OCA optical adhesive tape and making method thereof

A technology of optical glue, synthesis method, applied in the direction of adhesive, adhesive type, film/sheet adhesive, etc.

Inactive Publication Date: 2014-02-19
常熟市富邦胶带有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no universal principle for how to properly select an adhesive, and there is no such adhesive as "universal glue" f

Method used

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  • OCA optical adhesive tape and making method thereof

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0016] Experimental example 1 Synthesis of polyurethane acrylate prepolymer

[0017] The present invention selects polyethylene glycol, toluene diisocyanate (TDI), hydroxyethyl methacrylate (HEMA), butyltin dilaurate, hydroquinone and butyl acrylate as raw materials for synthesizing polyurethane acrylate prepolymer. Among them, polyethylene glycol provides the molecular structure of the soft segment, which provides flexibility for the overall performance of the polyurethane acrylate prepolymer. TDI provides the molecular structure of the hard segment and contributes to the performance of polyurethane. HEMA is the prepolymer end cap and introduces double bonds into the molecular chain. Butyl tin dilaurate is used as the positive catalyst for the product, p-diphenol is used as the polymerization inhibitor, and butyl acrylate is used as the catalyst. The ester acts as a solvent, controls the viscosity of the system, and can be cured in the formulation.

[0018] Synthetic formula...

experiment example 2

[0029] Experimental example 2 Production of OCV optical tape.

[0030] OCV optical adhesive formula: urethane acrylate prepolymer synthesized in Experimental Example 1: 100; compounding agent: 2; initiator: 5; accelerator: 2; co-accelerator: 0.3; stabilizer: 0.01.

[0031] Wherein, the compounding agent is acrylic acid, the initiator is cumene peroxide, the accelerator is triethylamine, the auxiliary accelerator is saccharin, and the stabilizer is benzoquinone.

[0032] The adhesive mixture prepared according to the adhesive formula of this experimental example is coated on the layer of the heavy peeling PET release film, and the thickness is controlled at 0.05 mm plus or minus 0.003 mm. Dry at 80°C for 5 minutes, then lightly peel off the PET release film and stick it on the surface, and then place it in an oven at 50°C for 2 days to obtain the OCA optical tape sample.

[0033] The performance of the optical tape produced by the test is described in the following table:

[...

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PUM

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Abstract

The invention mainly relates to an OCA optical adhesive tape and a making method thereof. The OCA optical adhesive tape sequentially comprises a light-peel PET release film layer, an optical adhesive layer and a heavy-peel PET release film layer from top to bottom, and the optical adhesive layer comprises, by weight, 100 parts of a polyurethane acrylate prepolymer, 2 parts of a compounding agent, 5 parts of an initiator, 2 parts of an accelerant, 0.3 parts of an accelerant aid and 0.01 parts of a stabilizer. The invention further relates to a making method of the polyurethane acrylate prepolymer. The OCA optical adhesive tape has a good bond property to various polar and non-polar materials comprising inorganic glass, organic plastic sheets, metals and the like.

Description

technical field [0001] The invention mainly relates to an optical adhesive tape, in particular to an OCA optical adhesive tape and a manufacturing method thereof. Background technique [0002] The optical adhesive of COA optical tape is a special adhesive used for bonding transparent optical components. With the characteristics of small curing shrinkage, it is mainly used for the bonding of ITO film, electronic paper, transparent devices, projection screen assembly, display assembly, lens assembly, resistive touch screen, capacitive touch screen, panel and other related electronic optical devices. Due to the different raw materials used, or the different preparation and measurement of the same raw materials, there are many kinds of optical adhesives. The main materials used to prepare optical adhesives are: silicone rubber, polyurethane, epoxy resin, acrylic resin and unsaturated resin. When preparing polyester, etc., some auxiliary materials are usually added to improve i...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/67C08G18/10C09J175/14C09J7/00
CPCC08G18/7614C08G18/12C08G18/4825C08G18/672C09J7/00C09J175/14C09J2475/00
Inventor 沈阳
Owner 常熟市富邦胶带有限责任公司
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