Patent ID: 8664287

Claim:
A method for photocuring comprising: providing a photocurable composition comprising at least one N-oxyazinium salt photoinitiator, and at least one organic phosphine as an N-oxyazinium salt efficiency amplifier, and at least one photocurable compound, and irradiating the photocurable composition, wherein the organic phosphine is represented by the following Structure (I) or (II): (R′) 3 P (I) (R′) 2 P-L-P(R′) 2 (II) wherein the multiple R′ groups are: (1) hydrogen, (2) the same or different substituted or unsubstituted alkyl groups, (3) the same or different substituted or unsubstituted cycloalkyl groups, (4) the same or different substituted or unsubstituted aryl groups, (5) the same or different HO[{CH(R)} x ] y groups wherein the multiple R groups are the same or different and can be hydrogen atoms or substituted or unsubstituted alkyl or cycloalkyl groups, or two R′ groups together can form a cyclic aliphatic ring or fused ring system, x is an integer of at least 2 and up to and including 20, and y is an integer of at least 1 and up to and including 20, or (6) two adjacent R′ groups are joined together to form a cyclic ring with the phosphorus atom, provided at least one R′ group is not hydrogen, and L is a connecting group having at least 1 to 12 carbon atoms in the linking chain.