Ultrahigh-salt-spray-resistant two-component organic silicon coating and application thereof

Abstract

The invention provides an ultrahigh-salt-spray-resistant two-component organic silicon coating and application thereof, and belongs to the technical field of coatings. A main agent of the two-component organic silicon coating with ultrahigh salt spray resistance comprises an FNMT3009 water-based epoxy emulsion, manganese black Black B-260 and mica powder, and the main agent of the two-component organic silicon coating with ultrahigh salt spray resistance comprises the FNMT3009 water-based epoxy emulsion, the manganese black Black B-260 and the mica powder. The organic silicon resin FNMT3009 waterborne epoxy emulsion is adopted to improve the salt spray resistance, the manganese black BlackB-260 is a high-temperature-resistant pigment, the mica powder plays a role of a physical antirust substance, the two-component organic silicon coating is black paint resistant to high temperature and high salt spray, the high temperature resistance can reach 800 DEG C when the film thickness ranges from 25 micrometers to 35 micrometers, and the salt spray resistance can reach 1000 hours.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, and in particular to a two-component organosilicon coating with ultra-high salt spray resistance and application thereof. Background Art

[0002] Special materials are required for some special equipment, such as some parts on transformers need to be resistant to high temperatures and have high salt spray resistance requirements. High-temperature coatings require not only the resin itself to have high temperature resistance, but also the powder in the coating to have high temperature resistance and salt spray resistance. Summary of the invention

[0003] In view of this, the object of the present invention is to provide a two-component organosilicon coating with ultra-high salt spray resistance and its application. The two-component organosilicon coating of the present invention is a black paint resistant to high temperature and high salt spray.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0005] The present invention provides a two-component organic silicon coating with ultra-high salt spray resistance, comprising a main agent and a curing agent which are packaged independently.

[0006] The main agent comprises the following components in mass percentage: 40-60% FNMT3009 water-based epoxy emulsion, 1-3% dispersant, 5-10% manganese black Black B-260, 5-15% mica powder, 5-10% talc powder, 10-15% glass powder, 0.3-0.5% defoamer, 0.2-0.5% wetting defoamer, 0.2-0.5% wetting agent, 3-20% water, 0.2-0.5% thickener, 0.1-3% silane coupling agent, and 2-6% cosolvent;

[0007] The curing agent comprises the following components in percentage by mass: 50-80% of an organic silicon curing agent, 10-30% of water, and 5-10% of an anti-flash rust agent.

[0008] Preferably, the main agent includes the following components in mass percentage: 45% FNMT3009 water-based epoxy emulsion, 2% dispersant, 5% manganese black Black B-260, 10% mica powder, 5% talc, 10% glass powder, 0.3% defoamer, 0.5% wetting defoamer, 0.2% wetting agent, 19% water, 0.5% thickener, 0.3% silane coupling agent, and 2.2% cosolvent.

[0009] Preferably, the main agent includes the following components in mass percentage: 50% FNMT3009 water-based epoxy emulsion, 2% dispersant, 5% manganese black Black B-260, 10% mica powder, 5% talc, 10% glass powder, 0.3% defoamer, 0.5% wetting defoamer, 0.2% wetting agent, 14% water, 0.5% thickener, 0.3% silane coupling agent, and 2.2% cosolvent.

[0010] Preferably, the main agent includes the following components in mass percentage: 55% FNMT3009 water-based epoxy emulsion, 2% dispersant, 5% manganese black Black B-260, 10% mica powder, 5% talc, 10% glass powder, 0.3% defoamer, 0.5% wetting defoamer, 0.2% wetting agent, 9% water, 0.5% thickener, 0.3% silane coupling agent, and 2.2% cosolvent.

[0011] Preferably, the main agent includes the following components in mass percentage: 60% FNMT3009 water-based epoxy emulsion, 2% dispersant, 5% manganese black Black B-260, 10% mica powder, 5% talc, 10% glass powder, 0.3% defoamer, 0.5% wetting defoamer, 0.2% wetting agent, 4% water, 0.5% thickener, 0.3% silane coupling agent, and 2.2% cosolvent.

[0012] Preferably, the cosolvent is dipropylene glycol butyl ether.

[0013] Preferably, the mica powder is GA-4 mica powder.

