To evaluate the effectiveness of spot cleaning a stainless steel surface with a solvent to remove acrylic and silicone adhesives.
Date Run:
03/05/2020
Experiment Procedure:
Four pre-weighed stainless steel coupons, two for each adhesive, were soiled for each contaminant tested. Approximately 0.25 g of the soil was applied using a hand held swab. Each set of coupons were manually wiped with a cloth of the same material, dipped into heated (100° F) and unheated Sta-Sol® ESS 160. During this process, any noticeable soil removal was observed and recorded. Coupons were allowed were wiped with a paper towel to ensure no residue of the cleaner, and afterwards final weights were recorded. The efficiency of removal was calculated for each coupon cleaned.
Trial Results:
Cleaner
Soil and Temp.
Initial wt. of cont. (g)
Final wt. of cont. (g)
% Cont. Removed
% Average
Sta-Sol® ESS 160
Acrylic Heated
0.4296
0.0028
99.35
98.31
Acrylic Unheated
0.3395
0.0093
97.26
Silicone Heated
0.3980
0.004
98.99
96.74
Silicone Unheated
0.3535
0.0195
94.48
The cleaner evaluated overall performed better when heated compared to room temperature, but not a noticeable deference gravimetrically. The removal force exerted for the heated cleaner was less in contrast to the room temperature coupons. The acrylic in comparison to the silicone adhesive required more effort in the process. The acrylic adhesive needed more force during the manual wipe, with more pressure applied with the thumb in the spot clean. Some areas of the room temperature coupon were spot cleaned with the addition of even more applied pressure.
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Sta Sol ESS 160 was effective with removing both heated and unheated of acrylic and silicone adhesives using a spot cleaning method. A comparison to toluene will be made during the next round of testing.
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