Patent ID: 11860539
Assignee: SHOWA KAKO CORPORATION
Field: Optics (Instruments)
Classification: CPC G  C | IPC C  G

Claim 4:
5. A method of manufacturing a photosensitive resin comprising a water-based, water-processable, non-saponified, and non-hydrolyzed vinyl acetate polymer added with at least one group selected the group consisting of a styrylpyridinium group and a styrylquinolinium group that are represented by one or more of respective formulae in the following formulae (A) and (B):, wherein A represents:, or, wherein, R1 is a hydrogen atom or an alkyl or aralkyl group which optionally contains a hydroxyl group, a carbamoyl group, an ether bond, or an unsaturated bond; R2 is a hydrogen atom or a lower alkyl group; and X− is a halide ion, a phosphate ion, a p-toluene-sulfonate ion, a methyl sulfate ion, an ethyl sulfate ion, or mixture of two or more of said ions,, wherein A represents:, or, wherein, R1 is a hydrogen atom or an alkyl or aralkyl group which optionally contains a hydroxyl group, a carbamoyl group, an ether bond, or an unsaturated bond; R2 is a hydrogen atom or a lower alkyl group; and X− is a halide ion, a phosphate ion, a p-toluene-sulfonate ion, a methyl sulfate ion, an ethyl sulfate ion, or mixture of two or more of said ions,
the method comprising:
adding a photosensitive compound to a water-based, water-processable, non-saponified, and non-hydrolyzed vinyl acetate polymer in the presence of an acid catalyst, the photosensitive compound selected from a group consisting of:
(1) at least one compound selected from the group consisting of styrylpyridinium compound and a styrylquinolinium compound, possessing a formyl group and represented by a respective formula in the following formula:, wherein A is:, or, wherein, R1 is a hydrogen atom, an alkyl group, or a lower hydroxyalkyl; R2 is a hydrogen or an alkyl group; and X− is a strong acidic ion, and
(2) at least one compound selected from the group consisting of a styrylpyridinium compound and a styrylquinolinium compound, possessing an acetal group and represented by a respective formula in the following formulae:, wherein A represents:, or, wherein, R1 is a hydrogen atom, an alkyl group, or an aralkyl group; R2 is a hydrogen atom or an alkyl group; two R3 are each selected from a group consisting of an alkyl group and a phenyl group or are combined forming an alkenyl group n is an integer having a value between 1 and 6 inclusive; and X− is a strong acidic ion.