[0014] Preferably, the mass ratio of the main agent to the curing agent is 5:1.

[0015] Preferably, the curing agent comprises the following components in percentage by mass: 75% of organic silicon curing agent, 20% of water, and 5% of anti-flash rust agent.

[0016] The present invention also provides the application of the ultra-high salt spray resistant two-component silicone coating described in the above technical solution in the coating field.

[0017] The invention provides a two-component organic silicon coating with ultra-high salt spray resistance. The coating comprises a main agent and a curing agent which are independently packaged. The main agent comprises the following components in mass percentage: 40-60% of FNMT3009 waterborne epoxy emulsion, 1-3% of a dispersant, 5-10% of manganese black Black B-260, 5-15% of GA-4 mica powder, 5-10% of talc powder, 10-15% of glass powder, 0.3-0.5% of a defoaming agent, 0.2-0.5% of a wetting defoaming agent, 0.2-0.5% of a wetting agent, 3-20% of water, 0.2-0.5% of a thickener, 0.1-3% of a silane coupling agent and 2-6% of a cosolvent; and the curing agent comprises the following components in mass percentage: 50-80% of an organic silicon curing agent, 10-30% of water and 5-10% of an anti-flash rust agent.

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

[0019] The two-component organosilicon coating of the present invention adopts organosilicon resin FNMT3009 water-based epoxy emulsion to improve salt spray resistance, manganese black Black B-260 is a high-temperature resistant pigment, and mica powder plays a role of physical rust preventer. The two-component organosilicon coating of the present invention is a black paint resistant to high temperature and high salt spray. When the film thickness is 25-35 μm, the high temperature resistance can reach 800°C, and the salt spray resistance can reach 1000h. DETAILED DESCRIPTION

[0020] The present invention provides a two-component organic silicon coating with ultra-high salt spray resistance, comprising a main agent and a curing agent which are packaged independently.

[0021] The main agent comprises the following components in mass percentage: 40-60% FNMT3009 water-based epoxy emulsion, 1-3% dispersant, 5-10% manganese black Black B-260, 5-15% mica powder, 5-10% talc powder, 10-15% glass powder, 0.3-0.5% defoamer, 0.2-0.5% wetting defoamer, 0.2-0.5% wetting agent, 3-20% water, 0.2-0.5% thickener, 0.1-3% silane coupling agent, and 2-6% cosolvent;

[0022] The curing agent comprises the following components in percentage by mass: 50-80% of an organic silicon curing agent, 10-30% of water, and 5-10% of an anti-flash rust agent.

[0023] In the present invention, unless otherwise specified, the raw materials used are all commercially available products in the art.

[0024] In the present invention, the main agent preferably includes the following components in mass percentage: FNMT3009 water-based epoxy emulsion 45%, dispersant 2%, manganese black Black B-2605%, mica powder 10%, talc powder 5%, glass powder 10%, defoamer 0.3%, wetting defoamer 0.5%, wetting agent 0.2%, water 19%, thickener 0.5%, silane coupling agent 0.3%, cosolvent 2.2%; or

[0025] The composition comprises the following components in percentage by mass: 50% FNMT3009 waterborne epoxy emulsion, 2% dispersant, 5% manganese black BlackB-260, 10% mica powder, 5% talc powder, 10% glass powder, 0.3% defoamer, 0.5% wetting defoamer, 0.2% wetting agent, 14% water, 0.5% thickener, 0.3% silane coupling agent, and 2.2% cosolvent; or

[0026] The composition comprises the following components in percentage by mass: 55% FNMT3009 waterborne epoxy emulsion, 2% dispersant, 5% manganese black BlackB-260, 10% mica powder, 5% talc powder, 10% glass powder, 0.3% defoamer, 0.5% wetting defoamer, 0.2% wetting agent, 9% water, 0.5% thickener, 0.3% silane coupling agent, and 2.2% cosolvent; or

[0027] It includes the following components in mass percentage: FNMT3009 water-based epoxy emulsion 60%, dispersant 2%, manganese black BlackB-2605%, mica powder 10%, talc powder 5%, glass powder 10%, defoamer 0.3%, wetting defoamer 0.5%, wetting agent 0.2%, water 4%, thickener 0.5%, silane coupling agent 0.3%, and cosolvent 2.2%.

