US 12,247,139 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 Oct. 2, 2024, as Appl. No. 18/904,420.
Application 18/904,420 is a continuation in part of application No. 18/627,582, filed on Apr. 5, 2024.
Claims priority of provisional application 63/567,584, filed on Mar. 20, 2024.
This patent is subject to a terminal disclaimer.
Int. Cl. C11D 3/30 (2006.01); B08B 3/08 (2006.01); C09D 9/00 (2006.01)
CPC C09D 9/005 (2013.01) [B08B 3/08 (2013.01)] 28 Claims
 
1. A single-phase paint remover composition comprising:
(a) from 15 wt % to 49.5 wt % tetrahydrofuran (THF), based on the total weight of the composition;
(b) from 1 wt % to 15 wt % a low vapor pressure (LVP) coupling co-solvent based on the total weight of the composition, the LVP coupling co-solvent comprising an alkanediol;
(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.