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Incompletely cured OCA optical adhesive with multilayer structure and preparation method thereof

An incomplete and curing technology, applied in the field of optical adhesives, can solve problems such as unstable yield rate, difficult production process standards of TSP manufacturers, and easy flow.

Active Publication Date: 2018-12-28
新纶电子材料(常州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of product does not require the assembly manufacturer to add additional UV irradiation equipment, this type of product has some other shortcomings in practical use, such as easy flow during long-distance transportation, and external environmental factors such as seasonal changes that cause physical properties (curing Degree) changes, which makes it difficult for TSP manufacturers to set production process standards, and the yield rate is unstable

Method used

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  • Incompletely cured OCA optical adhesive with multilayer structure and preparation method thereof

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Embodiment 1

[0024] The preparation method of the incompletely cured type OCA optical adhesive of a kind of multi-layer structure of the present embodiment, comprises the following steps:

[0025] Step 1: Preparation of OCA coating solution

[0026] In parts by weight, 650 parts of 2-ethylhexyl acrylate, 15 parts of isobornyl acrylate, 20 parts of 2-hydroxyethyl acrylate and 0.01 part of 1-hydroxycyclohexyl benzophenone as photoinitiator Prepare a monomer premix, and partially polymerize the mixture by exposing it to ultraviolet radiation under a nitrogen-protected environment, so as to obtain a prepolymer with a viscosity of 300 centipoise; Add 1-hydroxycyclohexylbenzophenone, 1,6-hexanediol diacrylate, and trimethylolpropane triacrylate at 0.1%, 0.1%, filter with 480-mesh filter cloth after stirring for 10 minutes, and vacuum for 20 minutes Afterwards, the OCA coating solution is prepared;

[0027] Step 2: Preparation of fully cured first OCA layer

[0028] Pour the OCA coating liquid...

Embodiment 2

[0035] The preparation method of the incompletely cured type OCA optical adhesive of a kind of multi-layer structure of the present embodiment, comprises the following steps:

[0036] Step 1: Preparation of OCA coating solution

[0037] In parts by weight, 650 parts of 2-ethylhexyl acrylate, 15 parts of isobornyl acrylate, 20 parts of 2-hydroxyethyl acrylate and 0.01 part of 1-hydroxycyclohexyl benzophenone as photoinitiator Prepare a monomer premix, and partially polymerize the mixture by exposing it to ultraviolet radiation under a nitrogen-protected environment, so as to obtain a prepolymer with a viscosity of 300 centipoise; Add 1-hydroxycyclohexylbenzophenone, 1,6-hexanediol diacrylate, trimethylolpropane triacrylate at 0.1%, 0.1%, filter with 480-mesh filter cloth after stirring for 40 minutes, and vacuum for 60 minutes Afterwards, the OCA coating solution is prepared;

[0038] Step 2: Preparation of fully cured first OCA layer

[0039] Pour the OCA coating solution bet...

Embodiment 3

[0046] The preparation method of the incompletely cured type OCA optical adhesive of a kind of multi-layer structure of the present embodiment, comprises the following steps:

[0047] Step 1: Preparation of OCA coating solution

[0048] In parts by weight, 650 parts of 2-ethylhexyl acrylate, 15 parts of isobornyl acrylate, 20 parts of 2-hydroxyethyl acrylate and 0.01 part of 1-hydroxycyclohexyl benzophenone as photoinitiator Prepare a monomer premix, and partially polymerize the mixture by exposing it to ultraviolet radiation under a nitrogen-protected environment, so as to obtain a prepolymer with a viscosity of 300 centipoise; Add 1-hydroxycyclohexylbenzophenone, 1,6-hexanediol diacrylate, trimethylolpropane triacrylate at 0.1%, 0.1%, filter with 480-mesh filter cloth after stirring for 30 minutes, and vacuum for 50 minutes Afterwards, the OCA coating solution is prepared;

[0049] Step 2: Preparation of fully cured first OCA layer

[0050] Pour the OCA coating solution b...

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Abstract

The invention discloses an incompletely cured OCA optical adhesive with a multilayer structure and a preparation method thereof. An completely cured first OCA layer and an incompletely cured second OCA layer are composited, the incompletely cured second OCA layer laminates a cover plate glass to meet the filling of an ink section difference, the completely cured first OCA layer is used to improvethe overall cohesion, and the excellent die cutting property is met to adapt to weather changes in various seasons, and various problems in the transportation process are solved. The incompletely cured OCA optical adhesive is a low-elasticity product, but has different physical properties, and has die-cutting stability and environmental adaptability which are not possessed by a single-layer product in use and preservation. According to the incompletely cured OCA optical adhesive, the problem of interface bonding force between multi-layer structure OCAs is solved at the same time, and it is ensured that the incompletely cured OCAs with the multilayer structure are not subjected to layering and the like when an adherend is attached to the incompletely cured OCAs before or after the curing.

Description

technical field [0001] The invention belongs to the technical field of optical glue, and in particular relates to a multi-layer structure incompletely cured OCA optical glue and a preparation method thereof. Background technique [0002] Recently, in the TSP (Touch screen panel) assembly process applied to smartphones and tablet computers, the tempered glass cover plate appears in many colors, which leads to an increase in the printing process of the ink on the tempered glass, and the corresponding step difference also increases. In order to overcome the increasingly thickened ink step layer, many soft OCA (Optical clearadhesive) products have appeared in the market. Although this type of product can overcome the ink level difference of the cover glass on the market, the soft chemical structure of the colloid of OCA itself will cause other instability in physical properties during use. [0003] In order to overcome the above problems, manufacturers such as Mitsubishi Plasti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C09J4/06C09J7/40
CPCC09J4/06C09J2203/318C09J7/403
Inventor 刘晓阳
Owner 新纶电子材料(常州)有限公司
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