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

Adhesive composition and adhesive film

A technology of adhesives and compositions, applied in the direction of adhesives, amide/imide polymer adhesives, adhesive types, etc., can solve the problem of re-operability, durability and curl resistance of the adhesive layer at the same time , Insufficient durability, etc., to achieve excellent reworkability or durability, excellent dent resistance, and good coating properties

Active Publication Date: 2022-06-24
FUJIMORI KOGYO CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] Thus, even if the adhesive layer of the invention described in Patent Document 3 is excellent in stress relaxation due to its low gel fraction, durability may not be sufficient.
[0025] As described above, in the prior art, it is difficult to simultaneously solve the reworkability, durability and Curl resistance

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
  • Adhesive composition and adhesive film
  • Adhesive composition and adhesive film
  • Adhesive composition and adhesive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0131] Nitrogen gas was introduced into a reaction apparatus equipped with a reaction vessel, a stirrer, a thermometer, a reflux condenser, and a nitrogen delivery pipe, and the air in the reaction vessel was replaced with nitrogen gas. Then, 50 parts by weight of isononyl acrylate, 35 parts by weight of butyl acrylate, 10 parts by weight of methyl acrylate, 0.2 parts by weight of 8-hydroxyoctyl acrylate, 5 parts by weight of benzyl acrylate and a solvent (ethyl acetate) were added to the reaction vessel. ester) 60 parts by weight. Then, 0.1 part by weight of azobisisobutyronitrile as a polymerization initiator was added dropwise over 2 hours, and the mixture was reacted at 65°C for 6 hours to obtain the acrylic polymer solution of Example 1.

Embodiment 2～8 and comparative example 1～5

[0133] Examples were carried out in the same manner as in Example 1 above, except that the types and blending ratios of the monomers constituting the acrylic polymer were respectively as shown in the descriptions of Groups (A) to (D) in Table 1. The acrylic polymer solutions of Examples 2 to 8 and Comparative Examples 1 to 5.

[0134]

[0135] [Example 1]

[0136] To the acrylic polymer solution of Example 1 in the reaction vessel prepared as described above was added an adduct of xylylene diisocyanate (XDI) (Takenate (registered trademark) D-110N; Mitsui Chemicals, Inc. production) 0.05 parts by weight, 0.05 parts by weight of a silane coupling agent (KBM-403; 3-glycidyloxypropyltrimethoxysilane: manufactured by Shin-Etsu Chemical Co., Ltd.), and stirring and mixing to obtain an implementation Adhesive composition of Example 1. This adhesive composition was applied on a release film (polyethylene terephthalate (PET) film coated with a silicone resin) so that the thickness...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention provides excellent reworkability and durability, does not produce uneven brightness, and when the optical film is bonded to a thin liquid crystal cell as an adherend through an adhesive layer, the liquid crystal display panel does not curl and has a good appearance. Anti-curling pressure-sensitive adhesive composition and pressure-sensitive adhesive layer using the same. It also provides an adhesive layer excellent in dent resistance under load. The acrylic polymer in the composition is (A) an alkyl (meth)acrylate monomer with an alkyl group having carbon atoms of C8 to C18, and (B) an alkyl group having a carbon number of C1 to C5 Alkyl (meth)acrylate monomers, (C) hydroxyl-containing copolymerizable vinyl monomers and (D) aromatic group-containing copolymerizable vinyl monomers without carboxyl-containing copolymerizable vinyl monomers It is an acrylic polymer with a weight average molecular weight of 1,500,000-3,000,000, obtained by copolymerizing monomers, and the cross-linking agent in the composition is an isocyanate compound with a functionality of three or more.

Description

technical field [0001] The present invention relates to an adhesive composition and an adhesive film. More specifically, it relates to an adhesive composition for bonding an optical film mounted on a display panel, and an adhesive film using the composition. [0002] Further, the present invention provides an adhesive composition having excellent resistance to curling (bending) and use thereof, which has excellent reworkability and durability, does not cause curling of a display panel, which is a cause of uneven brightness such as light and shade of color, etc. An adhesive film of the composition was obtained. [0003] Furthermore, the pressure-sensitive adhesive layer using the pressure-sensitive adhesive composition of the present invention is also excellent in dent resistance at the time of loading. Background technique [0004] In recent years, as displays (image display devices) for displaying images, displays of various display methods such as liquid crystal displays...

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): C09J133/08C09J11/06C09J7/38C09J7/10G02B5/30
CPCC09J133/08C09J11/06C09J7/385C09J7/10C09J133/066G02B5/305C09J2433/00C09J2203/318C09J2301/312C09J2301/408C09J2301/302C08K5/29C09J133/10C09J133/26C09J7/22C09J7/40G02F1/1335G02B5/30
Inventor 长仓毅大津贺健太郎铃木史惠吉田弘幸菱沼昌世
Owner FUJIMORI KOGYO CO LTD
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