Protective printing ink for process of acid-etching glass as well as preparation method and application thereof

Abstract

The invention relates to protective printing ink for the process of acid-etching glass. The resin components of the protective printing ink comprise the follow components in parts by weight: 45 to 60parts of o-alkyl phenolic epoxy acrylic acid resin, 5 to 10 parts of photopolymerizable monomer, 3 to 8 parts of photopolymerization initiator and 3 to 5 parts of epoxy resin. The printing ink obtained by taking the o-alkyl phenolic epoxy acrylic acid resin as a main component has excellent hydrofluoric acid corrosion resistance after being solidified on the surface of glass to form a film; compared with the traditional glass protective printing ink, the printing ink has the advantages that the hydrofluoric acid corrosion resistance is increased by one time, the adhesive force is 0 level and the hardness is moderate; compared with the traditional protective printing ink, the printing ink is more suitable for preparing 3D glass with AG effect; furthermore, the protective printing ink has excellent alkali dissolving property after being solidified on the surface of the glass to form a film, can be completely demolded and avoid residue when being soaked into a sodium hydroxide solution within 60 seconds, is favorable for improving the working efficiency and saves the aftertreatment working hours.

Description

technical field [0001] The invention relates to the field of printing, in particular to a protective ink for acid etching glass process and its preparation method and application. Background technique [0002] In recent years, with the continuous development and popularization of 3D curved screen smartphones and mobile devices, mobile phone screens or back covers with anti-glare frosting effect (AG effect) are gradually sought after by consumers, especially those with pattern effect and AG effect at the same time. Effect glass screens are especially popular with consumers. In order to achieve the AG effect, high concentrations of hydrofluoric acid must be used to etch the glass surface. surface protection. [0003] In the prior art, screen printing is usually used to coat the glass protective ink on the glass surface according to the pattern to be printed, and then etch the rest of the glass surface, and then wash off the protective ink to obtain an etched surface with AG e...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, screen printing is usually used to coat the glass protective ink on the glass surface according to the pattern to be printed, and then etch the rest of the glass surface, and then wash off the protective ink to obtain an etched surface with AG effect. However, since screen printing is only suitable for materials with a flat surface, the coating method using screen printing is also only suitable for coating glass protective ink on flat glass with a 2D or 2.5D screen body. It is not suitable for 3D glass whose surface is curved. After further research, the existing technology provides another solution to uniformly coat the glass protective ink on the surface of 3D glass by spraying. However, the spraying method cannot be used like a silk screen. Like the printing method, a specific pattern can be obtained on the glass surface, and only the entire glass surface can be coated. If a specific pattern is required, it is necessary to adopt a method of exposure in a specific area, that is, the optical transfer method to lighten the glass protective ink in the selected area. Curing to form a pattern, then use the developer to wash off the uncured ink, use hydrofluoric acid to etch, and then use lye to dissolve or degrade the cured ink to obtain a 3D glass material with AG effect

[0004] However, the preparation of 3D glass with AG effect by spraying requires the use of a light-cured glass protective ink with strong hydrofluoric acid resistance to ensure the structural stability of the protective ink during the hydrofluoric acid corrosion process after optical transfer, Will not cause transfer failure due to decomposition. In the prior art, as described in the technical solution disclosed in CN101126902B, the photocurable ink used is mostly obtained by esterification of bisphenol A type epoxy resin and a compound containing an acrylic structure. Alkali-soluble resin as the main component, together with solvent, pigment, photoinitiator and photopolymerization monomer to obtain glass protection ink, this kind of glass protection ink has poor hydrofluoric acid corrosion resistance, and is not suitable for the preparation of 3D inks with AG effect Glass, other existing technologies that have made certain improvements to the alkali-soluble resin components or added new additives have improved to a certain extent the ability to protect the ink from hydrofluoric acid, such as in CN104497944B by using epoxy soybean oil acrylic resin, Modified epoxy resin such as polyurethane modified epoxy resin is mixed with the same modified acrylate as the main resin, supplemented with acrylate, active monomer, photoinitiator, filler, auxiliary agent, etc., to obtain a hydrogen fluorine resistant Acid protective glue, after being coated on the glass surface and cured to form a film, etched by hydrofluoric acid with a concentration of 40wt% at 30°C, the difference in etching depth between the protected glass surface and the unprotected glass surface is 1.1mm. The protective glue has a certain resistance to hydrofluoric acid corrosion, but it takes a long time to dissolve and release the mold under alkaline conditions, about 30-70 minutes, and it is not suitable for the preparation of 3D glass with AG effect, and further improvement is still needed

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