UV (ultraviolet) solvent-free OCA (optical clear adhesive) with high adhesion as well as preparation method and application of UV solvent-free OCA

An adhesive and solvent-free technology, applied in the field of OCA optical adhesive, can solve the problems of insufficient bonding strength of OCA optical adhesive, and achieve the effects of reduced friction, no VOC emission, and simple preparation process

Pending Publication Date: 2022-04-26
GUANGZHOU LUSHAN PHOTOVOLTAIC MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide UV solvent-free OCA optical glue with strong adhesion, to solve the technical problems such as insufficient bonding strength of OCA optical glue existing in the prior art

Method used

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  • UV (ultraviolet) solvent-free OCA (optical clear adhesive) with high adhesion as well as preparation method and application of UV solvent-free OCA
  • UV (ultraviolet) solvent-free OCA (optical clear adhesive) with high adhesion as well as preparation method and application of UV solvent-free OCA

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preparation example Construction

[0058] The present invention also provides a preparation method of any one of the above-mentioned strong adhesive UV solvent-free OCA optical adhesives, comprising the following steps:

[0059] Mix the components in proportion and perform UV curing.

[0060] In a specific embodiment of the present invention, the conditions of the ultraviolet curing include: wavelength 280-420nm, energy 500-5000mJ / cm 2 .

[0061] As in different embodiments, the wavelength of the UV curing can be 280nm, 300nm, 320nm, 340nm, 350nm, 360nm, 380nm, 400nm, 420nm, etc.; the energy can be 500mJ / cm 2 , 1000mJ / cm 2 、1500mJ / cm 2 、2000mJ / cm 2 、2500mJ / cm 2 、3000mJ / cm 2 、3500mJ / cm 2 、4000mJ / cm 2 、4500mJ / cm 2 、5000mJ / cm 2 wait.

[0062] In a specific embodiment of the present invention, after mixing the components in proportion, coating is performed to form a film, and then UV curing is performed. Further, the film thickness of the OCA optical glue is 25-400 μm.

[0063] In actual operation, the...

Embodiment 1

[0066] This embodiment provides a strong adhesive UV solvent-free OCA optical adhesive, which is mainly prepared from the following components in parts by weight:

[0067] 50 parts of epoxy acrylate Miamer PE110, 20 parts of aliphatic urethane acrylate oligomer SARTOMERCN965NS, 30 parts of ethylene glycol dimethacrylic acid, 1.5 parts of methyl benzoylformate, 0.3 parts of vinyltriethoxysilane and 0.6 part Lauryl acrylate (highly branched) from Mitsubishi Chemical.

[0068] The preparation method of above-mentioned OCA optical glue, comprises the steps:

[0069] After mixing the above-mentioned components in proportion to prepare a uniform mixed solution, after coating to form a film, it was cured by an ultraviolet lamp to obtain an OCA optical adhesive with a film thickness of 175 μm. Among them, the wavelength of UV lamp curing is 280-420nm, and the energy is 500mJ / cm 2 .

Embodiment 2

[0071] This embodiment provides a strong adhesive UV solvent-free OCA optical adhesive, which is mainly prepared from the following components in parts by weight:

[0072] 48 parts of epoxy acrylate Miamer PE2235, 25 parts of aliphatic urethane acrylate oligomer SARTOMERCN966H90NS, 27 parts of 1,6-hexanediol diacrylate, 0.6 parts of 2-hydroxy-2-methylphenylpropane-1- Ketone, 0.5 part dimethyldimethoxysilane and 0.9 part tridecyl acrylate (highly branched) from Mitsubishi Chemical.

[0073] The preparation method of above-mentioned OCA optical glue, comprises the steps:

[0074] After mixing the above-mentioned components in proportion to prepare a uniform mixed solution, after coating to form a film, it was cured by an ultraviolet lamp to obtain an OCA optical adhesive with a film thickness of 175 μm. Among them, the wavelength of UV lamp curing is 280-420nm, and the energy is 800mJ / cm 2 .

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Abstract

The invention relates to the technical field of OCA optical cement, in particular to UV solvent-free OCA optical cement with high adhesion and a preparation method and application thereof. The invention relates to a strong-adhesion UV (ultraviolet) solvent-free OCA (optical clear adhesive). The strong-adhesion UV solvent-free OCA is mainly prepared from the following components in parts by weight: 10 to 55 parts of epoxy acrylate, 5 to 30 parts of aliphatic polyurethane acrylate oligomer, 10 to 40 parts of multifunctional acrylic monomer, 0.2 to 2 parts of photoinitiator, 0.3 to 1.5 parts of silane coupling agent and 0.6 to 3 parts of long-chain acrylate. According to the invention, long-chain acrylate is introduced into the OCA optical cement, so that on the basis of not influencing the bonding performance and high light transmittance characteristic of the OCA optical cement, the three-dimensional macromolecular structure of the OCA optical cement is improved, the bonding performance is improved, meanwhile, the friction between molecules is reduced, the fluidity is improved, and the defoaming in the bonding process of touch screen components is facilitated.

Description

technical field [0001] The invention relates to the technical field of OCA optical glue, in particular to a strong adhesive UV solvent-free OCA optical glue, a preparation method and application thereof. Background technique [0002] From top to bottom, the touch screen mainly includes three parts: protective glass, touch screen and display screen. These three parts need to be bonded with glue, between the protective glass and the touch screen, and between the touch screen and the display screen. OCA optical glue is widely used in the lamination of touch screens because of its colorless and transparent, light transmittance of more than 90%, curing at room temperature or medium temperature, and small curing shrinkage. [0003] As an OCA optical glue for bonding protective glass, touch screen and display screen, its adhesive strength directly affects the service life and appearance of touch screen components. In order to improve the adhesive force, a hydrogen bond-containing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/10C09J175/14
CPCC09J163/10C08L2205/025C08L2205/035C08L2203/20C08L75/14C08L63/10
Inventor 阳志荣郑超韩丽娜唐舫成汪加胜
Owner GUANGZHOU LUSHAN PHOTOVOLTAIC MATERIAL CO LTD
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