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Acid-free OCA and adhesive belt and fabrication method of acid-free OCA and adhesive belt

A technology of optical glue and tape, applied in the direction of adhesives, adhesive types, film/sheet adhesives, etc., can solve the problems of easy warping of edges, poor followability of sticking, and poor control of thickness, etc. , to achieve the effect that the edge is not easy to warp, the sticking followability is excellent, and the thickness is easy to control

Active Publication Date: 2015-02-04
NINGBO SOKEN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The liquid optical adhesive (LOCA) currently on the market is not easy to control the thickness, so it is easy to generate bubbles when curing shrinkage
And easy to cause pollution, inconvenient to operate
[0004] In addition, there are optically transparent double-sided adhesives with substrates, but there are also disadvantages such as poor sticking followability and easy warping of the edges.
[0005] In addition, generally used optical OCAs are acid or weak acid series, which are easy to cause corrosion to ITO glass and optical components

Method used

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  • Acid-free OCA and adhesive belt and fabrication method of acid-free OCA and adhesive belt
  • Acid-free OCA and adhesive belt and fabrication method of acid-free OCA and adhesive belt
  • Acid-free OCA and adhesive belt and fabrication method of acid-free OCA and adhesive belt

Examples

Experimental program
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Effect test

Embodiment

[0042] a. Ordinary acrylic adhesive

[0043] a (1) Take 100 parts of acrylate adhesive NS-68 (provided by Ningbo Zongyan Chemical Co., Ltd.), and choose a homopolymer of 2-ethylhexyl acrylate (2-EHA) for the acrylate polymer , Viscosity: 60-120mPa.s, solid content 37%, molecular weight 3.1 million, glass transition temperature -40 ℃.

[0044] a (2) Take 100 parts of acrylate adhesive SK-2094 (provided by Japan Soken Chemical Co., Ltd.), and choose butyl acrylate (BA) and 2-hydroxyethyl methacrylate for the acrylate polymer (2-HEMA) and acrylic acid (AA) copolymer, viscosity: 30-50mPa.s, solid content 25%, molecular weight 2 million, glass transition temperature -60°C

[0045] a(3) Take 100 parts of acrylate adhesive NS-17 (provided by Ningbo Zongyan Chemical Co., Ltd.), and select ethyl acrylate (EA), methyl methacrylate (MMA) and Malay Acid copolymer, viscosity: 70-140mPa.s, solid content 39%, molecular weight 5 million; glass transition temperature -30℃.

[0046] a(4) Tak...

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Abstract

The invention relates to an acid-free OCA (optical clear adhesive), an adhesive belt and a fabrication method of the acid-free OCA and the adhesive belt. The OCA comprises the following components in parts by weight: 100 parts of acrylate adhesive, 0.1-4.5 parts of soluble organometallic complex, 0.1-25.0 parts alkalescent antacid, 0.01-0.3 part of epoxy curing agent, and 0.01-0.5 part of antioxidant. Compared with the prior art and compared with the liquid OCA, the thickness of the prepared OCA is easy to control, the prepared OCA does not cause pollution easily and is convenient to operate when serving as a pressure sensitive adhesive; the adhesive belt has the advantages that the adhesive belt is excellent in adhesive following performance, and an edge does not raise easily. The adhesive belt is simple in production process, low in production cost and excellent in performance.

Description

technical field [0001] The invention relates to the field of acrylate pressure-sensitive adhesives, in particular to an acid-free OCA optical adhesive, an acid-free OCA optical adhesive tape and a preparation method thereof. Background technique [0002] In recent years, the development of touch screens is extremely rapid. With the increasing number of multimedia information inquiries, people are using more and more touch screens. Acid-free optical OCA is colorless and transparent, has a light transmittance of more than 90%, and has good bonding strength. It can be cured at room temperature or medium temperature, and has the advantages of small curing shrinkage and no yellowing, especially for ITO glass and Optical components are non-corrosive, so they are widely used in the touch screen industry due to their excellent physical and chemical properties. [0003] The liquid optical adhesive (LOCA) currently on the market is not easy to control the thickness, so it is easy to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/08C09J133/10C09J7/02
Inventor 刘章伟王旭辉莫世杰
Owner NINGBO SOKEN CHEM
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