CN-121975088-A - Ionic liquid-cured expansion type fireproof and anti-corrosion epoxy resin and preparation method thereof

Abstract

The invention discloses an ionic liquid cured expansion type fireproof and anti-corrosion epoxy resin and a preparation method thereof, and belongs to the technical field of flame-retardant and anti-corrosion materials. The invention takes ionic liquid as a curing agent and an anticorrosive agent of epoxy resin and polyphosphate as a fireproof flame retardant and an anticorrosive agent of epoxy resin to prepare the intumescent fireproof anticorrosive epoxy resin, wherein the ionic liquid is a triazole-polyalcohol amine compound. The preparation method disclosed by the invention is mature in process and simple in steps, has good industrial production potential, and the anti-corrosion epoxy resin prepared based on the method has high mechanical strength and excellent flame retardant, low smoke, low toxicity and corrosion resistance, and has a wide application prospect in the field of anti-corrosion and flame retardant functional coatings.

Inventors

• JIAN RONGKUN
• MA TIANLONG
• LI XINMIAO

Assignees

• 福建师范大学

Dates

Publication Date

20260505

Application Date

20260129

Claims (10)

1. 1. The preparation method of the ionic liquid cured expansion type fireproof and anti-corrosion epoxy resin is characterized by comprising the following steps of: 1) Ion exchange is carried out on the ionic liquid and the polyphosphate at the temperature of 60-140 ℃ for 20-60 min, then epoxy resin is added, and the mixed reaction is carried out for 10-30 min at the temperature of 80-160 ℃ to obtain a mixed solution; 2) And pumping bubbles in the mixed solution by using a vacuum pump, and then solidifying and forming to obtain the fireproof and anti-corrosion epoxy resin.
2. 2. The method for preparing an intumescent fire-resistant and corrosion-resistant epoxy resin cured by ionic liquid according to claim 1, wherein the ionic liquid is a triazole-polyalcohol amine type compound.
3. 3. The method for preparing an ionic liquid cured intumescent fire-resistant corrosion-resistant epoxy resin according to claim 2, wherein the triazole-polyalcohol amine type compound comprises the following structure: Wherein Q + is a polyalcohol amine cation.
4. 4. The method for preparing an ionic liquid cured intumescent fire-resistant corrosion-resistant epoxy resin according to claim 3, wherein the polyalcohol amine cation is a cation formed by protonating or quaternizing polyalcohol amine with at least two hydroxyl groups and at least one amino group, the cation center is nitrogen atom, and the nitrogen atom is connected with hydroxyl-containing alkyl substituent.
5. 5. The preparation method of the ionic liquid cured expansion type fireproof and anti-corrosion epoxy resin is characterized in that the ionic liquid, the polyphosphate and the epoxy resin are respectively 5-40 parts, 5-30 parts and 50-90 parts by weight.
6. 6. The method for preparing the ionic liquid cured expansion type fireproof and anti-corrosion epoxy resin according to claim 1, wherein the polyphosphate is any one of ammonium salt and metal salt of the polyphosphate.
7. 7. The method for preparing the ionic liquid cured expansion type fireproof and anti-corrosion epoxy resin according to claim 1, wherein the epoxy resin is an organic compound containing two or more epoxy groups.
8. 8. The method for preparing the ionic liquid cured expansion type fireproof and anti-corrosion epoxy resin according to claim 1, wherein the curing is carried out at 140 ℃ for 1-4 hours and then at 160 ℃ for 1-4 hours.
9. 9. The preparation method of the ionic liquid cured expansion type fireproof and anti-corrosion epoxy resin is characterized in that the ion exchange temperature is 100-120 ℃ and the time is 20-30 min, the mixing temperature of the polyphosphate and the ionic liquid after the ion exchange is completed and the epoxy resin is 100-120 ℃ and the time is 10-20 min, and the curing is carried out at 140 ℃ for 2-3 h and then at 160 ℃ for 2-3 h.
10. 10. A fire-resistant and corrosion-resistant epoxy resin obtained by the preparation method according to any one of claims 1 to 9.

