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K-t 430 3 ....... *' > PIGMENTS DEPARTMENT CHESTNUT RUN *>% LABORATORY?REPORT SECOND AND FINAL 1 fV {' ` J '*s ; v;'f:1M; CUSTOMER DISTRIBUTION WORK REQUEST NO. NC-3-74 DATE `July 14 , 1975 H. W. Llng/E. W. Stewart/ Pigm. C. R. File L. A. Schlapfer/J. R. Webster, Pigm,, C.R. \ J, Jackson, Pigm., Newark C/F. Rolle, Pigm., Wilm. R. Gedd, Pigm,, Newark. W. S. Struve, Pigm., Newark y> SUBJECT COWLES DISPERSIBLE MONASTRAL BLUE 0. BI-476-D / ': Xw'i > i/.'v. t - OBJECT Evaluate plant: produced and finished BT-476-D, Lot 55462, 55468 and experimental 75-00675-2 versus Ciba Geigy's LGLD' and BT-383-D for Cowles dispersibility in a heatset Ink vehicle. .57;:7 - Compare Cowles quality to purchased commercial flushings. Determine whether BT-476-D would be a desirable 3-roll mill dispersible product for promoting in oleoresinous ink systems. 1 ' ,f ! ' >A w: CONCLUSIONS 0 BT-476-D production lots, BVM83-D and.experimental are not Cowles dispersible. ^ ..... < ' 1 . BT-476-D Cowles dispersion quality is better than the poorest quality of the commercial flushings obtained. Two commercial flushings were superior in dispersion quality. 'V BT-476-P is equal to very very' slightly superior in dispersion to - BT-383-D,our present 3-roll mill product. ' ,s We recommend R&D work be continued to develop a Cowles dispersible product as there is growing interest in this type product. N35382 Lab Work By: G. W, Rodgers sig (y n e -/ . /iJ. A. Mackiewicz/A - 2 *- NC-3-74 SUMMARY ... Cowles Dispersion . BT-476-D production lots, BT-3.83-D and experimental did not develop satisfactory texture whereas LGLD developed good texture (3 NPIRI) after one canning pass over the mill. Modifying the method to compensate .for the lower viscosity of BT-476-D did not improve dispersibility of the two BI-476-D production lots or the experimental; BT-383-D was not included in this test series. . Of the three commercially obtained flushings, Hilton Davis' Peacoline Blue and Chemetron's Phthalo Blue G, are superior in quality (O-NPIRI). flushing made by Wykoff Chemical Co. using Chemetron's Phthalo . Blue G, presscake had a 10 NPIRI texture rating, whereas, BT-476-D production , lots rate 6.0 on NPIRI texture gauge. The textures of the flushings indicate ' there may be different flushing quality sold, Tinctorially, BT-476-D, L-55462 and exp. 75-00675 versus LGLD in masstone are generally dark and intense in reflected undertone (print tone), green and less intense in tint. Versus LGLD, L-55462 is equal in strength and the experimental is 17.5% weak. 3-Roll Mill Dispersions Versus BT-383-D, BT-476-D is generally very very slightly superior in 3-roll mill dispersibility properties (tailings, separation, texture) tested in three vehicle systems, Thermex A-6E, (heatset) #1 transparent varnish (linseed oil) and Terlon #3 (alkyd). LGLD included in the tests is no better than BT-383-D or BT-476-D as a 3-roll mill dispersible product. In the Thermex vehicle system, tinctorially versus BT-383-D, BT-476-D is generally dark in masstone and red in^tint. Strength varies (See Tables IV, V & VI. EXPERIMENTAL DETAILS Pigments Tested LGLD Cj?72104 BT-383-D, PS-97644 BT-476-D, L-55462 BT-476-D, L-55468 Experimental 75-0075-2 Cowles & 3-roll mill i ii <i ii Cowles Only it Flushings Tested Hilton Davis Peacoline Blue 5-66-4-319 Chemetron Phthalo Blue G, FCS-116 C//73222 C//73223 Wykoff Chem. Co. - Chemetron Pthtalo Blue C//75474 DUP050109389 Grind Details Cowles Dispersion (Ref. TF-2302) Regular Method LGLD C//72104 BT-476-D L-55462 W Grind (30 Min.) Pigment Thermex A6E Solvar ,, i 44 150 19 60 143 26 Reduction Thermex A6E -- 61 Magie Oil 26 31 The above was then passed over the 3-roll one-medium tight pass. Modified Method After 30 minutes on the Cowles, the grind portion was not reduced but passed over the 3-roll mill one medium tight' pass. 3-Roll Mill Dispersion All pigments tested were given 5 medium tight passes over the 3-roll mill. The grind pigment/vehicle ratios were: Thermex A6E #1 Transparent Varnish Terlon #3 25/75 35/65 35/65 REFERENCES ILF 5-74 (1) BT-383-D, BT-476-D, L-55468 and the experimental were done using the same formula. JAM/ras 7/14/75 DUP050109390 DU P050109391 T- N 4A ro $? $ ^Q0' S3 & *l5* ! *> *} \o *> . '? 5 Si %'S. ,,H. V) <Q 4j iS l5^ v* ft >S i v K X ON < *I >1 ^ '$yS- V) *# *3 O O Jo o 0 0 v. ^ VA t 0O ' *v ' OsN'J.X^^ ........' Ho V> Q ** $q <A c4 <A ^ ^VjVj '3v 5n . V f) 4 ^ !) K *5? <*4 *??K &^ K,V'w4 ,S,fNt'" a 4^ \5 r* -4 >T' <L> ---- j DUP050109392 fj I V, K. X vi o. c4 vS & > v <S 8<si ' >9 ^ .51 11* V4 #J vt 4 VD <fc$ DU P050109393 DUP050109394 1 <=\ a nS *3 -i 4 T"o' o U oo "o' o T 1 i**A> 6 2 ca \ VV **$ Ol ^4* 7a &> ^k 4 y% AV # h <5n V* *4 f> MN VS o Ci ^ N> Q V A I >5 ^ C, g*\ R *o 4^-^v \j VS: ^ vi l DUP050109395 .6 A. DUP050109396