Document QJzBy3j53NXBOyOBae8vwVvO4

APPROVED} J.' c: KINAHAN . ,T PGNSOL" COLORS AREA BBPMBKS 30. 1943 CHAMBERS WORKS PROCESS FOR THE MANUFACTURE OF "LITHOSOL" FAST VIOLET 4RNL PASTE HISTORICAL Tills Is the first issue of a Chambers Works Process. The product has been developed during 1947 for the pigment trade. f'Lithosol" Fast Violet 4RN Paste Crude was found to be more acceptable for this product than$ "Ponsol" Bril liant Violet 4RN Paste Crude. PATENT STATUS The patents on this product have expired. The original patent is U.S. 1,005,268 (1911) assigned to the Badische Company and U.S. 1,525,117 (1925) assigned to du Pont. See Carrollville Cases 621 and 621-A. .. The milling of an anthraquinone color paste and the dispersion of this paste by means of Compound #8 (Leucanol) is not dominated by any existing patents. See AN-950 sud 950 Supplement} also Carrollville Cases 715 and 715~A PRINCIPLE ft Lithosol" Fast Violet 4RN Paste Crude is charged to a mixer with not more than 0.1$ of 50$ Compound # and the paste is milled thoroughly using an F&B mill. The final product is packed through a 200-mesh screen. r1 "Lithosol" Fast Violet 4RNL Paste 2- - EQ.UIPMEKT ''ponsol" Standards #1 - Building -#l8l Mixer; This may be any vertical steel or stainless steel tank, equipped with a gate type agitator which, turns at the rate of 15 to 25 rpra. The agitator should not clear the sides of the vessel by more than 1 to 1-1/2 inches. The material in the vessel is discharged to an F&B mill or a centrifugal pump through a 2-inch bottom outlet. Mill: A standard P&B mill with adjustable clearances is used for this work. i Pumpi Any suitable pump, centrifugal or reciprocating. Centrifuge; This is a Sharpies high speed centrifuge rotating at 11,000 to 15,000 rpm. Heavy material separated from the paste is removed from the bowl by hand. Screen; A 200-mesh Monel metal screen in a Universal riddle is used in conjunction with the Sharpies centrifuge. PROCEDURE Materials Colors Lbs. 100# Lbs. Other Pts./ Std. matls. part Eauiv. lbs. product "Lithosol* Fast Violet 4RN paste Crude 1100 10,000 1.0 Compound #8 100$, as a 50$ solution 5 0.0005 "Lithosol" Fast Violet 4h w l Paste -- 10,000 1.0 Yield - 100$. Charge the mixer with 10,000 pounds standard equivalent of ,lLithosoln Fast Violet 4BH paste Crude. Add 10 pounds of 50$ Compound #8, or less, and mix until a smooth paste is obtained. Then mill the lot with F&B mill with plates set close for 4 to 8 hours. Adjust the solids to 11.0$ and send a sample to the Technical Laboratory to be tested as a '''Lake". The initial report from the Technical Laboratory will aid in deciding how much more milling will be necessary. Ifllhen Technical Laboratory tests are satisfactory, pack the lot through the 200-mesh screen. DUP050467819 LithosolH Blast Violet 4RNL Paste 5- _ Samples are taken at the beginning, middle, and end of the lot and submitted to the Technical Laboratory for f,0K Ship", and for final solids. The packed material is tintagged and shipped to the Chambers Works Shipping House. In packing this material, care should be taken to keep the containers clean in order to avoid the necessity of repaint ing them. Samples; 1. A sample of the lot is taken daily for determina tion of solids by the alcohol and ether method. 2. A mixer sample is taken before the lot is packed and run for float test. < 5. A sample of the lot is taken daily and submitted to the Technical Laboratory for application tests. 