Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Adhesives and Adhesive Sheets

A technology of adhesives and adhesive sheets, applied in the direction of adhesives, adhesive types, ester copolymer adhesives, etc., can solve the problems of insufficient cohesion, low adhesion, foaming, low heat resistance, etc., to achieve Excellent effect of irregularity followability and heat resistance

Active Publication Date: 2016-09-07
LINTEC CORP
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, adhesives obtained by adding plasticizers and liquid paraffin have problems such as insufficient cohesive force, low adhesive force at high temperatures, foaming, and low heat resistance.
In addition, various problems such as plasticizer and fluid paraffin seeping out from the adhesive layer over time, lowering the durability of the adhesion, and contamination of the adherend are concerned.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Adhesives and Adhesive Sheets
  • Adhesives and Adhesive Sheets
  • Adhesives and Adhesive Sheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0134] 1. Modulation of Polymer (A1)

[0135] Into the reaction vessel equipped with a stirrer, a thermometer, a circulating cooler, a dropping device and a nitrogen introduction pipe, add 76.5 parts by mass of n-butyl acrylate, 20 parts by mass of methoxyethyl acrylate, and 3.0 parts by mass of acrylic acid. 0 parts by mass, 0.5 parts by mass of 2-hydroxyethyl acrylate, 200 parts by mass of ethyl acetate, and 0.08 parts by mass of 2,2'-azobisisobutyronitrile. Replace with nitrogen. While stirring under this nitrogen atmosphere, the temperature of the reaction solution was raised to 60° C., and after reacting for 16 hours, it was cooled to room temperature. Here, a part of the obtained solution was measured for molecular weight by the following method, and the generation of the polymer (A1) with a weight average molecular weight of 800,000 was confirmed.

[0136] 2. Modulation of Polymer (B1)

[0137] Into a reaction vessel equipped with a stirrer, a thermometer, a circul...

Embodiment 2

[0149] 2-methacryloyloxyethyl isocyanate (MOI), which is a polymerizable double bond-containing compound (b2), is reacted with a (meth)acrylic polymer (b1). At this time, the amount of isocyanate groups in the MOI is The HEA of the (meth)acrylic polymer (b1) was 0.2 molar equivalent. Except for this, the polymer (B2) was produced in the same manner as the polymer (B1) in Example 1. Part of the obtained solution was measured for molecular weight by the following method, and the generation of a polymer (B2) with a weight average molecular weight of 50,000 was confirmed.

[0150] Except having replaced the polymer (B1) with the polymer (B2), it carried out similarly to Example 1, and prepared the adhesive composition, and manufactured the polarizing plate which has an adhesive layer using this adhesive composition. In addition, the thickness of the adhesive layer was 25 μm.

Embodiment 3

[0151] [Example 3, Comparative Examples 1-3]

[0152] Except having changed the kind and compounding quantity of a polymer (B) as shown in Table 1, it carried out similarly to Example 1, and manufactured the polarizing plate which has an adhesive layer. In addition, the thickness of the adhesive layer was 25 μm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
widthaaaaaaaaaa
lengthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

An adhesive and an adhesive sheet excellent in uneven followability and heat resistance, characterized in that the gel fraction immediately after the adhesive layer is formed is G1, and the adhesive layer is formed at 23° C., 50% RH When the gel fraction after storage for 7 days in the environment is G2, the variation rate of the gel fraction calculated from the following formula is within 3%, and the elongation at break in the tensile test is 100-250%, and it breaks The stress is 0.2-0.6N / mm2. Gel fraction change rate (%)=|(G2-G1) / G2|×100.

Description

technical field [0001] The present invention relates to an adhesive (a material obtained by hardening an adhesive composition) and an adhesive sheet. Background technique [0002] In recent years, adhesives excellent in irregularity followability, which is one of properties of adhesives, have been expected. For example, in a liquid crystal panel, an adhesive layer formed from an adhesive composition is used in order to adhere a polarizing plate and a retardation plate to a glass substrate or the like of a liquid crystal cell. In recent years, with the advancement of thinning liquid crystal panels, it is necessary to mechanically polish the liquid crystal cells to make them thinner. Such mechanical polishing makes the surface of the liquid crystal cell rough, but in order to ensure the adhesion between the roughened liquid crystal cell and the adhesive layer, it is desired to improve the irregularity followability of the adhesive layer on the roughened surface. [0003] In ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/08C09J133/10C09J11/06C09J7/02C08F220/18C08F220/28C08F220/06C08F8/30
CPCC09J7/22C09J7/38C09J7/385C09J133/04C09J2203/318C09J2301/124C09J2301/302C09J2301/312
Inventor 又野仁荒井隆行小泽祐树所司悟
Owner LINTEC CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com