Document BRLpBrKdGepVwppdbdzoO7Emj

E. I. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 YANDERPOOL STREET NEWARK. NEW JERSEY Copy No. 1 /f/V*'4 f - 3 NEWARK PLANT PIGMENT COLOR RESEARCH REPORT ROSINATED HANSA YELLOW G LAKE, YP-440-D SEMI-WORKS AND PLANT PRODUCTION Period Covered: October, 1943 - May, 1948 FILE: DATE: 4/6/49 N42206 ,i Copy to; #1 - Numerical File 2 - Research Office (221,4) 3 - Library File (221.4) 4 - #10 Building File 5 - V. Chalupski, Plant Files 6 - D* B, Killian, Newak Serial No. KN-49-22 Copy No. x nmm. pl an t PIGMENT COLOR RESEARCH REPORT Final Report Title; Rosinated HaneaXellow 0 Lake, KW,4QD SaaiwWorks and Plant Production Period Corered; October, 1943 - lap# 1948 Present Charge! 12*46 'ftyuyiii- DUP050067259 Uhl* report serves as a. continuation of KN-43-130 arid discusses Semi* Works aod plant production of YP-44Q-D daring the period October, 1943, throng February, 1945# whan the Production Division accepted supervision of amnufaature. Also considered is Research assistance involved in th reforaulation work doss by thft Production Division in February, 1946, Bsoaus* of the low sales volraa on this color the Semi-Works standard, lot 25671, set up In 1930, has been retained. Plant and Sesd-Worke production were continued Intermittently as sales demand required* Seal-Works manufacture was only resorted to when plant e^ulpumt was not available* The normal plant batoh else was sot at double the Seai-tforka standard, K-9590 or 270 pounds and the lithel red (fat 310) and Toluidine (fate 20? and 213) coupling vate were selected as giving satisfactory products. The majority of the plant manufacture finished up on the dark, dull m&sstons, strong, green, intense tint side of the Soad-Worka standard for TP-440-D, lot 25671, Strength on these batches was adjusted fey dry nixing with aluadna * hydrate where necessary* Shipments were uniformly on the dark masstone, green, intense tint side of standard* ` A formula based can the process in use during this period (Oetober# 1943 * January 1, 1945) was Issued in February, 1945, as the TP-440-D standard foroutl*, I&49S1 (subsequently designated the "A" process) and the Production Division .accepted supervision of manufacture. Because of the considerable fire hazard involved with YP-440-D pulverization of this color was retained in the Sssd^orks equipment. Subsequently, in 1946, the Production Division requested Research to undertake the development of an increased batch sice formula in a larger vat (Vat 206), Two dark, strong batches ware mads at 1*1/2 times the K-19KL standard batch size. Tints were redder than previous manufacture* The Production Division sot up a satisfactory grinding technique late in 1947 and Issued the TP-440-D (B) formula based on the revised process in Kay, 1940. mmm * SeajW*forks production of YP-440-D was scheduled in February, 1944, for the first time since Iky, 1942, in order to supplement plant manufacture and fill rush cyder; Two batches made using the standard K-9590 formulation ground out light in masstono, slightly strong, green and interns# In tint and mors opaque versus the standardi let 25671* A darker more transparent product was made fey a very slight increase in coupling alkalinity and fey an approximate IQS? ant in the aceto acetanilide amount* Plant production for the period reported was started in October, 1943, with tbs manufacture of one batch* The plant batoh else was set at double the K-9590 process at this time* A normal dark, strong, green, intones product was DUP050067260 3h subsequent plant manufacture (hiring 1944 1945 (12 batch#*) tha following variables Mom used for process controls 1. The aaeto acetanilld excess was eat from about 6$ to 1# in an attest to eat a nroduct 1 or to standard in strength **uA tint. Aif.hfmeh m decrease in strength and increase in redness of tint was obtained subsequent manufacture sag based on the lowered second component excess for reasons of 2. Difficulty with adjusting the volume of the aeeto-aoetanilid before coupling . to excessive foaming was corrected by adjusting the volume prior to ,. addition of the sodium roslnate solution* There was no color effect noted *.;' as S result of th.is chants. I* Changing from coupling Vat 310 to Vat 20? apparently gave a somewhat darker , end reddir product. Vat 310 is normally not available for Sanaa yellow manufacture ns it is the coupling vat for the special Lithol red and Bordeaux maroon unit. ; . Four of th above batches were close to standard in strength and were Shipped straight, The remainder were adjusted with alumina hydrate and were Shipped on the dark, green side of standard, A new YP-44Q-D standard formula based on the plant process was issued in February, 1945. This formula, K19B1 (Bubeec$antly desisted the *>A process) differed from the SeraWforks procedure, K-9590, as follows} 1, The batch size was doubled, 2, The aceto acetanilid excess wae out from about 6,6$ to 1$. 3, A change in technique involving adjusting the volume of the apeto aeetanilid solution before instead of after adding the sodium roslnate solufcimwae used. The final solution volume before coupling is not changed. BOTEt (binding of YP-440-D was retained In th Sead-Worka because of the special eetwup needed to decrease the considerable fire hasard on this color. The Production Division accepted supervision of manufacture of X0440B on the above basis in February, 1945, In January, 1946, the Beseareh Division was requested to dsviflsp an Increased batch sise formula for TP-WWD. Two batches made in Vat 206 at a 50$ batch size increase over K-1981 ground out dark, 10$ strong and slightly internes in tint versus standard. These products were noticeably redder in tint than previous manufacture in Vsta 207, 213 and 310. These variations in a&sstone and tint associated with the use of different coupling vats are pbbbably the result of the type of mixing being obtained during the diaso addition, Biaso excesses (even when local and temporary) are known to give darker, redder, and duller product#, ^T^TsimTiai - There is no patent restriction in the manufacture of yp-440-D, It is not believed that this study has reSitaltad in any patentable developments. DUP050067261 3F440*3)i A roainatad Hansa Yellow Tonor (lPY -* AAA) containing * '* " ?k*5$ toner and 25*5$ aotaJPLie * * l Heta nitre jpftm toluidine AAA l Aoato aaetanllide. mmmmm, ie t a il s d g k -49-17. DUP050067262