Abstract: An air drying auto-oxidizable resin composition comprising components: a) a drier comprising a manganese salt complex, and b) a polymer comprising unsaturated fatty acid residues, wherein the manganese salt complex has the following structure I: wherein the anion is selected from Cl?, NO3? or R2COO?, in which case n=2; or the anion is SO42?, in which case n=1; wherein X,Y,Z are independently selected from O, OH, OH2, OC(R3)O, and R4BO2 and wherein a and b are independently an integer of value 2, 3 or 4; R1?H, C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms; R2=C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms, or a polymeric residue; and R3=C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms, or a polymeric residue. R4?C1-C20 alkyl optionally substituted with heteroatoms, or C6-C20 aryl optionally substituted with heteroatoms.

Abstract: An air drying auto-oxidizable resin composition comprising components: a) a drier comprising a manganese carboxylate complex, and b) a polymer comprising unsaturated fatty acid residues, wherein the manganese carboxylate complex a) has the following structure I: wherein R1?H, C1-C20 alkyl optionally substituted with heteroatoms, or C6-C20 aryl optionally substituted with heteroatoms; X and Y are independently selected from O and OC(R3)O, in which a=4 when X?O, and a=3 when X?OC(R3)O, and in which b=4 when Y?O, and b=3 when Y?OC(R3)O; R2=C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms, or a polymeric residue; and R3?C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms, or a polymeric residue.

Abstract: Use of a transition metal complex a) as a drier for air drying auto-oxidative resin composition comprising a polymer b) comprising unsaturated fatty acid residues, wherein the transition metal complex a) has a cation of the following structure (I) wherein R?C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms, or a polymeric residue; R1?H, C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms; X?O, OC(R2)O in which a=4 when X?O, and a=3 when X?OC(R2)O, R2?C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms, or a polymeric residue.

Abstract: Use of a transition metal complex a) as a drier for air drying auto-oxidative resin composition comprising a polymer b) comprising unsaturated fatty acid residues, wherein the transition metal complex a) has a cation of the following structure (I) wherein R=C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms, or a polymeric residue; R1=H, C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms; X=O, OC(R2)O in which a=4 when X=O, and a=3 when X=OC(R2)O, R2=C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms, or a polymeric residue.

Abstract: An air drying auto-oxidisable resin composition comprising components: a) a drier comprising a manganese carboxylate complex, and b) a polymer comprising unsaturated fatty acid residues, wherein the manganese carboxylate complex a) has the following structure I: wherein R1?H, C1-C20 alkyl optionally substituted with heteroatoms, or C6-C20 aryl optionally substituted with heteroatoms; X and Y are independently selected from O and OC(R3)O, in which a=4 when X?O, and a=3 when X?OC(R3)O, and in which b=4 when Y?O, and b=3 when Y?OC(R3)O; R2=C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms, or a polymeric residue; and R3?C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms, or a polymeric residue.

Abstract: An air drying auto-oxidisable resin composition comprising components: a) a drier comprising a manganese salt complex, and b) a polymer comprising unsaturated fatty acid residues, wherein the manganese salt complex has the following structure I: wherein the anion is selected from Cl?, NO3? or R2COO?, in which case n=2; or the anion is SO42?, in which case n=1; wherein X,Y,Z are independently selected from O, OH, OH2, OC(R3)O, and R4BO2 and wherein a and b are independently an integer of value 2, 3 or 4; R1?H, C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms; R2=C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms, or a polymeric residue; and R3=C1-C20 alkyl optionally substituted with heteroatoms, C6-C20 aryl optionally substituted with heteroatoms, or a polymeric residue. R4?C1-C20 alkyl optionally substituted with heteroatoms, or C6-C20 aryl optionally substituted with heteroatoms.

Abstract: The present invention relates to unsaturated polyester resin or vinyl ester resin compositions that are essentially free of cobalt; that are curable with a peroxide component; and that, comprise a polymer containing reactive unsaturations, optionally a reactive diluent, and a dioxo component; which dioxo component consists of one or more dioxo-compounds having a calculated reduction energy (CRE), being the energy difference in kcal/mole between the lowest energy conformations of the radical anion and the corresponding neutral molecule as calculated by means of the Turbomole Version 5 program, in the range of from ?5 to ?30 kcal/mole. These resin compositions show a reduced gel-time drift tendency. The present invention further also relates to objects and structural parts prepared from such unsaturated polyester or vinyl ester resin compositions by curing with a peroxide. The present invention finally also relates to methods of peroxide curing of unsaturated polyester resin or vinyl ester resin compositions.