Low-viscosity optical adhesive composition, a preparation method thereof and application thereof to perfusion of touch screen to realize full lamination

Abstract

The invention provides a low-viscosity optical adhesive composition, which is prepared from the following components with contents in percentage by mass: 60 to 80 percent of vinyl silicone oil, 5 to 15 percent of hydrogen-containing polysiloxane, 1 to 3 percent of coupling agent, 3 to 15 percent of viscosity modifier, 1 to 3 percent of construction additive, 0 to 4 percent of photoinitiator, 0.001to 0.05 percent of catalyst and 0.001 to 0.05 percent of inhibitor. The low-viscosity optical adhesive composition can be used for quickly completing the full lamination of a super-large-size multipoint touch screen, moreover, cannot generate gas-bubble and adhesive-overflow phenomena, and meanwhile, has favorable bonding performance, temperature-resistant and damp-resistant reliability and coldand hot impact stability. The invention also provides a preparation method of the low-viscosity optical adhesive composition. The preparation method comprises the steps of proportioning, blending preparation, debubbling and subpackaging, and the like. The low-viscosity optical adhesive composition is simple in process and is safe and environment-friendly, and the industrialization is easily realized.

Description

technical field [0001] The present invention relates to a liquid optical adhesive and a preparation method thereof, in particular to a low-viscosity organic silicon liquid optical adhesive, a preparation method thereof, and its use in perfusion touch screen. Background technique [0002] When using silicone LOCA (Liquid Optical Transparent Glue) to fit the touch screen, the light and heavy release film can be avoided, cutting costs can be saved, the application is more flexible, the thickness can be controlled, and the process is relatively simple. In the process of subsequent use of the fitted touch screen, the reliability and touch sensitivity of the product have been significantly improved. However, the silicone LOCA with conventional viscosity (1000~3000mPa.s) has the following problems in the full lamination process of the ultra-large multi-touch screen (>84 inches): First, the natural flow rate of the silicone LOCA is slow, which makes the paste The production effi...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of poor flatness, prone to bubbles and low production efficiency when silicone LOCA is bonded to a super-large multi-point touch screen in the prior art, the invention provides a low-viscosity optical adhesive composition and a preparation method thereof , when the optical adhesive composition is poured into the touch screen, it can quickly complete the full lamination of the super-large multi-point touch screen, and there will be no bubbles and glue overflow, and it has good adhesive performance, temperature and humidity resistance and reliability. Thermal shock stability

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