Photo-curable compositions containing high refractive index monomers for use in 3D printing applications

A photo-curable composition for use in a composition suitable for three-dimensional printing, the photo-curable composition comprising:

• a. a monomer composition comprising at least one monomer having a refractive index of at least 1.49, wherein the at least one monomer is selected from the group consisting of
• i. at least one monomer selected from the group consisting of poly(oxy-1,2-ethanediyl), alpha-(1-oxo-2-propen-1-yl)-omega-(4-(1-methyl-1-phenylethyl)phenoxy)-, N-vinyloxazole, and N-vinylcarbazole,
• ii. at least one monomer of Formula I
• wherein,
• Z is an ethylenically unsaturated group;
• X is O, S, or NH;
• L1 and L2 are each independently C1-C3 alkylene, —(C1-C3 alkylene)-S—(C1-C3 alkylene)-, or —(C1-C3 alkylene)-O—(C1-C3 alkylene)-;
• R is hydrogen or C1-C6 alkyl;
• R1 and R2 are each independently aryl, aryl (C1-C6 alkylene)-, heteroaryl, or heteroaryl (C1-C6 alkylene)-, each of which group is substituted with 0 to 5 substituents independently selected from halogen, C1-C4 alkyl, C1-C4 alkoxy, (C1-C4 alkyl)S—, C1-C4 haloalkyl, and C1-C4 haloalkoxy;
• and Y1 and Y2 are each independently O, S, NH, or N,
• iii. at least one monomer of Formula II
• wherein,
• A is H or CH3, and
• Q is selected from the group consisting of ethylene glycol phenyl ether, poly(ethylene glycol phenyl ether acrylate), phenyl, hexylphenoxy, hexylphenoxy, 2-phenylethyl, 4-methylphenyl, 4-methylbenzyl, 2-2-methyphenylethyl, 2-3-methylphenylethyl, 2-4-methylphenylethyl, 2-(4-propylphenyl) ethyl, 2-(4-(1-methylethyl)phenyl)ethyl, 2-(4-methoxyphenyl)ethyl, 2-(4-chlorophenyl) ethyl, 2-(2-chlorophenyl)ethyl, 2-(3-chlorophenyl)ethyl, 2-(4-chlorophenyl) ethyl, 2-(4-bromophenyl)ethyl, 2-(3-phenylphenyl)ethyl, 2-(4-phenylphenyl) ethyl), and 2-(4-benzylphenyl)ethyl or Q is a moiety that includes at least one substituted or unsubstituted heteroaromatic ring,
• iv. at least one monomer of formula III,
• wherein
• A is H or Me,
• L is a bond, C1-C3 alkylene or —(CRcRd—CR′cR′d—O)m;
• each Rc, Rd, R′c and R′d is independently H or alkyl;
• m is 2 to 10;
• and
• Q′ corresponds to one of the following formulae:
• wherein the symbol ● corresponds to the point of attachment to linker L;
• b. a cross-linker;
• and
• c. a plasticizer.