Volume type hologram recording photosensitive composition, volume type hologram recording medium using the same and method of producing volume type hologram
AssigneeDai Nippon Printing Co., Ltd.
InventorsHiroyuki Otaki, Toshio Yoshihara
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Abstract
The present invention provides a volume type hologram recording photosensitive composition. A type (i) composition comprises one or more photopolymerizable compounds, a heat-curable compound and a heat-curing crosslinking agent, wherein the heat-curing crosslinking agent is a latent heat-curing crosslinking agent which is not reacted in an interference exposure process, is not reacted at the heating temperature used in a refractive index-modulation promoting process and becomes active at the heating temperature used in a heat-curing process. A type (ii) composition further comprises a binder resin beside the type (i) volume type composition.
Claims12
A volume type hologram recording photosensitive composition comprising one or more photopolymerizable compounds, a heat-curable compound and a heat-curing crosslinking agent, wherein the heat-curing crosslinking agent is a blocked carboxylic acid compound obtained by blocking a compound having two or more carboxyl groups with a vinyl ether compound represented by the following formula:
- wherein R1 represents alkyl,
- and the blocked carboxylic acid compound is a latent heat-curing crosslinking agent which is not reacted in an interference exposure process, is not reacted at a heating temperature used in a refractive index modulation promoting process and becomes active at a heating temperature used in a heat-curing process.
A volume type hologram recording photosensitive recording medium provided with a layer of a volume type hologram recording photosensitive composition on a transparent film substrate, wherein the volume type hologram recording photosensitive composition comprises one or more photopolymerizable compounds, a heat-curable compound and a heat-curing crosslinking agent, the heat-curing crosslinking agent being a blocked carboxylic acid compound obtained by blocking a compound having two or more carboxyl groups with a vinyl ether compound represented by the following formula:
- wherein R1 represents alkyl,
- and, the blocked carboxylic acid compound being a latent heat-curing crosslinking agent which is not reacted in an Interference exposure process, is not reacted at a heating temperature used in a refractive index modulation promoting process and becomes active at a heating temperature used in a heat-curing process.
A method of producing a volume type hologram, the method comprising steps of:
- providing a volume type hologram recording photosensitive composition comprising one or more photopolymerizable compounds, a heat-curable compound and a heat-curing crosslinking agent, the heat-curing crosslinking agent being a latent heat-curing crosslinking agent which is not reacted in an interference exposure process, is not reacted at a heating temperature used in a refractive index modulation promoting process and becomes active at a heating temperature used in a heat-curing process;
- applying the volume type hologram recording photosensitive composition to a transparent substrate to form a coating layer;
- and performing at least, an interference exposure process of exposing the coating layer to interference light, a refractive index modulation promoting process of heating the coating layer at a temperature lower than that at which the latent heat-curing crosslinking agent becomes active to promote the modulation of refractive index, and a heat-curing process of heating the coating layer at a temperature not lower than that the latent heat-curing crosslinking agent becomes active to heat-cure the coating layer;
- and
- wherein the heat-curing crosslinking agent is a blocked carboxylic acid compound obtained by blocking a compound having two or more carboxyl groups with a vinyl ether compound represented by the following formula:
- wherein R1 represents alkyl.
Dependencies are inferred from the claim text.