A kind of normal temperature curable fluorine-containing epoxy curing agent and its preparation and application

An epoxy curing agent and room temperature curing technology, which is applied in the field of chemical and chemical synthesis, can solve the problems of reduced transparency, phase separation, poor compatibility, etc., and achieve the effect of excellent mechanical properties and reducing the degree of phase separation

Active Publication Date: 2017-08-25
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compatibility between fluorine-containing polymers and epoxy resins is poor, and the resulting modified products often have defects such as phase separation, resulting in reduced mechanical properties and transparency, which greatly limits the use of fluorine-containing polymers to modify epoxy resins. Effect

Method used

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  • A kind of normal temperature curable fluorine-containing epoxy curing agent and its preparation and application
  • A kind of normal temperature curable fluorine-containing epoxy curing agent and its preparation and application
  • A kind of normal temperature curable fluorine-containing epoxy curing agent and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of fluorine-containing epoxy random copolymer solution: add 30 mass parts of trifluoroethyl acrylate, 60 mass parts of glycidyl methacrylate and 80 mass parts of methyl ethyl ketone, azobisisoheptyl 0.5 parts by mass of nitrile, mixed uniformly, heated to 78° C. and stirred for 12 hours to obtain a fluorine-containing epoxy random copolymer solution.

[0029] (2) Preparation of fluorine-containing epoxy curing agent curable at room temperature: Take 150 parts by mass of the fluorine-containing epoxy random copolymer solution prepared in step (1), add 120 parts by mass of tetraethylenepentamine, and react at 10°C 12h. The reaction mixture was distilled under reduced pressure, the solvent was evaporated, the residue was poured into an evaporating dish, and placed in an oven for vacuum drying to obtain a fluorine-containing epoxy curing agent curable at room temperature.

[0030] (3) Mix ERL-422180 parts by mass, 5 parts by mass of fluorine-containing epox...

Embodiment 2

[0032] (1) Preparation of fluorine-containing epoxy random copolymer solution: add 40 parts by mass of hexafluorobutyl methacrylate, 80 parts by mass of allyl glycidyl ether and 150 parts by mass of butyl acetate in a container, and azo 1.5 parts by mass of diisoheptanonitrile, mixed uniformly, heated to 100° C., stirred and reacted for 8 hours to obtain a fluorine-containing epoxy random copolymer solution.

[0033] (2) Preparation of fluorine-containing epoxy curing agent that can be cured at room temperature: Take 150 parts by mass of the fluorine-containing epoxy random copolymer solution prepared in step (1), add 40 parts by mass of diethylenetriamine, and react at 0°C 12h. The reaction mixture was distilled under reduced pressure, the solvent was evaporated, the residue was poured into an evaporating dish, and placed in an oven for vacuum drying to obtain a fluorine-containing epoxy curing agent curable at room temperature.

[0034] (3) 10 parts by mass of ERL-4229, 10 ...

Embodiment 3

[0036] (1) Preparation of fluorine-containing epoxy random copolymer solution: add 50 parts by mass of dodecafluoroheptyl methacrylate, 100 parts by mass of glycidyl acrylate and 150 parts by mass of toluene in a container, and benzoyl peroxide 2 parts by mass, mixed evenly, heated up to 110° C. and stirred for 8 hours to obtain a fluorine-containing and epoxy-containing random copolymer solution.

[0037](2) Preparation of fluorine-containing epoxy curing agent curable at room temperature: Take 150 parts by mass of the fluorine-containing epoxy random copolymer solution prepared in step (1), add 52 parts by mass of triethylenetetramine, and react at 30°C for 9 hours . The reaction mixture was distilled under reduced pressure, the solvent was evaporated, the residue was poured into an evaporating dish, and placed in an oven for vacuum drying to obtain a fluorine-containing epoxy curing agent curable at room temperature.

[0038] (3) 90 mass parts of bisphenol A type epoxy res...

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Abstract

The invention discloses a fluorine-containing epoxy curing agent curable at room temperature and its preparation and application, belonging to the field of chemical and chemical synthesis. The preparation of the fluorine-containing epoxy curing agent includes two steps of preparing a fluorine-containing epoxy random copolymer solution and preparing a fluorine-containing epoxy curing agent. The curing agent not only contains fluorine-containing groups, but also contains amino groups that can react with epoxy groups, and can participate in the curing reaction of epoxy resins, so that the fluorine-containing groups and epoxy resins can achieve molecular recombination and reduce the risk of phase separation. To maximize the modification effect of fluorine-containing groups. After the epoxy resin is modified by using the fluorine-containing epoxy curing agent of the present invention, the surface hydrophobicity and oil repellency of the epoxy resin and the mechanical properties are both excellent.

Description

technical field [0001] The invention belongs to the field of chemical and chemical synthesis, and in particular relates to a normal temperature curable fluorine-containing epoxy curing agent and its preparation method and application. Background technique [0002] Epoxy resin is a kind of thermosetting polymer material with good adhesion, corrosion resistance, electrical insulation and high strength. It is widely used in the fields of adhesives, coatings, electrical insulation materials and composite materials. However, epoxy resin has disadvantages such as brittleness, fatigue, insufficient heat resistance, and poor toughness. Fluoropolymers have large C-F bond energy, low polarizability, small fluorine atomic radius, excellent chemical stability, low surface energy, high and low temperature resistance, aging resistance, corrosion resistance, anti-sticking, and anti-fouling dielectric properties of organic fluorine compounds and self-lubricating characteristics. Modificat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/64C08F220/22C08F220/24C08F220/32C08F216/14C08F8/32
Inventor 刘伟区郭彦娟
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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