Document rQy8BDvknVyMM9dpQLOmM30G

E. I. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK, NEW JERSEY Serial No. KN-51-31 Copy No. 1 Numerical File VT) * l "0 > Period Covered NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Final Report (Laboratory) TOLTJIDINE MAROON RI-135-P cosy REDUCTION MARCH 1949 to APRIL 1949 <0 ft IU 0747 FILE: DATE: 221.32 4/30/51 This report covers two phases of work on RT-135-P, namely* (a) preparation of samples for FAF, and (b) attempted cost redaction. Waning interest in RT-135-P caused cessation of the work* Mm m 1, Samples were made and submitted to FSFt Pariin. In these samples, ferric salts of rosin, llnoleic acid, and naphthenic acid were substituted for the calcium rosinate normally present* 2. Superficially, analogues of RT-135-P substituting BOW for part of the BBS, appear equal or superior to controls* m According to tJ. s. Patent 1,962,132, certain metal salts of organic acids protect nitrocellulose films from deterioration by ultra violet light. Samples of RT-135-P containing such salts were sought for transmittal to F&F, Par!in for test. Laboratory batches were made, incorporating ferric rosinate, ferric llnoleate, and ferric naphthsnate, in RT-135-P, instead of the normal calcium rosinate. The samples were turned over to Sales Service for transfer to Pariin. Bo reports have been received by the Chemical Division. A cost reduction was hoped for from the substitution of BOB for part of the BBS in RT-135-P. The basis for the prospect is the known fact that part of the BBS used in RT-135-P is degraded by hydrolysis to BOB. Therefore, direct use of BOB, with careful non degrading dissolving of BBS, should accomplish cost reduction. Two laboratory Series were made using such details, as well as reducing the second component excess. The products appear at least as good as the controls. nmMsm* N.B. 1302 - 11| 14| 15} 21. O.S. Patent 1,962,132 HPH DUP050068503