Trial Purpose:
utilize HSPiP sovlent screen to identify potential alternatives for Methyl Ethyl Ketone in the cleaning of leftover adhesive from process equipment.
Date Run:
07/24/2025Experiment 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.
