WO2022021905A1

WO2022021905A1 - Low-viscosity, high-performance, and solvent-free epoxy coating for containers and preparation method therefor

Info

Publication number: WO2022021905A1
Application number: PCT/CN2021/082165
Authority: WO
Inventors: 刘正伟; 邵德龙; 安玉岗
Original assignee: 麦加芯彩新材料科技(上海)股份有限公司
Priority date: 2020-07-28
Filing date: 2021-03-22
Publication date: 2022-02-03
Also published as: CN111793410A

Abstract

The present invention relates to a low-viscosity, high-performance, and solvent-free epoxy coating for containers and a preparation method therefor. The coating comprises component A and component B, and the mass ratio of component A to component B is 3-5:1. Component A comprises an active diluent, a modified epoxy resin, an antirust pigment, a coloring pigment, a modified talc with a low oil absorption, and an auxiliary agent; and component B comprises a modified amine curing agent, a drier, and a non-activated diluent. During preparation, component A and component B are firstly prepared respectively, and then component A and component B are mixed until uniform. Compared with the prior art, the low-viscosity, high-performance, and solvent-free epoxy coating for containers of the present invention can be applied to an intermediate paint and an inner finish paint for containers, and same not only has good mechanical properties and produces extremely low VOC emissions, but also makes up for the shortcomings of existing aqueous coatings regarding salt mist resistance, moisture resistance and chemical resistance.

Description

A kind of low-viscosity high-performance solvent-free epoxy coating for container and preparation method thereof

technical field

The invention belongs to the technical field of coatings, and relates to a low-viscosity, high-performance solvent-free epoxy coating for containers and a preparation method thereof.

Background technique

The existing container coating is a water-based coating supporting system, which has the problems of general salt spray resistance, poor chemical resistance, and poor heat and humidity resistance. During construction, bubbles in the film, pinholes, and sagging often occur, and there are many paint slag. , Sensitive to temperature and humidity, rust often occurs in the box, which not only brings inconvenience to the construction process of the box factory, but also greatly reduces the service life of the box for transporting some specific goods.

These deficiencies are caused because: on the one hand, water-based coatings use water as the medium, and the surface tension is large, which is easy to generate bubbles and difficult to eliminate. When the humidity is high and the temperature is low, the drying is slow and it is easy to sag; The film method slowly accumulates emulsion particles to form a film, and the cross-linking density is poor, resulting in poor resistance to salt spray, humidity and heat, and chemical resistance of the paint film. Corrosion occurs and can not meet the user's requirements well.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a low-viscosity, high-performance, solvent-free epoxy coating for containers and a preparation method thereof, which are used for container intermediate paints and interior finishes. The coating not only has good mechanical properties and extremely low VOC emissions, but Moreover, it makes up for the deficiencies of the existing water-based paints with poor salt spray resistance, damp heat resistance and chemical resistance.

The object of the present invention can be realized through the following technical solutions:

A low-viscosity high-performance solvent-free epoxy coating for containers, the coating comprises A component and B component, and the mass ratio of the A component to the B component is 3 to 5:1;

Described A component comprises the following components and parts by weight:

Described B component comprises the following components and parts by weight:

Modified amine curing agent 50～70 parts,

10-20 copies of drier,

Inactive diluent 30 to 40 copies.

Further, the reactive diluent is a difunctional polyene phenol glycidyl ether; the anti-rust pigment is a mixture of aluminum tripolyphosphate and zinc phosphate in a mass ratio of 1:0.8-1.2; Said coloring pigment is titanium dioxide.

Further, the auxiliary agents include silane coupling agent, anti-settling agent, viscosity reducing dispersing agent, defoaming agent and leveling agent, and the silane coupling agent, anti-settling agent, viscosity reducing dispersing agent, anti-foaming agent The mass ratio of foaming agent and leveling agent is (3-5):1:(1.5-2.5):(0.8-1.2):(0.8-1.2).

Further, the preparation process of the modified epoxy resin is as follows: after mixing glycidyl dimer acid, epichlorohydrin, xylene, and sodium hydroxide, react at 90-100° C. for 8-15 hours, and then Carry out layering, washing, and then carry out high-temperature distillation dehydration and solvent removal to obtain the modified epoxy resin;

The mass ratio of the dimer acid glycidyl ester, epichlorohydrin, xylene and sodium hydroxide is (3-5):(6-8):(7-9):(1-2). Wherein, xylene is the solvent, and sodium hydroxide is the basic catalyst.

