Document 3qnvv1V4eK495270wgnXBLGy
E. I. DU PONT DE NEMOURS & COMPANY
KREBS PIGMENTS DEPARTMENT 256 VANDERPOOL STREET NEWARK. NEW JERSEY
Copy No. 1
Nuaarical File
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NEWARK PLANT PIGMENT COLOR RESEARCH REPORT
Final Report
TGLUIDINB RED: MEDIUM SHADE (E) RT-386-D EVADUATION OF COMPETITIVE SAMPINS "LITHQSOL SCARIS3? BASE M" <MNPT) AND QRCHEM'S WATER-PURIFIED MNPT*
PtodCo,*
NOVEMBER 18-22, 1948.
FILE*
221,31
I DATE:
1/3/49
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i: *
oa^./. a /
N42183
Copy tot
#1 - Numerical Pile 2 * Research Office 221,31 3 - Library Pile 4 - #10 Building Pile 5 - V, Chalupski - Plant Piles 6 - W. F, Spengeman 7 * Extra 8 * Extra
Serial Ho, KH-48-37 Copy No, 1
NEWARK PLANT
PIGMENT COLOB RESEARCH REPORT
PINAL REPOST
TOLUXDINE RED: MEDIUM SHADE (E) RT.386-D. EVALUATION OP COMPETITIVE SAMPLES "LITHOSOL SCARLET BASE M (MNPT) AND ORCHEM'S WATER-PURIFIED MNPT
CHARGES 1100-11-44 A-1-44
SUBMITTED ST* M B. VerNooy
DATE SUBMITTED; 12/6/48
APPROVED BXt A, A. Brizz
a / ; DATE ISSUED*
12/23/48
\
DUP050067111
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In the course of variable studios to improve the masstone depth
and of HT-386-D. a series was run on competitive samples of
MNPT in order to compare their effect on the masstone of the finished
pigment with that of the MNPT regularly used in the laboratory* The samples of MNPT used in this study ares
7
Orchem lot 875 - alcohol purified (control)
Orchem L-6243- water purified
Calco Chemical 0-6636
Sherwin-Williams D-6635
sssaiiim*
In the evaluation of various samples of MNPT against Orchem*s
lot 875, Orchem*3 water-purified MNPT was shown to be satisfactory for use in the (8) RT-380-D formula* The Calco and Sherwin-Williams samples gave a definitely inferior product with the (E) RT-386-D
formula*
hlSCPSSIOR.Qi.fflggm*
The experiments were run on an 0.2 mol basis with no changes in the materials other than the MNPT used* The procedure used was a
modified plant formula ((B) RT-386-B) which gives a laboratory product
lighter than standard RT-386-P. Hone of the samples used offered any
operating difficulties, and there were no significant differences in the yields obtained* In all cases the diaso solution was clarified before coupling with BN and the amount of residue determined*
The following observations were made during the rum
Slurrying of MNPT Into HC1
A Orchem
Lot 875
poor wetting
....B... Orchem L-6243 excel* wetting
.C Calco
B-6636
excel, better
than B.
D.. . Sherwin-Williams
D-6635 net as good as S or C, but bettsr than A*. Foam formed after all MNPT added.
Color of diaso yellow
after 1 hr.
opaque
stirring
Reaction with used *54 g*. sulfamic acid slow
vs*orange sopaque
used *27 g. fast
orange transp*
vs. orange s.opaque - some foam
used .27 g used .27 g* ,
mad.fast
fast - much foam
Wt. residue
0*0831 g.
after filtering
0*323 g*
0*141 8*
% based upon 0.28
MNPT
1*08
0.47
Color of
red,
diaso filtrate dear
yellow cloudy
red, clear
Foam during coupling
relatively foamed,but vs * foam non-foaming broke after
1/2 diaso added.
0.120 g.
0.40
red, clear vs.foam
DUP050067112
3 The netting behavior of Calco's MHPT would indicate that it ia also water-purified. Although all samples are assumed to con tain some wetting agent, the nature of Sherwin-Williams * product seems to indicate an excess of wetting agent present. Contrary to the general tendency of clarified dlasotised MHPT. solutions to turn a reddish-purple when exposed to light, Orcheats water-purified MHPT remained yellow over the 1-1/2 hour addition period. This cannot be accounted for. Hubouts of masstones against Orohem lot 875 showed Calco*s product to be vssto s. dark, Orchem water-purified ws.light, and Sherwin-Williams1 MHPT vva. dark. All are on dull eld# of the control* All are superior to standard BT-386-D in lightness and intensity. Calco's and Sherwin-filliams* MHPT show no improvement over Orchem1s standard production lot 875. There might be a definite advantage in using Orchem*s water purified MHPT because of Its better handling properties if the dullness of masstone could be eliminated. Use of this material bears further investigation. It is expected that a trial run will be made in the plant with it.
See H.B. 1217 Exp. 32.
DUP050067113
