COMPOSITIONS AND METHODS FOR CLEANING AND STRIPPING
The present disclosure provides a composition for cleaning or stripping a material from a substrate. The composition includes a primary solvent and a co-solvent. The co-solvent includes one or more caprolactam-derived solvents.
1 . A composition comprising:
a primary solvent; and
a co-solvent including one or more caprolactam-derived solvents, the caprolactam-derived solvents according to the general formula:
wherein R is a linear alkyl group of 1, 2 or 4 unsubstituted carbons.
2 . The composition of claim 1 , wherein a concentration of the co-solvent is 5 wt. %-49 wt. % of the composition.
3 . The composition of claim 1 , wherein the one or more caprolactam-derived solvents include at least one of: N-methylcaprolactam, N-ethylcaprolactam, and N-butylcaprolactam.
4 . The composition of claim 1 , wherein the one or more caprolactam-derived solvents include two caprolactam-derived solvents.
5 . The composition of claim 4 , wherein each of the two caprolactam-derived solvents is from 5 wt. %-95 wt. % of the co-solvent.
6 . The composition of claim 4 , wherein the two caprolactam-derived solvents are N-methylcaprolactam and N-ethylcaprolactam.
7 . The composition of claim 4 , wherein the two caprolactam-derived solvents are N-methylcaprolactam and N-butylcaprolactam.
8 . The composition of claim 4 , wherein the two caprolactam-derived solvents are N-ethylcaprolactam and N-butylcaprolactam.
9 . The composition of claim 4 , wherein the caprolactam-derived solvents further include a third caprolactam-derived solvent.
10 . The composition of claim 9 , wherein each of the three caprolactam-derived solvents is from 5 wt. %-90 wt. % of the co-solvent.
11 . The composition of claim 9 , wherein the three caprolactam-derived solvents are N-methylcaprolactam, N-ethylcaprolactam, and N-butylcaprolactam.
12 . The composition of claim 1 , further including a surfactant.
13 . The composition of claim 1 , further including thickening agent.
14 . A method of cleaning a material from a substrate, the method comprising:
applying a composition to the material on the substrate for a period of time to dissolve at least some of the material, the composition including a primary solvent and a co-solvent, the co-solvent including one or more caprolactam-derived solvents according to the general formula:
wherein R is a linear alkyl group of 1, 2 or 4 unsubstituted carbons; and
removing the composition including the dissolved material from the substrate.
15 . The method of claim 14 , wherein the one or more caprolactam-derived solvents include at least one of: N-methylcaprolactam, N-ethylcaprolactam, and N-butylcaprolactam.
16 . The method of claim 14 , wherein the one or more caprolactam-derived solvents include at least two of: N-methylcaprolactam, N-ethylcaprolactam, and N-butylcaprolactam.
17 . The method of claim 14 , wherein the composition further includes at least one of: a surfactant and a thickening agent.
18 . The method of claim 14 , wherein the material includes a paint.
19 . The method of claim 14 , wherein the material includes an ink.
20 . The method of claim 14 , wherein the material includes a polymer resin.