A kind of environment-friendly processing-free photosensitive adhesive preparation process

Abstract

The invention relates to an environment-friendly process-free photosensitive adhesive preparation process, the steps of which are: oil phase configuration, 8-10 parts of infrared absorbing dyes with absorption spectrum wavelengths at 700nm-1100nm and 45-60 parts of nano-polymer microspheres After the corresponding monomer is dissolved evenly, add it to the reaction bottle for use; for water phase configuration, mix 45-60 parts of deionized water, 6-8 parts of emulsifier, and 10-20 parts of volatile organic solvent, and then add 10 parts of nano iodine ‑20 parts continue to stir and mix evenly for use; mix evenly, mix and stir the two mixed solutions in step S1 and step S2 to obtain an emulsion; polymerize, add an aqueous solution containing an oxidant to the emulsion, and initiate a polymerization reaction ; The reaction continued for 3-10 hours, and the aqueous solution containing the reducing agent was added, and the reaction was continued for 3-5 hours to obtain a stable polymer emulsion containing infrared absorbing dyes. The present invention improves its storage time by introducing light-shielding materials into the colloid, and can be stored for a long time even under the irradiation of (natural light source) light.

Description

technical field [0001] The invention relates to the field of photosensitive materials, in particular to a process for preparing an environment-friendly treatment-free photosensitive adhesive. Background technique [0002] In the field of general lithographic printing, the printing plate is the printing graphic carrier that transfers ink to the substrate. The graphic information on the original manuscript is transmitted to the printing plate, and the surface of the printing plate is divided into the inked graphic part and the non-inked blank part. When printing, the ink attached to the graphic part is transferred to the substrate under the action of pressure. The graphic part and the blank part on the lithographic printing plate have no obvious difference in height and are almost on the same plane. The graphic part is lipophilic and hydrophobic, and the blank part is hydrophilic and oleophobic. Using the principle of water and oil incompatibility, the separation of the grap...

AI Technical Summary

Problems solved by technology

However, there are many problems in this system: First, because the infrared absorbing dye is difficult to dissolve in water, during the compounding process, organic solvents will be mixed in to increase the compatibility of the dye, which will reduce the stability of the emulsion and make the emulsion not environmentally friendly.

Second, since the infrared absorbing dye is not covered by the polymer, it is easy to decompose when exposed to visible light for a long time, and the stability of the dye will decrease accordingly, which will reduce the sensitivity of the heat-sensitive material in the future

Third, the combination of infrared absorbing dye and emulsion is a multi-system, which increases the difficulty of system preparation

Fourth, the infrared absorbing dye and nanoparticles are in a separate state in the system. Under the action of infrared light, the polymer nanoparticles cannot be effectively broken and undergo a thermal phase change. The resulting image has a small contrast and is easy to break during the development process.

[0004] Although the above-mentioned patent solves the storage time, it is only limited to the case of no light irradiation. Once it is exposed to light due to its own infrared absorption properties, it is very prone to photochemical reactions, making storage unstable.

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