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Durability Test

Purpose: To test durability of hardened PS-403 and PS-403E impregnant against various pH and solvent.
Test Sample: A test sample to be hardened wihin an aluminum tube of 17x50x3mm at a 90 degrees celcius hot bath for 30min.
Testing Conditions: Dipping a test sample in each solvent for 7 days and
(1) Dried in standard condition
(2) Dried in an oven at 100degrees Celsius for 1 hour

Weight Change = 100% * (Wo - Wf) / Wo

Test Results

Tested In Impregnant Weight Change
[wt%]
Initial Hardness
[Shore-D]
Final Hardness
[Shore-D]
Gasoline PS-403 (1) 0.46
(2) 0.45
80 83
PS-403E (1) 0.53
(2) 0.52
81 82
Solvent(mixture)
Toluene 40%
Benzene 40%
Xylene 20%
PS-403 (1) 0.33
(2) 0.31
80 82
PS-403E (1) 0.43
(2) 0.41
81 84
Acid: H2SO4
(0.1N/pH1)
PS-403 0 80 80
PS-403E 0 81 81
Alkali: NaOH
(0.1N/pH13)
PS-403 0 80 80
PS-403E 0 81 81