To test the efficacy of four previously identified solvents in removing two types of glue adhesives from stainless steel coupons using unheated immersion methods.
Date Run:
02/09/2024
Experiment Procedure:
Three pre weighed stainless steel coupons were used per each soil per cleaner for a total of 24 coupons. The coupons were then soiled with their respective adhesives, half being soiled with adhesive 5017 and half being soiled with adhesive 5024. The soils were heated to 245 degrees F in order to melt the adhesives to a degree that would allow for a small amount of adhesive to be picked up using a spatula. The adhesive on the spatula was then reheated using a heat gun in order for the adhesive to be able to spread on bottom third of the coupons. The dirty weights of the coupons were then recorded.
The coupons soiled with adhesive 5017 were subjected to 25 mins of unheated immersion with a stir bar set to 200 rpm in their respective cleaners. After the coupons were removed from the cleaner after 25 minutes, it was observed whether or not to continue with a manual wiping step (a singular wipe using a paper towel). The coupons soiled with adhesive 5024 were subjected to 45 minutes of unheated immersion with a stir bar set to 200 rpm. All coupons soiled with adhesive 5024 were subjected to a manual wiping step (a singular wipe with a paper towel) after being removed from their cleaners.
All coupons were allowed to air dry for 10 minutes before having their final weights recorded.
Trial Results:
Cleaner
Soil
Initial wt of cont.
Final wt of cont.
%Cont Removed
% AVG
% Overall
anisole
adhesive 5017
0.2001
0.0130
93.50
93.94
95.63
0.3363
0.0178
94.71
0.2223
0.0142
93.61
adhesive 5024
0.3312
0.0070
97.89
97.32
0.2549
0.0070
97.25
0.2075
0.0066
96.82
methyl acetate
adhesive 5017
0.2242
0.0020
99.11
97.97
95.87
0.2800
0.0121
95.68
0.2642
0.0023
99.13
adhesive 5024
0.2709
0.0095
96.49
95.87
0.2300
0.0128
94.43
0.1483
0.0049
96.70
ethyl acetate
adhesive 5017
0.2039
0.0038
98.14
98.74
98.24
0.2274
0.0010
99.56
0.1081
0.0016
98.52
adhesive 5024
0.1594
0.0005
99.69
97.74
0.4201
0.0254
93.95
0.2318
0.0010
99.57
diethyl carbonate
adhesive 5017
0.5141
0.0026
99.49
99.81
98.22
0.1976
0.0001
99.95
0.2453
0.0000
100.00
adhesive 5024
0.2127
0.0032
98.50
96.62
0.1056
0.0014
98.67
0.2491
0.0182
92.69
Manual Wipe Required for Adhesive 5017?:
anisole: yes
methyl acetate: no
ethyl acetate: no
diethyl carbonate: 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:
All solvents tested, anisole, methyl acetate, ethyl acetate, and diethyl carbonate, are highly effective in removing both adhesive soils from stainless steel coupons utilizing unheated immersion methods.
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