Further, the preparation process of the low oil absorption modified talc powder is as follows: the talc powder is dried, mixed with a phthalate coupling agent, put into a high-speed mixing mixer, and stirred at 60-80° C. for 15- 20min, obtain the described low oil absorption modified talc after cooling;

The talc powder is 600-1250 mesh talc powder, the talc powder is dried at 90-100 DEG C for 1-3 hours, and the mass ratio of the talc powder and the phthalate coupling agent is 10-20: 1.

Further, described drier is tertiary amine, and described inactive diluent is LITE 2020.

Further, the preparation process of the modified amine curing agent is as follows: ethylenediamine, butanol and xylene are mixed uniformly, and a bifunctional polyenol glycidyl ether is added under stirring, and then the reaction vessel is sealed. , heated to 90-120°C for reflux reaction for 2-3h, after the reaction, the solvent and excess ethylenediamine were evaporated under reduced pressure, and the modified amine curing agent was obtained after cooling;

The mass ratio of ethylenediamine, butanol and xylene is (5-7):(4-6):(4-6).

A method for preparing a low-viscosity, high-performance solvent-free epoxy coating for containers. The method comprises the following steps: firstly preparing component A and component B, and then mixing component A and component B uniformly to obtain the coating .

Further, the preparation process of described A component comprises the following steps:

1) Under stirring, mix 50%-70% of the reactive diluent with the modified epoxy resin, and then continue stirring for 10-20min;

2) Under stirring, add viscosity reducing dispersant, anti-settling agent, coloring pigment, anti-rust pigment and low oil absorption modified talc to the mixture in step 1), then continue stirring for 10-20 min, and then add the mixture at 1500- Perform high-speed dispersion at a rotational speed of 2000 r/min, stop dispersion after the dispersion fineness reaches 50-80 microns, and transfer to the paint mixing tank;

3) Under stirring, add the remaining reactive diluent, silane coupling agent, defoaming agent and leveling agent to the mixture in step 2), and then continue to stir for 0.5 to 1 h to obtain the component A;

The preparation process of the B component is as follows: in a state of stirring, adding an inactive diluent, a modified amine curing agent and a drier, and then continuing to stir for 10-20 min to obtain the B component.

The application of a low-viscosity high-performance solvent-free epoxy coating in containers.

Traditional solvent-free coatings generally have high viscosity, relatively brittle paint film, short usable time, and poor thin coating properties, so they are not suitable for use on containers, while the present invention uses dimer acid glycidyl ester to react with epichlorohydrin The modified epoxy resin prepared by the method has certain elasticity, and its flexibility is better than that of traditional E51 and E20 resins, which improves the flexibility of the paint film. By using low-viscosity difunctional polyene phenol glycidyl ether as a reactive diluent, more epoxy groups participate in the reaction, and the cross-linking density is increased, which not only ensures the anti-corrosion performance, but also reduces the viscosity of the system. Generally speaking, the use of talc is to reduce the cost of the coating and improve the mechanical properties of the system, but the talc is difficult to prepare low-viscosity solvent-free coatings due to its large oil absorption. The modification of the coupling agent greatly reduces the oil absorption of the talc powder and ensures the low viscosity of the prepared solvent-free coating. Since there are drying room equipment in the construction of the container, the present invention modifies the curing agent to reduce the reactivity of the curing agent. The paint can be used for a long time, ensuring sufficient construction time. Because the viscosity of the prepared coating is relatively low, the spraying atomization is good, and the thin coating property is guaranteed.

Compared with the prior art, the present invention has the following characteristics:

1) The present invention provides a low-viscosity, high-performance, solvent-free epoxy coating for containers, which can be used on container intermediate paints and interior paints, which not only provides good mechanical properties, but also has extremely low VOC emissions, which is in line with national standards. The strictest environmental protection requirements protect the environment;

2) The present invention has excellent resistance to salt spray, heat and humidity, and chemical resistance, which can not only effectively avoid some defects in the construction process of container coatings, bring convenience to the construction, shorten the construction time, but also greatly prolong some humidity. long service life of cargo boxes or low-corrosive cargo boxes.

detailed description

The present invention will be described in detail below with reference to specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation manner and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

Example 1:

A low-viscosity high-performance solvent-free epoxy coating for containers, comprising the following components by weight:

Component A: 30 parts of PLR602A reactive diluent, 40 parts of modified epoxy resin, 10 parts of titanium dioxide, 10 parts of low oil absorption modified talc, 5.5 parts of anti-rust pigment, 1 part of EFKA-5010 dispersant, A- 2 parts of 187 silane coupling agent, 0.5 part of Optima polyamide wax anti-settling agent, 0.5 part of EFKA3777 leveling agent, and 0.5 part of 6800 defoamer.

