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Trial Number 4

Trial Purpose:

To test the efficacy of solvent blends in removing two types of glue adhesives from stainless steel coupons using unheated immersion methods.

Date Run:

09/05/2023

Experiment Procedure:

Three pre weighed stainless steel coupons were used per each soil per cleaner for a total of18 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 were then subjected to 45 minutes of unheated immersion with a stir bar set at 200 rpm in their respective cleaners.  Once the coupons were removed from the cleaners, a manual wipe step was utilized (a singular wipe with a paper towel).

All coupons were allowed to air for 30 minutes before final weights were recorded.  

Trial Results:

Cleaner Soil Initial wt of cont. Final wt of cont. %Cont Removed % AVG % Overall
Ethyl 3-Ethoxypropionate 79% + butyl acetate 7% + ethyl lactate 14% adhesive 5017 1.0334 0.5079 50.85 64.59 48.92
1.2842 0.3290 74.38
0.9711 0.3054 68.55
adhesive 5024 0.8123 0.5519 32.06 33.24
0.6360 0.4831 24.04
0.4588 0.2587 43.61
Ethyl 3-ethoxypropionate 46% + benzyl benzoate 54% adhesive 5017 0.6814 0.6048 11.24 35.64 24.57
1.3022 1.1563 11.20
1.4817 0.2299 84.48
adheive 5024 1.2073 1.0339 14.36 24.57
0.6462 0.6055 6.30
0.6020 0.2826 53.06
D Limonene adhesive 5017 1.6258 0.5617 65.45 73.03 59.26
1.2171 0.0764 93.72
2.0079 0.8050 59.91
adhesive 5024 1.2555 0.6346 49.45 45.50
0.7881 0.3218 59.17
1.0275 0.7410 27.88

Performance improved with increasing percentages of Ethyl 3-Ethoxypropionate.  Ethyl 3-Ethoxypropionate will be tested at full concentration on its own.

Success Rating:

Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

Conclusion:

None of the solvent blends/solvents were effective in removing either adhesive from stainless steel.  

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