Description

Ionic liquid-cured expansion type fireproof and anti-corrosion epoxy resin and preparation method thereof Technical Field The invention relates to the technical field of flame-retardant and anti-corrosion materials, in particular to an ionic liquid-cured intumescent fireproof and anti-corrosion epoxy resin and a preparation method thereof. Background Epoxy resins are widely accepted as a thermosetting polymer for extremely wide use because of their excellent adhesive strength, good chemical resistance, excellent dimensional stability and remarkable electrical insulation properties. However, the widespread use of epoxy resins is severely hampered by two key drawbacks, inherent flammability and poor corrosion resistance in harsh environments. Epoxy resins are highly flammable polymers that burn violently and produce large amounts of fumes, which constitutes a significant safety hazard in practical applications. In addition, in corrosive environments such as ocean or chemical processing, epoxy resin-based materials are susceptible to degradation by attack of moisture, salts, acids and bases, resulting in a substantial decrease in mechanical properties and service life. Therefore, it is necessary to develop an epoxy resin material having excellent flame retardancy, corrosion resistance and high mechanical properties at the same time. Compared with the traditional organic curing agent, the ionic epoxy curing agent has unique extremely strong structural designability, and can accurately regulate and control the interaction between the ionic epoxy curing agent and a polymer matrix by regulating and controlling cations and anions, so that the directional improvement on the properties, the thermal stability and the corrosion resistance of the polymer is realized. Ammonium polyphosphate (APP) is used as a typical halogen-free phosphorus additive flame retardant, and is one of the preferable materials for flame retardant modification of epoxy resin by virtue of the advantages of high phosphorus content, low toxicity, environmental friendliness, economy and the like. Patent CN111560112B discloses a phosphorus-containing triazole organic amine salt flame retardant curing agent and application thereof in epoxy resin, and the cured epoxy resin has excellent flame retardant property and mechanical property. However, the invention does not give the epoxy resin anti-corrosion performance, and in addition, does not improve the vertical burning grade of the epoxy and the smoke suppression capability in the burning process, and does not realize the comprehensive improvement of the inflammability and the corrosion resistance of the epoxy resin. Disclosure of Invention The invention aims to overcome the defect of the epoxy resin in application, and provides an ionic liquid cured expansion type fireproof and anti-corrosion epoxy resin and a preparation method thereof. In order to achieve the above purpose, the present invention adopts the following technical scheme: The preparation method of the ionic liquid cured expansion type fireproof and anti-corrosion epoxy resin comprises the following steps: 1) Ion exchange is carried out on the ionic liquid and the polyphosphate at the temperature of 60-140 ℃ for 20-60 min, then epoxy resin is added, and the mixed reaction is carried out for 10-30 min at the temperature of 80-160 ℃ to obtain a mixed solution; 2) And pumping bubbles in the mixed solution by using a vacuum pump, and then solidifying and forming to obtain the fireproof and anti-corrosion epoxy resin. The invention firstly utilizes ionic liquid and polyphosphate to carry out chemical reaction, and then adds the ionic liquid and the polyphosphate into epoxy resin to be used as curing agent, flame retardant and corrosion inhibitor, and the cured expansion type fireproof and corrosion-resistant epoxy resin has the characteristics of high mechanical strength, flame retardance, low smoke, low toxicity, corrosion resistance and the like. The ionic liquid is a triazole-polyalcohol amine compound. The triazole-polyalcohol amine compound comprises the following structure: Wherein Q + is a polyalcohol amine cation. The polyalcohol amine cation is formed by protonating or quaternizing polyalcohol amine with at least two hydroxyl groups and at least one amino group, the cation center is nitrogen atom, and the nitrogen atom is connected with a cation containing hydroxyalkyl substituent. Preferably, the ionic liquid is triazole diethanolamine ionic liquid. The ionic liquid, the polyphosphate and the epoxy resin are respectively 5-40 parts, 5-30 parts and 50-90 parts by weight. Preferably, the ionic liquid, the polyphosphate and the epoxy resin are respectively 15-30 parts, 5-15 parts and 60-80 parts by weight. The polyphosphate is any one of ammonium salt and metal salt of polyphosphate, and preferably ammonium polyphosphate. The epoxy resin is an organic compound containing two or more epoxy groups, preferably bisphenol A epoxy resin. Pre