Copolymerizable benzophenone photoinitiators
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United States of America Patent
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May 4, 1999
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N/A
app pub date -
Dec 23, 1996
filing date -
Dec 23, 1996
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Expired
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Abstract
Copolymerizable benzophenone photoinitiators of the formula I ##STR1## wherein 1, k=0, 1, 2. R.sub.1 =divalent organic group having 1 to 25 carbon atoms; R.sub.2 =H or methyl; and R.sub.3, R.sub.4 =organic group having 1 to 25 carbon atoms. X, Y=hydrogen, halogen or (C.sub.1 -C.sub.25) groups containing N, S, and/or O; and method of making the photoinitiators. The photoinitiators overcome the leaching problem with prior photoinitiators in radiation curable polymer applications. Radiation curable polymers, cured polymers, and coated articles are also disclosed.
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