Component B: 30 parts of LITE 2020 non-reactive diluent, 65 parts of modified amine curing agent, and 10 parts of tertiary amine drier.

Wherein, the anti-rust pigment is a mixture of aluminum tripolyphosphate and zinc phosphate in a mass ratio of 1:0.8 to 1.2;

The preparation process of the modified epoxy resin is as follows: adding 30-50 parts of dimer acid, 60-80 parts of epichlorohydrin, 70-90 parts of xylene, 10-20 parts of sodium hydroxide, React at 100°C for 8-15 hours, carry out layering, washing with water, and then carry out high-temperature distillation, dehydration, and solvent removal to obtain modified epoxy resin;

The preparation process of low oil absorption modified talc powder is as follows: weigh 1kg of 800-mesh talc powder on an electronic scale, dry it in a 100°C oven for 1-3 hours, put it into a high-speed mixing mixer after drying, and put it in a high-speed mixer at 60-80°C. According to the ratio of talc powder: phthalate coupling agent 10～20:1, stir for 15～20min, after cooling, obtain low oil absorption modified talc powder;

The preparation process of the modified amine curing agent is as follows: add 50-70 parts of ethylenediamine, 40-60 parts of butanol, and 40-60 parts of xylene to the reaction equipment, stir evenly, and slowly add bifunctionality during stirring After the addition, the reaction vessel was sealed, heated to 90-120 ° C, refluxed for 2-3 hours, and then the solvent and excess ethylenediamine were evaporated under reduced pressure. After the reaction was completed, the temperature was lowered to obtain modified Amine curing agent.

The coating is prepared according to the following method, and the specific steps are as follows:

A component:

(1) each component is weighed according to parts by weight;

(2) Put in part of the reactive diluent and modified epoxy resin under stirring, and stir for 10-20 minutes;

(3) Put in viscosity reducing dispersant, anti-settling agent, coloring pigment, anti-rust pigment and modified talc powder with low oil absorption under stirring state, and stir for 10-20 minutes after adding, and carry out high-speed dispersion, until the coating fineness is ≤50μ When, stop dispersing and transfer to paint mixing tank;

(4) Put in the remaining reactive diluent, silane coupling agent, defoamer and leveling agent under stirring, and stir for 0.5 to 1 hour to obtain component A.

Component B:

(1) each component is weighed according to parts by weight;

(2) Put in inactive diluent, modified amine curing agent and drier under stirring state, and stir for 10-20min to obtain B component.

(3) After mixing according to the weight ratio of A component:B component = 4:1, the scraper detects the appearance and the basic performance of the coating at the same time. After the inspection is qualified, filter with a 120-mesh basket or PE-200U and pack it.

The prepared low-viscosity high-performance solvent-free epoxy coating for containers was applied to the container. The specific test results are shown in Table 1:

Table 1

As can be seen from Table 1, the low-viscosity high-performance solvent-free epoxy coating of the present invention is used for container intermediate paint and interior finish paint, not only has good mechanical properties and extremely low VOC emissions, but also makes up for the existing water-based paint. Insufficient in salt spray resistance, humidity and heat resistance, and poor chemical resistance.

Example 2:

A low-viscosity high-performance solvent-free epoxy coating for containers, the coating comprises A component and B component, and the mass ratio of A component to B component is 3:1;

Component A includes the following components and parts by weight:

Component B includes the following components and contents by weight:

70 parts of modified amine curing agent,

10 parts of drier,

Inactive diluent 40 parts.

Wherein, the active diluent is a bifunctional polyene phenol glycidyl ether; the antirust pigment is a mixture of aluminum tripolyphosphate and zinc phosphate in a mass ratio of 1:0.8; and the coloring pigment is titanium dioxide.

Auxiliaries include silane coupling agent, anti-settling agent, viscosity reducing and dispersing agent, defoaming agent and leveling agent, and the mass ratio of silane coupling agent, anti-settling agent, viscosity reducing dispersing agent, defoaming agent and leveling agent is 5:1:1.5:1.2:0.8.

