Abstract: An aminoacrylate-acrylate urethane comprises at least one urethane function bonded to an aminoacrylate group, this group having a plurality of acrylate groups and being derived from the reaction of a) a hydroxylated aminoacrylate bearing one or more acrylate groups with b) a polyisocyanate. The aminoacrylate a) is produced by the addition of a1) an amino alcohol bearing a hydroxyl group and a secondary amine group to a2) at least one multifunctional acrylate, with a2) being in stoichiometric excess relative to the secondary amine groups of said amino alcohol a1). A method for preparing the urethane acrylate comprises preparing the aminoacrylate a) by a Michael addition reaction. The aminoacrylate-acrylate urethane may be used in curable compositions, more particularly as a synergist, and also to cured finished products from the urethane acrylate.

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: Provided is a polymerizable composition including a mixture of at least one monomer which is capable of undergoing radical polymerization and which bears at least one polymerizable function, of at least one flexible dormant polymer block capable of generating at least one radical, and at least one free-radical generator derived from the decomposition of a photoinitiator. The composition may be used as a component of an adhesive, coextrusion binder, varnish, coating, resin for impregnating fabrics or woven materials, a composition suitable for printing on a flexible support or a composition suitable for 3D printing, for example.

Abstract: The invention relates to a photopolymerizable composition based on a (meth)acrylic matrix, mainly characterized in that it further comprises a (meth)acrylic block copolymer, or a blend of (meth)acrylic black copolymers, dissolved in said (meth)acrylic matrix and one or more photoinitiators.

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: An aminoacrylate-acrylate urethane comprises at least one urethane function bonded to an aminoacrylate group, this group having a plurality of acrylate groups and being derived from the reaction of a) a hydroxylated aminoacrylate bearing one or more acrylate groups with b) a polyisocyanate. The aminoacrylate a) is produced by the addition of a1) an amino alcohol bearing a hydroxyl group and a secondary amine group to a2) at least one multifunctional acrylate, with a2) being in stoichiometric excess relative to the secondary amine groups of said amino alcohol a1). A method for preparing the urethane acrylate comprises preparing the aminoacrylate a) by a Michael addition reaction. The aminoacrylate-acrylate urethane may be used in curable compositions, more particularly as a synergist, and also to cured finished products from the urethane acrylate.

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: A urethane (meth)acrylate not comprising caprolactone is the product of reaction of A) a monoalcohol bearing from 1 to 5 (meth)acrylates, B) an allophanate-modified polyisocyanate, C) optionally, in the presence of a saturated polyol of functionality 2 to 3, D) optionally, in the presence of an unsaturated polyol with a hydroxyl functionality of 2 to 4, said polyol being C3 to C18, E) optionally, in the presence of a reactive diluent. A process for preparing the urethane (meth)acrylate includes reacting the monoalcohol A) and the polyisocyanate B) in the optional presence of C), D), and/or E). The urethane (meth)acrylate may be used in curable compositions for coatings, in particular for varnishes and inks, adhesives, adhesion primers, coatings for wood, metal or plastic and application by spray gun and provide a good compromise between reactivity, flexibility, adherence, hardness, and ease of use.

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].

Abstract: The invention relates to a urethane (meth)acrylate not comprising caprolactone, which is the product of reaction of A) a monoalcohol bearing from 1 to 5 (meth)acrylates, B) an allophanate-modified polyisocyanate, C) optionally, in the presence of a saturated polyol of functionality 2 to 3, D) optionally, in the presence of an unsaturated polyol with a hydroxyl functionality of 2 to 4, said polyol being C3 to C18, E) optionally, in the presence of a reactive diluent. The invention also relates to a process for preparing said urethane (meth)acrylate, and also to its use in curable compositions for coatings, in particular for varnishes and inks, adhesives, adhesion primers, coatings for wood, metal or plastic and application by spray gun in particular. These coatings have a good compromise between reactivity, flexibility, adherence and hardness, while at the same time being easy to apply.