Document kBpvJDnY5oGkBERY2oe8pROO

% PLAINTIFF'S EXHIBIT MEMORANDUM To From Date | Subject I Distribution BBH 2/17/7% ACCELERATED WEATHERING OF COATINGASPHALTS Accelerated weather testing of unfilled and filled asphalts representing the coatings being used by the various mills during mid-1977 has been completed. The tests were run on 30 to 33 mil coatings applied to aluminum panels. The weathering took place in a Model DMCR Weather-Ometer according to ASTM D529-62, Cycle A. Unfilled Coatings Mill ) FK Sample 4/9 Cycles to Failure 58 FK 4/25 54 FB 4/11 50 FS 3/4 48 FJ March 42 FB 3/11 38 FM 5/4 38 FO 4/8 38 FO 5/2 38 FC 4/20 37 FC 5/25 25 I i FW 3/29 21 FW 3/31 21 53% Filled Coatings Mill Sample Cycles to Failure FK 4/9 105 FK 4/25 96 FB 4/11 75 FJ March 75 FS 3/4 65 FB 3/11 56 FM 5/4 48 FO 4/8 47 F0 5/2 46 FC 5/25 35 FC 4/20 30 FW 3/29 27 FW 3/31 21 BIRD 010972 ACCELERATED WEATHERING OF COATING ASPHALTS 2/17/78 - 2- Summary - 1. As is usually.the case, FK coating asphalt, both unfilled and filled, had the best durability. 2. FB coatings of two different dates were quite diverse in their resistance to accelerated weathering. The less durable of the two showed a relatively poor performance compared with most FB coatings. The fact that the filled version of this coating was also relatively poor corroborates the reliability of the results. 3. The coatings from FS and FJ can be considered equivalent in weather resistance. 4. Results from the FM and FO coatings were the same. This is to be expected since the asphalts are from the same source. 5. The FC asphalt coatings did not show good average durability. This was especially true of the FC filled coatings which endured for only about one-half the number of cycles expected from a satisfactory coating- 6. The unsatisfactory weathering experienced with the FW coatings has already been commented on in a report under Reference (2). 7. Stain test results indicate that the most resistant coatings were from FK, FB and FS. The least stain resistant was the coating from FC. NOTE: The unfilled coatings in this series were sampled at their respective plants when shingles were being produced which were also sampled and sent to Shreveport for exposure on the test decks. This is an attempt to correlate the durability of shingles with the weatherability of the particular asphalt coating used in their construction. References (1) BBH Book 246, pp. 25-27 (2) Project 007, No. 3, dated 10/24/77 BIRD 010973 ACCELERATED WEATHERING OF COATING ASPHALTS 2/17/78 - 3- ASPHALT COATING DURABILITY - CYCLES TO FAILURE IN AWT Texas Stain Norwood 3/11 Exxon/Shell Venezuela Average Filler 3.5 Norwood 4/11 Exxon/Shell Venezuela Average Filler 4.5 Chicago 4/20 Amoco Average Filler 4.5 ''/l 4.0 Chicago 5/25 Amoco Average Filler Martinez 5/4 Shell Oman Average Filler 4.0 Perth Amboy - March Trumbull Venezuelan Average Filler 3.3 Shreveport 3/4 E. Texas, Arkansas Average Filler 4.0 Wilmington 3/29 Edgerton Californian Average Filler 3.8 V\ ) Wilmington 3/31 Edgerton Californian Average Filler S.P. F 238 Pen. 0.1 mm 18 Unfilled Sample Cycles 963-1 -2 38 38 38 Filled Sample Cycl 964 56 FBW Dust 231 ' 20 965-1 -2 48 966 75 51 50 FBW Dust 234 17 967-1 37 968 30 -2 37 37 Limestone 233.5 18 969-1 -2 23 970 35 27 25 Limestone 221 20 971-1 38 972 48 -2 38 38 Limestone 228.5 21 973-1 -2 42 974 75 42 42 B65 Filler 220 14.5 975-1 48 976 65 -2 48 48 Glenwood Filler ' 224 16.5 977-1 -2 21 978 27 21 21 3M Filler 226 16.5 979-1 21 980 -2 21 21 21 3M Filler BIRD 010974 ACCELERATED WEATHERING OF COATING ASPHALTS 2/17/78 - 4- V ) ASPHALT COATING DURABILITY - CYCLES TO FAILURE IN AWT Texas Stain 3.5 Portland 4/8 Shell Oman Average Filler Portland 5/2 Shell Oman Average Filler Charleston 4/9 Exxon Venezuelan Average Filler 3.5 ) Charleston 4/25 Exxon Venezuelan Average Filler S.P. F 217 222 231 232 Pen. Unfilled Filled 0.1 mm Sample Cycles Sample Cycles 20 981-1 . 38 982 47 -2 38 38 Limestone 17 983-1 38 984 46 -2 38 38 Limestone 16.5 985-1 -2 60 986 105 56 58 Monroe & Augusta 17 987-1 56 988 96 -2 52 54 Monroe & Augusta Distribution: BB - Mr. Hixon BBR - Mr. Wood BE - Dr. Schnizer BBQ - Mr. Homan MB - Mr. Clay MK - Mr. Marsh MS - Mr. Colvin MJ - Mr. Miller MP - Mr. Suva PB - Mr. Reber PK - Mr. Davis PS - Mr. Burris PJ - Mr. Dickinson PBL - Mr. Clark ) PKL - Mr. Price PSL - Mr. Kirklin PJL - Mr. Peacock FP - Mr. McClung FM - Mr. Fitzpatrick FO - Mr. McAnulty EW - Mr. Keyser FP - Mr. Koopmann FM - Mr. Costa FC - Mr. Farnik FC - Mr. Anderson FF - Mr. Berns FF - Mr. Morris FC - Mr. Peterson BIRD 010975