A kind of preparation method and application of sheet-fed offset printing ink with low voc content

Abstract

The invention relates to a preparation method and application of a sheet-fed offset printing ink with low VOC content. A preparation method of sheet-fed offset printing ink with low VOC content, mixing linking material, fatty acid methyl ester and pigment, grinding to make the fineness below 15 μm, and then adding drier, antioxidant and wax powder for conditioning, namely Get offset printing ink. In the present invention, the binder and offset printing ink are prepared by using dry and semi-dry vegetable oil with fatty acid methyl ester and high-viscosity, low-solubility high-structure rosin-modified phenolic resin, and the obtained offset printing ink has high viscoelasticity and good dryness. It solves the problems of soft bones, flying ink, and slow drying caused by using fatty acid methyl ester as a solvent. The present invention replaces mineral oil with fatty acid methyl ester as a solvent, so that the prepared offset printing ink does not contain mineral oil, and the VOC content is less than 4%, which meets the standard of "HJ / T370 Environmental Labeling Product Technical Requirements Offset Printing Ink".

Description

technical field [0001] The invention relates to the preparation of a sheet-fed offset printing ink with low VOC content, in particular to a preparation method and application of a sheet-fed offset printing ink with low VOC content. Background technique [0002] As people pay more and more attention to environmental protection issues, environmentally friendly offset printing inks are also constantly developing. In order to reduce the VOC content in offset printing inks, soybean oil-based inks introduced earlier used soybean oil to replace some petroleum-based mineral oils (organic solvents containing alkanes and aromatics), and the VOC content in inks was reduced from the original 30% to 60%. to 10% to 25%, but there is still petroleum-based mineral oil in the solvent, and the VOC content fails to meet the environmental protection standard of "HJ / T370 Environmental Labeling Product Technical Requirements for Offset Printing Inks". Then all vegetable oil-based offset printing...

AI Technical Summary

Problems solved by technology

The molecular weight of fatty acid ester is low, the viscosity is close to that of mineral oil, has good permeability, and has good solubility to resin, but the boiling point of fatty acid ester is higher than that of mineral oil, so the solubility of fatty acid ester is too good, so that the solvent release is slightly poor, and it is dry slow

Patent CN201310738318.5 uses fatty acid methyl ester prepared from waste vegetable oil as a solvent to prepare fatty acid methyl ester type offset printing ink, and adjusts the resin by controlling the oiliness of alkyd resin, the functionality of polyols, and the amount of maleic anhydride. Drying speed, the drying speed of the prepared ink conjunctiva is greater than 48h, and the drying property needs to be improved

In addition, the characteristics of low viscosity and good solubility of fatty acid ester make the viscosity and viscosity of the binder prepared with it low, the viscoelasticity of the ink is reduced, the body bone is soft, and problems such as misting and printing quality are prone to occur.

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