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Ultra-flexible polyurethane acrylate resin and liquid-state optical adhesive composition thereof

A technology of urethane acrylate and hydroxyalkyl acrylate, which is applied in the fields of ultra-flexible urethane acrylate resin, liquid optical adhesive composition, and acrylic resin, and can solve problems such as large shrinkage, low bonding strength, and poor weather resistance. Achieve the effects of small shrinkage, good flexibility and high bonding strength

Inactive Publication Date: 2015-09-09
深圳市浩力新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current liquid optical adhesives are mostly made of polybutadiene acrylate and polyisoprene acrylate as the main resin. When used in mobile phone electronic display devices, there are still low bonding strength, poor weather resistance, and shrinkage. Big defect, can not fully meet the needs of high-end touch screen

Method used

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  • Ultra-flexible polyurethane acrylate resin and liquid-state optical adhesive composition thereof
  • Ultra-flexible polyurethane acrylate resin and liquid-state optical adhesive composition thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation of super flexible polyurethane acrylate oligomer, the steps are:

[0029] Add 91.11g of 3500 molecular weight liquid hydroxyl-terminated polybutadiene rubber (hydroxyl content is 0.55mmol / g) and 0.1g of nitroxide radical polymerization inhibitor in the reaction vessel, dehydrate in vacuum for 1 hour at 100~105°C, cool to 60°C, add 80g of cyclohexane, stir well, add 6.02g of 1,6-hexamethylene diisocyanate, stir well, add tetraisooctyl titanate catalyst 0.04g, fill with high-purity nitrogen protection and stir well, heat up to 80 ~85°C, keep warm and reflux for 3 hours, cool down to 65~70°C; then add 2.87g of hydroxypropyl acrylate, heat up to 80~85°C, keep warm and reflux for 4 hours; wait until the temperature in the reaction vessel drops to 50°C , adding 0.5% absolute ethanol to react for 20 minutes, vacuum distillation to remove the solvent, and obtain super-flexible polyurethane acrylate oligomer.

Embodiment 2

[0031] The preparation method of the liquid optical adhesive composition can be combined with the ingredients shown in Table 1 and the shown quality to obtain the liquid optical adhesive compositions of 2, 3, and 4,

[0032] Table 1

[0033]

[0034]The liquid optical adhesive compositions prepared in Examples 1, 2, and 3 have no air bubbles in any of the high and low temperature impact tests, constant temperature and humidity tests, and atmospheric natural aging tests, and the physical and chemical properties are analyzed by the following analytical method, The results are shown in Table 2.

[0035] Table 2

[0036]

[0037] Shrinkage rate is measured according to GB1465-2005 liquid density and cured product density, calculated from the volume ratio of the two.

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Abstract

The invention discloses ultra-flexible polyurethane acrylate resin and a liquid-state optical adhesive composition thereof, and belongs to the technical field of polymer synthesis. The ultra-flexible polyurethane acrylate resin has a refractive index of 1.51, resin chromaticity APHA of 30, viscosity of 0.25 million of mPa.s, Tg lower than minus 40 DEG C and molecular weight of 10000-100000. The ultra-flexible polyurethane acrylate resin is prepared from the raw materials comprising liquid-state hydroxyl-terminated polybutadiene, aliphatic and / or alicyclic diisocyanate, a polymerization inhibitor, a catalyst, a solvent and hydroxyalkyl acrylate. A preparation method for the ultra-flexible polyurethane acrylate resin comprises the following steps: uniformly mixing the liquid-state hydroxyl-terminated polybutadiene, the aliphatic and / or alicyclic diisocyanate, the polymerization inhibitor, the catalyst and the solvent to obtain a mixture; then, adding the hydroxyalkyl acrylate into the mixture to react, thereby obtaining the ultra-flexible polyurethane acrylate resin. The ultra-flexible polyurethane acrylate resin has Tg lower than minus 40 DEG C, good flexibility and resin chromaticity APHA of 30. The liquid-state optical adhesive prepared by taking the resin disclosed by the invention as a main component has the advantages of high bonding strength and low shrinkage ratio.

Description

technical field [0001] The invention belongs to the technical field of polymer synthesis and relates to acrylic resins, in particular to a super-flexible polyurethane acrylate resin and a liquid optical glue composition mainly composed of it. Background technique [0002] As we all know, electronic display devices such as mobile phones, tablet computers, bank ATM machines, navigators, etc. have changed from traditional resistive touch screens to capacitive touch screens. Capacitive touch screens are easy to operate, fast in response and stable in performance. And has been widely used. [0003] The known structures of capacitive touch screens are G+G, G+F, G+F+F and OGS full lamination schemes, in which the glass protective panel and the ITO conductive glass need to be bonded and fixed to prevent falling off and Dust and water vapor enter and contaminate the ITO glass, affecting the conductivity of the ITO glass, thus making the touch control invalid. At present, most touch...

Claims

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Application Information

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IPC IPC(8): C08G18/67C08G18/62C09J175/14C09J11/08C09J11/06
Inventor 丁远有
Owner 深圳市浩力新材料技术有限公司
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