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High-reliability TP OCA (optically clear adhesive) tape, and preparation method thereof

A reliable and optical technology, applied in the direction of adhesives, grafted polymer adhesives, adhesive types, etc., can solve problems such as failure to meet reliability requirements, achieve high reliability requirements, and suppress air bubbles

Inactive Publication Date: 2018-11-06
SUZHOU FINESET MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] 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 no corrosion to ITO glass and optical components; but traditional OCA optical tape After pasting TP, the reliability requirements of 500h at 85°C and 500h at 85°C and 85%Rh cannot be met

Method used

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  • High-reliability TP OCA (optically clear adhesive) tape, and preparation method thereof
  • High-reliability TP OCA (optically clear adhesive) tape, and preparation method thereof
  • High-reliability TP OCA (optically clear adhesive) tape, and preparation method thereof

Examples

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preparation example Construction

[0039] The embodiment of the present invention also provides a preparation method of OCA optical adhesive tape for high reliability TP, comprising the following steps:

[0040] First, mix acrylate polymer, acrylate monomer, crosslinking agent, photoinitiator and auxiliary agent, specifically, mix acrylate polymer and acrylate monomer and then mix with crosslinking agent, Photoinitiators and additives are mixed. Now mix the acrylic polymer and acrylic monomer to prevent crosslinking agent, photoinitiator and auxiliary agent from affecting the formation of crosslinking between acrylic polymer and acrylic monomer, so as to ensure the OCA optical adhesive tape stability and cohesion.

[0041] Then, the mixture obtained by mixing the above-mentioned several substances is irradiated with ultraviolet light, so that the mixture reacts and solidifies to form an OCA optical adhesive tape. The use of ultraviolet radiation to cure the mixture simplifies the preparation steps, and no oth...

Embodiment 1

[0046] The high-reliability OCA optical tape for TP provided in this example includes 50 parts of acrylate polymer, 50 parts of acrylate monomer, 0.05 part of crosslinking agent, 0.5 part of photoinitiator and 0.2 part of auxiliary agent. Among them, the acrylate polymer is a copolymer obtained by polymerizing methacrylate compounds as monomers, and its molecular weight is above 800,000; the crosslinking agent is 1,6-hexanediol diacrylate; The initiator is 2,4,6-trimethylbenzoylphenylphosphine; 50 parts of acrylate monomers include 25 parts of isooctyl acrylate, 15 parts of hydroxyethyl acrylate and 10 parts of isobornyl acrylate; 0.2 parts of additives include 0.15 parts of antioxidant and 0.05 parts of light stabilizer.

[0047] The present embodiment also provides a method for preparing the OCA optical adhesive tape for this highly reliable TP as follows:

[0048] The acrylate polymer and the acrylate monomer are mixed and then mixed with a crosslinking agent, a photoiniti...

Embodiment 2-9

[0050] The components of the high-reliability OCA optical tapes for TP provided in Examples 2-9 are basically the same, the difference is that the ratio and specific raw materials are changed, and the specific selection is shown in Table 1.

[0051] Table 1 Raw material selection

[0052]

[0053]

[0054]

[0055] The preparation method of the high-reliability OCA optical tape for TP provided in Examples 2-9 is the same as the preparation method of the high-reliability OCA optical tape for TP provided in Example 1. The difference is that the operating conditions change. For specific operating conditions, see Table 2.

[0056] Table 2 Operating conditions

[0057]

[0058]

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Abstract

The invention belongs to the field of touch screen, and especially relates to a high-reliability TP OCA (optically clear adhesive) tape, and a preparation method thereof. The high-reliability TP OCA (optically clear adhesive) tape comprises, by weight, 50 to 70 parts of an acrylic polymer, 20 to 50 parts of an acrylic acid ester monomer, 0.05 to 0.5 part of a cross-linking agent, 0.5 to 0.8 part of a photoinitiator, and 0.2 to 0.4 part of an auxiliary agent. The high-reliability TP OCA (optically clear adhesive) tape is extremely high in molecular weight, possesses relatively high adhesion strength even at high temperatures, is capable of inhibiting bubbles generated between OCA and glass covers in high temperature reliability test, and satisfying higher reliability requirements.

Description

technical field [0001] The invention relates to the field of touch screens, and in particular to a high-reliability OCA optical adhesive tape for TP and a preparation method thereof. Background technique [0002] 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 no corrosion to ITO glass and optical components; but traditional OCA optical tape After pasting TP, the reliability requirements of 500h at 85°C and 500h at 85°C and 85%Rh cannot be met. Contents of the invention [0003] The purpose of the present invention is to provide a highly reliable OCA optical tape for TP, aiming to solve the above problems. [0004] Another object of the present invention is to provide a preparation method, the method is simple to operate, the operating conditions are easy to achieve, the preparation cost is low, and it is convenient to expand productio...

Claims

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Application Information

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IPC IPC(8): C09J7/10C09J7/30C09J151/00
CPCC09J7/10C09J7/30C09J151/003
Inventor 周玉波邹学良江华杨春强
Owner SUZHOU FINESET MATERIAL TECH CO LTD