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Ultraviolet curing liquid state optical cement and preparation method thereof

An optical glue and ultraviolet light technology, applied in the directions of adhesives, adhesive types, non-polymer adhesive additives, etc., can solve the problems of reducing the quality stability period of touch screen products, weak bonding strength, poor weather resistance, etc. The effect of transparency, high bond strength and good weather resistance

Active Publication Date: 2013-08-14
NICHE TECH KAISER SHANTOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing liquid optical adhesives generally have problems such as weak bonding strength, hard and brittle after curing, poor flexibility, and poor weather resistance, which greatly reduces the quality stability period of the touch screen product itself.

Method used

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  • Ultraviolet curing liquid state optical cement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In this embodiment, the preparation method of UV-curable liquid optical adhesive includes the following steps in sequence:

[0022] (1) By weight, take 67 grams of urethane acrylate oligomers (all are urethane acrylates with an average viscosity of 50,000 cps, an average molecular weight of 50,000, and a functionality of 2. The urethane acrylate is composed of long-chain polyols, cyanate-based monomer and acrylic monomer), 20 grams of (meth)acrylate (both 1,4-cyclohexanedimethanol methacrylate), 5 grams of photoinitiator (both phenylbenzophenone), 6 grams of silane coupling agent (both vinyltriethoxysilane) and 2 grams of additives (both plasticizer bis(2-ethyl)hexyl adipate), and added to a clean and dry reaction vessel, and then the materials in the reaction vessel were stirred at a stirring speed of 1200 rpm until uniformly mixed (stirring time was 50 minutes) to obtain a rubber compound;

[0023] (2) Degas the glue obtained in step (1) with a vacuum degassing machi...

Embodiment 2

[0027] In this embodiment, the preparation method of UV-curable liquid optical adhesive includes the following steps in sequence:

[0028] (1) By weight, take 55 grams of urethane acrylate oligomers (all are urethane acrylates with an average viscosity of 40,000cps, an average molecular weight of 35,000, and a functionality of 1. The urethane acrylate is composed of long-chain polyols, cyanate-based monomer and acrylic acid monomer), 32 grams of (meth)acrylate (both isobornyl methacrylate), 2 grams of photoinitiator (both 2,2'-diethyl oxyacetophenone), 1 gram of silane coupling agent (both 3-methacryloxypropyltrimethoxysilane) and 10 grams of additives (both plasticizer di-n-hexyl sebacate), and Add it into a clean and dry reaction container, and then stir the materials in the reaction container at a stirring speed of 1500 rpm until they are evenly mixed (the stirring time is 30 minutes) to obtain a rubber compound;

[0029](2) Defoaming the rubber compound obtained in step (...

Embodiment 3

[0033] In this embodiment, the preparation method of the UV-curable liquid optical adhesive comprises the following steps in sequence:

[0034] (1) By weight, take 60 grams of urethane acrylate oligomers (both are urethane methacrylates with an average viscosity of 45,000cps, an average molecular weight of 40,000, and a functionality of 1.5, which are composed of long-chain polyols, Monomers with isocyanate groups and acrylic monomers are copolymerized), 33 grams of (meth)acrylates (including 20 grams of isooctyl methacrylate, 13 grams of isobornyl methacrylate), 0.2 grams of light Initiator (both 2-hydroxy-2-phenylacetophenone), 3 g silane coupling agent (both 3-(2,3-glycidoxy)propyltrimethoxysilane) and 3.8 g co-agent agent (in which light stabilizer bis(3,5-di-tert-butyl-4-hydroxybenzyl monoethyl phosphate) nickel 0.3 g, plasticizer triphenyl phosphate 3.5 g), and added to the clean, dry reaction In the container, then the material in the reaction container is stirred unti...

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Abstract

The invention relates to ultraviolet curing liquid state optical cement which is prepared from the components in parts by mass as follows: 40-70 parts of polyurethane acrylate oligomer, 20-40 parts of (methyl) acrylic ester, 0.1-5 parts of photoinitiator, 1-10 parts of silane coupling agent and 0-10 parts of assistant. The invention further provides a preparation method of the ultraviolet curing liquid state optical cement. Besides the characteristics of transparent appearance, stable viscosity, low energy required for curing, quick curing speed, high refractive index and the like, the ultraviolet curing liquid state optical cement provided by the invention further has the excellent characteristics of great bonding strength, low hardness after curing, good flexibility and excellent weather ability.

Description

technical field [0001] The invention relates to an adhesive, in particular to an ultraviolet light-curable liquid optical adhesive for mounting a touch screen, and a preparation method of the ultraviolet light-curable liquid optical adhesive. Background technique [0002] Due to the combination of good visual presentation and convenient intuitive system operation, touch screens have been more and more widely used in electronic products such as mobile phones, tablet computers, TVs, and car navigation systems in recent years. [0003] At present, in the manufacture of touch screens, Liquid Optical Clear Adhesive (LOCA) is mostly used as the adhesive between the substrates. The existing liquid optical adhesives can meet some basic requirements, such as: colorless and transparent, specific light wave The transmittance in the wave band is above 90%, and the refractive index after curing is similar to that of the substrate to be bonded. However, the existing liquid optical adhesi...

Claims

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Application Information

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IPC IPC(8): C09J175/14C09J11/06
Inventor 周振基周博轩
Owner NICHE TECH KAISER SHANTOU
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