[0028] In the present invention, the mica powder is GA-4 mica powder.

[0029] In the present invention, the cosolvent is preferably dipropylene glycol butyl ether (DPNB).

[0030] In the present invention, the FNMT3009 water-based epoxy emulsion is preferably purchased from Hangzhou Nuotu New Material Technology Co., Ltd.

[0031] In the present invention, the dispersant is preferably BYK-190 dispersant.

[0032] In the present invention, the mesh size of the talc is preferably 1250 mesh.

[0033] In the present invention, the mesh size of the glass powder is preferably 1250 mesh.

[0034] In the present invention, the water is preferably deionized water.

[0035] In the present invention, the defoaming agent is preferably 2507 defoaming agent.

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

[0037] In the present invention, the wetting agent is preferably 4100 wetting agent.

[0038] In the present invention, the thickener is preferably thickener 0620.

[0039] In the present invention, the silane coupling agent is preferably MP200 silane coupling agent.

[0040] In the present invention, the mass ratio of the main agent to the curing agent is preferably 5:1.

[0041] In the present invention, the curing agent preferably includes the following components in percentage by mass: 75% of organic silicon curing agent, 20% of water, and 5% of anti-flash rust agent.

[0042] In the present invention, the organosilicon curing agent is preferably FNMT 909, which is preferably purchased from Hangzhou Noto New Material Technology Co., Ltd.

[0043] In the present invention, the flash rust inhibitor is preferably flash rust inhibitor RB60.

[0044] The present invention has no particular limitation on the preparation method of the ultra-high salt spray resistant two-component organosilicon coating, and a method well known to those skilled in the art may be adopted.

[0045] In the present invention, the preparation method of the main agent preferably comprises pre-mixing, grinding and blending performed in sequence.

[0046] In the present invention, part of water, a wetting defoamer, a dispersant, manganese black Black B-260, glass powder, talcum powder and mica powder are preferably mixed for pre-mixing to obtain a pre-mixed material.

[0047] In a specific embodiment of the present invention, it is preferred to first add the part of water, start stirring, the dispersion frequency is 200 to 500 rpm, then add the wetting defoamer, stir for 2 to 3 minutes, and then add the dispersant, manganese black Black B-260, glass powder, talcum powder and mica powder in sequence, stir for 3 to 5 minutes after each addition and then add the next item, increase the stirring speed to 300 to 700 rpm, continue stirring for 15 minutes after addition, and complete the pre-refining.

[0048] After obtaining the pre-mixed material, the pre-mixed material is ground, and then flushed with the remaining water to obtain a grinding slurry.

[0049] The present invention has no particular limitation on the ratio of the partial water to the remaining water, and any ratio may be used.

[0050] In the present invention, the particle size of the polishing slurry is preferably ≤30 μm, more preferably ≤10 μm.

[0051] In the present invention, the grinding is preferably carried out in a sand mill, and the cooling water and slurry flow rates are adjusted so that the grinding temperature is preferably <50°C, the grinding pressure is preferably <0.2MPa, and monitoring and recording are preferably performed every 20 minutes; the grinding is carried out in an inverted cylinder, and the fineness is self-checked and recorded each time. After the fineness is below 30μm, samples are taken for inspection. If the fineness is qualified, the obtained pre-refined slurry is poured into a blending cylinder and ground with the remaining water to obtain a grinding slurry.

[0052] After obtaining the grinding slurry, the present invention mixes the grinding slurry, FNMT3009 water-based epoxy emulsion, a wetting agent, a defoaming agent, a thickener, a silane coupling agent and a cosolvent to obtain the main agent.

[0053] In a specific embodiment of the present invention, the FNMT3009 water-based epoxy emulsion and the wetting agent are preferably added to a mixing cylinder containing a grinding slurry, dispersed at a speed of 300 to 700 rpm for 5 minutes, and then a defoamer is added, and the stirring speed is increased to 500 to 900 rpm. Stir for 60 to 90 minutes, and the stirring speed is adjusted to 300 to 700 rpm. Then, a thickener, a silane coupling agent and a cosolvent are added in sequence, and each item is stirred for 3 to 5 minutes before adding the next item. Finally, stir for 20 minutes, and take samples for inspection.

