Ultra-high film thickness two-component epoxy iron red primer and application thereof

Abstract

The application provides a double-component epoxy iron red base paint with an ultrahigh film thickness and an application thereof, and belongs to the technical field of paint. In terms of mass percentage, the main agent comprises: AE-80 epoxy emulsion 35-45%, dispersant 1-2%, titanium white powder 5-10%, mica powder 5-15%, wollastonite 5-10%, talcum powder 5-10%, precipitated barium sulfate 2-10%, iron oxide red 5-10%, water 5-20%, thickening agent 0.2-0.5%, dipropylene glycol butyl ether 2-5%, wetting agent 0.1-0.3%, silane coupling agent 0.3-0.5%, defoaming agent 0.2-0.5%, wetting and defoaming agent 0.2-1%; the curing agent comprises: JT-WBH818 curing agent 50-70%, water 25-45%, and anti-flash rust agent 3-10%. The AE-80 epoxy emulsion can improve the film thickness and prevent sagging, and the JT-WBH818 curing agent does not affect the acid and alkali resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of paint technology, in particular to a two-component epoxy iron red primer with super high film thickness and application thereof. BACKGROUND

[0002] In rail transit paint, the dry film sagging film thickness of the existing epoxy primer is mostly 80-100 mu m, and the individual high is about 130 mu m. The customer requires the film thickness of the primer to be 75-85 mu m. In order to pursue aesthetics, the primer is polished after being sprayed, so that the actual film thickness of the primer is 80-100 mu m. The film thickness in some places of the intersection of the spray may reach 200 mu m. The consequences include: 1. Increase the risk of paint film sagging, 2. Cause the increase of air bubbles in the paint film, increase the channel of other substances to the substrate corrosion, reduce the performance of the paint, and cause the failure risk of the protective system of rail transit. The two-component epoxy iron red primer of the related technology has the problems of too large film thickness, sagging, too small film thickness, and poor acid and alkali resistance. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a two-component epoxy iron red primer with super high film thickness and application thereof. The two-component epoxy iron red primer of the present application has large film thickness, no sagging, and good acid and alkali resistance.

[0004] In order to achieve the above-mentioned purpose of the application, the present application provides the following technical scheme:

[0005] The present application provides a two-component epoxy iron red primer with super high film thickness, which comprises a main agent and a curing agent independently packaged,

[0006] The main agent comprises the following components in mass percentage: AE-80 epoxy emulsion 35-45%, dispersant 1-2%, titanium white powder 5-10%, mica powder 5-15%, wollastonite 5-10%, talc powder 5-10%, precipitated barium sulfate 2-10%, iron oxide red 5-10%, water 5-20%, thickening agent 0.2-0.5%, dipropylene glycol butyl ether (DPNB) 2-5%, wetting agent 0.1-0.3%, silane coupling agent 0.3-0.5%, defoaming agent 0.2-0.5%, wetting and defoaming agent 0.2-1%;

[0007] The curing agent comprises the following components in mass percentage: JT-WBH818 curing agent 50-70%, water 25-45%, and anti-flash rust agent 3-10%.

[0008] Preferably, the main agent comprises the following components by mass percentage: AE-80 epoxy emulsion 35%, dispersant 2%, titanium white powder 5%, mica powder 10%, wollastonite 10%, talc powder 5%, precipitated barium sulfate 5%, iron oxide red 10%, water 13.2%, thickening agent 0.5%, dipropylene glycol butyl ether 3%, wetting agent 0.2%, silane coupling agent 0.3%, defoaming agent 0.3%, wetting defoaming agent 0.5%.

[0009] Preferably, the main agent comprises the following components by mass percentage: AE-80 epoxy emulsion 40%, dispersant 2%, titanium white powder 5%, mica powder 10%, wollastonite 10%, talc powder 5%, precipitated barium sulfate 5%, iron oxide red 10%, water 8.2%, thickening agent 0.5%, dipropylene glycol butyl ether 3%, wetting agent 0.2%, silane coupling agent 0.3%, defoaming agent 0.3%, wetting defoaming agent 0.5%.

