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EC number: 701-029-8
CAS number: -
of test runs 1 & 2 at 20°C were found to be outside acceptable
tolerance for repeatability, therefore a 3rdtest
run was performed. The result at 20°C has been reported as the
mean of test runs 2 and 3.
run 1 provided a result of 1624 mm2.s-1(flow
time of 412.22 seconds).
Objective and Information
determine the viscosity of a fluid.
The test is conducted in accordance with ISO 3104:1994 and OECD Test
viscometer is charged with sample to the upper charging mark
with precaution, so that the walls above the mark are not made
wet by sample. Sample is then allowed to flow in an unbroken
column through the capillary to about 5 mm below the lower
charging mark. The flow is stopped by closing the timing tube
and more sample added to make up to the mark. The viscometer is
then allowed to attain temperature equilibrium, and then the
timing tube is opened to allow the sample to flow to the lower
charging mark. The tube is closed again and the upper level of
the sample is adjusted by adding or removing sample.
timing tube is opened to allow the liquid to flow under its own
head. The time, to within 0.2 seconds, is measured as the sample
transverse the tube from the bottom of the lower timing mark to
the upper timing mark. Liquid surface is taken as the uppermost
portion of the advance liquid.
viscometer is cleaned with a suitable solvent, dried, then
refilled and flow time measurement is repeated.
kinematic viscosity of the specimen for each run is then
obtained from the expression Kinematic viscosity = Ct (mm2.s-1)
= Constant of the viscometer, t = Flow time in seconds.
to 300000 mm2.s-1
0.6 % to 1.2 %
Testing standard: CIPAC method MT 22 1994, reprinted 2007
Viscometer, Thermometer and Stop watch.
All substances of the MDI category except the monomeric MDI substances are liquid at room temperature. The kinematic viscosities are broadly consistent due to the presence of a relatively high concentration of mMDI. All the other substances of the MDI category are liquid at room temperature. The kinematic viscosities are broadly consistent due to the presence of a relatively high concentration of mMDI. A supporting study was performed at Chilworth (2015). A new study to determine the viscosity of the substance was performed at Dekra (2019). The test is conducted in accordance with ISO 3104:1994 and OECD Test Guideline 114 and gave the following results:
At 20°C (mean of 2 runs) 1184 Cst; at 40°C (mean of 2 runs) 191 Cst
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