Composition

A composition comprising:

• (a) one or more monomers of formula (I);
• (b) a latent organo-transition metal catalyst comprising a metal selected from the group consisting of ruthenium, osmium or palladium;
• (c) a compound capable of releasing a Bronsted acid when subjected to photolytic conditions;
• and (d) an absorber compound having a maximum absorption wavelength between 280-410 nm;
• wherein the formula (I) is represented by below formula;
• m is an integer 0, 1 or 2;
• R1, R2, R3 and R4 are each independently selected from the group consisting of hydrogen, halogen, methyl, ethyl, linear or branched C1-20 alkyl, perfluoro C1-12 alkyl, hydroxy C1-16 alkyl, C3-12 cycloalkyl, C6-12 bicycloalkyl, (CH2)a—C6-12 bicycloalkenyl, C7-14 tricycloalkyl, substituted or unsubstituted C6-10 aryl, substituted or unsubstituted C6-10 aryl C1-6 alkyl, perfluoro C6-10 aryl, perfluoro C6-10 aryl C1-3 alkyl and a group of formula (A):
• —Z-Aryl (A),
• wherein:
• Z is a single bond or a group selected from the group consisting of:
• (CR5R6)a, O(CR5R6)a, (CR5R6)aO, (CR5R6)a—O—(CR5R6)b, (CR5R6)a—O—(SiR5R6)b, (CR5R6)a—(CO)O—(CR5R6)b, where a and b are integers each independently is 1 to 12;
• R5 and R6 are each independently selected from the group consisting of hydrogen, methyl, ethyl, linear or branched C3-6 alkyl, hydroxy, methoxy, ethoxy, linear or branched C3-6 alkyloxy, acetoxy, C2-6 acyl, hydroxymethyl, hydroxyethyl, linear or branched hydroxy C3-6 alkyl, substituted or unsubstituted phenyl and substituted or unsubstituted phenoxy;
• Aryl is phenyl or phenyl substituted with one or more of groups selected from the group consisting of methyl, ethyl, linear or branched C3-6 alkyl, hydroxy, methoxy, ethoxy, linear or branched C3-6 alkyloxy, acetoxy, C2-6 acyl, hydroxymethyl, hydroxyethyl, linear or branched hydroxy C3-6 alkyl, phenyl and phenoxy;
• and
• optionally one of R1 or R2 taken together with one of R3 or R4 and the carbon atoms to which they are attached to form a C5-7 carbocyclic ring optionally containing one or more double bonds.