[0010] Preferably, the main agent comprises the following components by mass percentage: AE-80 epoxy emulsion 45%, dispersant 2%, titanium white powder 5%, mica powder 10%, wollastonite 10%, talc powder 5%, precipitated barium sulfate 5%, iron oxide red 10%, water 5.2%, thickening agent 0.5%, dipropylene glycol butyl ether 1%, wetting agent 0.2%, silane coupling agent 0.3%, defoaming agent 0.3%, wetting defoaming agent 0.5%.

[0011] Preferably, the particle size of the wollastonite and talc powder is 1250 mesh.

[0012] Preferably, the mass ratio of the main agent and the curing agent is 5:1.

[0013] Preferably, the thickness of the two-component epoxy iron red primer is 140-220 μm.

[0014] Preferably, the thickness of the two-component epoxy iron red primer is 180-200 μm.

[0015] Preferably, the curing agent comprises the following components by mass percentage: JT-WBH818 curing agent 60%, water 35%, anti-flash rust agent R B6 5%.

[0016] The application also provides application of the two-component epoxy iron red primer with super-high film thickness in the field of rail transit.

[0017] The application provides a double-component epoxy iron red base paint with super high film thickness, which comprises a main agent and a curing agent which are independently packed, the main agent comprises the following components in percentage by mass: AE-80 epoxy emulsion 35-45%, dispersing agent 1-2%, titanium white powder 5-10%, mica powder 5-15%, wollastonite 5-10%, talc powder 5-10%, precipitated barium sulfate 2-10%, iron oxide red 5-10%, water 5-20%, thickening agent 0.2-0.5%, dipropylene glycol butyl ether 2-5%, wetting agent 0.1-0.3%, silane coupling agent 0.3-0.5%, defoaming agent 0.2-0.5%, wetting and defoaming agent 0.2-1%, and the curing agent comprises the following components in percentage by mass: JT-WBH818 curing agent 50-70%, water 25-45% and anti-flash rust agent 3-10%.

[0018] Compared with the prior art, the application has the following beneficial effects:

[0019] In the application, the AE-80 epoxy emulsion can improve the film thickness and prevent sagging, can completely solve the problems of too large film thickness and sagging, can make the film thickness of the epoxy base paint reach 220 mu without sagging, can not affect the acid and alkali resistance when the JT-WBH818 curing agent is used, can reduce the cost and is suitable for industrial application. DETAILED DESCRIPTION

[0020] The application provides a double-component epoxy iron red base paint with super high film thickness, which comprises a main agent and a curing agent which are independently packed,

[0021] The main agent comprises the following components in percentage by mass: AE-80 epoxy emulsion 35-45%, dispersing agent 1-2%, titanium white powder 5-10%, mica powder 5-15%, wollastonite 5-10%, talc powder 5-10%, precipitated barium sulfate 2-10%, iron oxide red 5-10%, water 5-20%, thickening agent 0.2-0.5%, dipropylene glycol butyl ether 2-5%, wetting agent 0.1-0.3%, silane coupling agent 0.3-0.5%, defoaming agent 0.2-0.5%, wetting and defoaming agent 0.2-1%;

[0022] The curing agent comprises the following components in percentage by mass: JT-WBH818 curing agent 50-70%, water 25-45% and anti-flash rust agent 3-10%.

[0023] In the application, if no special description is given, the raw materials used are commercially available in the art.

[0024] In the present application, the main agent preferably comprises the following components by mass percentage: AE-80 epoxy emulsion 35%, dispersant 2%, titanium white 5%, mica powder 10%, wollastonite 10%, talc powder 5%, precipitated barium sulfate 5%, iron oxide red 10%, water 13.2%, thickening agent 0.5%, dipropylene glycol butyl ether 3%, wetting agent 0.2%, silane coupling agent 0.3%, defoaming agent 0.3%, wetting defoaming agent 0.5%;

