Ultraviolet-curable white character jet-ink and preparation method thereof

Abstract

The invention discloses an ultraviolet-curable white character jet-ink which is prepared from the following components: oligomers, active monomers, titanium pigment, a photoinitiator, a dispersing agent and a surfactant. The invention also discloses a method for preparing the white character jet-ink, which comprises the following steps of: (1) raw material preparation, (2) high-speed shocking dispersion, (3) high-speed grinding, and (4) filtering. The ultraviolet-curable white character jet-ink disclosed by the invention is small in particle size, low in viscosity, good in inkjet performance, capable of being cured rapidly under ultraviolet light, high in hardness of film, and good in adhesion. The preparation method provided by the invention is scientific and reasonable in components, efficient and stable. The jet-ink disclosed by the invention can be widely used for printing various graphics and characters, and is especially suitable to be applied to electronic circuit boards.

Description

Technical field [0001] The present invention relates to the technical field of chemical industry, in particular to a UV-curable white character inkjet and a preparation method thereof, in particular to a UV-curable inkjet printing on electronic circuit boards (PCB) with excellent comprehensive performance The composition and preparation method of white character ink. Background technique [0002] Printed circuit boards are a fast-growing high-tech industry today, and the rapid development of inkjet printing technology has injected new vitality into this industry and brought major changes to the electronics industry. Inkjet printing is a printing technology that does not require contact, pressure, and printing plates. You only need to input the information stored in the computer into the inkjet printer to print. It also has the common features of plateless digital printing and can realize variable data printing. Compared with traditional methods, inkjet technology will bring fas...

AI Technical Summary

Problems solved by technology

There have been patent reports on UV-cured white inkjet. WO0246323 relates to a UV-cured white character ink applied to PCB boards. The ink is composed of titanium dioxide, oligomers, active monomers, dispersants, photoinitiators, etc. The viscosity at 25°C is 40-200cps, and at 50-80°C it is 10-20cps. The main disadvantage of this ink is its high viscosity. Inkjet printing needs to be carried out at a higher temperature, and the requirements for equipment Relatively high, it is difficult to ensure the stability of ink ejection

An important problem of white ink is to solve its dispersibility, because the dispersibility of most white inks is not very good. For inkjet printing technology, poor dispersibility will lead to problems such as nozzle plugging

US7635504 relates to a UV-curable white ink, which contains two dispersants to solve the problem of dispersibility. It has better dispersibility and high hardness, but its viscosity is relatively high, and it can be used for inkjet, but it has high requirements for equipment, and poor ejection stability

US7026368 relates to a UV-curable inkjet ink, which has good dispersibility, redispersibility, spray stability and good hiding power, but its adhesion and hardness are low

[0005] The electronic circuit board in the prior art is a kind of epoxy-modified glass fiber, and its surface free energy is low, polarity is weak, and general ink is difficult to wet on PCB board, and the adhesive force of coating film is bad, and because white Titanium dioxide in the ink has a large specificity, is difficult to disperse, and is easy to settle. Therefore, the existing UV-cured white character inkjet has some defects, and the overall performance needs to be improved.

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