Adhesive composition for controlling light leakage and optical film coated with the same for display device

A display device, composition technology, applied in optics, adhesive type, nonlinear optics, etc., can solve problems such as adhesive flow or contamination

Inactive Publication Date: 2010-06-16
TORAY SAEHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can reduce shrinkage stress, but causes adhesive flow or contamination on the cut portion when cutting the polarizing plate, thereby causing serious problems in processability and applying the plate to related products

Method used

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  • Adhesive composition for controlling light leakage and optical film coated with the same for display device
  • Adhesive composition for controlling light leakage and optical film coated with the same for display device
  • Adhesive composition for controlling light leakage and optical film coated with the same for display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0085] Examples 1-6: Production of acrylic copolymers

[0086] For Examples 1-6, at first, n-butyl acrylate, methyl acrylate, acrylic acid and (meth)acrylic acid as polymerized monomers are provided to the reaction chamber in the following Table 1 in the content (the unit is "parts by weight") 4-hydroxybutyl ester; 100 g of ethyl acetate as a solvent; and azobisisobutyronitrile (AIBN) as a polymerization initiator.

[0087] After replacing the air in the reaction chamber with nitrogen, the mixture was stirred while raising the temperature of the mixture to 63° C., and then polymerized for the reaction time shown in Table 1 below. After the polymerization reaction, the resulting mixture was diluted with 100 g of ethyl acetate to obtain a solid acrylic copolymer liquid. In the polymer liquid, after measuring the initial weight of the binder and then evaporating the solvent at 100° C. for 30 minutes, the weight of the solid was measured by a solid measuring machine. The molecul...

Embodiment 7～14

[0097] Examples 7-14: Production of polarizing plate coated with adhesive composition

[0098] The polymers obtained in Examples 1 to 6 were mixed at the mixture ratio (in "g") shown in Table 3 below, and 0.2 g of trimethylhexamethylenediamine solid was added to the mixture as an exchange. agent and stirred to obtain an adhesive composition for manufacturing a polarizing plate. The adhesive composition for producing polarizing plates thus obtained was coated on a polyester release film and the resulting coated film was dried. In this case, the coating was controlled to be 25 μm thick after drying. Subsequently, the adhesive composition coated on the release film was transferred to a 200 μm polarizing film to obtain a polarizing plate of the present invention after aging at a temperature of 23° C. and a humidity of 45% for 7 days.

[0099] The polarizing plate provided with the adhesive layer was cut into a size of 210 mm×297 mm such that the absorption axis remained at 45° w...

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Abstract

The present invention relates to an adhesive composition used for controlling light leakage and an optical film coated with the same for display device. The adhesive composition can reduce the contraction stress of adhesive for supplementing light leakage property and minimizing the residual stress caused by the dimension change of the substrate of the optical film and the adhesive. Therefore, the adhesive composition comprises the following components: (A) reactive high molecular weight acrylic acid copolymer with weight-average molecular weight of 2,000,000-2,500,000; (B) reactive middle molecular weight acrylic acid copolymer with weight-average molecular weight of 1,500,000-2,000,000; (C) reactive low molecular weight acrylic acid copolymer with weight-average molecular weight of 100,000-500,000; and (D) crosslinking agent. The invention is characterized in that the high modular weight, the middle modular weight and the low modular weight acrylic acid copolymers are the reactive copolymers polymerized by the following substances: (a) 90-99.9 parts by weight of alkyl acrylate with the alkyls with 4-12 carbon atoms; and (b) 0.1-10 parts by weight of vinyl monomer with the functional groups which can crosslink with the crosslinking agent.

Description

technical field [0001] The present invention relates to an adhesive composition for controlling light leakage and an optical film for a display device coated with the composition, and more particularly, the present invention relates to properties that can supplement light leakage by relieving shrinkage stress of an adhesive Adhesive composition for controlling light leakage which can minimize residual stress due to difference between dimensional changes of base of optical film and adhesive, and display coated with the composition Optical film of the device. Background technique [0002] Recently, adhesives for optical films requiring various advanced functions and reliable durability have been used. In particular, adhesives for attaching polarizing films to substrates used in liquid crystal cells are subjected to even harsher conditions for their application. In such conditions, the polarizing film has dimensional changes that may cause blistering, peeling or light leakage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/06G02B5/30G02F1/1335
CPCC08K5/54C09J9/00C09J11/06C09J133/08G02B5/30G02F1/13
Inventor 崔圭夏李文馥徐正泰严相烈
Owner TORAY SAEHAN
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