Document EdE4aNadbJaeaXBNxo4Q6vK8L

E. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK. NEW JERSEY Copy No. ^ Numerical File Period Covered: NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Final Report ECONOMY STUDIES OF TGLPXDINB IMROORS (aETANITROPARATOLUIDXi "NAPHTHANIL** BS) RT-530-D, RT436-D? RT-135-P APRIL 20, 1946 to SEPTEMBER 30, 1946. FILE: DATE: 221t>32 3/11/49 NJSB N42202 Copy to* #1 - Homerleal File 2 - Research Offlea (221.32) 3 - library File (221.32) 4 * #10 Building File 5 - # 6 Building File 6 - Dr. D. B. Killian, Hewark 7 - Extra 8 ** 9* Serial So. KH-49-18 Copy Ho. 1 HBWARK PUm PIGMEHT COLOR RESEARCH REPORT Final Report ECOHOMX STUDIES OF XOLUIDlHE HAR008S (META-HITRO-PARA-TOLUIDIHB -9 "HAPHTHANIL" BS) RT-530-D, RT-436-D, RT-135-P April 20, 1946 to September 30,1946 SUBMITTED BX* A. D. APPROVED BX* A. A. feiaiolara DATE SUBMITTED* 3/9/49 DATE ISSUED* 3/11/49 DUP050067222 mmm..sTOxooo^im..moo^ RT-530-D, RT-436-D, RT-135-P < A process 0000007 study of the toluidioo maroon (meta-nitropara-toluidine --* "Haphthanil" BS) ana undertaken in the laboratory* RT-530-D, BT-436-D and BT-135-P (the pulp of RT-436-D) were studied in two ways; (1) ingredient cost economy and (2) making coat reductions lay increased batch size* The following new processes were written for the three formulas and were submitted to the plant on a trial basis. K-2399 (BT-530-D) K-2400 (RT-436-D) K-2401 (RT-135-P) In all cases the new procedures give identical results with the present standards with respect to masstone and extension in lacquer, overstrlpe bleed,and,in the ease of HT-530-D, dispersion equal to standard by a special test* K-2399 differs from K-2286 in the following ways; 1. 50% reduction in dlazo volume* 2. 20# reduction in ooupling volume. 3* 50# Increase in batch size. 4. 26# reduction in hydrochloric acid In tha dlazo with a corresponding cut in sodium carbonate* K-2400 and K-2401 differ from K-1187 and K-1583 respectively in the following ways. 1* 50# reduction in dlazo volume, 2* 45# reduction in development volume* 3* 37# increase in batch size, 4. 5# cut in excess H-B8 5. 26# reduction in hydrochloric acid in dlazo with corresponding out in alkali* The goal yield on K-2399 is 96^1 as i*9 964i anhydrous/!1 for a 2*0 mol coupling* K-2400 and K-2401 have goal yield of 1004*5? *as is*, 997? anhydrous for 2.22 mol couplings* " Prom a cost standpoint, based on the forecast for 1948 on July 29. 1947* a total ingredients cost saving for all three codes amounted to approximately $12,500. If we estimate another 5 cents a pound on making costs due to increased batch size, this would add another $20,000. DUP050067223 -2-- DISCUSSIOHt A limited variable study was made as it was desired that no properties be affected which might require durability data* In all three formulas the volume of the dlazo wgs out 50% and the hydrochloric acid reduced 0.8 mol to correspond to the RT-386-D dlazo formula* Ho further variable study was made on the volume or the acid. A corresponding cut in soda ash in RT-530-D and caustic soda in RT-436-D and RT-135-P was made to compensate for the aeid reduction* On RT-530-B a 20$ coupling volume out was possible but a 45$ out caused the product to be dark and dull* Ho change was made in RT-436-D and RT-135-P volumes. On RT-436-D and Rf-135-P, the Haphthanil BS was adjusted to equal the amount in RT-530-0 which represented a 5% reduction. It was shown that whan 10$ of the ``Haphthanil" BS was substituted by beta-oxy-naphtholc acid and the RT-530-D solution method used, a product was obtained equal to RT-436-D in color, bleed and durability. It was felt that It was too groat a change and might altar the properties, although further savings would have been realized* The dilution period prior to the development in RT-436-D was eliminated and reduced the volume by 45$. Ho intermediary stop was tried* During all of the work on RT-436-D and RT-135-P no Pig ment Green B was used* Ihe products obtained were almost equal to the standard and this agent might possibly be eliminated. n .b . 1192 $2* JBgg2lR|i2fiL jagg. 11, 12 Volume studies* dlazo and coupling 15 17*19 deduction in Hydrochloric Acid 21 Conslatency Series RT-4^6-D 10 11.18.20 16.18.20 22 Volume of Dlazo Volume of Development Reduction in Hydrochloric Acid Reduction in excess H-BS Consistency Series Ilaalju- 14 23 Reactivity of RT-436-D and RT-530-D in 08-2527 Weatherometer Panels of 1162-130 <Sfc D REFERENCE* N.B. 1162-10 to 23 incl* 45, 49 a, 66, ft s DUP050067224