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Anti-impact epoxy adhesive composition and preparation method thereof

A technology of epoxy adhesives and compositions, applied in the direction of adhesives, epoxy resin adhesives, adhesive types, etc., can solve problems such as brittleness and weak toughness, and achieve improved tensile shear strength and good impact resistance Effect

Active Publication Date: 2017-09-08
HANGZHOU ZHIJIANG NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

General toughening methods can improve the toughness of materials at room temperature, but at low temperatures, materials with good room temperature toughness will still become brittle
On the other hand, materials with good low temperature toughness may have weak toughness at room temperature

Method used

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  • Anti-impact epoxy adhesive composition and preparation method thereof
  • Anti-impact epoxy adhesive composition and preparation method thereof
  • Anti-impact epoxy adhesive composition and preparation method thereof

Examples

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preparation example Construction

[0091] The present invention also provides a kind of preparation method of above-mentioned epoxy adhesive composition, comprises the following steps:

[0092] A) heating and melting the epoxy resin after mixing to obtain the epoxy resin mixture;

[0093] B) Add difunctional epoxy diluent, toughening agent, inorganic filler, dewatering agent, thixotropic agent, heat-activated latent curing agent and curing accelerator to mixing and stirring in the epoxy resin mixture, vacuum Degassing to obtain an epoxy adhesive composition.

[0094] In the present invention, firstly, the epoxy resin is mixed and then heated and melted to obtain the epoxy resin mixed solution.

[0095] Specifically, heating the liquid epoxy resin to 95-105°C, adding the solid epoxy resin, mixing and stirring until the solid epoxy resin melts to obtain the epoxy resin mixture;

[0096] Next, add difunctional epoxy diluent, toughening agent, inorganic filler, dewatering agent, thixotropic agent, heat-activated ...

Embodiment 1

[0101] Embodiment 1 (epoxy resin modified polysulfide toughening agent D1)

[0102] Weigh 164 g of polythiogen gum G10 (purchased from Akzo Nobel Co., Ltd.) and add it to the reactor, then add bisphenol A epoxy resin (BE188-90, epoxy equivalent 182~192, purchased from Changchun Chemical Industry ( Jiangsu) Co., Ltd.) 36g, mixed evenly, reacted at 90°C for 3.5h under stirring conditions, and then cooled to room temperature to obtain a viscous liquid product Toughener D1.

[0103] The number average molecular weight was determined to be 5200-5700.

Embodiment 2

[0104] Embodiment 2 (epoxy resin modified polysulfide toughening agent D2)

[0105] Weigh 138 g of polythiogen gum G21 (purchased from Akzo Nobel Co., Ltd.) and add it to the reactor, then add bisphenol A epoxy resin (BE188-90, epoxy equivalent 182~192, purchased from Changchun Chemical Industry ( Jiangsu) Co., Ltd.) 62g, mixed evenly, reacted at 90°C for 3h under stirring conditions, and then cooled to room temperature to obtain a viscous liquid product Toughener D2.

[0106] The number average molecular weight was determined to be 3000-3600.

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Abstract

The invention provides an anti-impact epoxy adhesive composition. By adopting two different kinds of epoxy resin as raw materials and adding a composite toughening agent at least including a liquid rubber toughening agent with a core-shell structure, epoxy resin modified nitrile butadiene rubber, a ketoxime-capped reaction type polyurethane elastic prepolymer and an epoxy resin modified polysulfide rubber toughening agent, the obtained epoxy adhesive composition has good impact resistance in normal-temperature and low-temperature conditions; the steel-steel tensile shearing strength is also obviously improved.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to an impact-resistant epoxy adhesive composition and a preparation method thereof. Background technique [0002] After the epoxy glue is cured, it is usually prone to brittle cracking under the action of external force due to its poor toughness. In order to evaluate its toughness, the industry usually uses the index of impact strength, and its test method adopts the ISO 11343:2003 standard. General toughening methods can improve the toughness of materials at room temperature, but at low temperatures, materials with good room temperature toughness will still become brittle. On the other hand, materials with good low temperature toughness may have weak toughness at room temperature. Contents of the invention [0003] In view of this, the technical problem to be solved in the present invention is to provide a kind of impact-resistant epoxy adhesive composition and pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/04C09J163/00C09J109/02C09J175/08C09J187/00C09J11/04C09J11/08C08G81/00C08G18/66C08G18/48C08G18/32C08G18/28C08G18/12
CPCC08G18/12C08G18/286C08G18/3206C08G18/48C08G18/6677C08G81/00C08K2003/2206C08K2003/2241C08K2003/265C08L2205/025C08L2205/035C09J11/04C09J11/08C09J151/04C08L63/00C08L9/02C08L75/08C08L87/00C08K13/04C08K7/20C08K3/22C08K3/36C08K3/26
Inventor 何永富桑广艺夏佳斌钱立飞
Owner HANGZHOU ZHIJIANG NEW MATERIAL CO LTD
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