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A kind of incomplete curing type oca optical adhesive of multi-layer structure and preparation method thereof

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

Active Publication Date: 2021-07-16
新纶电子材料(常州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of incomplete curing type oca optical adhesive of multi-layer structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

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 multi-layer structure and a preparation method thereof. The fully cured first OCA layer and the incompletely cured second OCA layer are combined, and the incompletely cured second OCA layer To fit the cover glass, meet the filling of the ink step difference, fully cured the first OCA layer to improve the overall cohesion, meet the excellent die-cutting performance, adapt to the weather changes in various seasons, and various problems during transportation. The present invention is a product with low elastic modulus, but has different physical properties, and has die-cutting stability and environmental adaptability that single-layer products do not have in use and storage; The problem of interfacial bonding force ensures that the incompletely cured OCA of the multi-layer structure of the present invention will not delaminate after being attached to the adherend before and after 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 Patents(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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