Document LgYLOBkYM47bOLJzeYNmax2K5

E. i. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK. NEW JERSEY Serial No. KN-46-80 Copy No. 1 < * NEWARK PLANT PIGMENT COLOR RESEARCH REPORT RT-357-D DEVELOPMENT AND STANDARDIZATION OF ECONOMY PROCESS, K-2301. Period Covered: November 1944 - July 1946. 1 I 1 FILE: DATE: 11/27/46 si' NJ6H7B N37984 Gw toi #:1 - Numerical Fil 2 - Research Office (223.21) 3 - Library File (223.21) 4 #10 Building FIX* 5 - F. Qhalupeti - Plant File 6 * Imperial Chemical Industrie#, Ltd. I H N $ . * * 9 W. F. Speugestisa, Kewark Serial No. KR-46*8o GW * 1 NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Final Report TitleI RT-357-D HEVELOPKENT AND 6TANDARDIZATIQK OF ECONOMY PROCESS. K-2301. Period Covered! November 1944 - July 1944. SUBMITTED BY$ E. J. Haas Z.y'Ht-w APPROVED BY $ if*!U# ROIT40OS DATE SUBMITTED* Nov. 15, 1946 DATE ISSUED* 11/27/46 DU P050150071 T c The formerly prevailing small batch sis* and consequent high editing* labor seat on FTMA colors end* it necessary to investigate ways and means of levering costs* In the east of 85-351"* increase in batch sise together with light ingredient changes have effected savings in tho ardor of twenty five esnte per pound* Th laboratory economy formula, 1112-230, mo oot up on a batch also approximately throe time that of the regular pleat procedure, K-1090* Xaoreaeee in tho MBA and dye concentration and alight adjustment# in tho dyo and tho Bolybdate-tungatato ratio war# alto introdtaeod* After eatiefaetory fload-^orko trial* a mafeer of plant hatehoa rare nado to ohook tho laboratory formula. Quality performance me fairly oatiefaetory* Bated on a decision to t up a"free*flewrin# atandard, a candidate mi* of plant production, lot 8139, treated with 3# Diphenyl guanidine, was evaluated* Thi* material showed better ink consistency Characteristic* than RT-392-D (tho original *fre*-flo# atandard) but an objectionable oil bleed" resulted, lowering the SFd content to 2$ by mixing in more untreated toner gave aatiafaetory ink consistency and oil bleed* Thie mix, lot 8198, me set up ae a new RT-357-D atandard on October 30, 1945, A comparison of the new versus the old RT#i57*D vt&nd&rd follovsi lot 8198 ve let 33842* It, 0 dull - ve blue ve wk - e blue, dirty light faotneeoi equal A formula based on the above was written and eoded RT-357-D standard, K-2172. In subsequent manufacture, difficulties with weakness and bluenee* of ' tint undo it necessary to apply corrective measures (the strike temperature ms decreased from 180F. te 1704?)* A new standard formula was mitten on this basis and eoded K-2301. The plant aooepted supervision of RT-357-D manufacture on July 1, 1946* DISCIjSSIQllt The laboratory economy formula, 1112-230, differed from the standard, K-1090, as foilowe* 1* The batch else me increased te three tines that of K-1090* 2* A 66?i cut in tho MBA volume and a 5*jC out in tho dyo volume J was used to At plant equipment* 3* The dyo amount me out by St* 4* The tungstate-molybdate ratio me out from 51*2 - 1* to 16.6 - 1* A cheek te laboratory 1112-230 in the Somi-^orke finlehad up dark In masstono but otherwise does to tho laboratory product and about % strong, blue, slightly dull in tint versus the RT-357* standard, let 33842* A $f* out in dye gavs a product slightly weak versus the standard* DUP050150072 -2- Th first three plant batches were close shocks (ignoring aaeatoae which is imtsportant in FTMA colors) and averaged % stronger and very slightly yellowar and duller than the RT-357-D standard. The addition of $E KPa (ground in) in the neat three hatches gave lighter sessions products which were equal in strength hut bluer and duller than the standard and weather, bluer and duller than untreated control samples. Material of this type is stronger and yellower than RT-329-D (light, weak, blue type Rhodanine toner) and RT-392-D (P8 treated RT-329-D). The objectionable linseed oil bleed with the 3>% DPS treatment aade it necessary to shade this material with untreated toner. Subsequently, a 2^ DPO treatment was found to give desirable ink properties at the expense of only a alight deficiency in oil bleed, and lot 8198, a composite of five plant batches treated with 2Jfi BP8 was set up as the RT-357-2 stsndard on this basis* Production on the K-2301 formula subsequent to standardisation gave fairly high "OK straight" performance. Of the eighteen batches made under straight***1* S#otion 8wP*rlsln fifteen or 83JS were satisfactory to ship RT-329-D and RT-392-D have been ebseleted la favor of the new RT-357-B DSH - 46-50 QhOSBARY PTMAi Phospho* tungsto-ffiolybdio acid complex. RT-357-D A pm toner of Ifhodandne 60DB ground with & DFQ* RT-329-Dl A PTMA toner of Rhodamine 60DH (lighter, weaker and bluer than RT-35T-D). RT-392-Di RT-329-D ground with 3$ OPO. DPS 1 Diphenyl guanidine. Rhodamine; 60DNj Rhodanine 50DM plus a email amount of Auramlae. Rhodassinti 5H* Similar to Oolor Index 759. Auramine Color Index 655* DU P050150073