A crosslinkable composition crosslinkable by Real Michael Addition reaction comprising a. Component(s) A having at least 2 acidic C-H donor groups in activated methylene or methine and having a pKa between 10.5 and 14, b. Component(s) B having at least 2 activated unsaturated acceptor groups, wherein a molar ratio R of acceptor groups to donor groups is between 3:1 to 1:6 and which component(s) B react with component(s) A by Real Michael Addition to form a crosslinked network, c. basic component(s) C being a salt of a basic anion X- from an acidic X-H group containing compound wherein X is N, P, O, S or C, i. in an amount xc between 0.001 and 1 meq/(gr of components A, B, C, D), ii. anion X- being a Michael Addition donor reactable with component B and iii. anion X- is characterized by a pKa of the corresponding acid X-H of more than two units lower than the pKa of the majority component A and being lower than 10.5, d. optional component(s) D comprising one or more acidic X'-H groups wherein X' is N, P, O, S or C, i. X' being a same or different group as group X in component C, ii. the X'- anion being a Michael Addition donor reactable with component B, iii. the pKa of the X'-H group in component D being more than two units lower than pKa of the majority component A and being lower than 10.5, iv. the equivalent ratio Rd/c of acidic X'-H groups in component D over basic anion X- in component C is between 1 and 5000%, e. not including a composition comprising an ethylmalonate modified polyester based on neopentyl glycol and hexahydrophthalic anhydride, di-trimethylolpropane-tetraacrylate and tetrabutylammonium succinimide and ethylacetoacetate. a. Component(s) A having at least 2 acidic C-H donor groups in activated methylene or methine and having a pKa between 10.5 and 14, b. Component(s) B having at least 2 activated unsaturated acceptor groups, wherein a molar ratio R of acceptor groups to donor groups is between 3:1 to 1:6 and which component(s) B react with component(s) A by Real Michael Addition to form a crosslinked network, c. basic component(s) C being a salt of a basic anion X- from an acidic X-H group containing compound wherein X is N, P, O, S or C, i. in an amount xc between 0.001 and 1 meq/(gr of components A, B, C, D), ii. anion X- being a Michael Addition donor reactable with component B and iii. anion X- is characterized by a pKa of the corresponding acid X-H of more than two units lower than the pKa of the majority component A and being lower than 10.5, i. in an amount xc between 0.001 and 1 meq/(gr of components A, B, C, D), ii. anion X- being a Michael Addition donor reactable with component B and iii. anion X- is characterized by a pKa of the corresponding acid X-H of more than two units lower than the pKa of the majority component A and being lower than 10.5, d. optional component(s) D comprising one or more acidic X'-H groups wherein X' is N, P, O, S or C, i. X' being a same or different group as group X in component C, ii. the X'- anion being a Michael Addition donor reactable with component B, iii. the pKa of the X'-H group in component D being more than two units lower than pKa of the majority component A and being lower than 10.5, iv. the equivalent ratio Rd/c of acidic X'-H groups in component D over basic anion X- in component C is between 1 and 5000%, i. X' being a same or different group as group X in component C, ii. the X'- anion being a Michael Addition donor reactable with component B, iii. the pKa of the X'-H group in component D being more than two units lower than pKa of the majority component A and being lower than 10.5, iv. the equivalent ratio Rd/c of acidic X'-H groups in component D over basic anion X- in component C is between 1 and 5000%, e. not including a composition comprising an ethylmalonate modified polyester based on neopentyl glycol and hexahydrophthalic anhydride, di-trimethylolpropane-tetraacrylate and tetrabutylammonium succinimide and ethylacetoacetate.