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High-strength epoxy resin aqueous phase curing agent as well as preparation method and application thereof

A technology of epoxy resin and curing agent, which is applied in the field of epoxy resin adhesives, can solve the problems of low strength of epoxy resin, high brittleness of the cured product, and easy explosion, and achieve excellent water resistance, good dissolution and dispersion, and relative good capacitive effect

Active Publication Date: 2018-06-22
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyamide curing agent curing epoxy resin has low strength, poor heat resistance, and slow curing (especially low temperature curing), so the application is limited
The phenolic modified phenalkamine curing agent has good water resistance and has the characteristics of rapid curing at low temperature, but the cured product is often brittle and prone to bursting

Method used

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  • High-strength epoxy resin aqueous phase curing agent as well as preparation method and application thereof
  • High-strength epoxy resin aqueous phase curing agent as well as preparation method and application thereof
  • High-strength epoxy resin aqueous phase curing agent as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] The preparation of embodiment 1 phenolic amide (formula (1)):

[0046] (1) Add 1 mole of m-cresol, 1 mole of tetraethylenepentamine and 1 mole of paraformaldehyde (calculated as formaldehyde units) in a 1000 ml three-necked flask at 60°C, then raise the temperature to 100°C for 6 hours, Heat up to 160°C to continue the reaction for 1 hour, cool down to obtain 1 mole of Mannich base phenolic polyamine, then add 1 mole of benzoic acid and heat up to 140°C for 2 hours, then heat up to 200°C for further dealcohol amidation reaction for 1 hour, cool down Finally, the phenalkamide FQXA1 as shown in formula (1) is mainly obtained. Sampling, through infrared detection, obtained as attached figure 1 The infrared spectrum shown.

[0047] (2) Add 1 mole of m-cresol, 1 mole of pentaethylenehexamine and 1 mole of formaldehyde solution (calculated based on the actual formaldehyde used) in a 1000 ml three-necked flask at 10°C, then raise the temperature to 70°C for 6 hours, Heat up...

Embodiment 2

[0050] The preparation of embodiment 2 phenolic amide (formula (2)):

[0051] (5) Add 2 moles of cardanol, 2 moles of triethylenetetramine and 2 moles of paraformaldehyde (calculated as formaldehyde units) in a 2000 ml three-neck flask at 70°C, heat it up to 150°C for dehydration after 3 hours of heat preservation React for 2 hours, cool to obtain 2 moles of Mannich base phenolic polyamine, add 1 mole of methyl acrylate at 10°C and react for 8 hours, then heat up to 70°C for 8 hours, then heat up to 120°C for 7 hours, Remove the small molecule by-product methanol, cool, and mainly obtain the phenalkamide FQXA5 shown in formula (2). Sampling, measured by infrared spectroscopy, obtained as attached image 3 The infrared spectrum shown.

[0052] (6) Add 2 moles of m-cresol, 2 moles of diethylenetriamine and 2 moles of formaldehyde solution (calculated based on the actual formaldehyde used) in a 1000 ml three-necked flask at 10°C, heat up to 60°C and react for 5 hours, Then hea...

Embodiment 3

[0053] Embodiment 3 contains the preparation of six-membered cyclic amidoamine (formula (3)~(6))):

[0054] (1) Add 2 moles of m-xylylenediamine to a 500 ml three-necked flask, and slowly add 1 mole of methyl acrylate dropwise after cooling to 10°C. After 1 hour of dripping, the temperature is raised to 30°C for 20 hours, and then heated to React at 120°C for 2 hours, remove the by-product methanol, and cool to obtain amidoamine XAJA1 mainly represented by formula (3). Sampling, through infrared detection, obtained as attached Figure 4 The infrared spectrum shown.

[0055] (2) Add 2 moles of 1,3-cyclohexanedimethylamine to a 500 ml three-necked flask, cool to 20°C and slowly add 1 mole of acrylic acid dropwise, after half an hour, raise the temperature to 80°C for 2 hours, then raise the temperature React at 140°C for 2 hours, remove by-product water, and cool to obtain amidoamine XAJA2 mainly shown in formula (4).

[0056] (3) Add 2 moles of N-aminoethylpiperazine to a 50...

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Abstract

The invention discloses a high-strength epoxy resin aqueous phase curing agent as well as a preparation method and an application thereof. The curing agent is obtained by mixing 70-95 wt% of phenolicamide, 5-30 wt% of diluent, 0-10 wt% of hexatomic ring containing amide amine and 0-5 wt% of phenolic tertiary amine at the room temperature of 20 DEG C to 100 DEG C, obtaining 100 parts by mass of anactive organic matter, adding 0-150 parts by mass of micrometer or nanometer pigment filler, mixing evenly, and cooling to the room temperature. The curing agent, a liquid epoxy resin or an epoxy resin, and a micrometer or nanometer inorganic filler compound are proportionally mixed, achieves excellent mechanical properties under the humid and underwater environment, and can be used to prepare awaterproof high pressure mould, a sealant, epoxy putty, a surfactant, an interface adhesive and an anticorrosive paint.

Description

technical field [0001] The invention belongs to the field of epoxy resin adhesives, and in particular relates to a high-strength epoxy resin aqueous phase curing agent and its preparation method and application. Background technique [0002] Epoxy resin materials have excellent mechanical properties and anti-corrosion properties, and are widely used in adhesives, anti-corrosion coatings and other fields. However, the unmodified epoxy resin and aliphatic polyamine are brittle after curing, and when used in large quantities at room temperature, due to the rapid reaction and large heat release, the accumulated heat is not dissipated in time, which often leads to implosion and failure. In addition, aliphatic polyamines are very soluble in water, and are prone to whitening in the presence of trace or small amounts of water or air, and cause resin curing failure in wet interfaces or underwater environments. The amidation reaction of fatty polyamines with dimer acids or polymer ac...

Claims

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Application Information

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IPC IPC(8): C08G59/44C08G59/50C08G59/54C08L63/00C08K3/36
CPCC08G59/44C08G59/5026C08G59/5033C08G59/5073C08G59/54C08K3/36C08K2201/003C08L63/00C08L2205/025C08K3/34
Inventor 王斌刘海俊黄月文
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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