Document YG4nx0OejogBNm5V4N2R9wvQD

E. I. DUPONT DENEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK, NEW JERSEY Serial No. 442? Copy No. / v rr'r?` A tJV f'f.pV - '' ^ " ' ; W ' * NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Vlnal Report 1SNT&TURS EXPOSTOI SSSTES if4 !K i EVALUATION Of* PLANT AND 5EH WCRKfi BATpFFS P EVALUATION W SEVERAL IRON FROFFHATES Period Covered: January 1943 - Noveiaber 1943 i | CO NiMaa FILE; DATE: 143,54 4-2P-44 N37973 m t#* #1 - Nwnerieal Pile 2 - Reward* Office (143.54) 3 - Library m (143*54) 4 - #10 Building me 5 - Sr. R. S Oeneloe, SSMKrtt 6 Xs$>erial ebemteal Indaatries, ltd. W,, 4 * ** f - Ur. . 8. RnppreeBt, Vi2ltlttslt (161 Fils) 16 - Sr. 6. S. Fattereen, lap. Bte., Vila, u - r. 0. s. Fattereen, B*p. sts., m*. 12 - Paint Laboratory 13 - : -Ar* " (M.P.Pile) 14 - Extra Serial Ke. WM4-2T Copy Re. / I MS0SRK PLART PI6MBRT COLOR RESEARCH REPORT Pinal Report Title! HIRXATOffi PABBL EXPOSURE SERIES #44 mmjm&n or turn urn mu news bat c h es o p SVALOATIOU 6P SEVERAL IRON PHOSPHATES Period Corerad* Jeanary 1943 - Hcrreatoer 1943 SQBMITTEOSBYi 6. Brian ^ /n^7> -- APPROVED BTi P. EjBolton SATE 8tWTT*S* 4-11-44 SATE ISSUEDt 4-26*44 DUP050149980 The primary objective of exposure series #64 mi the evaluation, by miniature panel moisture condensation exposure, of semi works batches of 8-1779 and 8-1781 end several plant batches f K-1271. In KH-43-175 and XS-*3-l8o the moisture condensation performance of other semi work* end plant batches is reported. Several laboratory samples of "IBPKBEK" having low ferric iron content wore also tapes**. The parformanc* of ferrous phosphate and ferric phosphate waa eotsparod to that of "IlffSBBX by the exposure of laboratory samples of iron phosphate, a heat trsatsd *2*I*X* and a sample sf material (C# 46933) said to bo A.F.f. bat containing no amenta. The exposure date have been plotted and eemerieed in tabular for* at the end of this report. The performance of the sine yellev/Fefl0g/Jasparine/'?MFSBEX* prinere wee approximately equal to that of red lead in oil) superior to the tine yellew/regOa/Jesperine control) in one ease (Lot 96517) the per formance wee equal to the control probably duo to faulty panel preparation aa evidenced by poor duplication of identical panels. The ferric iron content, a factor in the performance f "IMFET}IX" varied in the samples tested, from 1.9^ te 10.4. The performance of the primers did not appear te he affected by variation in that range. A leten terics, #65 considered the offset of ferric iron content in more detail] no report has been made. The performance of the eeverel iron phosphate materials varied considerably. A ferrous phosphate precipitated from copperas with dlsodlum phosphate wee equal to the control| a similarly prepared ferrie phosphate precipitated from ferric sulphate had a deleterious offset on the sine yellov/fegOs/Jaeperlne primer. Too iron phosphate* returned performances equal to that of the average "JJfflWflRS* primers) one sample, C# 46933, an apparently "flopped" batch of A.F.P. manufactured bya competitor, the ether, 9&3-133. a sample of "IHFEBBr* that had been heated to 160*C. The composition of these samples was reported in 88-43-96. iwimM,* Prinere* The paints for this series were ground 48 hours In l/3 gal. ball mills with steel balls and thinned to 80 KU with mineral spirit. The ve hicle was KT-15 (08-2466 eoUde/feLO, 50/50). The red lead control east Dutch Boy Liquid Red Lead, 3pig. vol. In RL0 (978-27). DUP050149981 Panels* 1" x 3* cold rolled steel panels were sanded and solvent wiped. Painting Method* Duplicate panels were painted, using the "Dry Brush Technique" ( 0.2 ail dry film). The panels were edged with a thicker film of the test primer. Exposure* After ageing four days in the laboratory the painted panels were exposed in the roof condensation box to moisture condensation at night and to the sun and weather during the daylight hours. Reference* Notebook 958. Experimenta 60 and 6l. DUP050149982 fjj uum 11$ SSH m 4tK4 **4m SSf.SS ".If 52SS I! SSS ia 8SSsg ft *4 SS2S&S ^?5 SR&HI *&n I..... 1 ,* * * ** ** A#*** i N S l* * >* * M* K I 4 81 MR CN SI v\4 s$ n n 1*g Q& tim *8r iMr* ** 1 I .8 ! O' 1 !gji i 23 9a <* Poor panel duplication /* y DU P050149983