Preparation method of high-temperature color retention printing ink

Abstract

The invention discloses a preparation method of high-temperature color retention printing ink, which comprises the following procedures of: 1) adding an appropriate amount of polyester modification methoxyphenyl silicon resin, barium sulfate and the like into a refiner and performing grinding and dispersion to form a primary product, 2) adding octaphenyl polyoxyethyiene, polytetrafluoroethylene wax, polyether modified siloxane and an organosilicon defoaming agent into the primary product and performing grinding and dispersion to form a secondary product, 3) adding hexamethoxy methyl melamine resin into the secondary product and performing grinding, dispersion, filtration and discharging to form an ink main agent, and 4) adding an appropriate amount of dimethylbenzene and cyclohexanone into the ink main agent and performing stirring to form the high-temperature color retention printing ink. The ink prepared by the method has high temperature resistance and good printability and paint film performances. With the adoption of barium sulfate, silicon dioxide and low melting point glass powder as filling, the filming heat resistance of the ink is improved; the rheological and thixotropic properties of the ink are adjusted; and the physical mechanical strength of a film layer is improved.

Description

technical field [0001] The invention relates to the technical field of inks, in particular to a method for preparing printing inks capable of maintaining color at high temperatures. Background technique [0002] The intelligentization of electronic products is the development trend of the times. With the wide application of touch screens in smart phones, tablet computers and other fields, the touch screen industry has developed rapidly. The integrated capacitive touch screen (OGS) can meet the ultra-thin requirements of intelligent terminals of electronic products to the greatest extent, and is an inevitable choice for high-end brand terminals with touch screens in the future. The OGS touch screen is coated with ITO conductive film on the ink film layer. Since the ITO coating process needs to be completed at a high temperature of 280 ° C ~ 300 ° C, the touch screen ink must have excellent high temperature resistance. [0003] High temperature resistant touch screen ink is ...

AI Technical Summary

Problems solved by technology

However, the existing high-temperature-resistant inks based on inorganic glass are difficult to maintain high-temperature thermal stability, while having good physical and mechanical properties and chemical reagent corrosion resistance.

For example, some high-temperature resistant inks have good heat resistance and adhesion, but their silk screen printing process costs are high, which is not conducive to wide application in industry; some high-temperature resistant inks have good chemical corrosion resistance , adhesion and hardness, but its heat-resistant temperature is limited, and it is difficult to withstand baking at 200°C