Frame sealant composition, liquid crystal pollution prevention method, liquid crystal display panel and display device

A frame sealing glue and composition technology, which is applied in the direction of sealing devices, chemical instruments and methods, non-polymer organic compound adhesives, etc., can solve the problems of ineffective anchoring of thermally polymerized monomers, liquid crystal pollution, etc., and achieve Effects of avoiding yellowing and unevenness, reducing contamination, and enhancing anchoring effect

Inactive Publication Date: 2012-10-03
BEIJING BOE OPTOELECTRONCIS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, during the ultraviolet polymerization process of the existing sealants, the polymers generated by the polymerization of the ultraviolet double bond polymerizable monomers through the photoinitiator are mostly chains, which cannot effectively anchor the thermally polymerizable monomers, and there are still a few Part of the thermally polymerized monomer diffuses into the liquid crystal, causing pollution to the liquid crystal

Method used

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  • Frame sealant composition, liquid crystal pollution prevention method, liquid crystal display panel and display device
  • Frame sealant composition, liquid crystal pollution prevention method, liquid crystal display panel and display device
  • Frame sealant composition, liquid crystal pollution prevention method, liquid crystal display panel and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Example 1: Frame sealant 1

[0080] a) 20 parts by weight of ultraviolet double bond polymerizable monomer (ethyl acrylate), 15 parts by weight of thermally polymerizable monomer (ethylene glycol diglycidyl ether), 7 parts by weight of polymerizable oligomer (polyethylene Diol diacrylate, containing 2 C-C double bonds, molecular weight 2500), 0.1 parts by weight of photoinitiator (dibenzoyl peroxide) and 10 parts by weight of thermosetting agent (1,8-diamino-3, 6-dioxa-octane) to obtain a homogeneous mixture, and put the above mixture into a defoamer for 1 h in the dark;

[0081] b) uniformly coating the mixture obtained in step a) on the color filter substrate, and then filling the color filter substrate and the array substrate with liquid crystals and aligning the cells to obtain a liquid crystal display panel;

[0082] c) Use ultraviolet light to irradiate the liquid crystal display panel, wherein the wavelength of ultraviolet light is 350nm, the irradiation time of...

Embodiment 2

[0084] Example 2: Frame sealant 2

[0085] a) 21 parts by weight of ultraviolet double bond polymerizable monomer (methyl acrylate), 16.5 parts by weight of thermally polymerizable monomer (ethylene glycol diglycidyl ether), 5 parts by weight of polymerizable oligomer (polyethylene Diol diacrylate, containing 2 C-C double bonds, molecular weight 3000), 0.5 parts by weight of photoinitiator (lauroyl peroxide), 12 parts by weight of thermosetting agent (1,8-diamino-3,6 - dioxoctane) and 2 parts by weight of the particle additive (silicon dioxide) are mixed to obtain a homogeneous mixture, and the mixture is put into a defoamer for 1.5 hours of light-shielding defoaming treatment;

[0086] b) uniformly coating the mixture obtained in step a) on the color filter substrate, and then filling the color filter substrate and the array substrate with liquid crystals and aligning the cells to obtain a liquid crystal display panel;

[0087] c) Irradiate the liquid crystal display panel w...

Embodiment 3

[0089] Example 3: Frame sealant 3

[0090] a) 23 parts by weight of ultraviolet double bond polymerizable monomer (methyl methacrylate), 15 parts by weight of thermally polymerizable monomer (ethylene glycol diglycidyl ether), 10 parts by weight of polymerizable oligomer ( Polyethylene glycol diacrylate, containing 2 C-C double bonds, molecular weight 2000), 1 weight part of photoinitiator (azobisisobutyronitrile), 13 weight parts of thermosetting agent (1,8-diamino- 3,6-dioxa-octane) and 5 parts by weight of granular additives (silicon dioxide) were mixed to obtain a homogeneous mixture, and the above-mentioned mixture was put into a defoamer for 2 h in the dark;

[0091] b) uniformly coating the mixture obtained in step a) on the array substrate, then filling the color filter substrate and the array substrate with liquid crystals and aligning the cells to obtain a liquid crystal display panel;

[0092]c) Irradiate the liquid crystal display panel with ultraviolet light, whe...

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Abstract

The invention provides frame sealant composition, a liquid crystal display unit and a liquid crystal pollution prevention method using the frame sealant composition. The frame sealant composition comprises, by weight, 20-30 parts of ultraviolet double-bond polymeric monomer, 15-20 parts of thermally polymerized monomer, 5-20 parts of polymerizable oligomer, 0.1-5 parts of optical initiator, 10-20 parts of thermal curing agent and 0-20 parts of granulated additive. The polymerizable oligomer is polyethyleneglycol diacrylate or derivatives thereof. The polymerizable oligomer reacts with polymer of the ultraviolet double-bond polymeric monomer to generate network high polymer, and accordingly anchorage of the network high polymer on surrounding unreacted thermally polymerized monomers is enhanced effectively, and pollution of liquid crystal by the frame sealant is reduced.

Description

technical field [0001] The invention relates to a liquid crystal display (LCD) manufacturing technology, in particular to the design of a frame sealant in a liquid crystal display, a liquid crystal display device and a method for preventing liquid crystal pollution by using the frame sealant. Background technique [0002] In the production process of the liquid crystal display panel, after the color filter (CF) substrate and the array (Array) substrate are boxed together, liquid crystal is filled between the color filter substrate and the array substrate, and the periphery is sealed with glue. This glue is the sealing glue. . Commonly used frame sealants mainly include ultraviolet double bond polymerizable monomers, thermal polymerizable monomers, photoinitiators, thermal curing agents, and particle additives. [0003] Commonly used frame sealants are cross-linked by stepwise polymerization. First of all, ultraviolet polymerization is carried out. In this process, the phot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02G02F1/1339
CPCC09K3/10C09J133/062C09J4/06C08F220/18C08F222/1006C09K2003/1062C09K2200/0625G02F1/1339C09J133/04C09D133/14C08F220/1802C08F220/1803C08F220/1804C08F222/102C09K2323/05C09K2323/059C08L33/04B32B2457/202
Inventor 郭仁炜陈东
Owner BEIJING BOE OPTOELECTRONCIS TECH CO LTD
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