Abstract: The present invention relates to a pre-accelerated resin composition, characterized in that the resin composition comprises an unsaturated polyester resin and/or a vinyl ester resin, a soluble copper compound and a heterocyclic aromatic amine and which resin composition is essentially free of cobalt. The present invention further relates to a two component composition in which the first component comprises such a resin composition and in which the second component comprises an organic peroxide.

Abstract: The present invention relates to a pre-accelerated resin composition, characterized in that the resin composition comprises an unsaturated polyester resin and/or a vinyl ester resin, a soluble copper compound and a heterocyclic aromatic amine and which resin composition is essentially free of cobalt. The present invention further relates to a two component composition in which the first component comprises such a resin composition and in which the second component comprises an organic peroxide.

Abstract: The present invention relates to a two-component composition comprising a first component and a second component, wherein the first component being a pre-accelerated resin composition comprising an unsaturated polyester resin or vinyl ester resin and a copper2+ compound, at least one N-containing organic base selected from an amine compound and/or an ammonium salt; and wherein copper is present in an amount of at least 50 ppm (relative to the primary resin system), wherein the resin composition contains less than 0.01 mmol cobalt per kg primary resin system, the resin composition has an acid value in the range of from 0.001-300 mg KOH/g of resin composition, the molecular weight of the resin containing reactive unsaturations is in the range of from 500 to 200,000 g/mole and wherein the second component comprises a peroxide compound.

Abstract: The present invention also relates to a vinyl ester resin composition, wherein the vinyl ester resin composition comprises a vinyl ester resin and a manganese compound, a 1,3-dioxo compound, a base; and the resin being curable with a peroxide. The present invention also relates to a process for radically curing such a resin composition wherein a peroxide is added to the resin composition and the curing is effected essentially free of cobalt.

Abstract: The present invention relates to an unsaturated polyester resin or vinyl ester resin composition, wherein the unsaturated polyester resin or vinyl ester resin composition comprises an unsaturated polyester resin or vinyl ester resin and a copper compound and an acetoacetamide compound having the following formula: whereby R1, R2, R3, R4 and R5 each individually may represent hydrogen (H), or a C1-C20 alkyl, C6-C20 aryl, alkylaryl or arylalkyl group, that each optionally may contain one or more hetero-atoms (e.g. oxygen, phosphor, nitrogen or sulphur atoms) and/or substituents; a ring may be present between R1 and R2, R2 and R3, R3 and R5 and/or between R4 and R5; R4 and R5 may be part of a polymer chain or may be attached to a polymer chain; and the resin being curable with a peroxide and the resin composition contains less than 0.01 mmol cobalt per kg primary resin system and less than 0.01 mmol titanium per kg primary resin system.

Abstract: The present invention relates to a two-component composition comprising a first component and a second component, wherein the first component being a pre-accelerated resin composition comprising an unsaturated polyester resin or vinyl ester resin and a copper2+ compound, at least one N-containing organic base selected from an amine compound and/or an ammonium salt; and wherein copper is present in an amount of at least 50 ppm (relative to the primary resin system), wherein the resin composition contains less than 0.01 mmol cobalt per kg primary resin system, the resin composition has an acid value in the range of from 0.001-300 mg KOH/g of resin composition, the molecular weight of the resin containing reactive unsaturations is in the range of from 500 to 200,000 g/mole and wherein the second component comprises a peroxide compound.

Abstract: The present invention relates to a pre-accelerated resin composition, characterized in that the resin composition comprises an unsaturated polyester resin and/or a vinyl ester resin, a soluble copper compound and a heterocyclic aromatic amine and which resin composition is essentially free of cobalt. The present invention further relates to a two component composition in which the first component comprises such a resin composition and in which the second component comprises an organic peroxide.

Abstract: The present invention relates to unsaturated polyester resin composition comprising an unsaturated polyester resin, a manganese compound, a 1,3-dioxo compound and a base; the molar ratio between the dioxo compound and the basic functionality of the base is from 170:1 to 1:30 and the resin composition being curable with a peroxide. The present invention further relates to a process for radically curing such a resin composition wherein a peroxide is added to the resin composition and the curing is effected in the absence of cobalt.

