Document 44y225jep6dyOq4EpRO1gwJyG

E. I. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK. NEW JERSEY Serial No. KN-49-H Copy No. 1 NEWARK PLANT * PIGMENT COLOR RESEARCH REPORT LABORATORT HBVELOFWENT OF K-2413 $-Nitro-2~Amino-AnBole * "Naphthanil" ASD Period Covered! June 1946 to June 1947. \ MJM79 FILE: DATE: I/3/5O N42195 conr to* & * Suawrlcal f&o - Reaoaroh QffcLco (22L * Library Filo (221, * V. Chalup8ki * Plant : * H, p* Spangaaan * D. B, Kiman - Extm SorlaX fio KH49*0JL Cojy Bo* i HMABK PLAHT px g k s n t c o l c b r es ear c h m?m f in a l h mss Tms$ iabc r as c ibc k ev el o j pmek t or iww >Hlti^2MAidno^laola * ^tephthanil" 480 PERIOD CCM Juno 1946 to Juno 1947 CHttKSt A-IC-40 SUBHITPBO STt A. 0. MEJS APPROVED B3T $ d at s sommo* 1/27/49 DATS ISSUED* 1/3/50 DUP050067173 i&MA RMSW) (A)Jk -2292, 5^tro-2-amino-anlsole ** H-ASd J , was returned to tho laboratory for further study In on attempt to eliminate reactivity in alkyd. nin4rff the course of the study, nany nmHg arf devalooaent varl&bliui were tried on the 8$55M> (A) formula. severe! of these led to a process which realised a ravines of *mtw<nafailv 20 "owtnnor on oostw. aieniMh thnMMimj^ne *s^b^. wa^yae w^WBoo^e^see^wnminy Bound^w^eie e*esee Sf Wgev^a ^efa^^onwene e^e^B 'OnaagjpSB v^vn^BBs^Be^Bse vewBervene^e `eejoB s^aewsss|seevF WBsevw product was lighter than RT-551-Dand shewed no advantage in reactivity, this mmmsr formula see coded K2413# U10 cost iowMir xomUj fUpQlw Ul MpmiiRWIim^m. m. 4m mAm/JkimMk E) (A) 7 in the Following -wi 1. Reduction in HC1 of 0*9 ad. 2. SHalnation of sodlun bicarbonate. 3. Cutting of the sodium hydroxide 0,5 mol* 4* Reducing the coupling volume to 1/4 of the K-2292 formula* Severe! variables vers run on ths K*2413 process including temperature of coupling and development, and simultaneous and reverae coupling procedures hut none gave any advantage, this process mas filed for possible future reference since there was tnrdshMttats^iatebett ih.it. K42a5 Reducing the hydrochloric add in the diaso necessitated a corresponding cut in the alkali in the coupling, All the sodium bicarbonate was eliminated in addition to a cut In caustic soda* However, without the buffering action of the bicarbonate, the pH of coupling rose to 11*0* Further deoreasss were nade in the alkali to bring the pH to normal. The lad of buffer caused the coupaLing pH to be very sensitive and small cEuantitiea of caustic soda g&ve wide variations. Concentrating ths slurry to 1/4 ths volume increased ths depth of product eli#itly but this effect wae desirable in K-2413. Increases in the temperature of coupling increased the depth of the pigment also, with boiling giving the aaadwun depth. The reactivity is increased slightly too. intw variable for Increasing ths death is the tnauitMi of coupling* One at 35#c actually showeda little superiority over 30*0. Two attempts were aade at the reverse coupling technique but nothing of practical value was obtained. The developed samples were no better than whereas the undeveloped ones were superior in reactivity but very light in color. The simultaneous coupling of the diaso and base into a water bath gave m*oduotft light** then standard ^n4 aoro Intomw but with no pi&otlvitar iuto&fit&ow. K*2413 was evaluated with RTW57UO andgsves results equal to er unfitly inferior to blonds made with K-2292. All the aaperlnental samples prepared van tfc&tod in Munfio aw wall as DUP050067174 --................ --------------------------------------------------------------------------------------------------- Ju JJQI^ <n dlfiBO* Vfirl&tioQs im eott{41sg wlwwii M#rijwrt*4 ifijl diaao eutB in olkBli ftafthur outs Is caustic soda i^ltiooBl cottpUog voluu gtuijjr Stu^- of tOBpSTStUfO of Study Qf tOUgMSOtUlFO of coupling Preparation of largs sample of 1197-37D Repeat of 119?42 Study pH of dtevelopaent of S,H, K-2W3 Attffiaata a mnnu owt djaiitMUMimi juimliima Adding of RT*573U*y to S.W. lot 8999 Fw OuSSrthOF itudsr on esses S* of''WO dAfilof&ifBiste Rovers type coupling KN-49-12 S*ai-Worka Devalopraant of K-2413 pflp/jtL^g h n n KH-49-6 Reactivity of RT-55W> DUP050067175