Document gbrwXK72DzGROL0Q4q93vk55e

E, I. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK, NEW JERSEY Serial Ho. N~4813 Copy No. ^ Numerical File NEWARK PLANT PIGMENT COLOR RESEARCH REPORT final Seporfc RQSimsCBD hismh INJBIES 3 TOlSa* PASS MfiSSTOHB m&x. o f 10=2040. Period Covered; 1944 0 ft *. FILE; 222o21 DATE; 10/6/43 X 1 N42162 DUP050066990 Copy tot 1 - Numerical File 2 Research Office (222.21) 3 * Library File (222,21) 4 - #10 Building File 5 - V, Chalupski, Plant Filer 6 * W. F. Spengeman, Newark 7 * Extra Serial Ho, KN-48-13 Gopf No. 1 NEWARK PLANT PIGMENT COLOR RESEARCH REPORT Final Report ROS HATED L1TH0L ROBINS B TONER. BARK MISSIONS SEMI-WORKS TRIAL OF K-2040. NOVEMBER, 1044 SUBMITTED BY* S. J. HESS C APPROVES BY* 1, 0. MORRISON DATE SUBMITTED* 6-30-48 d at e is s u ed * 10/6/48 DUP050066991 Original research study on dark! kin* wDuolM Carmine toner was based on the supposed threat to BT-443-D business resulting from the development of TArginia Red. CR-6510, by Standard Ultramaiins. this pigment was said to give better money value in blends with Molybdate Orange end RT-427-0 than BT-443-D. the first laboratory develop* msnt, K-1669. wee similar to the early direct laklng Bf-443-D formu lation* S-1552, except for the substitution of approximately 20 mol $ of Tobias gold for the Para tolutdins meta sulfonic sold in the diazo. (see KH-42-82) Subsequently, a new product. K-2040, similar to K-1669* based on X-2039, the ''all llmeM formula for BT-443-D, was developed in the laboratory in early 1944* (See KH-44-49). A semi-works mol batch of K-2040 was made in Koveaber, 1944, to supply material for evaluation. For the semi-works trial batch a formula similar to K-2040, except for a 10$ cut in the rosin, was selected. The rosin decrease was used in an attempt to obtain improved hiding (K-2040 was on the defensive versus Virginia Red in this respect)* So difficulty was encountered with the process and the batch, lot 7668, ground out light in masstons, close in strength and slightly blue in tint versus K-2040. The rosin decrease Is the probable reason for the lighter masstone. Alkyd grinds showed that although a very slight improvement in opacity was obtained, the objection to the pigment expressed in PLM-4 (DBS 7-6-44) Is still valid, i*e., that in blends the advantage of the dark masstone is far outweighed by the necessity for a higher pigmentation to obtain the desired opacity* As the increased transparency eliminates K-2040 as a substi tute for Virginia Red it was submitted to Sales early in 194? to be presented to the trade as a companion color to RT-443-D. Development work on this pigment has been discontinued* umwLMmmm There is no patent restriction in the manufacture of K-2040* It is not believed that this study has resulted in any patentable development. DUP050066992 QLQSGARY Msm& * A calcium salt of the coupling of para toluidine aeta sulfonic said diazo and beta hydroxy naphthoio acid. Ah approximate 25* of calcium roainate is also present* K-1669 ft g=aas_ Similar to HT-443-D except approximately 20 mol % of Tobias Acid (Beta naphthylamine-l-sulfoalc acid) has been substituted for part of tho PTMSA. K-1552 5=8033- Similar to BT-443-D. Virginia ____ gftfl-. A calcium salt of the ooupling of ortho-ehlor-meta-. toluidina-para-sulfonic acid diazo and beta hydroxy naphthoic acid* A coupling of para-chlor-ortho-nitranillne diazo and beta aaphthol* Molybdate Jteawau. A molybdated lead chromate pigment. b s h -48-9 t S DUP050066993