Abstract: The present application is directed to a copolymer obtained by free radical polymerization, said copolymer comprising, based on the total weight of monomers: from 0.1 to 10 wt. % of a) at least one co-polymerizable photoinitiator in accordance with Formula (I): wherein: R1 is NH, CH2, S or O; R2 to R9 are independently selected from H, OH, SH, halide, CN, C1-C6 alkyl, C1-C6 alkoxy, C1-C12 alkoxyalkyl, COOH, SR10, COOR10, N(R10)2 or N(R10)3Q; each R10 is independently selected from C1-C6 alkyl or C6-C18 aryl; and, Q is halide, acetate, phosphate, sulphate or nitrate, subject to the proviso that j of the radicals R2 to R9 are a radical possessing ethylenic unsaturation, wherein j is an integer of from 1 to 3, preferably 1 or 2; and, from 90 to 99.9 wt. % of b) at least one ethylenically unsaturated non-ionic monomer which does not bear an epoxide group or a moiety decomposable under photo-irradiation to form a radical.

Abstract: The present invention refers to a UV LED curable hotmelt pressure sensitive adhesive composition, a method for its production as well as an article comprising a first substrate and a second substrate adhered to each other with the adhesive composition according to the invention.

Abstract: The present application is directed to a copolymer obtained by free radical polymerization, said copolymer comprising, based on the total weight of monomers: from 0.01 to 10 wt. % of a) at least one co-polymerizable photoinitiator having an ethylenically unsaturated group and a moiety that is decomposable under photo-irradiation to form a radical; from 0.01 to 10 wt. % of b) at least one epoxy (meth)acrylate monomer having at least one (meth)acrylate group and at least one epoxide group; and, from 80 to 99.98 wt. % of c) at least one ethylenically unsaturated monomer which does not bear an epoxide group or a moiety decomposable under photo-irradiation to form a radical. The present application is further directed to a material which is crosslinkable under photoirradiation, said material comprising: a copolymer as defined above; and, at least one ionic photoacid generator (PAG).

Abstract: The present invention relates to an UV-curable pressure sensitive acrylic adhesive obtainable by reacting in a first step a mixture comprising: (i) at least one acrylic monomer of formula (I) wherein R1 is H or CH3; and wherein R2 and R3 are both H or both CH3; and n is an integer from 0 to 22; or mixtures thereof; and (ii) at least one monomer which comprises a pendant reactive functional group selected from cycloaliphatic epoxides, oxetanes, mono-substituted oxiranes or mixtures thereof; and in a second step reacting the obtained mixture from the first step with (iii) at least one cationic photoinitiator; and (iv) optionally further additives. An article comprising this adhesive, and a method of manufacturing the article.

Abstract: The present invention relates to an UV-curable pressure sensitive acrylic adhesive obtainable by reacting in a first step a mixture comprising: (i) at least one acrylic monomer of formula (I) wherein R1 is H or CH3; and wherein R2 and R3 are both H or both CH3; and n is an integer from 0 to 22; or mixtures thereof; and (ii) at least one monomer which comprises a pendant reactive functional group selected from cycloaliphatic epoxides, oxetanes, mono-substituted oxiranes or mixtures thereof; and in a second step reacting the obtained mixture from the first step with (iii) at least one cationic photoinitiator; and (iv) optionally further additives. An article comprising this adhesive, and a method of manufacturing the article.