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(Methyl) acrylate adhesive composition

A technology of acrylates and adhesives, applied in the direction of ester copolymer adhesives, adhesives, adhesive types, etc., can solve the problem of initial adhesiveness or decreased adhesiveness, poor compatibility, pressure-sensitive adhesive bonding over time Stability and storage stability deterioration and other issues, to achieve sufficient adhesive force and weather resistance, good adhesion over time stability and storage stability, the appropriate effect of adhesion reliability

Pending Publication Date: 2022-01-11
BENQ MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the silane compound is not compatible with the (meth)acrylate adhesive composition due to its polarity, and it will migrate to the bonding surface with storage time or bonding time, resulting in initial adhesion or adhesiveness. Decrease, making the pressure-sensitive adhesive's stability over time and storage stability worse

Method used

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  • (Methyl) acrylate adhesive composition
  • (Methyl) acrylate adhesive composition

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0059] Preparation Example 1: Preparation of Reactive Silane Copolymer I

[0060] With 50 parts by weight of n-butyl acrylate, 50 parts by weight of methyl acrylate, 20 parts by weight of 3-methacryloxypropyltrimethoxysilane (KBM-503, purchased from Shin-Etsu Chemical Industry, Japan), 1 After mixing parts by weight of 4-hydroxybutyl acrylate and 78 parts by weight of methyl ethyl ketone, nitrogen was passed through to remove oxygen to form solution A. Mix 0.36 parts by weight of azobisisobutyronitrile (AIBN) and 20 parts by weight of methyl ethyl ketone, heat to 85°C and start adding solution A. After the reaction is complete, reactive silane copolymer solution A can be prepared ', is a mixture of reactive silane copolymer I and methyl ethyl ketone, and the reactive silane copolymer I contains 0.0975 weight percent of hydroxyl functional groups and has a weight average molecular weight of 75,900.

preparation example 2

[0061] Preparation Example 2: Preparation of Reactive Silane Copolymer II

[0062] 50 parts by weight of n-butyl acrylate, 50 parts by weight of methyl acrylate, 20 parts by weight of 3-methacryloxypropyl trimethoxysilane (KBM-503, purchased from Shin-Etsu Chemical Industry, Japan), 5 After mixing parts by weight of 2-hydroxyethyl methacrylate and 82 parts by weight of methyl ethyl ketone, nitrogen gas was passed through to remove oxygen to form solution B. Mix 0.36 parts by weight of azobisisobutyronitrile (AIBN) and 20 parts by weight of methyl ethyl ketone, heat to 85°C and start adding solution B. After the reaction is complete, reactive silane copolymer solution B can be prepared ', is a mixture of reactive silane copolymer II and methyl ethyl ketone, and the reactive silane copolymer II contains 0.522 weight percent of hydroxyl functional groups and has a weight average molecular weight of 152,000.

Embodiment 1

[0063] Embodiment 1: Preparation of adhesive composition

[0064] Get 63 parts by weight of n-butyl acrylate, 20 parts by weight of 2-phenoxyethyl acrylate, 15 parts by weight of methyl acrylate, 1.5 parts by weight of acrylic acid, 0.8 parts by weight of methacrylic acid-2-hydroxyethyl The ester (2-HEMA) was mixed with 150 parts by weight of ethyl acetate. After nitrogen gas was passed through the mixed solution to remove oxygen for 0.5 hours, 0.065 parts by weight of azobisisobutyronitrile (AIBN) was added and the temperature was raised to 65°C for reaction. After the reaction was completed, a (meth)acrylate polymer solution could be obtained, which was a mixture of (meth)acrylate polymer and ethyl acetate, and the acid value of the (meth)acrylate polymer was 13.9mgKOH / g And the weight average molecular weight was 1,400,000.

[0065] The above (meth)acrylate polymer solution was taken and diluted with ethyl acetate (EAC) to a solid content of 18%. Take 100 parts by weight...

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Abstract

The invention discloses a (methyl) acrylate adhesive composition for laminating a polaroid, which comprises a (methyl) acrylate polymer with an acid value between 0 and 15 mgKOH / g, a cross-linking agent and a reactive silane copolymer, wherein the reactive silane copolymer is obtained by copolymerizing and deriving a silane compound represented by the following formula X-R1-SiR23-a (OR3) a (I), an acrylate monomer containing no hydroxyl group and having C1-C4 alkyl groups, and a hydroxyl (meth) acrylate monomer; in the formula (I), X is an acryloyl group or a (meth) acryloyloxy group, R1 is C1-C8 alkyl groups or alkoxy groups, R2 and R3 are C1-C4 alkyl groups, and a is an integer of 1 to 3. The (methyl) acrylate adhesive composition has sufficient adhesion and weather resistance, and provides good adhesion time stability and storage stability.

Description

technical field [0001] The invention relates to a (meth)acrylate adhesive composition that can be used for polarizers, especially a (meth)acrylate with good adhesion, weather resistance, stability over time and storage stability Adhesive composition. Background technique [0002] In order to provide image display devices such as liquid crystal displays or organic light emitting diode (OLED) displays with good image quality, polarizers with high transmittance and polarization are one of the necessary optical components. Recently, image display devices have been widely used in various fields, such as home displays, portable or wearable electronic products, automotive or aviation instrument panels, and large information display panels. [0003] In the use of image display devices, the surface of the polarizer generally has an adhesive layer to attach and fix it to the substrate of the display panel. As the application range of end products increases, the adhesive layer also d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J11/06C09J11/08C09J7/30
CPCC09J133/066C09J11/06C09J11/08C09J7/30C09J2433/00C08L43/04C08K5/29C08K5/15
Inventor 陈玟均
Owner BENQ MATERIALS
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