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Solvent-free type environment-friendly semi-curing optical adhesive tape and preparation method thereof

A semi-curing, solvent-free technology, used in adhesive types, adhesives, grafted polymer adhesives, etc., can solve the problems of insufficient adhesion, easy to overflow glue, thickness error, etc., to overcome the large thickness error , the preparation method is simple, the process design is reasonable

Active Publication Date: 2017-02-22
CHANGZHOU HUAKE POLYMERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Solid optical tape is used to bond the upper and lower surfaces in the form of double-sided tape, which is prone to bubbles, wrinkles, and cannot meet the use environment with large temperature differences. The adhesion is not high enough and the yield rate is low.
Liquid optical adhesive emerged as the times require, which overcomes the shortcomings of solid optical tape that cannot meet the use environment with large temperature differences and insufficient adhesion. rework

Method used

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  • Solvent-free type environment-friendly semi-curing optical adhesive tape and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 210g of T5650J and 33g of Nadic acid anhydride to the reactor, feed nitrogen gas and start stirring, heat up to 165°C, keep warm for about 6 hours, acid value: 0.08, finish the reaction and cool down to normal temperature, then put it into a stirred reaction tank, Add 1015.2g of lauryl acrylate, 366.6g of 2-hydroxyethyl methacrylate, 1.61g of dialkoxyacetophenone into the reaction tank, blow in nitrogen, start stirring and then turn on the UVA lamp until the UVA energy accumulates to 950mj / cm 2 Afterwards, oxygen was introduced to obtain a prepolymer with a viscosity of 1456cP (25°C).

[0022] Add 3.5 g of methacryloxypropyl trimethoxysilane, 0.0035 g of α-aminoalkylphenone, and 0.00875 g of benzyl dithiobenzoate into the reaction tank, and stir evenly.

[0023] Apply the above mixture between two release films, and the UV light intensity is 10mW / cm 2 , the cumulative irradiation energy is 1050mj / cm 2 , to obtain a semi-cured optical adhesive tape with a thickne...

Embodiment 2

[0025] Add 250g of G3450J and 20.4g of maleic anhydride into the reaction kettle, feed nitrogen and start stirring, heat up to 165°C, keep the temperature for about 6 hours, acid value: 0.06, finish the reaction and cool down to normal temperature, then put it into a stirring reaction tank, Add 420g of n-propyl acrylate, 391.7g of 2-hydroxyethyl methacrylate, 1.08g of dialkoxyacetophenone into the reaction tank, feed nitrogen, start stirring, and then turn on the UVA lamp until the UVA energy is accumulated to 950mj / cm 2 Afterwards, oxygen was introduced to obtain a prepolymer with a viscosity of 1750cP (25°C).

[0026] Then add 2.7g of methacryloxypropyltrimethoxysilane, 0.0027g of α-aminoalkylphenone, and 0.00675g of benzyl dithiobenzoate into the reaction tank, and stir evenly.

[0027] Apply the above mixture between two release films, and the UV light intensity is 8mW / cm 2 , the cumulative irradiation energy is 850mj / cm 2 , to obtain a semi-cured optical adhesive tape...

Embodiment 3

[0029] Add 400g of G3450J and 60.7g of Nadic acid anhydride to the reactor, feed nitrogen and start stirring, heat up to 165°C, keep warm for about 6 hours, acid value: 0.075, finish the reaction and cool down to normal temperature, then put it into a stirred reaction tank , add 1978.8g lauryl acrylate, 790.4g-2-hydroxyethyl methacrylate, 3.24g dialkoxyacetophenone into the reaction tank, feed nitrogen, start stirring and then turn on the UVA lamp until the UVA energy is accumulated to 950mj / cm 2 Afterwards, oxygen was introduced to obtain a prepolymer with a viscosity of 2000cP (25°C).

[0030] Then add 7.03g of methacryloxypropyltrimethoxysilane, 0.007g of α-aminoalkylphenone, and 0.0175g of benzyl dithiobenzoate into the reaction tank, and stir evenly.

[0031] Apply the above mixture between two release films, and the UV light intensity is 16mW / cm 2 , the cumulative irradiation energy is 1650mj / cm 2 , to obtain a semi-cured optical adhesive tape with a thickness of 500 ...

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Abstract

The invention relates to the field of an optical adhesive tape and especially relates to a solvent-free type environment-friendly semi-curing optical adhesive tape and a preparation method thereof. The preparation method comprises the following steps: firstly, causing the polycarbonate diol with low molecular weight and the carboxylic acid with unsaturated double bond have esterification reaction; adding acrylate monomer and photoinitiator and performing polymerization reaction under ultraviolet radiation, thereby acquiring a pre-polymer; uniformly mixing the pre-polymer, the acrylate monomer, the chain transfer agent and the photoinitiator and then coating, and coating the mixture between two layers of release films under ultraviolet irradiation, thereby acquiring the solvent-free type environment-friendly semi-curing optical adhesive tape. The solvent-free type environment-friendly semi-curing optical adhesive tape provided by the invention has the characteristics of excellent water resistance, durability, yellowing resistance, high hardness and adhesive strength, low cure shrinkage rate, environmental protection, and the like.

Description

technical field [0001] The invention relates to the field of optical tapes, in particular to a solvent-free environment-friendly semi-cured optical tape and a preparation method thereof. Background technique [0002] Solid optical tape is used to bond the upper and lower surfaces in the form of double-sided tape, which is prone to air bubbles, wrinkles, and cannot meet the use environment with large temperature differences. The adhesion is not high enough and the yield rate is low. Liquid optical adhesive emerged as the times require, which overcomes the shortcomings of solid optical tape that cannot meet the use environment with large temperature differences and insufficient adhesion. rework. Contents of the invention [0003] The purpose of the invention is to improve the adhesion and durability of the semi-cured optical adhesive tape by introducing some carbonate bonds into its structure. By synthesizing a solvent-free environmentally friendly semi-cured optical tape,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J151/00C08G64/42C08F283/02C08F285/00C08F220/18C08F220/28C08F230/08
CPCC09J7/00C09J151/003C08F283/02C08F285/00C08G64/42C09J2451/00C08F220/1803C08F230/08C08F220/281C08F220/1812
Inventor 宋瑾杨伟周国友
Owner CHANGZHOU HUAKE POLYMERS
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