White ink with superstrong covering properties

Abstract

The invention discloses a white ink with superstrong covering properties. The white ink is prepared from the following raw materials by mass: 52-68 parts of polyester modified methylphenyl silicone resin, 25-40 parts of titanium dioxide, 1.5-4 parts of barium sulfate, 1.5-4 parts of silica, 2-5 parts of glass powder, 1.5-6 parts of xylene, 1.5-6 parts of cyclohexanone, 1.3-6.5 parts of hexakis(methoxymethyl)melamine resin, 1-5 parts of octylphenol polyoxyethylene ether, 1-5 parts of modified chlorinated polypropylene, 1-3 parts of polytetrafluoroethylene wax, and 1-3 parts of polydimethylsiloxane. The white ink provided by the invention selects polyester modified methylphenyl silicone resin as the binding material, which not only has the excellent thermal stability of methylphenyl silicone resin, but also has good flexibility of linear polyester. Titanium dioxide is selected as the pigment, not only has high covering power, high whiteness and strong mechanical strength, but also has excellent heat resistance, high temperature color retention and low thermal conductivity.

Description

technical field [0001] The invention relates to the technical field of inks, in particular to white inks with super strong covering performance. 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 mainly composed of linking materials,...

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