Abstract: The present invention relates to a pre-accelerated resin composition comprising an unsaturated polyester resin and/or a vinyl ester resin, wherein the composition further comprises a. a copper salt, and b. a compound according to formula (1) in which R can be selected from H, optionally substituted C1-C20 alkyl, optionally substituted C6-C20 aryl, and wherein the copper is present in an amount of more than 0.1 mmol/kg resin.

Abstract: The present invention relates to a method for radically curing an unsaturated polyester resin or vinyl ester resin composition, wherein the resin composition contains at least 10 ppm radical inhibitor; the resin composition has an acid value of from 0.001 to 300 mg KOH/g resin composition and the curing is effected in the presence of at least 5 mmol Mn/kg primary resin system and at least 10 mmol of thiol/kg primary resin system. The invention also relates to cured objects or structural parts obtained from a resin composition obtained by such a process.

Abstract: The present invention relates to a two-component composition comprising a first component and a second component, wherein the first component being a non-aqueous resin composition comprising an unsaturated polyester resin or vinyl ester resin, a transition metal compound selected from a copper, iron, manganese or titanium compound, a potassium compound, and the resin composition contains less than 0.01 mmol cobalt per kg primary resin system and less than 0.01 mmol vanadium per kg primary resin system; and the second component comprises a peroxide compound.

Abstract: The present invention relates to a pre-accelerated resin composition, characterized in that the resin composition comprises an unsaturated polyester resin and/or a vinyl ester resin, a soluble copper compound and a heterocyclic aromatic amine and which resin composition is essentially free of cobalt. The present invention further relates to a two component composition in which the first component comprises such a resin composition and in which the second component comprises an organic peroxide.

Abstract: Two-component composition comprising a first component and a second component, wherein the first component being a resin composition comprising an unsaturated polyester resin or vinyl ester resin, a manganese compound and a thiol-containing compound; the molar ratio between the manganese and the thiol groups of the thiol-containing compound is from 4:1 to 1:1500; and the second component comprises a peroxide compound having formula ROOH, in which R is hydrogen or an optionally substituted alkyl group.

Abstract: The present invention relates to unsaturated polyester resin composition comprising an unsaturated polyester resin, a manganese compound, a 1,3-dioxo compound and a base; the molar ratio between the dioxo compound and the basic functionality of the base is from 170:1 to 1:30 and the resin composition being curable with a peroxide. The present invention further relates to a process for radically curing such a resin composition wherein a peroxide is added to the resin composition and the curing is effected in the absence of cobalt.

Abstract: The present invention relates to a two-component composition comprising a first component and a second component, wherein the first component being a non-aqueous resin composition comprising an unsaturated polyester resin or vinyl ester resin, a transition metal compound selected from a copper, iron, manganese or titanium compound, a potassium compound, and the resin composition contains less than 0.01 mmol cobalt per kg primary resin system and less than 0.01 mmol vanadium per kg primary resin system; and the second component comprises a peroxide compound.

Abstract: The present invention relates to a two-component composition comprising a first component and a second component, wherein the first component being a pre-accelerated resin composition comprising an unsaturated polyester resin or vinyl ester resin and a copper2+ compound, at least one N-containing organic base selected from an amine compound and/or an ammonium salt; and wherein copper is present in an amount of at least 50 ppm (relative to the primary resin system), wherein the resin composition contains less than 0.01 mmol cobalt per kg primary resin system, the resin composition has an acid value in the range of from 0.001-300 mg KOH/g of resin composition, the molecular weight of the resin containing reactive unsaturations is in the range of from 500 to 200.000 g/mole and wherein the second component comprises a peroxide compound.

Abstract: The present invention also relates to a vinyl ester resin composition, wherein the vinyl ester resin composition comprises a vinyl ester resin and a manganese compound, a 1,3-dioxo compound, a base; and the resin being curable with a peroxide. The present invention also relates to a process for radically curing such a resin composition wherein a peroxide is added to the resin composition and the curing is effected essentially free of cobalt.

Abstract: The present invention relates to a method for radically curing an unsaturated polyester resin or vinyl ester resin composition, wherein the resin composition contains at least 10 ppm radical inhibitor; the resin composition has an acid value of from 0.001 to 300 mg KOH/g resin composition and the curing is effected in the presence of at least 5 mmol Mn/kg primary resin system and at least 10 mmol of thiol/kg primary resin system. The invention also relates to cured objects or structural parts obtained from a resin composition obtained by such a process.