[0025] or comprises the following components by mass percentage: AE-80 epoxy emulsion 40%, dispersant 2%, titanium white 5%, mica powder 10%, wollastonite 10%, talc powder 5%, precipitated barium sulfate 5%, iron oxide red 10%, water 8.2%, thickening agent 0.5%, dipropylene glycol butyl ether 3%, wetting agent 0.2%, silane coupling agent 0.3%, defoaming agent 0.3%, wetting defoaming agent 0.5%;

[0026] or comprises the following components by mass percentage: AE-80 epoxy emulsion 45%, dispersant 2%, titanium white 5%, mica powder 10%, wollastonite 10%, talc powder 5%, precipitated barium sulfate 5%, iron oxide red 10%, water 5.2%, thickening agent 0.5%, dipropylene glycol butyl ether 1%, wetting agent 0.2%, silane coupling agent 0.3%, defoaming agent 0.3%, wetting defoaming agent 0.5%.

[0027] In the present application, the particle size of the wollastonite and talc powder is preferably 1250 mesh.

[0028] In the present application, the AE-80 epoxy emulsion is preferably purchased from Shanghai Shuru Chemical Technology Co., Ltd.

[0029] In the present application, the dispersant is preferably BYK-190 dispersant.

[0030] In the present application, the titanium white is preferably titanium white 706.

[0031] In the present application, the mica powder is preferably GA-4 mica powder.

[0032] In the present application, the thickening agent is preferably thickening agent 0620.

[0033] In the present application, the wetting agent is preferably wetting agent 4100.

[0034] In the present application, the silane coupling agent is preferably 915 silane coupling agent, preferably purchased from Tianjin Aoluoqi Chemical Technology Co., Ltd.

[0035] In the present application, the defoaming agent is preferably BYK-028 defoaming agent.

[0036] In the present application, the wetting defoaming agent is preferably 104E wetting defoaming agent.

[0037] In the present application, the water is preferably deionized water.

[0038] In the present application, the mass ratio of the main agent and the curing agent is preferably 5:1.

[0039] In the present application, the thickness of the two-component epoxy iron red primer is preferably 140-220 μm, more preferably 180-200 μm, and specifically can be 140, 160, 180, 200 or 220 μm.

[0040] In the present application, the curing agent comprises the following components by mass percentage: JT-WBH818 curing agent 60%, water 35%, and anti-flash rust agent 5%.

[0041] In the present application, the anti-flash rust agent is preferably anti-flash rust agent RB60 (Raybo 60 anti-flash rust agent, USA).

[0042] In the present application, the JT-WBH818 curing agent is preferably purchased from Tianjin Lingwei New Material Technology Co., Ltd.

[0043] The present application does not have special limitations on the preparation method of the two-component epoxy iron red primer with ultra-high film thickness, and the preparation method of the composition well known to those skilled in the art can be used.

[0044] In the present application, the preparation method of the main agent preferably comprises pre-refining, grinding and blending in sequence.

[0045] In the present application, part of the water, wetting defoaming agent, dispersing agent, titanium white, iron oxide red, wollastonite, talc powder, precipitated barium sulfate and mica powder are mixed to carry out the pre-refining, and a pre-refined material is obtained.

[0046] In the specific embodiments of the present application, the part of the water is preferably added first, and stirring is started, with a dispersion frequency of 200-500 revolutions per minute. Then the wetting defoaming agent is added, and stirring is carried out for 2-3 minutes. Then the dispersing agent, titanium white, iron oxide red, wollastonite, talc powder, precipitated barium sulfate and mica powder are added in sequence, and each time after adding one item, stirring is carried out for 3-5 minutes before adding the next item, and the stirring speed is increased to 300-700 revolutions per minute. After adding all the items, stirring is continued for 15 minutes to complete the pre-refining.

[0047] After obtaining the pre-refined material, the pre-refined material is subjected to the grinding, and then the remaining water is used for milling to obtain a ground slurry.

[0048] The present application does not have special limitations on the ratio of the part of the water and the remaining water, and any ratio can be used.

[0049] In the present application, the particle size of the ground slurry is preferably ≤30 μm, more preferably ≤10 μm.

