Holographic storage medium comprising polyfunctional epoxy monomers capable of undergoing cationic polymerization

The compound represented by the following structural formula:

• wherein R14 is represented by a structural formula selected from:
• each group R15, each group R17, each group R18, each group R19, each group R20 and each group R22 is independently a substituted or unsubstituted C1-12 alkyl, C1-12 cycloalkyl, aryl substituted C1-12 alkyl or aryl group;
• each group R16 is independently a substituted or unsubstituted C1-12 alkylene, C1-12 cycloalkylene, C1-12 arylalkylene, or arylene group, —Y1—[O—Y1]p—, —Y1—Si(Rz)2—Y1—, —Y1—Si(Rz)2—Y1—O—Y1—Si(Rz)2—Y1—, or —Y1—Si(Rz)2—Y1—Si(Rz)2—Y1—;
• each R21 is independently an epoxide substituted aliphatic group having 2-10 carbon atoms;
• R23 is independently hydrogen, an alkenyl, a substituted or unsubstituted C1-12 alkyl, C1-12 cycloalkyl, aryl substituted C1-12-alkyl or aryl or Rz—(O—Y1)m—, (Rz)3Si——(O—Si(Rz)2)q—Y1— or (Rz)3Si—(O—Si(Rz)2)q—O—;
• each group X is independently oxygen or R16;
• each Rz is independently a substituted or unsubstituted C1-12 alkyl group, C1-12 cycloalkylalkyl group, aryl substituted C1-12 alkyl group or aryl group;
• each Y1 is independently a C1-12 alkylene group;
• p is an integer from 1 to 5;
• m is an integer from 1 to 10;
• and q is an integer from 0 to 4.

The holographic recording medium comprising:

• (a) at last one polyfunctional epoxide monomer;
• (b) a binder which is capable of supporting cationic polymerzation;
• (c) and acid generator capable of producing an acid upon exposure to actinic radiation;
• and, optionally,
• (d) a sensitizer,
• wherein the polyfunctional epoxide monomer is by the following structural formula:
• wherein:
• X1 and X2 are independently each oxygen or a substituted or unsubstituted C1-12 alkylene, C1-12 cycloalkylene, C1-12 arylalkylene, or arylene group, —Y1—[O—Y1]p—, —Y1—Si(Rz)2—Y1—, —Y1—Si(Rz)2—Y1—O—Y1—Si(Rz)2—Y1—, or —Y1—Si(Rz)2—Y1—Si(Rz)2—Y1—;
• each group R2 is independently a substituted or unsubstituted C1-12 alky group, C1-12 cycloalkylalkyl group, aryl substituted C1-12 alkyl group or aryl group;
• each Y1 is independently a C1-12 alkylene group;
• p is an integer from 1 to 5;
• each Rz is independently a substituted or unsubstituted aliphatic group or a substituted or unsubstituted aryl group;
• n is 1, 2, 3 or 4;
• R is a substituted or unsubstituted aliphatic group, a substituted or unsubstituted aryl group or is represented by a structural formula selected from:
• each Rb is independently an epoxide substituted aliphatic group;
• and
• Rc is H, an unsubstituted aliphatic group, a substituted aliphatic group, an unsubstituted aryl group, a substituted aryl group, a substituted siloxane group, an unsubstituted siloxane group, a substituted polysiloxane group or an unsubstituted polysiloxane group.