Alkylphenyl derivatives and their use as photoinitiators

The present invention provides novel compounds tert-butylphenyl-2-methyl-2- (1-piperidinyl) -1-propanone, and tert-butyl phenyl-2-methyl-2- (1-morpholinyl yl) -1-propanone, their preparation and their use as photoinitiators. The present invention also discloses a compound comprising as a photoinitiator the photopolymerizable compositions and their use, and provides a coated substrate coated with the composition.