[0050] In the present application, the grinding is preferably carried out by a sand mill, the cooling water and the slurry flow rate are adjusted, the grinding temperature is preferably <50℃, the grinding pressure is preferably <0.2MPa, and the monitoring record is preferably carried out once every 20 minutes; the grinding is carried out by a reverse cylinder, the fineness is self-checked every time and recorded, the grinding is carried out to below 30μm, the sample is taken and checked, the fineness is qualified, the obtained pre-finished slurry is poured into a mixing cylinder, the remaining water is used for flushing the mill, and the ground slurry is obtained.

[0051] After the ground slurry is obtained, the present application carries out the mixing of the ground slurry, AE-80 epoxy emulsion, wetting agent, defoaming agent, thickening agent, silane coupling agent and dipropylene glycol butyl ether, and the main agent is obtained.

[0052] In the specific embodiment of the present application, the AE-80 epoxy emulsion and the wetting agent are preferably added into the mixing cylinder containing the ground slurry, are dispersed at a speed of 300-700rpm for 5 minutes, the defoaming agent is then added, the stirring speed is increased to 500-900rpm, and stirring is carried out for 60-90 minutes, the stirring speed is adjusted to 300-700rpm, and then the thickening agent, the silane coupling agent and the dipropylene glycol butyl ether are sequentially added, each addition is followed by stirring for 3-5 minutes before the next addition, and finally stirring is carried out for 20 minutes, and the sample is taken and checked.

[0053] The present application also provides the application of the super-high film thickness two-component epoxy iron red primer in the field of rail transit.

[0054] The present application is not particularly limited in the specific manner of the application, and the manner well known to those skilled in the art can be used.

[0055] The technical solutions in the present application will be clearly and completely described below in combination with the embodiments in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0056] Embodiment 1

[0057] Preparation process of the main agent of the super-high film thickness two-component epoxy iron red primer:

[0058] Firstly, add part of water and start stirring, the dispersion frequency is 500 rpm, then add wetting and defoaming agent, stir for 3 minutes, then add dispersant, titanium dioxide, iron oxide red, wollastonite, talc, precipitated barium sulfate and mica powder in turn, stir for 5 minutes after adding each item and then add the next one, the stirring speed is increased to 700 rpm, continue stirring for 15 minutes after adding all, complete the pre-milling; grind the obtained pre-milling material through a sand mill, adjust the cooling water and slurry flow rate to make the grinding temperature 40℃ and the grinding pressure 0.15 MPa, monitor and record every 20 minutes, reverse cylinder grinding, check the fineness after each pass and record, grind to below 30 μm, take a sample for inspection, and if the fineness is qualified, pour the obtained pre-milling slurry into a mixing cylinder and flush the mill with the remaining water to obtain a grinding slurry; add AE-80 epoxy emulsion and wetting agent into the mixing cylinder containing the grinding slurry, disperse at a speed of 700 rpm for 5 minutes, then add defoaming agent, increase the stirring speed to 900 rpm, stir for 90 minutes, adjust the stirring speed to 700 rpm, then add thickening agent, silane coupling agent and dipropylene glycol butyl ether in turn, stir for 5 minutes after adding each item and then add the next one, finally stir for 20 minutes, take a sample for inspection, and obtain the main agent of the ultra-high film thickness two-component epoxy iron red primer.

[0059] The main agent formulations of Examples 1-3 and Comparative Examples 1-3 are shown in Table 1. The resin in Examples 1-3 and Comparative Example 1 is AE-80 epoxy emulsion (purchased from Shanghai Rushui Chemical Technology Co., Ltd.), the resin in Comparative Example 2 is 3011 resin (purchased from Jiangsu Fuchi Sen New Material Co., Ltd.), and the resin in Comparative Example 3 is 2092 resin (purchased from Liangu Chemical Group).

[0060] The preparation processes of Examples 2-3 and Comparative Example 1 are the same as that of Example 1, and the only difference is the amount of raw materials used; the preparation processes of Comparative Examples 1-2 are the same as that of Example 1, and the only difference is the type of resin.

