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Preparation method of optical adhesive, liquid optical adhesive and curved-screen optical tape

A technology of optical adhesive and photoinitiator, which is applied in the directions of adhesives, non-polymer organic compound adhesives, pressure-sensitive films/sheets, etc., can solve the problems such as the inability to meet the bonding requirements of curved touch screens, and achieves a simple and easy preparation method. , high reliability requirements, the effect of suppressing air bubbles

Inactive Publication Date: 2018-05-18
SUZHOU FINESET MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with the emergence of curved touch screens in recent years, traditional OCA cannot meet the bonding requirements of curved touch screens

Method used

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  • Preparation method of optical adhesive, liquid optical adhesive and curved-screen optical tape
  • Preparation method of optical adhesive, liquid optical adhesive and curved-screen optical tape
  • Preparation method of optical adhesive, liquid optical adhesive and curved-screen optical tape

Examples

Experimental program
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preparation example Construction

[0032] The embodiment of the present invention also provides a method for preparing a liquid optical adhesive, which includes the following steps: stirring the raw materials of the above-mentioned optical adhesive at a temperature of 30-50° C. for 2-6 hours. During the stirring process, the rotation speed can be controlled between 20-600r / min. The stirring time can be selected according to the stirring speed and the stirring amount. After the stirring is completed, the vacuum is drawn, and the uncured adhesive product can be obtained after standing still after the vacuum is drawn.

[0033] Also in other embodiments, the optical adhesive formula provided by the present invention can also be mixed and cured to obtain an optical adhesive tape. Specifically, the embodiment of the present invention also provides a method for preparing an optical adhesive tape with a curved screen, which includes the following steps: stirring the raw materials of the above optical adhesive at a tempe...

Embodiment 1

[0037] The formula of the optical adhesive in Examples 1-9 is as follows, such as the optical adhesive provided in Example 1, in parts by weight, including 30 parts of acrylic acid derivative polymer, 25 parts of isooctyl acrylate (EHA), 25 parts of acrylic acid 25 parts of hydroxybutyl ester (4HBA), 20 parts of isobornyl methacrylate (IBOMA), 0.05 parts of photoinitiator (0.05 parts of 1-hydroxycyclohexyl phenyl ketone 184 and 2,4,6-trimethylbenzene Formyl diphenylphosphine oxide TPO 0 part) 0.05 part and crosslinking agent (tripropylene glycol diacrylate TPGDA) 0.01 part.

[0038]

[0039] Other information about the optical adhesive formula in Examples 1-9 and the preparation method of the curved screen optical adhesive tape will be specifically introduced below.

[0040] Example 1

[0041] This embodiment provides an optical adhesive, wherein the molecular weight of the acrylic acid derivative polymer is about 20w.

[0042] This embodiment also provides a method for p...

Embodiment 2

[0045] This embodiment provides an optical adhesive, wherein the molecular weight of the acrylic acid derivative polymer is about 80w.

[0046] This embodiment also provides a method for preparing an optical adhesive tape with a curved screen, which includes the following steps:

[0047] Add the raw materials corresponding to Example 2 in the table into the stirred tank, heat to 50°C, and stir for 2 hours at a speed of 300r / min to obtain a uniform adhesive fluid; then, use a conventional method to coat the adhesive fluid After being clothed, it is cured and shaped under ultraviolet radiation with a wavelength of 320-420nm.

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Abstract

The invention discloses a preparation method of an optical adhesive, a liquid optical adhesive and curved-screen optical tape and relates to the field of optical display. The optical adhesive comprises acrylic acid derivative polymer, acrylic acid derivative monomer and a photoinitiator, wherein the molecular weight of the acrylic acid derivative polymer is 20w-80w, and the acrylic acid derivativemonomer comprises Isobornyl methacrylate. The optical adhesive is high in adhesive force, high in adhesive force under high temperature, capable of inhibiting the generation of bubbles between the adhesive and a curved screen under high temperature and capable of satisfying high reliability requirements. The preparation method has the advantages that the method is simple and practicable, and theobtained products are applicable to the curved screen and high in high-temperature reliability.

Description

technical field [0001] The invention relates to the field of optical display, and in particular to a preparation method of optical adhesive, liquid optical adhesive and curved screen optical adhesive tape. Background technique [0002] OCA (Optically Clear Adhesive) is a special adhesive used to bond transparent optical components (such as lenses, etc.). Traditional OCA optical tape has the advantages of colorless and transparent, light transmittance above 90%, good bonding strength, small curing shrinkage, no yellowing, etc., especially non-corrosive to ITO glass and optical components. [0003] However, with the emergence of curved touch screens in recent years, traditional OCAs cannot meet the bonding requirements of curved touch screens. Contents of the invention [0004] The object of the present invention is to provide an optical adhesive, which aims at improving the adhesion effect of the adhesive to the curved touch screen and improving the bonding performance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C09J4/06C09J7/38
CPCC09J4/06C09J2203/318C09J2301/302C09J2301/414C09J2433/00
Inventor 周玉波岡崎哲也澤登纯一邹学良江华潘宇
Owner SUZHOU FINESET MATERIAL TECH CO LTD
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