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Polymer particle, conductive particle, anisotropic conductive material and connection structure

A polymer and particle technology, used in the treatment of dyed polymer organic compounds, printed circuits, electrical components, etc., can solve problems such as the deformation of conductive particles, reduce the compressive elastic modulus, improve the compression deformation recovery rate, and improve the connection. The effect of reliability

Inactive Publication Date: 2011-06-29
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conductive particles are compressed and deformed

Method used

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  • Polymer particle, conductive particle, anisotropic conductive material and connection structure
  • Polymer particle, conductive particle, anisotropic conductive material and connection structure
  • Polymer particle, conductive particle, anisotropic conductive material and connection structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0197] To a dispersion obtained by uniformly dispersing 835 parts by weight of ion-exchanged water and 1,124 parts by weight of a 5.5% by weight aqueous solution of polyvinyl alcohol, 55 parts by weight of lauryl acrylate (LA) and 45 parts by weight of pentaerythritol tetraacrylate (PTA) were added and mixed. 3.1 parts by weight of droplets obtained by weight part and 3.1 parts by weight of PERBUTYL O (manufactured by NOF Corporation) as a polymerization initiator (the size of the droplets was adjusted so that the particle diameter was 240 μm) to obtain a mixed solution.

[0198] In a nitrogen atmosphere, the obtained mixed solution was polymerized at 70°C for 5 hours. Then, the particles are collected by performing suction filtration. The particles were washed with ion-exchanged water and acetone to completely remove the dispersing solvent, followed by drying to obtain polymer particles.

Embodiment 2～7 and comparative example 1

[0200] Except having used lauryl acrylate (LA) and pentaerythritol tetraacrylate (PTA) in the ratio shown in following Table 1, the same operation as Example 1 was performed, and the polymer particle was obtained.

Embodiment 8

[0204] 65 parts by weight of lauryl acrylate (LA), 35 parts by weight of pentaerythritol tetraacrylate (PTA), and 3.1 parts by weight of PERBUTYL O (manufactured by NOF Corporation) were mixed and subjected to suspension polymerization in a polyvinyl alcohol 1% by weight aqueous solution, followed by implementation The classification process was carried out, whereby polymer particles were obtained.

[0205] (Evaluation of Examples 1 to 8 and Comparative Examples 1 and 2)

[0206] (1) Compression elastic modulus of polymer particles (10% K value)

[0207] The compressive elastic modulus (10% K value) of the obtained polymer particles was measured by the above-mentioned method using a micro-compression tester (PCT-100 manufactured by Shimadzu Corporation).

[0208] (2) Compression set recovery rate of polymer particles

[0209] The compression set recovery ratio of the obtained polymer particles was measured by the above-mentioned method using a micro-compression tester (PCT-1...

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Abstract

The present invention aims to provide polymer particles having low compressive modulus of elasticity and high compressive deformation recovery rate. Specifically disclosed are polymer particles (2) which are obtained by copolymerizing copolymerization components including a polyfunctional (meth)acrylate monomer having a structure represented by one of formulae (1)-(3) and a monofunctional (meth)acrylate monomer having a structure represented by formula (4), and have a compressive deformation recovery rate of not less than 70%. In formula (1), n represents an integer of 4-10. In formula (2), R11 represents a hydrogen atom or an alkyl group having 1-4 carbon atoms; R12-R14 each represents an alkylene group having 1-4 carbon atoms; and R15-R17 each represents a hydrogen atom or a methyl group. In formula (3), R3-R6 each represents an alkylene group having 1-4 carbon atoms; and R7-R10 each represents a hydrogen atom or a methyl group. In formula (4), R1 represents a hydrogen atom or a methyl group; and R2 represents an alkyl group having 5-18 carbon atoms.

Description

technical field [0001] The present invention relates to polymer particles, which are polymer particles formed by copolymerization of monomers, which can be used, for example, as well as conductive particles, anisotropic conductive materials, and connected structures using the polymer particles. Electroconductive particles for connecting the electrodes of the connection target member are obtained. Background technique [0002] Anisotropic conductive materials such as anisotropic conductive pastes, anisotropic conductive inks, anisotropic conductive adhesives (adhesives), anisotropic conductive films, and anisotropic conductive sheets are widely known. In these anisotropic conductive materials, conductive particles are dispersed in paste, ink or resin. [0003] Anisotropic conductive materials have been used for connection between an IC chip and a flexible printed circuit board, or for connection between an IC chip and a circuit board having ITO electrodes, and the like. For...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/10C08J3/12
CPCC08F222/1006C09C3/10H05K2201/0218C01P2004/84H05K2201/0221H05K3/323C08F220/18C08F220/1812C08F222/102C08F222/103C08F222/104
Inventor 和田拓也永谷直之
Owner SEKISUI CHEM CO LTD
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