Document q3E9BxB8LMjVKxwgGXqw7w3DM

E. I. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK, NEW JERSEY Serial No. KN-51-37 Copy No. 1. Numerical File NEWARK PLANT <9 PIGMENT COLOR RESEARCH REPORT JACKSON LABORATORY Progress Report ALIZARINS TONERS, KS 269 and 346 Period Covered MAY 20, 1949 TO APRIL 30, 1951 u NJ 9747 FILE* DATE; 223.51 6/13/51 0-51-37 Copy to 1. Numerical File 2. Research File - 223.51 3. Library File - 223*51 * ** * ng-A,fc,,o n S. Kr*TA, 9* Mr. J. 10. Mr. J. 11* Extra ,on Lab* D* Reidinger, * * M. Tinker, * M. Tinker, * JACKSON LABORATORY PIGMENTS GROUP RESEARCH REPORT ALIZARINE TONERS, KS 269 and 346 MAT 20, 1949 to APRIL 30, 1951 SUBMITTED BY: A. D. REIDINGER APPROVED BT : tf. S. STRUVE DATE SUBMITTED: 6/51 DATE ISSUED: 6/13/51 DUP050068590 iMiy DgCTIOH,:. In the work by Fierz-David and Rutishauer on the constitution of Alisarine lakes (reported In Helvetica Chiaica Acta Sj&, 1298-1311, 1941) the preparation of a calcium-aluminum complex of Alisarine {1, 2 dihydroxy anthraquinone) free of bubatrata was described. Interest in the possible Talus of this product lead to its preparation and evaluation. AgDJIQNCLUSIONS; Samples of Alisarine Toner, prepared by a modification of a method outlined in the Fiers-Bavid and Rutishauer article, were much darker than Alisarine Lake, RT-332-D, both in full shade enamel and by rubout. The dry color, because of its hard texture did not show the tinting strength to be expected in a substrata free product. Although the product was not analysed, the yield obtained indicated that it possessed the suggested constitution - 4 mole Alisarine - 2 atoms aluminum - 3 atoms calcium - 5 mols Hz0. Samples of both dry color and pulp hare been submitted to F & F as KS 269 and K8 346, respectively. Three months Florida exposure of KS 269 by our laboratory (Series 10091) showed it to he superior to RT-332-D and practically equal to Arylide Haroon, RT-551-D. The manganese-chromium derivative was also prepared and although bluer and duller than the Ca-Al complex, was slightly hstter in lightfastness by Fade-O-Meter test. Further work Is planned to he done at the Newark Laboratory. 1 amEiim d et ail s : The procedure employed was based on Experiment 7 of the Fierz-D&vid report and consists of addition of ths alkaline (HaOH) solution of Alisarine to calcium and aluminum acetates, followed by acidification and development at a boil. Use of an equivalent mixture of calcium and aluminum chlorides with sodium acetate gave better strength and lightfastness. Other details are found in the following experiments:SB 1336 Exp. 9 & 17 NB 1353 Bxp. $ & 9 HB 1396 Exp. 3 ADRilg DUP050068591