US 12,240,998 B1
Paint remover compositions comprising tetrahydrofuran, alkanediol, and amine and methods of making and using the same
Jonathan Breon, Memphis, TN (US); Tim Teague, Nesbit, MS (US); and Dennis Shireman, Memphis, TN (US)
Assigned to W. M. BARR & COMPANY, INC., Memphis, TN (US)
Filed by W. M. BARR & COMPANY, INC., Memphis, TN (US)
Filed on Apr. 5, 2024, as Appl. No. 18/627,582.
Claims priority of provisional application 63/567,584, filed on Mar. 20, 2024.
Int. Cl. C11D 3/30 (2006.01); C09D 9/00 (2006.01)
CPC C09D 9/005 (2013.01) 28 Claims
 
1. A single-phase paint remover composition comprising:
(a) tetrahydrofuran (THF) at a sufficient concentration to remove paint up to 49.5 wt % of the overall concentration of the single-phase paint remover composition;
(b) a low vapor pressure (LVP) coupling co-solvent comprising an alkanediol, the LVP coupling co-solvent is present at a concentration of 1.5 wt % to 15 wt % of the overall concentration of the single-phase paint remover composition to maintain miscibility of the single-phase paint remover composition and to remove paint;
(c) an amine with a molar volume of <100 cm3/mol; and
(d) water at a concentration of greater than 20 wt % of an overall concentration of the single-phase paint remover composition, wherein a ratio of the LVP coupling co-solvent to THF ranges from 1:19.8 to 1:9.9.