Acrylic resin

A technology of acrylic resin and monomer, applied in the direction of epoxy resin glue, synthetic resin layered products, N-vinylpyrrolidone copolymer adhesive, etc., can solve the problem of uneven distribution of residual stress, light leakage, and TN liquid crystal cells Light leakage and other issues

Inactive Publication Date: 2005-08-31
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under heating or moistening and heating conditions, the distribution of residual stress acting on the optical laminate film becomes non-uniform, and stress concentration occurs around the peripheral portion of the optical laminate, so there is a problem that, in TN liquid crystal cells Light leakage in (TFT)
[0004] However, there is a problem that liquid crystal cells obtained by using an optical laminate having an adhesive layer mainly composed of an acrylic resin having a structural unit derived from N-vinylpyrrolidone Light leakage occurs when stored under wet and heated conditions

Method used

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  • Acrylic resin
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0127]

[0128] To 100 parts of the solid component in the ethyl acetate solution of the acrylic resin obtained in the above-mentioned Polymerization Example 1 was mixed a polyisocyanate-based compound (trade name: Coronate L, manufactured by Nippon Polyurethane, The solid content is 0.5 parts) and γ-glycidoxypropyltrimethoxysilane (0.2 parts) as a silyl compound.

[0129]

[0130] Using an applicator, the obtained adhesive was applied on the peel-treated surface of a polyethylene terephthalate film (manufactured by Rintech, trade name: PET 3811) that had been peeled, so that it was dried After a thickness of 25 micrometers and drying at 90° C. for 1 minute, an adhesive in the form of a sheet was obtained. Then, a polarizing film (a film having a three-layer structure obtained by absorbing iodine in polyvinyl alcohol and stretching it and sandwiching it with triacetylcellulose-based substrate films on both surfaces thereof) was used as An optical film, and the surface wit...

Embodiment 2-6 and comparative example 1-3

[0153] Adhesives and optical laminates were produced in the same manner as in Example 1, except that the acrylic resin used and the added parts of the crosslinking agent were varied. Table 1 summarizes the evaluation results of the obtained acrylic resin and optical laminate. In Comparative Examples 1, 2, and 3, adhesives and optical laminates were produced in the same manner as in Example 1, except that the acrylic resins of Examples 4, 5, and 6 were polymerized, respectively. Table 1 summarizes the evaluation results of the obtained acrylic resins and optical laminates.

[0154] Example

[0155] * 1: Viscosity at 25°C and 30wt% resin concentration

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Abstract

The acrylic resin can be obtained by copolymerizing (a), (b), (c) and (d). (a): a (meth)acrylate represented by formula (1), wherein R1denotes hydrogen atom or methyl group; R2denotes a 1-14C alkyl group or aralkyl group. (b): a monomer containing at least two groups represented by formula (2) in the molecule, wherein R3denotes hydrogen atom or methyl group. (c): a monomer containing a heterocycle and one olefinic double bond in the molecule. (d): a monomer containing at least one polar functional group and one olefinic double bond in the molecule.

Description

technical field [0001] This invention relates to acrylic resins. Background technique [0002] Liquid crystal cells commonly used in liquid crystal displays, such as TN liquid crystal cells (TFT), STN liquid crystal cells (STN), etc., have a structure in which liquid crystal components are sandwiched between two glass base materials. On the surface of the glass base material, optical films such as polarizing films, phase retardation films, etc. are laminated with an adhesive mainly composed of acrylic resin. Usually by a method in which an optical laminated film having an adhesive layer composed of an adhesive laminated on an optical film is first produced, and then a glass base material is laminated on the surface of the adhesive layer, the production consists of in this order An optical laminate consisting of a laminated glass base material, adhesive, and optical film. [0003] Such an optical laminate film tends to generate curl and the like due to large dimensional cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30B32B7/12B32B17/10B32B27/30C08F220/10C08K3/20C09J7/02C09J133/00C09J133/08C09J139/04C09J139/06C09J163/00C09J175/04G02B1/00
CPCB32B17/064C09J2401/006B32B2333/04G02B1/04C08K5/29C09J175/04C08F2220/1825C08G18/6266C09J7/0217C08K5/35C09J2203/318Y10T428/31649Y10T428/31645C09J7/385C08F220/1804B32B17/10C08L33/10C08L75/04C08F212/36C08F220/281C08F226/08C08F226/10C08F222/102C08F220/06C08F220/20C08F220/34C08F222/1006F16K19/006F16K31/60
Inventor 河村晃竹厚流岩田智
Owner SUMITOMO CHEM CO LTD
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