The preparation process of the modified epoxy resin is as follows: after mixing glycidyl dimer acid, epichlorohydrin, xylene, and sodium hydroxide, react at 100 °C for 8 hours, then perform layering, washing with water, and then perform high-temperature distillation After dehydration and solvent removal, the modified epoxy resin is obtained; the mass ratio of glycidyl dimer acid, epichlorohydrin, xylene and sodium hydroxide is 5:6:9:1.

The preparation process of the low oil absorption modified talc powder is as follows: the talc powder is dried and mixed with a phthalate coupling agent, and stirred at 80 ° C for 15 min, and the low oil absorption modified talc powder is obtained after cooling; 1000 mesh talc powder, talc powder was dried at 90°C for 3 hours, and the mass ratio of talc powder to phthalate coupling agent was 10:1.

The drier is tertiary amine and the inactive diluent is LITE 2020.

The preparation process of the modified amine curing agent is as follows: ethylenediamine, butanol and xylene are mixed uniformly, and the bifunctional polyene phenol glycidyl ether is added in a stirring state, and then the reaction vessel is sealed and heated to 120° C. Reflux reaction for 2h, after the reaction, the solvent and excess ethylenediamine are evaporated under reduced pressure, and the modified amine curing agent is obtained after cooling down; the mass ratio of ethylenediamine, butanol and xylene is 7:4:6.

The preparation method of the coating is as follows: firstly prepare the A component and the B component, and then mix the A component and the B component evenly.

The preparation process of component A includes the following steps:

1) Under stirring, mix 50% of the reactive diluent with the modified epoxy resin, and then continue stirring for 20 minutes;

2) Under stirring, add viscosity reducing dispersant, anti-settling agent, coloring pigment, anti-rust pigment and low oil absorption modified talcum powder to the mixture in step 1), then continue stirring for 10 min, and then at 2000 r/min. High-speed dispersion is carried out under the rotating speed, and the dispersion is stopped after the dispersion fineness reaches 50 microns;

3) Under stirring, add the remaining reactive diluent, silane coupling agent, defoaming agent and leveling agent to the mixture in step 2), and then continue to stir for 1 h to obtain component A;

The preparation process of component B is as follows: in a state of stirring, adding inactive diluent, modified amine curing agent and drier, and then continuing to stir for 10 minutes to obtain component B.

The coating is applied in containers.

Example 3:

A low-viscosity high-performance solvent-free epoxy coating for containers, the coating comprises A component and B component, and the mass ratio of A component to B component is 5:1;

Component A includes the following components and parts by weight:

Component B includes the following components and contents by weight:

50 parts of modified amine curing agent,

20 copies of drier,

Inactive diluent 30 parts.

Among them, the active diluent is a difunctional polyene phenol glycidyl ether; the anti-rust pigment is a mixture of aluminum tripolyphosphate and zinc phosphate in a mass ratio of 1:1.2; the coloring pigment is titanium dioxide.

Auxiliaries include silane coupling agent, anti-settling agent, viscosity reducing and dispersing agent, defoaming agent and leveling agent, and the mass ratio of silane coupling agent, anti-settling agent, viscosity reducing dispersing agent, defoaming agent and leveling agent is 3:1:2.5:0.8:1.2.

The preparation process of the modified epoxy resin is as follows: after mixing glycidyl dimer acid, epichlorohydrin, xylene, and sodium hydroxide, react at 90 °C for 15 hours, then perform layering, washing with water, and then perform high-temperature distillation After dehydration and solvent removal, the modified epoxy resin is obtained; the mass ratio of glycidyl dimer acid, epichlorohydrin, xylene and sodium hydroxide is 3:8:7:2.

The preparation process of the low oil absorption modified talc powder is as follows: the talc powder is dried, mixed with a phthalate coupling agent, stirred at 60 ° C for 20 min, and cooled to obtain the low oil absorption modified talc powder; the talc powder is 600-mesh talc powder, the talc powder was dried at 100°C for 1 hour, and the mass ratio of talc powder and phthalate coupling agent was 20:1.

The drier is tertiary amine and the inactive diluent is LITE 2020.

The preparation process of the modified amine curing agent is as follows: ethylenediamine, butanol and xylene are mixed uniformly, and the difunctional polyene phenol glycidyl ether is added in a stirring state, and then the reaction vessel is sealed and heated to 90 ° C for Reflux reaction for 3h, after the reaction is over, the solvent and excess ethylenediamine are evaporated under reduced pressure, and the modified amine curing agent is obtained after cooling down; the mass ratio of ethylenediamine, butanol and xylene is 5:6:4.

