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Pressure-sensitive adhesive composition

A technology of pressure-sensitive adhesives and pressure-sensitive adhesive layers, applied in the direction of adhesive types, ester copolymer adhesives, adhesives, etc., which can solve the problems of shortened pot life and process stability of pressure-sensitive adhesives , Decreased storage stability and other issues, to achieve the effect of shortening the curing time, excellent antistatic property, and excellent antistatic property

Active Publication Date: 2016-04-06
DONGWOO FINE CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pressure-sensitive adhesive composition described in the above-mentioned documents has the effect of shortening aging, but due to the addition of a crosslinking accelerator, the viscosity of the pressure-sensitive adhesive composition changes rapidly, and the storage stability decreases, which has the effect of making the pressure-sensitive adhesive The shortcoming of shortening the pot life of the mixture, which may cause problems in process stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0082] Synthesis example 1. Synthesis of 5-hydroxypentyl acrylate

[0083] 【Chemical 3】

[0084] [Reaction 1]

[0085]

[0086] Dissolve 1,5-dihydroxypentane (10.5 g, 0.1 mol) in pyridine (100 mL), drop acryloyl chloride (9.05 g) from the dropping funnel over 10 minutes, stir at room temperature for 1 hour, and add Distilled water (200mL) and ethyl acetate (200mL) were extracted into the organic layer, and after vacuum distillation of the extracted organic layer, impurities and dimers were separated and removed by column chromatography, and the solvent was distilled off under reduced pressure to prepare acrylic acid 5 -Hydroxypentyl ester (8.7 g, yield 46.3%).

[0087] Dissolve the prepared compound in CDCl 3 Solvent, confirm NMR, confirm to be the 5-hydroxypentyl acrylate of purity more than 98% ( figure 1 ).

Synthetic example 2

[0088] Synthesis example 2. Synthesis of 6-hydroxyhexyl acrylate

[0089] 【Chemical 4】

[0090] [Reaction 2]

[0091]

[0092] Dissolve 1,6-dihydroxyhexane (11.8 g, 0.1 mol) in pyridine (100 mL), add acryloyl chloride (9.05 g) dropwise from the dropping funnel over 10 minutes, stir at room temperature for 1 hour, and then add distilled water (200mL) and ethyl acetate (200mL), extracted with an organic layer, and after vacuum distillation of the extracted organic layer, use column chromatography to separate and remove impurities and dimers to prepare 6-hydroxyhexyl acrylate (10.5g, Yield 61.0%).

[0093] Dissolve the prepared compound in CDCl 3 Solvent, confirm NMR, confirm to be the 6-hydroxyhexyl acrylate of purity more than 98% ( figure 2 ).

manufacture example 1

[0094] Production example 1. Production of acrylic copolymer A-1

[0095] In a 1 L reactor with nitrogen reflux and a cooling device installed to facilitate temperature regulation, 98 parts by weight of n-butyl acrylate (BA) and 2 parts by weight of 5-hydroxypentyl acrylate (Synthesis Example 1) were charged. 100 parts by weight of ethyl acetate (EA) was added as a solvent after the monomer mixture composed of 2.5 parts. Then, in order to remove oxygen, nitrogen gas was introduced for 1 hour to replace, and the temperature was maintained at 70°C. After uniformly stirring the monomer mixture, 0.07 parts by weight of azobisisobutyronitrile (AIBN) was added as a reaction initiator, reacted for 8 hours, and ethyl acetate was further added to produce an acrylic copolymer A-1.

[0096] It was confirmed that the obtained acrylic copolymer had a solid content of 40%, a weight average molecular weight of 800,000, a PDI of 7.6, and a viscosity of 11,500 cP.

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Abstract

The present invention relates to a pressure-sensitive adhesive composition comprising: an acrylic copolymer including more than or equal to 30 wt% of n-butylacrylate with respect to the total weight of monomers, and polymerized by including compounds represented by chemical formula 1; a polyfunctional isothiocyanate-based cross linking agent; an ionic anti-static agent including one or more types of positive ions of alkali metal positive ions and onium positive ions, and one or more types of negative ions of fluroine-containing organic negative ions and fluroine-containing inorganic negative ions; and a silane coupling agent having an electrophilic substituent or a nucleophilic substituent, thereby implementing short curing time, excellent coating properties, reworkability, durability, and anti-static properties, and anti-static properties over time.

Description

technical field [0001] The present invention relates to a pressure sensitive adhesive composition. Background technique [0002] In liquid crystal display devices (Liquid crystal display devices, LCDs), liquid crystal cells and polarizers equipped with liquid crystals are generally installed. ). [0003] Such polarizing plates and optical films are bonded to liquid crystal cells using pressure-sensitive adhesives. Acrylic pressure-sensitive adhesives based on acrylic polymers excellent in adhesiveness and transparency are often used as pressure-sensitive adhesives. The crosslinking of the acrylic pressure sensitive adhesive utilizes the combination of a crosslinking agent with the functional monomers of the acrylic polymer. [0004] A pressure-sensitive adhesive used for joining a liquid crystal cell and a polarizing plate must satisfy physical properties such as reusability in addition to adhesiveness to a base material, light leakage resistance, heat resistance, and hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J11/06C09J7/02G02F1/1335
CPCC09J9/00C09J11/06C09J133/066C09J11/04
Inventor 崔汉永安明龙长柱烈浅津悠司竹厚流
Owner DONGWOO FINE CHEM CO LTD
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