Environment-friendly damp-proof UV gloss oil and preparing method thereof

Abstract

The invention discloses an environment-friendly damp-proof UV gloss oil and a preparing method thereof. The environment-friendly damp-proof UV gloss oil comprises a polyurethane-acrylate prepolymer, anano-bimetallic oxide adsorption material, a photoinitiator, a stabilizer, a flatting agent and a defoaming agent. The preparing method of the environment-friendly damp-proof UV gloss oil includes the steps of weighing all the raw materials, and putting all the raw materials into a high-speed disperser to be dispersed to obtain the environment-friendly damp-proof UV gloss oil. The polyurethane-acrylate prepolymer does not contain volatile organic matter or reactive diluents and is harmless to a human body and environmentally friendly; the nano-bimetallic oxide adsorption material has strong adsorption performance and can adsorb damp water and prevent water mist; the compound photoinitiator has the advantages of being short in curing time and large in absorption wavelength and has the optimal photo-curing speed; the environment-friendly damp-proof UV gloss oil is high in adhesive force, high in curing speed and almost free of water mist.

Description

technical field [0001] The invention relates to the technical field of printing materials, in particular to an environment-friendly and moisture-proof UV varnish and a preparation method thereof. Background technique [0002] Paper varnish, also known as cover varnish or polishing oil, is a decorative and protective coating used in the surface decoration of printed matter, mainly used in post-print finishing and packaging materials. With the rapid and steady development of the market economy and commodity economy, people pay more and more attention to the printing and decoration of food packaging, books, magazine covers, calendars, pictures, medicine boxes, cigarette packets, etc. And it has a magnificent surface gloss, which is the special effect produced by applying varnish on the printed matter. Coating varnish on the printed matter can not only increase the value of the printed product, but also enhance the optical rotation resistance of the ink, increase the heat and m...

AI Technical Summary

Problems solved by technology

[0004] However, since most of the UV curing varnishes currently used in China are solvent-based, it is necessary to use acrylate reactive diluent monomers in the formula. These monomers may be harmful to the environment and human health, which affects its application and promotion. : One is that reactive diluents are irritating to human skin, mucous membranes and eyes, and some have a bad smell; the other is that oligomers have a high viscosity. When coating, especially in the spraying process, a large amount of reactive diluents must be added, sometimes Adding organic solvents is not safe and pollutes the environment; the third is that the photocuring system is mainly free radical photopolymerization, due to oxygen inhibition, the polymerization is not complete, and the active diluent still remains in the cured coating; the fourth is oily photocurable materials, Organic solvents are required for coating equipment and container cleaning

In addition, paper is a kind of porous adsorption medium. During the coating and curing process, the active monomer is difficult to react completely, and it is easy to absorb and remain in the paper fiber layer, which will have a negative impact on the long-term performance of printed matter and the safety indicators of the environment.

In addition, due to the smooth surface and poor absorption of the printed matter after spraying the varnish, it is easy to generate misty droplets between the film and the printed matter during the process of coating the outer layer of the product, and adhere to the film, even paper and Partial adhesion of the film will seriously affect product quality

At present, the water mist is mainly solved by adding polyethylene wax, modified polyethylene wax or adjusting the ratio of varnish and matte oil, but none of them can completely solve the water mist and the gloss of the product is seriously reduced.

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