4. Samples from the beginning, middle, and end of the packed lot are submitted for solids and H0K Ship" tests. SPECIFICATIONS 1. ^Lithosol" Fast Violet 4RN Paste Crude; A laboratory preliminary made by milling with 0.1$ of 30% Compound 8 shall give a satisfactory "leking1* test. 2. ''LithosolH Fast Violet 4RNL Paste: Shall be accep table in shade and strength versus Lot 1. Solids shall be 11.0$ A&E. HAZARDS "Lithosol" Fast Violet 4RN is a chlorinated deriva tive of isodibenzanthrone. This dyestuff is known to produce dermatitis on some sensitive people and it may also be carcinogenic in its action, due to impurities which it may contain. DUP050467820 3-15-48 HISTORICAL: CHAMBERS WORKS PROCESS FOR THE MANUFACTURE OF LIT5030L FAST VIOLET 4RNL PASTE Tala product has been developed during 1947 for the pigment trade. "LIthosol8 Fast Violet 4RN Paste Crude was found to be more acceptable for this product than "Ponsol* Brilliant Violet 4r n Paste Crude, PATENT STATUS: The patents on tni.a product have expired. The original patent is u.S* 1,003,268 (1911) assigned to the'Badische Company and U.S. 1,525.117 (i925) assigned to DuPont, See Carrollville Cases 621 and 621-A. The milling of an Anthraquinone color paste and the dispersion of this paste by means of Compound #8 (Leucanol) is not dominated by any existing patents. See AN-950 and 950 Supplement. Also Carroll ville Oases 715 and 715-A. PRINCIPLE; "Lithosol8 Fast Violet 4RN Paste Crude is charged to a mixer with not more than 0.1$ of 30$ Compound #8 and the paste is milled thoroughly using an F & B Mill. The final product is packed through a 200 mesh screen. EQUIPMENT: "Ponsol" Standard #1 Refer to Chambers Works Process for the manufacture of "Lithosol" Fast Violet 4RN Paste, PROCEDURE; Materials Colors Other Pts/Pt Lbs, 100$ Lbs.Std.Eaulv.Mat*18 Lbs.of Pro "Llthosol" Fast Violet 4RN Paste Crude Compound #8 (100$) as a 30$ Solution "Lithdsol" Fast Violet 4RNL Paste . Yield - 100$ 1100 10,000 10,000 1.0 0,0003 1.0 Charge the mixer with 10,000 lbs. standard equivalent of "Llthosol8 Fast Violet 4RN Paste Crude. Add 10 lbs. of 30$ Compound #8, or less, and mix until a smooth paste is obtained. Then mill the lot plates set close for 4 to 8 hours. Adjust the solids to 11.0$ and sSnd a sample to the Technical Laboratory to be -1 k DUP050467821 N33027.01 tested as a "Lake", The initial report from the Technical Laboratorywill aid in deciding how much more milling will be necessary, When Technical Laboratory tests are satisfactory, pack the lot through the 200 mesh screen, Sainples are taken at the beginning, middle and end of the lot and submitted to the Technical Laboratory for "OK Ship"- and for final solids. The packed material is tin tagged and shipped to the Chambers Works Shipping House. In packing this material care should be taken to keep the containers clean in order to avoid the necessity of repainting them, SAMPLES; 1, A sample of the lot is taken daily`for determination of solids by the alcohol and ether method, 2, A mixer sample is taken before the lot is packed and run for float test, 3, A; sample of the lot is taken daily and submitted to the Technical Laboratory for application tests, 4, Samples from the beginning, middle and end of the packed lot are submitted for solids and "OK Ship" tests, SPECIFICATIOSSt 1. "Lithosol" Fast Violet 4RN Paste Crude A laboratory preliminary made by milling with 0,1# of 30# Compound #3 shall give a satisfactory "baking" test. 2, "Lithosol" Fast Violet 4r mL Paste 1, Shall be acceptable in shade and strength versus Lot 1, 2, Solids shall be 11.0# A & E* HAZARDS? "Lithosol" Fast Violet 4RH is a chlorinated derivative of Isodibenzanthrone, This dyestuff is known to produce dermatitis on some sensitive people and it may also be carcinogenic in its action, due to impurities which it may contain. i ^' A. J. Hayward AJH:lr - 2~ I DUP050467822