Optical cement for silver nanowire conductive film and preparation method thereof

Abstract

The invention discloses an optical cement for a silver nanowire conductive film and a preparation method thereof. The optical cement is prepared from the following raw materials of polyurethane-modified acrylate pre-polymer, an active thinning monomer, a photoinitiator, an antioxidant, a silver stabilizer, a photostabilizer, a yellowing-resistant polymerization inhibitor and a benzotriazole UV (ultraviolet) absorbent. The optical cement has the advantages that under the synergistic action of the raw materials, the transmittance is high, the reflectivity is high, the high temperature and high humidity-resistant property is realized, the UV aging-resistant property is realized, the yellowing-resistant property is realized, and the energizing stability under the high temperature and high humidity environment is greatly improved.

Description

technical field [0001] The invention relates to an optical adhesive for a silver nanowire conductive film used in a display electronic component and a preparation method thereof. Background technique [0002] Along with the rapid development of the information industry, mobile phones, notebook computers, personal digital assistants (PDAs) and other handheld entertainment electronic products have become the necessities of people's lives. my country is a big producer of touch modules. In large-size touch screens, the existing transparent conductive material ITO is used in conjunction with OCA optical glue to prepare touch modules. [0003] OCA optical adhesive is a special adhesive that has similar optical properties to transparent optical components and has good bonding performance. It bonds two or more transparent optical components into an optical component that can meet the requirements of optical path design, such as conductive in LCD Glass and liquid crystal layer. The...

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Problems solved by technology

[0004] Existing optical adhesives have the defects of strong hygroscopicity and poor moisture resistance in application. The molecular chains of main resins such as epoxy acrylate contain hydrophilic oxygen-containing groups, which make liquid optical adhesives have certain hygroscopicity. After the bonding of transparent optical components, the moisture in the air is continuously absorbed during long-term use, resulting in swelling of the adhesive layer, a decrease in mechanical properties and light transmittance, and a decrease in the reliability and durability of the corresponding equipment

At the same time, the existing optical glue also has poor compatibility with the transparent conductive film of silver nanowires. It is prone to yellowing after long-term high-temperature and high-humidity energization and UV irradiation, poor high-temperature and high-humidity energization stability, poor water resistance, and silver nanowires. Problems such as oxidation of components in optical glue

[0005] At present, the above problems seriously restrict the industrial application of silver nanowire transparent conductive films. In order to solve the above technical problems, an optical adhesive suitable for silver nanowire conductive films needs to be studied urgently.

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