Abstract: The invention relates to a co-initiator comprising the aminobenzoate derivative according to Formula (I) and at least one ancillary amine, wherein the reactivity and solubility of said co-imitator in UV-curable resins is sufficiently high that the co-initiator can be used in UV radiation curing processes. Formula (I) wherein R1 and R2 independently represent methyl or ethyl groups; and j, k, l and m are independently 0 to 20.

Abstract: Acrylamide photoinitiators are provided, in which a photoinitiator moiety and an acrylamide are incorporated into the photoinitiator structure.

Abstract: Polymers are provided, in which a pendant photoinitiator moiety is linked to the polymer structure via an amide or a succinimide.

Abstract: Acrylamide photoinitiators are provided, in which a photoinitiator moiety and an acrylamide are incorporated into the photoinitiator structure.

Abstract: Acrylamide photoinitiators are provided, in which a photoinitiator moiety and an acrylamide are incorporated into the photoinitiator structure.

Abstract: Polymers are provided, in which a pendant photoinitiator moiety is linked to the polymer structure via an amide or a succinimide.

Abstract: A photoinitiator is provided which incorporates a camphorquinone photoinitiator moiety.

Abstract: Acrylamide photoinitiators are provided, in which a photoinitiator moiety and an acrylamide are incorporated into the photoinitiator structure.

Abstract: A photoinitiator is provided which incorporates a camphorquinone photoinitiator moiety.

Abstract: The present invention provides polymeric quaternary ammonium photoinitiators being co-polymers of photoinitiator monomers, as well as quaternary ammonium photoinitiator monomer being valuable intermediates in the preparation of such polymeric photoinitiators. Additionally, there is provided a polyacrylate obtained by radical polymerization of at least one acrylate monomer (Ac) in the presence of such polymeric photoinitiators. In the photoinitiator monomers and polymeric photoinitiators, a photoinitiator moiety and a quaternary ammonium are incorporated into the photoinitiator structure.

Abstract: The invention relates to a polymer (P) comprising at least one photoinitiator moiety (PI) and at least one dye moiety (DYE), wherein said at least one photoinitiator moiety (PI) and at least one dye moiety (DYE) are covalently linked to said polymer (P). Additionally, the invention relates to said polymer (P) being end-functionalized with optionally substituted acryloyi groups. The fact that both of these moieties are tightly bonded within the polymer, and the cross-linked polymer, means that the opportunities for leaching/migration of these components is reduced or even eliminated. Inks comprising at least one of said polymers are also provided. Methods for the manufacture of the polymers, and for printing are provided.

Abstract: The present invention provides novel photoinitiators for polyurethane formation, in which a photoinitiator moiety and a tertiary amine are incorporated into the photoinitiator structure, and thus the polyurethane polymer.

Abstract: A polymeric photoinitiator, most suitably a polyurethane photoinitiator, is obtained by step-growth co-polymerization of at least one monomer (A) with at least one monomer (B). Monomer (A) includes a photoinitiator moiety, while monomer (B) is a monomer reactive with monomer (A) to form a polymer. A method produces the polymeric photoinitiator, a method cross-links the polymeric photoinitiator, and the polymeric photoinitiator is used as a photoinitiator of radical polymerization.

Abstract: The present invention provides polymeric photoinitiators being co-polymers of photoinitiator monomers and at least one further monomer, as well as the photoinitiator monomers being intermediates in the preparation of such polymeric photoinitiators. Additionally there is provided polyacrylate obtained by radical polymerization of at least one acrylate monomer (Ac) in the presence of such polymeric photoinitiators. In the photoinitiator monomers and polymeric photoinitiators, a photoinitiator moiety and a tertiary amine are incorporated into the photoinitiator structure.

Abstract: A process for photopolymerizing a photopolymerizable compound having at least one ethylenically unsaturated double bond, comprises contacting said photopolymerizable compound with a photoactive oxide and irradiating it, wherein the photoactive oxide includes one or more moieties together with a moiety wherein there are at least 2 atoms between moiety I and moiety II in the additive and where X represents an oxygen or sulphur atom. Novel compounds which exhibit beneficial effects on cure in the presence of oxygen, which may be especially advantageous when LEDs are used, are also described.

Abstract: The present invention provides polymeric photoinitiators being co-polymers of photoinitiator monomers and at least one further monomer, as well as photoinitiator monomers being intermediates in the preparation of such polymeric photoinitiators. Additionally, there is provided polyacrylate obtained by radical polymerization of at least one acrylate monomer (Ac) in the presence of such polymeric photoinitiators. In the photoinitiator monomers and polymeric photoinitiators, a photoinitiator moiety, a hydrolytic stable linker and two polymerizable functional groups are incorporated into the photoinitiator structure.

Abstract: The present invention provides novel photoinitiators for polyurethane formation, in which a photoinitiator moiety and a tertiary amine are incorporated into the photoinitiator structure, and thus the polyurethane polymer.

Abstract: The present invention provides novel photoinitiators for polyurethane formation, in which a photoinitiator moiety and a tertiary amine are incorporated into the photoinitiator structure, and thus the polyurethane polymer.

Abstract: A process for photopolymerising a photopolymerisable compound having at least one ethylenically unsaturated double bond, comprises contacting said photopolymerisable compound with a photoactive oxide and irradiating it, wherein the photoactive oxide includes one or more moieties together with a moiety wherein there are at least 2 atoms between moiety I and moiety II in the additive and where X represents an oxygen or sulphur atom. Novel compounds which exhibit beneficial effects on cure in the presence of oxygen, which may be especially advantageous when LEDs are used, are also described.

Abstract: The present invention provides polymeric photoinitiators being co-polymers of photoinitiator monomers and at least one further monomer, as well as the photoinitiator monomers being intermediates in the preparation of such polymeric photoinitiators. Additionally there is provided polyacrylate obtained by radical polymerization of at least one acrylate monomer (Ac) in the presence of such polymeric photoinitiators. In the photoinitiator monomers and polymeric photoinitiators, a photoinitiator moiety and a tertiary amine are incorporated into the photoinitiator structure.