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Polymeric systems bearing side‐chain 2,6‐dimethylbenzoyldiphenylphosphinoxide moieties for UV curable coatings: Synthesis and photoinitiation activity
Author(s) -
Angiolini Luigi,
Caretti Daniele,
Carlini Carlo
Publication year - 1995
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1995.070570502
Subject(s) - moiety , thionyl chloride , polymer chemistry , acrylate , photoinitiator , copolymer , photopolymer , uv curing , side chain , materials science , curing (chemistry) , hydrolysis , acrylate polymer , acrylic acid , chemistry , chloride , polymer , polymerization , organic chemistry , composite material , monomer
Abstract Polymeric photoinitiators with pendant 2,6‐dimethylbenzoyldiphenylphosphinoxide moieties were prepared by reacting the hompolymer of 4‐acryloyloxy‐2,6‐dimethyl benzoic acid, and its copolymers with n ‐butyl acrylate with thionyl chloride followed by methoxydiphenylphosphine. These polymeric systems were characterized and their photoinitiation activity checked in the UV curing of a standard acrylic mixture, by irradiation both at 330 and over 380 nm, the latter conditions being applied to simulate a TiO 2 ‐pigmented coating formulation. The results were compared with those obtained by using the low molecular weight analog 2,4,6‐trimethylbenzoyldiphenylphosphinoxide and previously prepared polymeric systems based on the benzoyldiphenylphosphinoxide moiety. The stability to light and to hydrolytic conditions of the polymeric photoinitiators with respect to the model compound was also tested. The results obtained are discussed and related to the structural requirements of these systems. © 1995 John Wiley & Sons, Inc.