Document gE81BdBX4KQBDzeYV67baX8Ra

Monsanto . N. W. Touchette -^St^Louis MOM (NAME * tOCAl Organic Research date subject March 16, 3970 ... SONNEBORN/POLYSULFIDES " J. R. Darby M. W. Farrar W. F. Waychoff RtrcftCNCi Your memo to NWT, 3/5/70 TO : Cumming Paton CPATO Res. 1 Res. 1 WWAYC The questions raised following your meeting with Herb Rosenblatt of Sonneborn can be answered thusly. 1 Aroclor 1248/1254 His explanation of the reason for the weight loss at 70-85 C vs 100 C does not sound real good. Even if true, use of this for degradation of PCB sounds Impractical. 2. Santicizer 140 "He claimed that Santicizer 1A0 and lead peroxide in a C-5 catalyst formulation "smokes" spontaneously. 1 have been preaching the virtues of Santicizer 148 recently. Will I be responsible for blowing up our friendly formulators?" In working with lead peroxide and either S-148 or TCP, we did not note this behavior. However, these were small lab batches. In-plant performance could be different. Secondly, lead peroxide is an oxidizing agent for phenols. Would suggest obtain ing a sample of the "bad" lot of S-140 from Sonneborn for a check here. Next, if this is something they plan to continue to use, we should run a DTA to help to clear up the questions. Please advise. JP , 4N-IO NCV JIB* N. W. Touchette 0623556 TOWOLDMONOQ54021