Document 7M1p3zby6mKYBmkZxjw59bB36

0. P. Pague May 21, 1971* ' Thermlnol 60/66 Compatibility H, E. Hatton C. Paton T3P D. R. MILLER Dave, we have recently been urging our salesmen to encourage top-up of Thermlnol 66 systems operating at less than 600P with Thermlnol 60 Instead of Thermlnol 06 due to shortages. This also presents an excellent opportunity to get the pro duct In and operating In many systems. We are obviously also urging Thermlnol 60 Instead of 66 In all new systems that operate below 600*P. I have had some salesmen express apprehension about the com patibility of these two products. Thus* I am requesting that you do some testing on Thermlnol 60/66 compatibility such as checking physical properties at various mixtures. I would suggest 90/10, 80/20, 70/30, 6o/4o, 50/60, K0/60, 30/Y0, 20/80, and 90/10. Properties to test at these various concentrations would be specific gravity and viscosity as well as any visible differences you might observe. I have attached a tar any questions. 28. Please let me know If you have Regards, cs Att. 0. P. Pague 0013149