Quaternary ammonium hydroxides

摘要

A method of removing a residue from a surface, including applying to the surface a composition including (a) a quaternary ammonium hydroxide having a general formula (I):;
as defined herein, and
(b) a dipolar aprotic solvent substantially free of water; andremoving at least a substantial portion of the residue from the surface.

主权项

1. A method of removing a residue from a surface, comprising:
applying to the surface a composition comprising: (a) a quaternary ammonium hydroxide having a general formula (I): wherein in the general formula (I):
R1 may be C1-C18 linear or branched alkyl, C2-C18 linear or branched alkanol, C3-C18 linear or branched polyol, benzyl, or substituted benzyl, wherein when present, substituted benzyl is substituted with one or more of C1-C4 alkyl, C1-C4 alkoxy, or halogen, or R1 may have the following general formulae (i) or (ii): wherein in general formulae (i) and (ii), R6 is independently C1-C4 branched or unbranched alkyl;
R2 and R3 may be independently C1-C18 linear or branched alkyl, C2-C18 linear or branched alkanol, C3-C18 linear or branched polyol, benzyl, or substituted benzyl, wherein when present, substituted benzyl is substituted with one or more of C1-C4 alkyl, C1-C4 alkoxy, or halogen, orR1 is as defined above, and R2 and R3 may together form a heterocyclic ring containing the quaternary ammonium N atom of the general formula (I) and 4 to 7 carbon atoms, orR1 is as defined above, and R2 and R3 may together form a heterocyclic ring containing the quaternary ammonium nitrogen atom of the general formula (I), and either a second nitrogen atom or an oxygen atom and 3 to 6 carbon atoms, wherein the second nitrogen atom may be substituted with one or two groups independently selected from C1-C18 linear or branched alkyl, C2-C18 linear or branched alkanol, C3-C18 linear or branched polyol, benzyl, or substituted benzyl, wherein when present, substituted benzyl is substituted with one or more of C1-C4 alkyl, C1-C4 alkoxy, or halogen, orR1, R2, and R3 together may form a bicyclic structure containing from two to four carbon atoms between first and second bridgehead positions, wherein the quaternary N atom of the general formula (I) is at the first bridgehead position, and a carbon or a tertiary or quaternary nitrogen is at the second bridgehead position, wherein when the second bridgehead position is a carbon or a quaternary nitrogen, the carbon or quaternary nitrogen is substituted with R5, in which R5 is H or a C1-C4 branched or unbranched alkyl group, andR4 is C1-C18 linear or branched alkyl, phenyl or substituted phenyl, or benzyl or substituted benzyl, wherein when present, substituted phenyl or substituted benzyl is substituted with one or more of C1-C4 alkyl, C1-C4 alkoxy, or halogen; and (b) a dipolar aprotic solvent substantially free of water; and removing at least a substantial portion of the residue from the surface.