123147-46-6Relevant academic research and scientific papers
Novel photoinitiator and preparation method thereof
-
, (2021/01/20)
The invention discloses a novel photoinitiator and a preparation method thereof. According to the photoinitiator, an annular 9,10-dihydro-9-oxa-10-phosphaphenanthrene structure (DOPO) is introduced onthe basis of a common acyl phosphine oxide initiator, so that the light absorption wavelength range of the initiator is further expanded to a visible light region, and the application of the photoinitiator in the visible light region is widened; and due to the newly introduced heterocyclic structure, the preparation raw materials of the new initiator can be from cheap flame retardants DOPO whichare commonly used for industrialization, and the dependence of the preparation method of the initiator with the traditional structure on the raw material diphenylphosphine chloride which is difficultto obtain is eliminated.
Novel 6-acyl-(6H)-dibenz[c,e][1,2]oxaphosphorin 6-oxides, their preparation and their use as photoinitiators
-
, (2008/06/13)
The invention relates 6-acyl-(6H)-dibenz[c,e][1,2]oxaphosphorin-6-oxides of the formula STR1 wherein each of R1, R2 and R3 may be present one or more times and R1, R2 and R3 represent halogen having an atomic number of from 9 to 35, alkyl or alkoxy each having from 1 to 6 carbon atoms and wherein Ar represents an aromatic hydrocarbon group having from 6 to 10 carbon atoms. The invention further relates to a process for the preparation of the afore-mentioned compounds and polymerizable compositions containing them as an essential ingredient as a photo-initiator. Finally the invention relates to 6-alkoxy-(6H)-dibenz[c,e][1,2]oxaphosphorin of the formula II STR2 wherein each of R1 and R2 may be present once or more times and R1 and R2 represent halogen having an atomic number of from 9 to 35, alkyl or alkoxy each having from 1 to 6 carbon atoms, at least one R1 being, however, halogen and wherein R4 represents alkyl having from 1 to 6 carbon atoms.
