Document X7QQ4zekznr91Oo3nJ6o9rYkd

E. I. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK. NEW JERSEY Copy No. 1 NEWARK PLANT PIGMENT COLOR RESEARCH REPORT RT-5Q0-D, SEMI-WORKS AND PLANT DEVELOPMENT AND STANDARDIZATION ^ Period Covered: February 1945 - July 1946 FILE: DATE; 12/31/46 NJ637e Copy tot #1 - Numerical File 2 * Research Office (221.21) 3 * Library Vile (221.21) .4 - #10 Building File 5 - V. Chalupski, Plant Files 6 Imperial Chemical Industries. Ltd. nm n N h g* e n 9 W. F. Spengctman* Newark Serial Me. KH-46-85 Copy Bo. 1 NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Final Report Titles R.T50O-D# Semi-Works and Plant Development and Standard! zatiosa Period Covered* February 1945 * July 1946 SUBMim BY8 S. J. Heee . APPROVED BY s J. 0. Morrises DATE SOBlCimDa 12/18/46 DATE IBBOBD* 12/31/46 DUP050150705 Seai-orkc development work on RT-500-D, an automotive red, was suspended in May, 1941, as a result of wartime conditions (see KR-42-265)* bevelopasbnt and production was resumed in February, 1945* upon the request of the Seles Department, to supply material for evaluation work and to fill sample orders* Semi-works production on the laboratory K-10&C formula averaged close to the Rf-500-D Bead Works standard, let 3791, in both lacquer and alkyd enamels although there was some tendency to go very slightly dark la maestoso* Similarly, in the plant, an approximate 1*3 sol K-1000 type formula gave a elcae match to standard in laiquer and alkyd and there seemed to be no necessity For running a large seals variable study to obtain satisfactory quality control. A bland of three plant batches, lot 479X8, which was a very eloee cheek to the Seal-Works standard in lacquer and alkyd, was set up as the plant RT-500-D standard, SD #4646l..aad a new plant type standard formula, K-2379, was written* Supervision of RT-50O-D manufacture was turned over te the plant in July, 1946. . Semi-Works production on the K-1000 formula was stated in February, If45 and continued intermittently through August, 1945, in order to fill saaple orders* All five batches made were very slightly dark in taassione in lacquer and alkyd versus the standard,, let 3791* Rubout masstones were dark, with strength and tint being close to the standard* As let 3791 vac is extremely short supply a mix of the first two Semi- Worke batches made in this series was set up as a sampling standard, BD #48366. this material, given lot number 8030, was never officially set up as the RT-5C0-D standard* It was, however, a close cheek to lot 3791* Plant production was started in March, 1946* The first three batches finished up close to let 3791 and a plant standard, lot 47958, was set tq> from a blend ef tbie.material* A formula based on the plant procedure ueed was coded RT-50O-B, K-2371* A slight error in the calculation of the buffer salt (sodium acetate) wae corrected in a subsequent formula, K-2379* The very consistent quality results being obtained made it possible to turn over supervision of manufacture to the Operating department without further development work* DU P050150706 -2IXFIBBSEHTAL DETAILSs M*d6*52 RT-500-D* A coupling of Para ohlo ortho adLtranilia and "HapfethafflU^ ASB* "Ifaphthaail* ASB* The ortho toluidide of Beta hydroxy aaphthoie acid* DUP050150707