Preparation process of environment-friendly treatment-free photosensitive resist

Abstract

The invention relates to a preparation process of an environment-friendly treatment-free photosensitive resist. The process comprises the following steps of configuring an oil phase, namely uniformlydissolving 8 to 10 parts of infrared absorbing dyes with the absorption spectrum wavelength being 700 nm to 1100 nm and corresponding monomers of 45 to 60 parts of nanometer polymer microspheres and adding into a reaction flask for later use; configuring a water phase, namely uniformly mixing 45 to 60 parts of deionized water, 6 -8 parts of emulsifiers and 10 to 20 parts of volatile organic solvents, adding 10 to 20 parts of nanometer iodine elementary substances, continuously stirring and uniformly mixing for later use; uniformly mixing, namely uniformly mixing and stirring two mixed solutions in the step S1 and the step S2 to obtain an emulsion; carrying out polymerization reaction, namely adding an aqueous solution containing an oxidizing agent into the emulsion, and initiating polymerization reaction; and keeping the reaction for 3 to 10 hours, adding an aqueous solution containing a reducing agent, and continuously reacting for 3 to 5 hours to obtain a stable polymer emulsion containing the infrared absorption dyes. According to the preparation process, a light-shielding material is introduced into a colloid, so that the storage time is improved, and the long-time storage canbe also achieved even under the irradiation of light (natural light source).

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.

Images