Evaluating the effectiveness of alternative cleaners identified from prior Hansen Solubility Parameters Test
Date Run:
02/09/2024
Experiment Procedure:
Stainless Steel Coupons were weighed prior to soiling with supplied adhesives, Adhesive 5017 and Adhesive 5024. The coupons were weighed again after soiling before being immersed in the chemicals being tested, that being Anisole, Methyl Acetate, Ethyl Acetate, and Diethyl Carbonate. For the Adhesive 5017, the coupons were immersed in the unheated solvent for 25 minutes and then checked to see if a manual wipe step was necessary to remove the remaining adhesive. The coupons were then allowed to dry overnight before final weights were taken. The procedure for Adhesive 5024 was almost identical, except that the immersion time was 45 minutes instead of 25 minutes, followed by a check for a manual wipe step, drying overnight, and final weighing.
Trial Results:
Cleaner
Contaminant
Initial Contaminant Weight (g)
Final Contaminant Weight (g)
% of contaminant removed
Overall % Removal
Manual Wipe Step?
Anisole
5017
0.1998
0.0127
93.64
93.99
Yes
0.3363
0.0178
94.71
0.2223
0.0142
93.61
5024
0.3312
0.0070
97.89
97.32
Yes
0.2549
0.0070
97.25
0.2075
0.0066
96.82
Methyl Acetate
5017
0.2242
0.0020
99.11
97.97
No
0.2800
0.0121
95.68
0.2642
0.0023
99.13
5024
0.2709
0.0095
96.49
95.87
Yes
0.2300
0.0128
94.43
0.1483
0.0049
96.70
Ethyl Acetate
5017
0.2039
0.0038
98.14
98.74
No
0.2274
0.0010
99.56
0.1081
0.0016
98.52
5024
0.1594
0.0005
99.69
97.74
Yes
0.4201
0.0254
93.95
0.2318
0.0010
99.57
Diethyl Carbonate
5017
0.5141
0.0026
99.49
99.81
Yes
0.1976
0.0001
99.95
0.2453
0.0000
100.00
5024
0.2127
0.0032
98.50
96.62
No
0.1056
0.0014
98.67
No
0.2491
0.0182
92.69
Yes
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
The results of this experiment are promising, and show that the HSPiP Analysis conducted in the prior experimental trial was accurate to the adhesives being examined. While unfortunately no solvent was able to completely remove the need for a manual wipe step, both methyl and ethyl acetate eliminated the need for a manual wipe step for Adhesive 5017. Unfortunately, only Diethyl Carbonate was somewhat successful in removing the manual wipe step for Adhesive 5024, with 2 of the three coupons not requiring it. Manual wipe notwithstanding, all the solvents selected were very effective at removing the adhesive soils, with every trial achieving over 90% adhesive removal. Ethyl Acetate and Diethyl Carbonate had the highest average percent removal for adhesive 5017, at 98.74% and 99.81% respectively, while Ethyl acetate and Anisole had the highest average percent removal for Adhesive 5024, at 97.74% and 97.32% respectively.
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