towel, cloth or air pr
20、essure and immediately apply, with firm thumb pressure, a min of 13 cm2 of 3M 898-2 tape. Remove the tape by pulling one end at 90 angle at a moderate speed. The following conditions shall be basis for rejection: . Removal of paint beyond 1.6 mm from the scribe line. . Any evidence of blistering or
21、dulling of the coating on the test panel. . Evidence of loss of adhesion of the coating. 3.7.5 Thermal Shock Resistance (FLTM BI 107-05) The enamel shall exhibit no blister or loss of adhesion when subjected to the following cycles: . 4 h water immersion . 4 h minimum exposure at -29 C. . Direct ste
22、am blast along the scribed “X“. Hold the steam wand 50 - 75 mm from the panel at an angle of 45 from the plane of the “X“. 3.7.6 Resistance to Water and Soap Spotting (FLTM BI 113-01) Discoloration, max None ENGINEERING MATERIAL SPECIFICATION ESB-M80J4-A Copyright 2012, Ford Global Technologies, LLC
23、 Page 5 of 6 3.7.7 Resistance to Acid Spotting (FLTM BI 113-02), except use of colorimeter is omitted) The coating shall exhibit no more dulling or color change than the approved master sample on file in the Exterior Materials Section at Body Engineering. 3.7.8 Chemical Resistance (48 h at 23 +/- 4
24、C) Test Fluids: . Tar remover (petroleum base), Ford Service Part Number B7A-19520-A. . Windshield washer fluid, (methanol/detergent base with ethanolamine), Ford Service Part Number E2FZ-19549-AA. Dilute antifreeze 1:1 with distilled water for test. Test Procedure: Wipe the entire coated surface of
25、 the panel with a 150 mm square soft cotton cloth (folded into a 75 mm square) that has been immersed in a container containing 60 mL of one of the chemical listed in this test method. Each chemical is applied to a separate panel. The amount of chemical on the cloth is controlled by beginning the wi
26、pe only after the cloth has stopped dripping. One back and forth wipe shall be performed in the horizontal directions, for the bottom, middle and finally the upper surface. Store the panel for 48 h in an environmental chamber at 23 +/- 4 C and RH of 30 +/- 10%. Clean the panel with a soft clean clot
27、h. Inspect the panel without magnification. Test Acceptance Criteria: The panel surface shall not exhibit any surface deterioration, coating delamination, fracture or color pick up. 3.7.9 Weathering Resistance Panels prepared in accordance with para 3.5 shall be exposed as follows: . Florida Exposur
28、e (Miami area) 24 months at 45 facing south . Accelerated Weathering: One of the following methods: EMMA Weathering in Arizona 625 MJ (SAE J1961) Xenon Arc Weather-o-meter, min 750 h (SAE J1960) Carbon Arc Weather-o-meter, min 750 h (FLTM BO 101-01) ENGINEERING MATERIAL SPECIFICATION ESB-M80J4-A Cop
29、yright 2012, Ford Global Technologies, LLC Page 6 of 6 Test Acceptance Criteria: The panel surface when viewed without magnification shall not exhibit coating delamination, cracking, checking or blistering. In addition, the color expressed as units of the Yellowness Index (YI) specified in ASTM D 19
30、25 (see para 3.7.1), shall not exceed a value of + 8.00 at the end of the exposure period. Note: Florida exposure results shall take precedence over weatherometer results. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 FLASH POINT, min 92 C (ASTM D 92)