The preparation method of the coating is as follows: firstly, the A component and the B component are respectively prepared, and then the A component and the B component are mixed uniformly.

The preparation process of component A includes the following steps:

1) Under stirring, mix 70% of the reactive diluent with the modified epoxy resin, and then continue stirring for 10 minutes;

2) Under stirring, add viscosity reducing dispersant, anti-settling agent, coloring pigment, anti-rust pigment and low oil absorption modified talcum powder to the mixture in step 1), then continue stirring for 20 min, and then at 1500 r/min. High-speed dispersion is carried out under the rotating speed, and the dispersion is stopped after the dispersion fineness reaches 80 microns;

3) under stirring state, add remaining reactive diluent, silane coupling agent, defoamer and leveling agent to the mixture of step 2), then continue to stir for 0.5h to obtain component A;

The preparation process of component B is as follows: in a state of stirring, adding inactive diluent, modified amine curing agent and drier, and then continuing to stir for 20 minutes to obtain component B.

The coating is applied in containers.

Example 4:

A low-viscosity high-performance solvent-free epoxy coating for containers, the coating comprises A component and B component, and the mass ratio of A component to B component is 4:1;

Component A includes the following components and parts by weight:

Component B includes the following components and contents by weight:

60 parts of modified amine curing agent,

15 parts of drier,

Inactive diluent 35 parts.

Wherein, the active diluent is difunctional polyene phenol glycidyl ether; the anti-rust pigment is a mixture of aluminum tripolyphosphate and zinc phosphate in a mass ratio of 1:1; and the coloring pigment is titanium dioxide.

Auxiliaries include silane coupling agent, anti-settling agent, viscosity reducing and dispersing agent, defoaming agent and leveling agent, and the mass ratio of silane coupling agent, anti-settling agent, viscosity reducing dispersing agent, defoaming agent and leveling agent is 4:1:2:1:1.

The preparation process of the modified epoxy resin is as follows: after mixing glycidyl dimer acid, epichlorohydrin, xylene, and sodium hydroxide, react at 95°C for 12 hours, then carry out layering, washing with water, and then carry out high-temperature distillation After dehydration and solvent removal, the modified epoxy resin is obtained; the mass ratio of glycidyl dimer acid, epichlorohydrin, xylene and sodium hydroxide is 4:7:8:1.5.

The preparation process of the low oil absorption modified talc powder is as follows: the talc powder is dried, mixed with a phthalate coupling agent, stirred at 70 ° C for 17 min, and cooled to obtain the low oil absorption modified talc powder; the talc powder is 800-mesh talc powder was dried at 950°C for 2 hours, and the mass ratio of talc powder and phthalate coupling agent was 15:1.

The drier is tertiary amine and the inactive diluent is LITE 2020.

The preparation process of the modified amine curing agent is as follows: ethylenediamine, butanol and xylene are mixed uniformly, and the bifunctional polyene phenol glycidyl ether is added under stirring state, and then the reaction vessel is sealed and heated to 110 ° C to carry out Reflux reaction for 2.5h, after the reaction is over, the solvent and excess ethylenediamine are evaporated under reduced pressure, and the modified amine curing agent is obtained after cooling down; the mass ratio of ethylenediamine, butanol and xylene is 6:5:5.

The preparation process of component A includes the following steps:

1) Under stirring, mix 60% of the reactive diluent with the modified epoxy resin, and then continue stirring for 15 minutes;

2) Under stirring, add viscosity reducing dispersant, anti-settling agent, coloring pigment, anti-rust pigment and low oil absorption modified talcum powder to the mixture in step 1), then continue stirring for 15 min, and then at 1800 r/min. High-speed dispersion is carried out under the rotating speed, and the dispersion is stopped after the dispersion fineness reaches 65 microns;

3) Under stirring, add the remaining reactive diluent, silane coupling agent, defoamer and leveling agent to the mixture in step 2), and then continue to stir for 0.7h to obtain component A;

The preparation process of component B is as follows: in a state of stirring, adding inactive diluent, modified amine curing agent and drier, and then continuing to stir for 15 minutes to obtain component B.

The coating is applied in containers.

The foregoing description of the embodiments is provided to facilitate understanding and use of the invention by those of ordinary skill in the art. It will be apparent to those skilled in the art that various modifications to these embodiments can be readily made, and the generic principles described herein can be applied to other embodiments without inventive step. Therefore, the present invention is not limited to the above-mentioned embodiments, and improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should all fall within the protection scope of the present invention.

