Document OJEnj01oEex0vOB75DvOGryp1

E. I. DU PONT DE NEMOURS 6> COMPANY PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK, NEW JERSEY Serial No, ff Copy No, I --/ ^ t 4 NEWARK PLANT <x X CHEMICAL DIVISION . COLORS \ 'ri FINAL REPORT ) TITLES TOLUIDINE YELLOW YP-440-D (meta nitro para toluidine^acetoacetanilide & rosin) Period Covered DECEMBER 1950 - MARCH 1951 FILE: DATE; 221.4 9/24/52 } j. i \ "5k r( H NJ S747 Copy to: #1 - Numerical File 2 - Research Office (221.4) 3 Library File (221.4) 4 - H. Araoul - Plant Files I - j! n ! Tullf/A^Siegel 7 - Extra Serial Ho. KN-52-17 Copy Ho# -3T NEWARK PLANT PIGMENT COLOR RESEARCH IMPORT FINAL REPORT Title: TOLOIDINE YELLOW YP-440-D (meta nitro para toluidine-*acetoacetanllide & rosin). Period Covered: December 1950 to March 1951. Charge: A-IC-46 DATE SUBMITTED: 7/30/52 DATE ISSUED: DUP050069108 A brief Study wee undertaken in the laboratory to determine the effect of the YP-649-D type laking procedure when applied to CTP-440-D. In the YP-440-D process, aodium roainate was added to the sodium acetate buffered aceto acetanilide suspension prior to coupling. During the coupling, acid wad liberated, precipitating free rosin. Therefore, there mas no rosin in Solution to be precipitated as barium roainate when the coupled slurry use treated with barium. The free roein was believed to contribute to poor texture. The development of rosinated bensidine yellows, YL-647-D and YP-649-D, led to a different laking technique wherein the coupled slurry was neutralised before the sodium roainate was aided to the vat. By operating in this way, and subsequent treatment with a heavy metal salt, the roein was precipitated as a metallic roslnats The application of this laking procedure to YP-440-D was anticipated to yield products having better texture and possibly other advantagous properties such as reduced fire hasard. As the work progressed, consideration was given to the develop* meat of a low cost rosinatsd toluidlne yellow having IT-445-D (MNPT^AAA) properties CONCLUSION The light, green, intense masstome and better texture of the product obtained by application of the YP-649-D laking technique it off* set by greater opacity and slightly lower strength. The product is inter* mediate between YP-440-P and YT-445-D in most properties and probably would be of no interest to customers who buy TP-440-B for its transparency. Efforts to duplicate the tinctorial properties of the toner, YT-445-D with a 70% lake have been unsuccessful because of unattractive red, dark, dull, transparent masetone. It is possible that a surfactant may be found to influence the masetone, however, the search would be costly* DISCUSSION The application of the YP-649-D type laking procedure to the CYP-440-D process resulted in greener, lighter, more intense masstones, and more opaque undertones. The modified product contained 20% barium roainate and 10% free rosin, compared with 30% free rosin in CYP-440-D. The ink properties demonstrated a very slight improvement in body, length, and flow with some improvement in texture I7-1/2 vs 6-1/2 at 5 pisses) compered with the laboratory control. Coupling in the presence of varied amounts of Blanool or Aerosol OT had relatively little effect on strength or opacity but increased amounts of Biased caused a progressive reddening and darkening of the masetone. Variation in amount of roein demonstrated the 30% level to produce the optimum toner strength. For further details see tabulation. i DUP050069109 EXPBRIMBHTAL DETAILS Safer to Hotebook 1317 Ixerpts 7,6,9,10. i DUP050069110 . S oh If gg 3a t fti f< *> 58 *O0 rl 4M0 OHHO 4H MWOHOrl HO'OH 4> nloj* c* _ VtH 8 CM O'* t^-rt t*\ (MSB rHtr-Ht H SB S3 4^ <S rl S4 Jd .JB iff Or n tltltU HHHrl asm DUP050069111