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Modified epoxy resin and preparation method thereof, emulsified modified epoxy resin and preparation method and application thereof, and sandwich adhesive for aluminum honeycomb core

An epoxy resin and modified technology, used in adhesives and other directions, can solve problems such as environmental protection and safety hazards, and achieve the effect of improving toughness, improving peel strength and shear strength, and overcoming brittleness

Inactive Publication Date: 2020-12-22
邓会群
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a modified epoxy resin and its preparation method, emulsified modified epoxy resin in order to overcome the problem that the aluminum honeycomb sandwich glue is an oily adhesive in the prior art, and there are environmental protection and safety hazards. Preparation method and application thereof, sandwich glue for aluminum honeycomb

Method used

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  • Modified epoxy resin and preparation method thereof, emulsified modified epoxy resin and preparation method and application thereof, and sandwich adhesive for aluminum honeycomb core
  • Modified epoxy resin and preparation method thereof, emulsified modified epoxy resin and preparation method and application thereof, and sandwich adhesive for aluminum honeycomb core
  • Modified epoxy resin and preparation method thereof, emulsified modified epoxy resin and preparation method and application thereof, and sandwich adhesive for aluminum honeycomb core

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preparation example Construction

[0037] The second aspect of the present invention provides a kind of preparation method of modified epoxy resin, wherein, described method comprises the following steps:

[0038] S1, in the presence of the first catalyst, after the epoxy resin I is mixed with polyethylene glycol, the first reaction is carried out to obtain the prepolymer;

[0039] S2. In the presence of a second catalyst, after mixing epoxy resin II, carboxyl-terminated nitrile rubber and / or hydroxyl-terminated nitrile rubber with the prepolymer, a second reaction is performed to obtain the modified epoxy resin.

[0040] In the present invention, in step S1, carry out the first reaction with epoxy resin I and polyethylene glycol to obtain a large amount of hydroxyl groups in the prepolymer, further introduce epoxy resin structural units and originate from carboxyl-terminated nitrile rubber and The structure unit of / or the hydroxyl-terminated nitrile rubber further enhances the content of hydrophilic groups in...

Embodiment 1

[0098]S1: Add 37 grams of epoxy resin I (CYD-128) and 600 grams of polyethylene glycol 6000 in an equimolar ratio to Reactor 1 and mix them, melt at 80°C, stir well, then add boron trifluoride ether (CYD-128 0.2wt% of the total mass of polyethylene glycol 6000), the reaction temperature was controlled at 80°C, and the reaction was maintained for 4 hours to obtain prepolymer A1, which was poured out from reactor 1, cooled to a solid, and set aside.

[0099] S2: Then add 200 grams of epoxy resin II (CYD-128), carboxyl-terminated nitrile rubber (20wt% of the mass of epoxy resin II) and prepolymer A1 (15wt% of the mass of epoxy resin II) to the reactor 2. Dissolve at 100°C, mix evenly, add catalyst phosphine bromide (0.5wt% of epoxy resin II mass), control reaction temperature at 150°C, and react for 2 hours to obtain modified epoxy resin A1. Wherein, the weight ratio of epoxy resin II, carboxyl-terminated nitrile rubber and prepolymer A1 is 100:20:15.

[0100] After testing, the...

Embodiment 2

[0103] S1: Add 46 grams of epoxy resin I (E-44) and 400 grams of polyethylene glycol 4000 in an equimolar ratio to Reactor 1 and mix them, melt at 80°C, stir well, then add boron trifluoride ether (E-44 and 0.1wt% of the total mass of polyethylene glycol), the reaction temperature was controlled at 80°C, and the reaction was maintained for 4 hours to obtain prepolymer A2, which was poured out from the reactor 1, cooled to a solid, and set aside.

[0104] S2: Then add 200 grams of epoxy resin II (CYD-128), carboxyl-terminated nitrile rubber (20wt% of the mass of epoxy resin II) and prepolymer (10wt% of the mass of epoxy resin II) to reactor 2 , dissolve at 100°C, mix well, add catalyst tetrabutylphosphonium (0.5wt% of epoxy resin II mass), control reaction temperature at 150°C, and react for 2 hours to obtain modified epoxy resin A2. Wherein, the weight ratio of epoxy resin II, carboxyl-terminated nitrile rubber and prepolymer A2 is 100:20:10.

[0105] After testing, the epoxy...

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Abstract

The invention relates to the field of epoxy resin adhesives, and discloses modified epoxy resin and a preparation method thereof, emulsified modified epoxy resin and a preparation method and application thereof, and a sandwich adhesive for an aluminum honeycomb core. The modified epoxy resin comprises a structural unit A derived from epoxy resin, a structural unit B derived from polyethylene glycol and a structural unit C derived from carboxyl-terminated nitrile rubber and / or hydroxyl-terminated nitrile rubber, wherein the epoxy equivalent of the epoxy resin is 168-1300 g / equivalent, and the epoxy equivalent of the modified epoxy resin is 170-3300 g / equivalent. The modified epoxy resin has the characteristics of water emulsibility, high toughness and high peel strength on the surface of aluminum metal after being cured, can be used in the field of honeycomb core preparation, and is particularly used for preparing the sandwich adhesive for aluminum honeycombs.

Description

technical field [0001] The invention relates to the field of epoxy resin adhesives, in particular to a modified epoxy resin and a preparation method thereof, an emulsified modified epoxy resin, a preparation method and application thereof, and a sandwich glue for aluminum honeycomb cores. Background technique [0002] Epoxy resin adhesives are mainly prepolymers based on epoxy resin and curing agent, and various plasticizers, tougheners, diluents, thixotropic agents, pigments, fillers, leveling agents, accelerators, etc. are added at the same time. By means of normal temperature or heating, a cross-linked polymer is cured by using its own epoxy group and the amino group, acid anhydride, hydroxyl perthiol group of the curing agent through addition reaction. The cured epoxy resin has good physical and chemical properties. It has excellent peel strength to the surface of metal and non-metal materials, good dielectric properties, small set shrinkage, good dimensional stability a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C09J187/00
CPCC08G81/025C09J187/005
Inventor 邓会群
Owner 邓会群
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