Preparation method of optical transparent two-sided sticky tape

A double-sided tape, optically transparent technology, used in chemical instruments and methods, adhesives, film/flake adhesives, etc., can solve the yellowing of OCA optical tape products, affect the quality of touch screens, and it is difficult to make thick films. and other problems, to avoid oxidative discoloration, improve visibility, and achieve the effect of excellent light transmittance

Active Publication Date: 2014-05-07
SICHUAN DONGFANG INSULATING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

OCA optical tapes in the prior art mainly exist in the form of pure film. Although it has the advantages of uniform material, consistent refractive index and good filling performance, it still has the following two disadvantages: (1) It is coated by solvent method, It will be limited by the contradictory relationship between the solid content and viscosity of the glue, so it is difficult to make the glue film thick and well; (2) OCA optical tape products appear yellowing, and even under long-term contact, due to the acid and alkali components on the metal , ITO (indium tin oxide) components cause corrosion, which affects the quality of the touch screen

Method used

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  • Preparation method of optical transparent two-sided sticky tape
  • Preparation method of optical transparent two-sided sticky tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] ●Preparation of acrylate prepolymerized resin

[0034] At room temperature, mix 30kg butyl acrylate, 15kg isooctyl acrylate, 30kg ethyl methacrylate, 20kg methoxyethyl acrylate, 5kg glycidyl methacrylate, 100kg solvent (ethyl acetate: butanone=1:1) , and 0.3kg of benzoyl peroxide were added to a reaction kettle with a condensing reflux device, stirred at a rotation speed of 200rpm, and mixed evenly; under the protection of nitrogen, the temperature was gradually raised to 75°C, reacted for 4h, and stopped heating. Then add 50.45kg of solvent (ethyl acetate: butanone = 1:1) and mix evenly, cool to room temperature and discharge to prepare acrylate prepolymer resin (1) for later use. The solid content after drying at 90°C 40%.

[0035] ●Preparation of acrylate optical glue

[0036] (1) Formula (unit: kg)

[0037]

[0038] (2) Preparation process

[0039] Add the acrylate prepolymerized resin (1) in the above formula into the mixing tank, start stirring at a speed o...

Embodiment 2

[0041] ●Preparation of acrylate prepolymerized resin

[0042]At room temperature, mix 20kg butyl acrylate, 10kg isooctyl acrylate, 25kg ethyl methacrylate, 30kg methoxyethyl acrylate, 15kg glycidyl methacrylate, 100kg solvent (ethyl acetate: butanone=1:1) , and 0.5kg of benzoyl peroxide were added to the reaction kettle with a condensing reflux device, so that the temperature of the condenser was controlled at 20±5°C, stirred at a rotation speed of 200rpm, and mixed evenly; under the protection of nitrogen, the temperature was gradually raised to 70°C , Reaction 4h, stop heating. Then add 50.75kg of solvent (ethyl acetate: butanone = 1:1) and mix evenly, cool to room temperature and discharge to prepare acrylate prepolymer resin (2) for later use. The solid content after drying at 90°C 40%.

[0043] ●Preparation of acrylate optical glue

[0044] (1) Formula (unit: kg)

[0045]

[0046] (2) Preparation process

[0047] Add the acrylate prepolymerized resin (2) of the ab...

Embodiment 3

[0049] ●Preparation of acrylate prepolymerized resin

[0050] At room temperature, mix 30kg butyl acrylate, 10kg isooctyl acrylate, 30kg ethyl methacrylate, 20kg methoxyethyl acrylate, 10kg glycidyl methacrylate, 100kg solvent (ethyl acetate: butanone=1:1) , and 0.5kg of azobisbutyronitrile were added to a reaction kettle with a condensing reflux device, stirred at a rotation speed of 200rpm, and mixed uniformly; under the protection of nitrogen, the temperature was gradually raised to 75°C, reacted for 4h, and stopped heating. Then add 50.75kg of solvent (ethyl acetate: butanone = 1:1) and mix evenly, cool to room temperature and discharge to prepare acrylate prepolymer resin (3) for later use. The solid content after drying at 90°C 40%.

[0051] ●Preparation of acrylate optical glue

[0052] (1) Formula (unit: kg)

[0053]

[0054] (2) Preparation process

[0055] Add the acrylate prepolymerized resin (3) in the above formula into the mixing tank, start stirring at a ...

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Abstract

The invention discloses a preparation method of an optical transparent two-sided sticky tape. The preparation method is characterized by comprising the following steps: adding butyl acrylate, iso-octyl acrylate, ethyl methacrylate, functional monomers, glycidyl methacrylate, solvent I and an initiator to a reaction kettle to carry out copolymerization for 4-6h under the protection of nitrogen, thus obtaining acrylate prepolymer resin; mixing the acrylate prepolymer resin with a curing agent and a diluting solvent to obtain an acrylate optical glue; uniformly spreading the acrylate optical glue on polyester release film A with a comma blade by a coating machine and then feeding the polyester release film A coated with the acrylate optical glue into a six-section drying channel at a linear velocity of 5-15m / min, wherein the length of the drying channel is 20-25m and the temperature of the drying channel is 65-100 DEG C; compounding the polyester release film A and polyester release film B which are the same in width under the pressure of a compression roller being 0.4MPa; curing in a 40-45 DEG C drying room, thus obtaining the optical transparent two-sided sticky tape. The optical transparent two-sided sticky tape has extremely low viscosity and excellent performance.

Description

technical field [0001] The invention belongs to the preparation of optical adhesive tape, and relates to a preparation method of optical transparent double-sided adhesive tape. The optically transparent substrate-free double-sided adhesive tape prepared by the invention is especially suitable for use as a touch panel. Background technique [0002] With the development of electronic products, the application of touch screens has become more and more extensive, and at the same time it has brought opportunities for the development of various raw materials. With the technological innovation of touch panels and the improvement of product performance requirements, traditional adhesive materials and bonding methods can no longer meet the needs of development. [0003] Initially considering the reworkability of the touch panel, that is to separate and reprocess the LCD screen and the touch screen, the laminating method adopted is to stick the LCD screen and the touch screen with do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J133/08C09J133/10C08F220/16C08F220/28C08F220/32B32B27/06B32B27/36
Inventor 王明刘洪乐许显成朱东海徐秀桃李明勇
Owner SICHUAN DONGFANG INSULATING MATERIAL
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