[0061] Table 1 Main agent formulations of Examples 1-3 and Comparative Examples 1-3 (wt%)

[0062] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Partially deionized water 12 7 4 17 12 12 104 wetting defoamer 0.5 0.5 0.5 0.5 0.5 0.5 BYK 190 dispersant 2 2 2 2 2 2 Titanium dioxide 706 5 5 5 5 5 5 Iron oxide red 10 10 10 10 10 10 1250 mesh wollastonite 5 5 5 5 5 5 1250 mesh talc 10 10 10 10 10 10 Precipitated barium sulfate 5 5 5 5 5 5 GA-4 mica 10 10 10 10 10 10 Remaining deionized water 1.2 1.2 1.2 1.2 1.2 1.2 Resin 35 40 45 30 35 35 4100 wetting agent 0.2 0.2 0.2 0.2 0.2 0.2 BYK-028 defoamer 0.3 0.3 0.3 0.3 0.3 0.3 0620 thickener 0.5 0.5 0.5 0.5 0.5 0.5 915 silane coupling agent 0.3 0.3 0.3 0.3 0.3 0.3 Dipropylene glycol butyl ether 3 3 1 3 3 3

[0063] The curing agent of the examples and comparative examples is composed of the following components in the following mass percentages: JT-WBH818 curing agent 60%, water 35%, and anti-flash rust agent RB6 5%.

[0064] In the two-component epoxy iron red primer of the examples and comparative examples, the mass ratio of the main agent to the curing agent is 5:1.

[0065] Performance test:

[0066] Acid and alkali resistance test standard: GB / T 9274.

[0067] The highest sagging dry film thickness of Example 1 is 220 μm, and there is no change after 168 h of acid resistance and alkali resistance. The highest sagging dry film thickness of Example 2 is 200 μm, and there is no change after 168 h of acid resistance and alkali resistance. The highest sagging dry film thickness of Example 3 is 180 μm, and there is no change after 168 h of acid resistance, and bubbling after 168 h of alkali resistance. The highest sagging dry film thickness of Comparative Example 1 is 200 μm, and there is no change after 168 h of acid resistance, and bubbling after 168 h of alkali resistance. The highest sagging dry film thickness of Comparative Example 2 is 160 μm, and there is bubbling after 168 h of acid resistance and alkali resistance. The highest sagging dry film thickness of Comparative Example 3 is 150 μm, and there is bubbling after 168 h of acid resistance and alkali resistance. It can be seen that the experimental data of Example 1 has the highest sagging film thickness, and excellent acid and alkali resistance.

[0068] The above description is merely preferred embodiments of the present application, and is not intended to limit the present application in any form. It should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered within the scope of the present application.

Claims

1. A two-component epoxy red iron oxide base paint with ultra-high film thickness, characterized in that, The main agent and the curing agent are independently packed, The main agent is composed of the following components in mass percentage: AE-80 epoxy emulsion 35%, dispersant 2%, titanium white powder 5%, mica powder 10%, wollastonite 5%, talc powder 10%, precipitated barium sulfate 5%, iron oxide red 10%, water 13.2%, thickening agent 0620 0.5%, dipropylene glycol butyl ether 3%, wetting agent 0.2%, silane coupling agent 0.3%, defoaming agent 0.3%, wetting and defoaming agent 0.5%; The curing agent is composed of the following components in mass percentage: JT-WBH818 curing agent 50~70%, water 25~45%, anti-flash rust agent 3~10%; The mass ratio of the main agent and the curing agent is 5:

1.

2. The two-component epoxy iron red base paint according to claim 1, characterized in that, The particle size of the wollastonite and the talc powder is 1250 mesh.

3. The two-part epoxy iron red basecoat according to claim 1, characterized in that, The thickness of the two-component epoxy iron red primer is 220 μm.

4. The two-part epoxy iron red basecoat of claim 1, wherein, The curing agent is composed of the following components in mass percentage: JT-WBH818 curing agent 60%, water 35%, anti-flash rust agent 5%.

5. The application of the two-component epoxy iron red primer with ultra-high film thickness according to any one of claims 1~4 in the field of rail transit.