Document RaJm9KpKvVrGJr8y2jeMzDBEv
Monsanto
FROM (NAME * LOCATION)
.
T. C. Mathis, St. Louis Research Dept.
OATE
-:
9URJECT REFERENCE
: 1
:
TO :
December 18, 1967
National Starch
ecw/awmc
11-27-67
E. C. Wilde - EWLLD
cc: M. W. Farrar - Res 1 J. R. Darby - Res 2 R. M. Parks - RPARK W. F. Waychoff - WWAYC
J. S. Bagnall - JBAGN J. A. Cannon - Res 3
W. M. Coaker - Res 3 -- ^ R. H. Mills - Res 3
N. W. Touchette - Res 3
f?
The attached tabulation of test results gives per formance comparisons for S-218A CS-l6o/s-l4l/DIBP
75/15/10), S-885 (S-160/DIBP 90/l0), and Benzoflex
50 in National Starch's vinyl acetate emulsion
(Resyn 25 1011). This is the data I gave you
by phone on December 15. According to this data our plasticizers perform well. Although the vola
tilities of S-218A and S-885 are somewhat higher
than the Benzoflex 50, we offer slightly lower viscosity with S-218A and slightly higher viscosity
with' S-885. Viscosity stabilities and wet tack are
equal,.and tensile properties are improved.
As you observed during our telephone conversation the poor elongation with Benzoflex 5 before 75 aging suggests that it does not give-,complete resin solva tion during room temperature aging.
''
Time: 16 hours
attach, ds
.
'.
' T. C. -Mathis .
DSW 586961 STLCOPCB4092295
J
National Starch (Benzoflex 50 Evaluation8,
S-218A
S-885
RPM
Initial viscosity (Brookfieldl 12
Viscometer LVP Spindle #4):
30
60
Viscometer, Spindle #4)
.d 12
30
60
6550 6180 6000
6130
5860
5670
7700 7080
6650
7100 6680 . 6500
Wet Tack time (seconds using Av.
3-mil, 2-inch/blade)
Med.
13
.
Volatility at 75C. ($ weight lost)
1 da. 2 da.
1.45 2.09
Tensile properties^1 (aged
5 da. at 23*c)
.
Tensile 1570 100$ Mod,. 590 $ Elong. 335
. ;,
Tensile properties0(aged
3 da. at 23*C. and 2 da.
at 75C.
Tensile 2000.
100$ Mod., 876
$ Elong. 330
13
1.36 2.03 .
1710
680
335
1970 910
' 325
B-50
7250
6780 6630
6750 6400 6230
. 13 12
0.93 1.14
1510 710 295
1910 910
320
(a) Formulations were 10 parts of plasticizer per 90 parts of National Starch Resyn 25 1011. There-were, no observed
. differences in ease of addition of plasticizer.
(b) Jaw speed was 20 in./min.
.
j DSW 586962 fft
l
ft .
t _________________ --------------- --
STLCOPCB4092296
