Drier for auto-oxidisable coating compositions

摘要

A mixture for use as a drier for air-drying an auto-oxidizable resin composition, said mixture comprising : 1,4,7-trialkyl-1,4,7-triazacyclononane (L); and, a manganese salt having the general formula Mn2+[X]n, wherein anion X is selected from PF6−, SbF6−, AsF6−, BF4−, B(C6F5)4−, CI−, Br−, I−, NO3−, or R2COO− in which case n=2, or the anion X is SO42− in which case n=1, and wherein R2 is C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms, or a polymeric residue; wherein the 1,4,7-trialkyl-1,4,7-triazacyclononane (L) is present in the mixture in an amount such that the molar ratio of L:Mn is at least 1.25:1 and more preferably at least 1.5:1.

主权项

1. An air-drying auto-oxidizable resin composition comprising:
a) a drier comprising:
i) a manganese salt comprising Mn2+ and anion X, wherein X has the formula R2COO—, wherein R2 is C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms, or a polymeric residue; andii) 1,4,7-trisubstituted-1,4,7-triazacyclononane (L) wherein said 1,4,7-trisubstituted-1,4,7-triazacyclononane (L) has the general structure wherein R1 is C1-C20 alkyl optionally substituted with heteroatoms, or C6-C20 aryl optionally substituted with heteroatoms;wherein the 1,4,7-trisubstituted-1,4,7-triazacyclononane (L) and manganese salt (Mn) are in a molar ratio of L:Mn of at least 1.25:1; and, b) a polymer comprising unsaturated aliphatic groups.