Document pp2mbj6rRyj7a75MyyjR38QVa

E. I. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 YANDERPOOL STREET NEWARK, NEW JERSEY Serial Ho. Copy No. KB-44-40 / fr CCpy \ NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Final Haport * I-467-D, FIMAL PLANT DSVaO5UMT. Period Covered: JANUAHX 1943 - OCTOBER 1943. FILE: DATE: 212 6-7-44 N37968 Serial So. KS-44-40 Sopy So. / Copy tot #1 - numerical 9iX* 2 - Research Office 302) | - Ubrary Silo ftU) I - |10 Building File \ I - Xaperlal Chemical Industrie*, ltd. 9m. M I . II HM it 9 Sr. C. S. Suppreeht, Wilmington OCX File) HESARK Ptem PIQMMt GQLm RESEARCH 8mm Final Report 5 Titles X-467-B, FIHAJ. P1AHW DBVBXOPMEHX. V Period Covered* JAHOARX 1943 - OCTOBER 1943. SUBMITTED SXt J. R. BOMS APPROVED BXl "f* CHALBPSEI s~/f*/y DATE SUBMITTED* 5-19*44 DATS ISSUED* 6.7.44 DUP050149943 The final plant development work cm the -467-0 type of sine yellow constated of the following aisee&aneost mattegtt* 1* Decreased amount of treating agant (Wacollne) to meet the "combined water* specification of tho Bureau ef Aeronautics, 2* Decreased daSBltl, % 3. Production as a wet*tits if X-54X-&, oral 4. Manufacture on the -$44-0 formula tho loot thrae problems being undertaken for increased economy. 3!i previous work on this type of sine follow was reported la XX-43-1&* 1 The Bureau of Aeronautics specifications for sine follow stipulated that tho pigment should oontain a maximum of 8 percent "combined water*. the treating agent in -467-0 actually decomposed in tho determination of eeaiblnod water, thereby throwing this waive above the specification limit, the treating agent (Wecoline) was decreased from its original valve of 3 percent to 1.7 percent in the replacement female K-1850 and this change permitted certification .of -467-0. 2 The lower amount of treating agent not only enabled $.467*3 to seet specifications hut also reduced its cost slightly. A further step in this direction was attenpted h$ a chromate reduc tion in tho formula. About thirty hatches were struck with on approximate $ percent decrease in the aneunt of chrome liquor. Shis change in formulation still allowed the sine yellow to meet the sul fate and chromate specifications of a maximum of 3 percent BO% and a minimum of 41 percent CO*. A mix cf several plant batches of low-chrome materiel was actually made for a new standard, but this was not adopted because of declining Interest in this type of sine yellow. 3. ismTMJsrnm Tbs -$41-D formula was originally set up as a lew-ehrems modification of T-232-B. This formula was never actually employed for the production of -232-3 since material made by it contained excessive amounts of sulfate. An attempt was made te atrike -467-3 on the -541-0 formula with a slight inoreass in chrome to reduce the sulfate content to below 3 percent SO3 . This formulation was DUP050149944 S t$13i f 8 wae attempted because It gave potentially greater savings than toe regular 8-407-B formula with 4mt m><I chrome. Of tbs five batches struck on tbs formula, however, two contained too much sulfate and m farther work was undertaken. She I-544-D type of sine yellow la made from sine oxide than also sulfate like Y-467-D. ee sulfuria acrid is used la its It contains manufacture. atabjtm,outb3atcpheersceonft re made and treated like XY-4677--D0, soante beetinog vat uasbed and er centrifuged. This material was satisfactory toon tested AI-TS~P-656 prim* formulation. Severer, so further verb formula, which offered a substantial east reduction, or any -4e7-0 development vas undertaken because of toe trend toward ho tow-sulfate type of sine yellow (T-539-D) for all purposes. See P&B-44-6. DUP05Cii 49945