Abstract: A polyalkylether photoinitiator of the general formula I, R1(A1)r-(R2(A2)m-O)o—(R3(A3)n-O)p—R4(A4)s I, wherein R1, R2, R3, R4 and m, n, o, p, r and s are as defined herein and A1, A2, A3 and A4 are identical or different photoinitiator moieties.

Abstract: The invention provides a method for the manufacture of a gel, said method comprising the steps of: providing a matrix composition comprising a polymeric photoinitiator of the general formula (I): Polymer-[CR2—CHR-Spacer(PI)n]m (I) curing the matrix composition by exposing it to UV radiation and exposing the matrix composition to a swelling medium. The invention also relates to gels obtainable via the above method. The invention provides a hydrophilic gel precursor manufactured from the polymeric photoinitiator of Formula (I). Medical devices comprising the gels and hydrophilic gel precursors of the invention are provided. The invention also provides the use of a polymeric photoinitiator in the manufacture of a gel.

Abstract: A polyacrylate is obtained by radical polymerization of at least one acrylate monomer (Ac) in the presence of a polymeric photoinitiator. The polymeric photoinitiator is a co-polymer of at least one photoinitiator monomer (A) with at least one monomer (B), and optional additional monomers (C). Rapid polymerization of the acrylate monomer is provided. A method produces a polyacrylate using the polymeric photoinitiator as described, and a polymeric photoinitiator is used as the photoinitiator of radical polymerization of acrylate monomers.

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 invention provides a method for producing a polymeric photoinitiator of the general formula I: Polymer-[CR2-CHR-Spacer (PI)n]m, (I) wherein m is an integer from 1-5000; n is a real number above 0 and below 5; each R group, independently, is a substituent independently selected from hydrogen, C1-C25 linear alkyl, C3-C25 branched alkyl, C3-C25 cycloalkyl, aryl, heteroaryl, —OH, —CN, halogens and amines and PI is a photoinitiator moiety. The method comprises grafting one or more photoinitiator moieties (PI), each of which comprises at least one activated alkene functional group, onto the polymer. Polymeric photoinitiators are also 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 invention provides a method for the manufacture of a gel, said method comprising the steps of: providing a matrix composition comprising a polymeric photoinitiator of the general formula (I): Polymer-[CR2—CHR-Spacer(PI)n]m (I) curing the matrix composition by exposing it to UV radiation and exposing the matrix composition to a swelling medium. The invention also relates to gels obtainable via the above method. The invention provides a hydrophilic gel precursor manufactured from the polymeric photoinitiator of Formula (I). Medical devices comprising the gels and hydrophilic gel precursors of the invention are provided. The invention also provides the use of a polymeric photoinitiator in the manufacture of a gel.

Abstract: The invention provides a method for the manufacture of a gel, said method comprising the steps of: providing a matrix composition comprising a polymeric photoinitiator of the general formula (I): Polymer-[CR2—CHR-Spacer(PI)n]m (I) curing the matrix composition by exposing it to UV radiation and exposing the matrix composition to a swelling medium. The invention also relates to gels obtainable via the above method. The invention provides a hydrophilic gel precursor manufactured from the polymeric photoinitiator of Formula (I). Medical devices comprising the gels and hydrophilic gel precursors of the invention are provided. The invention also provides the use of a polymeric photoinitiator in the manufacture of a gel.

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 polyalkylether photoinitiator of the general formula I, R1(A1)r-(R2(A2)m-O)o-(R3(A3)n-O)p—R4(A4)s I, wherein R1, R2, R3, R4 and m, n, o, p, r and s are as defined herein and A1, A2, A3 and A4 are identical or different photoinitiator moieties.

Abstract: The invention provides a method for the manufacture of a catheter comprising a hydrophilic gel. The method comprising the steps of combining a polymeric photoinitiator of the general formula (I): R1(A1)r-(R2(A2)m-O)o—(R3(A3)n-O)p—R4(A4)s??(I) with one or more gel-forming polymers and/or gel-forming monomers to form a matrix composition, curing the matrix composition by exposing it to UV radiation, exposing the matrix composition to a swelling medium and incorporating the hydrophilic gel into a catheter.

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 polyalkylether photoinitiator of the general formula I, R1(A1)r-(R2(A2)m-O)o—(R3(A3)n-O)p—R4(A4)s I wherein R1, R2, R3, R4 and m, n, o, p, r and s are as defined herein and A1, A2, A3 and A4 are identical or different photoinitiator moieties.

Abstract: The present invention relates to the use of polymeric photoinitiators based on polyalkyletherurethane backbones in the production of hydrophilic gels, in particular hydrogels. The invention relates to methods for manufacturing hydrophilic gels using said polymeric photoinitiators, and the hydrophilic gels thus obtained.

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: Novel photoinitiators provide 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 invention provides a method for the manufacture of a catheter comprising a hydrophilic gel. The method comprising the steps of combining a polymeric photoinitiator of the general formula (I): R1(A1)r-(R2(A2)m-O)o—(R3(A3)n-O)p—R4(A4)s??(I) with one or more gel-forming polymers and/or gel-forming monomers to form a matrix composition, curing the matrix composition by exposing it to UV radiation, exposing the matrix composition to a swelling medium and incorporating the hydrophilic gel into a catheter.

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 invention provides a method for the manufacture of a catheter comprising a hydrophilic gel. The method comprising the steps of combining a polymeric photoinitiator of the general formula (I): R1(A1)r-(R2(A2)m-O)o—(R3(A3)n-O)p—R4(A4)s??(I) with one or more gel-forming polymers and/or gel-forming monomers to form a matrix composition, curing the matrix composition by exposing it to UV radiation, exposing the matrix composition to a swelling medium and incorporating the hydrophilic gel into a catheter. The invention also provides autocuring of the polymeric photoinitiator (I) to provide a gel precursor, a hydrophilic gel and a catheter comprising or coated with the hydrophilic gel of the invention.