Claims

A low-viscosity, high-performance, solvent-free epoxy coating for containers, characterized in that the coating comprises A component and B component, and the mass ratio of the A component to the B component is 3 to 5:1;

Described A component comprises the following components and parts by weight:

Described B component comprises the following components and parts by weight:

Modified amine curing agent 50～70 parts,

10-20 copies of drier,

Inactive diluent 30 to 40 copies.
The low-viscosity, high-performance, solvent-free epoxy coating for containers according to claim 1, wherein the reactive diluent is a bifunctional polyenol glycidyl ether; and the anti-rust pigment is A mixture of aluminum tripolyphosphate and zinc phosphate in a mass ratio of 1:0.8 to 1.2; the coloring pigment is titanium dioxide.
The low-viscosity high-performance solvent-free epoxy coating for containers according to claim 1, wherein the auxiliary agent comprises a silane coupling agent, an anti-settling agent, a viscosity-reducing dispersant, a defoaming agent and a flow agent. leveling agent, and the mass ratio of the silane coupling agent, anti-settling agent, viscosity reducing and dispersing agent, defoaming agent and leveling agent is (3-5):1:(1.5-2.5):(0.8～1.2 ): (0.8～1.2).
The low-viscosity and high-performance solvent-free epoxy coating for containers according to claim 1, wherein the preparation process of the modified epoxy resin is as follows: glycidyl dimer acid, epichlorohydrin After mixing, xylene and sodium hydroxide, react at 90-100 ℃ for 8-15 hours, then carry out layering, washing with water, and then carry out high-temperature distillation and dehydration, and desolventizing, to obtain the modified epoxy resin;

The mass ratio of the glycidyl dimer acid, epichlorohydrin, xylene and sodium hydroxide is (3-5):(6-8):(7-9):(1-2).
The low-viscosity high-performance solvent-free epoxy coating for containers according to claim 1, wherein the preparation process of the low oil absorption modified talc powder is as follows: drying the talc powder with phthalate ester The coupling agent is mixed, and stirred at 60-80° C. for 15-20 min, and the modified talc powder with low oil absorption is obtained after cooling;

The talc powder is 600-1250 mesh talc powder, and the talc powder is dried at 90-100 DEG C for 1-3 hours, and the mass ratio of the talc powder and the phthalate coupling agent is 10-20: 1.
The low-viscosity high-performance solvent-free epoxy coating for containers according to claim 1, wherein the drier is a tertiary amine, and the inactive diluent is LITE 2020.
The low-viscosity, high-performance, solvent-free epoxy coating for containers according to claim 1, wherein the preparation process of the modified amine curing agent is: uniformly mixing ethylenediamine, butanol and xylene , and add bifunctional polyenol glycidyl ether under stirring, then seal the reaction vessel, heat to 90～120℃ for reflux reaction for 2～3h, after the reaction, the solvent and excess ethylenediamine are evaporated under reduced pressure , the modified amine curing agent is obtained after cooling;

The mass ratio of ethylenediamine, butanol and xylene is (5-7):(4-6):(4-6).
A method for preparing a low-viscosity, high-performance, solvent-free epoxy coating for containers as claimed in claim 3, characterized in that, the method comprises the steps of: firstly preparing components A and B respectively, and then preparing components A and B respectively. The components are mixed uniformly to obtain the coating.
The method for preparing a low-viscosity high-performance solvent-free epoxy coating for containers according to claim 8, characterized in that,

The preparation process of described A component comprises the following steps:

1) Under stirring, mix 50%-70% of the reactive diluent with the modified epoxy resin, and then continue stirring for 10-20min;

2) Under stirring, add viscosity reducing dispersant, anti-settling agent, coloring pigment, anti-rust pigment and low oil absorption modified talc to the mixture in step 1), then continue stirring for 10-20 min, and then add the mixture at 1500- High-speed dispersion is carried out at a rotational speed of 2000r/min, and the dispersion is stopped after the dispersion fineness reaches 50-80 microns;

3) Under stirring, add the remaining reactive diluent, silane coupling agent, defoaming agent and leveling agent to the mixture in step 2), and then continue to stir for 0.5 to 1 h to obtain the component A;

The preparation process of the B component is as follows: in a stirring state, adding an inactive diluent, a modified amine curing agent and a drier, and then continuing to stir for 10 to 20 minutes to obtain the B component.
An application of the low-viscosity high-performance solvent-free epoxy coating as claimed in any one of claims 1 to 7 in a container.