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Low-temperature quick-drying polymer-based conductive adhesive and preparation method thereof

A polymer and conductive adhesive technology, applied in the direction of conductive adhesives, adhesives, epoxy resin glue, etc., can solve the problems of poor conductivity and poor system stability of conductive adhesives, achieve conductive network stability, promote curing, and ensure stability Effect

Active Publication Date: 2020-11-27
ZHUZHOU FEILU ADVANCED MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a low-temperature quick-drying polymer-based conductive adhesive and its preparation method to solve the problem of poor conductivity and poor system stability of the conductive adhesive in the prior art. Disadvantages such as rapid curing at low temperature in the environment

Method used

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  • Low-temperature quick-drying polymer-based conductive adhesive and preparation method thereof
  • Low-temperature quick-drying polymer-based conductive adhesive and preparation method thereof
  • Low-temperature quick-drying polymer-based conductive adhesive and preparation method thereof

Examples

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Embodiment 1

[0051] A low-temperature quick-drying polymer-based conductive adhesive of the present invention, comprising A component and B component, in parts by weight, A component includes: 13 parts of bisphenol A type epoxy resin, 80 parts of conductive filler; 4 parts of carboxyl liquid nitrile rubber, 1 part of triethylhexyl phosphoric acid, 2 parts of D6802; component B includes: 70 parts of polyamide curing agent, 10 parts of DDS, 20.5 parts of xylene, 0.5 part of n-butanol; among them, conductive filler It is a mixture of acidified and reduced micron copper powder and nanometer copper graphene. The preparation process is as follows:

[0052] 1) Add 100g of micron copper powder into 5% dilute sulfuric acid solution, ultrasonically treat for 40 minutes to remove oxides on the surface of the copper powder, rinse with deionized water after suction filtration, remove residual dilute sulfuric acid, and then transfer the copper powder to an anhydrous Sonicate in ethanol for 20 minutes an...

Embodiment 2

[0080] The formula and preparation method are the same as in Example 1. When preparing the sample, take the upper layer paste and the lower layer paste of component A and mix them with component B.

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Abstract

The invention discloses a low-temperature quick-drying polymer-based conductive adhesive, which comprises a component A and a component B. The mass ratio of the component A to the component B is (10-15): 1, and the component A comprises polymer matrix resin, a conductive filler (a mixture of copper powder and nano-copper-loaded graphene), a wetting dispersant, a thixotropic agent and a curing agent. The preparation method comprises the following steps: S1, dewatering the polymer matrix resin, adding a wetting dispersant, a thixotropic agent and a flexibilizer into the polymer matrix resin, anduniformly stirring and dispersing; S2, adding a conductive filler into the material obtained in the step S1, uniformly dispersing to obtain the component A, and sealing at normal temperature for later use; S3, uniformly mixing a solvent, a curing agent and a curing accelerator to obtain the component B, and sealing the component B at normal temperature for later use. According to the polymer-based conductive adhesive disclosed by the invention, a mixture of the copper powder and the nano-copper-loaded graphene slurry is introduced as a conductive filler, so that the conductive performance ofthe conductive adhesive is greatly improved, and the conductive adhesive has a more stable conductive path.

Description

technical field [0001] The invention relates to a polymer-based conductive adhesive, in particular to a low-temperature quick-drying polymer-based conductive adhesive and a preparation method thereof. Background technique [0002] Conductive adhesive is a special adhesive that has both adhesion and conductivity after curing. It is mainly made by adding conductive fillers and other additives to the organic polymer matrix. After curing, the conductive particles are combined through the bonding effect of the matrix resin. A conductive path is formed, resulting in an adhesive with high electrical conductivity. Conductive adhesives are widely used in electronic packaging, integrated circuits and other fields. [0003] However, polymer-based conductive adhesives also have some problems in practical applications, such as poor conductivity in various environments, long curing time, high curing temperature, and poor storage stability. For example, the patent application document wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/02C09J9/02C09J11/08
CPCC09J163/00C09J9/02C09J11/08C08K2201/011C08K2201/001C08K2003/085C08K2201/014C08L13/00C08K13/06C08K9/02C08K3/08C08K9/12
Inventor 刘佳娜杨文元周虎黄立志郭海涛童鑫毛先安陆雄范国栋苏乙清
Owner ZHUZHOU FEILU ADVANCED MATERIAL TECH CO LTD
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