Abstract: An acrylated and/or methacrylated urethane oligomer obtained by reaction of a specific polyamine with a cyclic carbonate compound carrying m cyclic carbonate groups, giving an intermediate product carrying m formed urethane groups which carry residual reactive amine —NH— groups, and subsequently an addition reaction of each of the residual reactive amine groups of the intermediate product with an acrylate group of a compound carrying, in addition to the acrylate group, p additional acrylate and/or methacrylate groups, with each residual reactive amine —NH— group of the intermediate product being thus converted into a carbon-nitrogen bond carrying the acrylate and/or methacrylate groups, and thus production of the urethane oligomer, with the urethane oligomer carrying m urethane groups and m hydroxyl groups and having a functionality in acrylates and/or methacrylates ranging from m*p(n?1) to m*p(2n?2).

Abstract: The invention relates to a multifunctional acrylic product having a number-average functionality f of acrylate groups greater than 2.1, which is the product of reaction by esterification and by etherification, via Michael addition reaction, between a) a polyol or a mixture of polyols R(OH)m having a functionality m of at least 3 for a polyol alone or having an average functionality greater than 2.1 for a mixture of polyols, and b) the acrylic acid (R1OH) in the presence of c) at least one cyclic polycarboxylic anhydride or of its polyacid form having a carboxy functionality z of at least 2 and up to 4, the ratio r1 of number of carboxy groups of said anhydride or polyacid c) with respect to those of the acrylic acid b) r1=CO2Hc/CO2Hb being from 0.01 to 0.

Abstract: An acrylated oligomer, having a number-average acrylate functionality fo>2, of branched structure results from the polyaddition reaction of at least one amine A) having a functionality fA of N—H groups of at least 2, to at least one multifunctional acrylate B) having a functionality fB of acrylate groups of at least 2, with an average functionality per mole of all of the components A)+B) of greater than 2 and with the oligomer comprising in its repeating unit structure at least one —O2C—CH2—CH2—N? aminoacrylate group resulting from the polyaddition and with a content of nitrogen resulting from the amine A) of greater than or equal to 0.35 mEq/g and an initial ratio r=acrylate/N—H of between rinf and 1.1 rsup with rinf=0.90*(fA?1)*(fB?1) and rsup=2*fA+2*fB?6 and the average number nav of repeating units per oligomer nav=1/[(r*fA/fB)+1?fA].

Abstract: The invention relates to a multifunctional acrylic product having a number-average functionality f of acrylate groups greater than 2.1, which is the product of reaction by esterification and by etherification, via Michael addition reaction, between a) a polyol or a mixture of polyols R(OH)m having a functionality m of at least 3 for a polyol alone or having an average functionality greater than 2.1 for a mixture of polyols, and b) the acrylic acid (R1OH) in the presence of c) at least one cyclic polycarboxylic anhydride or of its polyacid form having a carboxy functionality z of at least 2 and up to 4, the ratio r1 of number of carboxy groups of said anhydride or polyacid c) with respect to those of the acrylic acid b) r1=CO2Hc/CO2Hb being from 0.01 to 0.

Abstract: The present invention relates to an acrylated and/or methacrylated urethane oligomer obtained by reaction of a specific polyamine a) with a cyclic carbonate compound b) carrying m cyclic carbonate groups, giving an intermediate product c) carrying m formed urethane groups which carry residual reactive amine —NH— groups, and subsequently an addition reaction of each of the said residual reactive amine groups of the said product c) with an acrylate group of a compound d) carrying, in addition to the said acrylate group, p additional acrylate and/or methacrylate groups, with each residual reactive amine —NH— group of the said product c) being thus converted into a carbon-nitrogen bond carrying the said acrylate and/or methacrylate groups, and thus production of the said urethane oligomer, with each carbon-nitrogen bond formed carrying p acrylate and/or methacrylate groups and the said urethane oligomer carrying m urethane groups and m hydroxyl groups in the alpha or beta position with respect to the said urethan

Abstract: The invention relates to an acrylated oligomer, having a number-average acrylate functionality fo>2, of branched structure resulting from the polyaddition reaction of at least one amine A) having a functionality fA of N—H groups of at least 2, to at least one multifunctional acrylate B) having a functionality fB of acrylate groups of at least 2, with an average functionality per mole of all of the components A)+B) of greater than 2 and with said oligomer comprising in its repeating unit structure at least one —O2C—CH2—CH2—N=aminoacrylate group resulting from said polyaddition and with a content of nitrogen resulting from said amine A) of greater than or equal to 0.35 mEq/g and an initial ratio r=acrylate/N—H of between nut and 1.1 rsup with ninf=0.90*(fA?1)*(fB?1) and rsup=2*fA+2*fB?6 and the average number nav of repeating units per oligomer nav=1/[(r*fA/fB)+1?fA].