US 11,655,314 B2
Photoinitiators for light-curable compositions
Robert Liska, Schleinbach (AT); Patrick Knaack, Vienna (AT); Paul Gauss, Vienna (AT); and Roland Taschner, Marz (AT)
Filed by Technische Universitaet Wien, Vienna (AT)
Filed on Apr. 13, 2022, as Appl. No. 17/719,757.
Application 17/719,757 is a continuation of application No. 16/633,385, granted, now 11,518,823, previously published as PCT/EP2018/070464, filed on Jul. 27, 2018.
Claims priority of application No. A 313/2017 (AT), filed on Jul. 27, 2017.
Prior Publication US 2022/0235153 A1, Jul. 28, 2022
Int. Cl. C08F 2/50 (2006.01); C08F 22/10 (2006.01); C07C 69/716 (2006.01); C07D 307/60 (2006.01); C08F 22/20 (2006.01); C08F 22/22 (2006.01); C08F 222/10 (2006.01)
CPC C08F 2/50 (2013.01) [C07C 69/716 (2013.01); C07D 307/60 (2013.01); C08F 22/1006 (2020.02); C08F 22/20 (2013.01); C08F 22/22 (2013.01); C08F 222/102 (2020.02)] 13 Claims
1. A photoinitiator or photosensitizer of the following formula (I) for use in a photopolymerizable composition:

OG Complex Work Unit Chemistry
R1 represents a monovalent, linear, branched or cyclic, aliphatic hydrocarbon group having 1 to 20 carbon atoms, which is optionally substituted with one or more substituents selected from —Cl, —Br, —OH, ═O, —NH—CO—OR2, —NH—CO—R2 or free-radically or ionically polymerizable groups, wherein each R2 radical is independently selected from —H or C1-6 alkyl;
wherein n is >1; Z represents —OR4—; Y represents —OR5—; X represents —H or —OH; and R4 and R5 each independently represent a bivalent hydrocarbon group for which otherwise the same options as mentioned for R1 apply;
wherein the polymerizable moieties as optional substituents of R1 are selected from polymerizable double or triple bonds as well as lactam, lactone and epoxide moieties, which are subjectable to ring-opening polymerization;
and wherein any two of R1 to R5 may be optionally linked to one another to form a ring or a dimer.