utilize HSPiP sovlent screen to identify potential alternatives for Methyl Ethyl Ketone in the cleaning of leftover adhesive from process equipment.
Date Run:
07/25/2025
Experiment Procedure:
24 scintillation vials were prepared with 15 mL of solvent in accordance with TURI's HSP screening panel. The crosslinker and adhesive provided by the client was then prepared in accordance with the client's instructions with 100 g of adhesive being mixed with approximately 4 g of crosslinker. This was then mixed vigorously and applied to a sheet of aluminum foil. This was allowed to dry for 24 hours and then cut into in equal strips, approximately 1x2 inches in area. These strips were then completely immersed into each of the 24 scintillation vials. The vials were then allowed to sit with observations being taken every 30 minutes for the first hour, and then every hour up until 3 hours. Observations were also taken the following Monday after 72 hours had elapsed.
Trial Results:
Visual Observation Code: 0 - Dissolution less than or equal to 90%, 1 - Dissolution greater than or equal to 90%
Solvent
Appearance at T0
10 minutes
30
40
1 hr.
1.5 hrs.
2 hrs.
3 hrs.
1-Toluene
Clear, Colorless
No change
blue solution
No change
No change
No change
No change
No change, 0
2-Dimethyl Carbonate
Clear, Colorless
No change
No change
No change
No change
No change
No change
No change, 0
3-Xylene
Clear, Colorless
No change
No change
separation from substrate
No change
No change
No change
No change, 0
4-Benzyl Alcohol
Clear, Colorless
Solution slightly blue
blue solution
blue, separation from substrate
No change, 1
No change, 1
No change, 1
No change, 1
5-Ethylene Glycol
Clear, Colorless
No change
No change
No change
No change
No change
No change
No change, 0
6-Methyl Acetate
Clear, Colorless
No change
No change
partial separation from substrate
No change
No change
No change
No change, 0
7-Undecane
Clear, Colorless
No change
No change
No change
No change
No change
No change
No change, 0
8-Ethyl Lactate
Clear, Colorless
No change
No change
No change
No change
No change
No change
No change, 0
9-Acetone
Clear, Colorless
No change
solution slightly blue
partial separation from substrate, blue
No change
No change
No change
No change, 0
10-Ethyl Acetate
Clear, Colorless
No change
No change
partial separation from substrate
No change
No change
No change
No change, 0
11-Methanol
Clear, Colorless
No change
solution slightly blue
No change
No change
No change
No change
No change, 0
12-Ethanol
Clear, Colorless
No change
No change
No change
No change
No change
No change
No change, 0
13-1,3-Dioxolane
Clear, Colorless
No change
No change
No change
No change
No change
No change
No change, 0
14-Diethyl Carbonate
Clear, Colorless
No change
No change
partial separation from substrate
No change
No change
No change
No change, 0
15-1-Propanol
Clear, Colorless
No change
No change
No change
No change
No change
No change
No change, 0
16-Isopropanol
Clear, Colorless
No change
No change
No change
No change
No change
No change
No change, 0
17-Propylene Carbonate
Clear, Colorless
No change
No change
No change
No change
No change
No change
No change, 0
18-Thiophene
Clear, Yellow
coating separated from substrate, 1
No change, 1
no change, 1
No change, 1
No change, 1
No change, 1
No change, 1
19-1-Methoxy-2-Propanol
Clear, Colorless
No change
No change
No change
No change
No change
No change
No change, 0
20-Dimethyl Sulfoxide
Clear, Colorless
solution blue
solution very blue
solution very blue, separation from substrate, 1
No change, 1
No change, 1
No change, 1
No change, 1
21-1-Butanol
Clear, Colorless
No change
No change
No change
No change
No change
No change
No change, 0
22-Dimethyl Glutarate
Clear, Colorless
No change
No change
No change
No change
No change
No change
No change, 0
23-Anisole
Clear, Colorless
solution blue
solution very blue
partial separation from substrate
full separation from substrate, 1
No change, 1
No change, 1
No change, 1
24-2-Butoxyethyl-Acetate
Clear, Colorless
No change
No change
No change
No change
No change
No change
No change, 0
25-Methyl Ethyl Ketone
Clear, Colorless
solution blue
coating partially separated from substrate
separation from substrate, 1
No change, 1
No change, 1
No change, 1
No change, 1
Success Rating:
Preliminary compatibility tests on substrate coupons encouraging for at least one cleaning chemistry. More in-depth laboratory testing necessary.
Conclusion:
Based on the results of this HSP trial, Benzyl Alcohol, Thiophene, 1-Methoxy-2-Propanol, and Anisole are recommended as potential alternatives that will advance to the next stage of testing.
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