Document 8OBoaGbLbnrKZNBrqE1v4Eddd

E. I. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK, NEW JERSEY Copy No. 1 Numerical File NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Final Report MISCELLANEOUS LABORATORY STUDIES OR PARA REDS HB8BUARY 23, 1944 - JANUARY 309 1945 FILE: DATE: 221,1 3/12/45 N37978 Serial So. KN-45-7 Copy So. i Copy to* #1 - ffaawrieal File 2 - Research Office (221.1) 3 - library File (221.1) 4II Imperial Chemical Industries, w a Ltd. i* n | I 0, H. Dawson/B*H.Allea/Library Wtle) frc'd, 9~ M a 3'3 <* Vx* NEWARK PLAIT PIGMENT COLOB RESEARCH REPORT Final Report MISCELLANEOUS LABORATORY STUDIES OS PARA REDS. February 23, 1944 - January 30, 1945 SUBMITTED Ml i APPROVED BXs DATE SUBMITTED: 2/20/45 DATE ISSUED* 3/12/45 iiwimuiiirfiimirifi DUP050150013 2 This report covers the work carried at in the laboratory in response to two requests y namely) 1. Service to Research Request 912 * High Gloss Para Red B & Y for I.P.1., Chicago. 2* Eeonoay study of Para Red B, HE-442-D, requested by the Cost and Economy Committee. bu k . . She most promising method of modifying our Para Red B and Y (RT-442-D and RT-435-D, respectively) to increase the gloss of ink proofs thereof appeared to be that based on the introduction of an insoluble roslnate in the oolor. Accordingly, two experimental products were set up for submittal to the customer, namely? K-2020 5 High Gloss Para Red Y, and K-2021 j High Gloss Para Red B. In both cases rosinatlon resulted in significant alteration of the hue, both rosinated pigments being much yellower than their non-rosinated counterparts. However, the magnitude of tinctorial difference between the two rosinated products is fully as great as between the two parent standards. It is interesting to note that rosinatlon was not detrimental to strength, even though increased yield, and consequently lower cost, resulted therefrom. In the ease of K-2020, a product stronger than the parent standard (RT-435-D) was obtained. iGStaan..g..t.udy..,,p..f....Pqra.MAJfrdifeB The standard making formula for RT-442-D is quits complicated, and it was the purpose of this study to determine if all of the more expensive ingredients specified are essential. It was found that certain modifications, which when combined might lead to ingredient savings of more than 30 per lb., may be possible. These are summarized below? DUP050150014 T ....................... 3 . r '\ . ' Estimated R.BU Savings . new 100 lbs. 1. :0ffllt- Addition of Ice to beta-naphthol solution beforecoupling $ 0.83 . 2t-; 'vOmlf Addition of ice ' to. figment slurry -s- befo^'aiding barinw resis&iie ' a - ! 0*58 W; Decrease Mono Acid f 20J5 ... - 0.92 -emit phenyl methyl pyraaolone - $ 3.82 It Id doubtful if the savings in modification Cl) will be fully realizable is practice, since beat losses through radiation in vats are very much less than through the glass equipment of the laboratory* On the basis of several semi-works trials it is clear that the major portion of these indicated savings will be realizable in practical plant performance* Paint laboratory tests of K-2021 (c.f* supijg) revealed that this product was too low in opacity and much poorer in texture to be considered a potential low cost substitute for RT-442-D. Since the major portion of Para Had B consumption is by the paint trade, this product was ruled out as a solution to the economy problem* During the course of the work on RT-442-D, a number of accessory agents other than the Mono Acid F were investigated, gone of these appeared to be of any interest with one possible exception, namely Chronotropic Acid. In one experiment a sample of R2-442-D prepared Without the use of Mono Acid F and with only a very small amount of Chromotropic Acid as accessory agent, gave a product remarkably close tinctortally to RT-312-D, a special Para Red B prepared by re-slurrying gjad washing Rf-442-D. Obviously this lead was of special interest, because It appeared to Indicate a method of preparing Rf-312-D in a more economical manner, permitting the elimination of the very expensive two-cycle practice now used, However, all attempts to repeat this prepara tion were unsuccessful, a marked tendency toward very dark, dull masatoaes being noted even when extremely minute amounts of Chromotropic Acid were used* Zn view of the poor duplicability of the process, further attempts to prepare a more economical RT-312-D by the use of Chromotropic Acid were abandoned* DUP050150015 iSs_____________________________________ . ............ -4- St notebook So. MssiMmt %<? 537 70 - 72 986 27 - 33 1118 1-17 Page 178-191 106-141 10-85 She work on the high gloss Pares is covered in notebooks 537 and 986} that on the economy studies is in notebook 1118, JHCj SPH DUP050150016