Document JvaxVOOy8y7GnJ0Bp7Yyez2Xa

E. |. DU PONT DE NEMOURS & COMPANY PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK, NEW JERSEY Serial No. KN-46-33 Copy No. 1 ^ 4 4 ,'S3 NEWARK PLANT PIGMENT COLOR RESEARCH REPORT ECONOMY FORMULA, FOR RT-^tl-D, K-226 (Mn ionei- of Tobias Acid -* BON) Period Covered: October 24, 1945 to April 29, 1946 FILE: DATE: 6/26/46 NJ3S9ft N41551 Beriei Bo Oflfjr So 1 Copy tos $1 Bwaorieal Tila 2 R**rek 0tilm (222c22} 3 I&fcrery FA1# (222&2Z} 4 a, Imperial so Choreal IasAttstrieo* * Ltd. a \ co m 7 - W# Fo Sptagowm* Imrk 6 Bstm HBSABS: PL&fT P2GSSSSS COOK R1ESAHG1 REPORT Floal Report; ttttM BCOHOKJC EWSm FOR ~22?6 Clla tea? fafef&s J.oM^i01)0 Period Cererod* etefes** 24* 2f4 to April 2f, lf46 BCBKXmD lit A B* Ri^lg jk~^s~y$ APPROVED BT $ A A,' 1risssl&sC M VS)t Jtm* 24* If44 mm imms b ^ * N41551.01 DUP050150483 mmmm As & mean f effecting eooaoalea in the aeimfactur of SSaroon Tonor RT~521B* it b& propooed to sodify the procedure o a to utilise the alkalinity of th Manganese fcy&rat to preset the coupling reaction* Sine the saangaaace gelt of th dy mold probably b formed slra0.t.nouXyt th dilution and' acidification la th present formula, K~2128 could he 3iMsmted with r suiting savings from oseissica ef th acsti# add* It ms also espeoted that use of a lower development veins night he geeeifcl with roeulting inercas in batch ada and consequent savings* mm &. fomnia S~22?6 mbcSytej the proposed change# ms written on the basis f a 2*0 mol pleat charge no oea^mrod to 0?5 sol for Rr*521$0 By aUsyi era*! grind, the product obtained in the laboratory ms logs intone and sem= Vifcttt blwsr and maker than th current tenders* Bowowj, it la anticipated that these differeno* will ha Isasensd in Irrgsr r.salo trials, since sets* defioieney in thee properties ms ejqperleneid oa staiukrd foraala during the work m this problem Utilisation of th formula oa a p'tjvt r;n2. is predicated cn th availability of a larger TOB dl*c` vat* sort purposes, it ha been assumed that on of the present tile lined vats effort ho od satisfactory, S32^JOM2S The modified proeoduro oeaeist of ndming the ii&iso into the BOB solution (th latter containing only a slight s eo s s s of ocustie soda evor that needed to dissolve th BOB) and effecting coupling by addition of th smspaaes hydroxide lurry* fh imfsnes oalt is tfcsn developed without further dilution by heating to the boil and additional jsaag&EQs is precipitated with soda, ash Sine th pE of the diaas ton iJLAvr.x> rori-Ano Xm until rcnrly all th i hydrate has bom added, oiBalteaecua ecnplLic *C formtien of the rpagnsM toner probably take place* Coupling i net complete hcrarevor until after 1*1 l/2 hour* stirring at pH 8*3 * 8*5* She addition of sola ash after development ms for th purpose of Increasing yield t equal that of the standard formula* The following variations of the smm lav also hem studied,) $ho use of Broenner* old hue the *o`e effot as in the standard Rf"$2X^ formula* She amount tised la u*2;3& ~%e reduced to obtain & lighter and stronger profiuot* Since the volua sf the die so would prevent making th proposed sbarg in th available SOB diase vat, on attempt my made to us 1eaw mimes at a. concentration sufficient to permit ns of the present equipaent* din sox becas brewa in color and product mar lightly duller and weaker. DUP050150484 mam or coumaa UtttiM of di&s to the KM oeeias to bo profarable to the opposite procedure* Tinctorial differences xrere slight but ia the latter oeco9* coupling ms itifari&bly semplet,, AmUHICT OF CQtMlM Slight inoreaoe ia alkalinity (abcrro p8 84) bay not boon tried but addition of all the alkali at tele point resulted in wak presumably bard products hUMS.rn.re or mm*smim- Use of ood nob after doTolopawat instead of eaustie soda resulted ia lighter, ea@e?hat sore intense preduets* Softer stronger product rre obtained by addition of tidi pointo mmjBSLSSBk Us of turkey Bod Oil iaproves strength- and adds to the yl'sldo Sins the mixture of diase sad BOH is- stronger acid, it is not advisable to add Turhay Red Oil until the ssang&neeo hydrate tea been run ia SSfikJSM do&l field for K-22?6 is 1350# a is (containing 45^ aolsture), (bivalent to X29C# anhydrous color This is cosap&r&ble to 496# containing 56fi moisture or 468# anhydrous fey RT*52l"B S-2123* a^PSRIMEMTAL mSAlW See H,8o 114? end 1180 ' 3147-16, IS 1188-6, ?, 11, 13-20, 22-31, 33* 35* 36, 3* DUP050150485