[0054] The present invention also provides the application of the ultra-high salt spray resistant two-component silicone coating described in the above technical solution in the coating field.

[0055] The present invention has no particular limitation on the specific manner of the application, and any manner familiar to those skilled in the art may be used.

[0056] The technical solutions in the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] Example 1

[0058] Preparation process of the main agent of ultra-high salt spray resistant two-component silicone coating:

[0059] First add the water, start stirring, the dispersion frequency is 500 rpm, then add the wetting defoamer, stir for 3 minutes, then add the dispersant, manganese black BlackB-260, glass powder, talcum powder and mica powder in sequence, stir for 5 minutes after each addition, and then add the next item, increase the stirring speed to 700 rpm, continue stirring for 15 minutes after adding, and complete the pre-refining; grind the obtained pre-refined material, pass it through a sand mill, adjust the cooling water and slurry flow rate, make the grinding temperature 40°C, the grinding pressure 0.15MPa, monitor and record every 20 minutes, grind in an inverted cylinder, and self-check the fineness and record it each time , grind to less than 10μm, take samples for inspection, if the fineness is qualified, put the obtained pre-refined slurry into the mixing cylinder, grind with the remaining water to obtain the grinding slurry; add FNMT3009 water-based epoxy emulsion and wetting agent into the mixing cylinder containing the grinding slurry, disperse at 700 rpm for 5 minutes, then add defoamer, increase the stirring speed to 900 rpm, stir for 90 minutes, adjust the stirring speed at 700 rpm, and then add thickener, silane coupling agent and cosolvent in turn, stir for 5 minutes after adding each item, and finally stir for 20 minutes, take samples for inspection, and obtain the main agent of the two-component silicone coating with ultra-high salt spray resistance.

[0060] The main agent formulas of Examples 1 to 4 and Comparative Examples 1 to 3 are shown in Table 1. The resin in Examples 1 to 4 is FNMT3009 water-based epoxy emulsion (purchased from Hangzhou Nuotu New Material Technology Co., Ltd.), the resin in Comparative Example 1 is H-502-42W epoxy resin (purchased from Japan DIC), the resin in Comparative Example 2 is 2403 resin (purchased from United Curing Group), and the resin in Comparative Example 3 is 2033 resin (purchased from Wanhua Chemical Group Co., Ltd.).

[0061] The preparation process of the main agent in Examples 2 to 4 and Comparative Examples 1 to 3 is the same as that in Example 1, the only difference being the type and amount of the raw materials.

[0062] Table 1 Formulations of Examples 1 to 4 and Comparative Examples 1 to 3 (wt%)

[0063]

[0064] Examples and Comparative Examples The curing agent includes the following components in percentage by mass: 75% of organic silicon curing agent FNMT 909 (purchased from Hangzhou Nuotu New Material Technology Co., Ltd.), 20% of water, and 5% of anti-flash rust agent RB60.

[0065] In the two-component silicone coatings of the embodiments and comparative examples, the mass ratio of the main agent to the curing agent is 5:1.

[0066] Performance Testing:

[0067] High temperature resistance test standard: JG / T25-2017.

[0068] Salt spray resistance test standard: GB / T 1771.

[0069] The high temperature resistance of Examples 1 to 4 is 800°C, the high temperature resistance of Comparative Example 1 is 200°C, the high temperature resistance of Comparative Example 2 is 300°C, and the high temperature resistance of Comparative Example 3 is 200°C.

[0070] The salt spray resistance time of Example 1 is 800h, the salt spray resistance time of Example 2 is 900h, the salt spray resistance time of Example 3 is 1000h, the salt spray resistance time of Example 4 is 900h, the salt spray resistance time of Comparative Example 1 is 600h, the salt spray resistance time of Comparative Example 2 is 500h, and the salt spray resistance time of Comparative Example 3 is 100h. It can be seen that the high temperature resistance and salt spray resistance performance of Example 3 are the best.

[0071] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A two-component silicone coating with ultra-high salt spray resistance, characterized in that: Including independent packaging of main agent and curing agent, The main agent comprises the following components in mass percentage: 40-60% FNMT3009 water-based epoxy emulsion, 1-3% dispersant, 5-10% manganese black Black B-260, 5-15% mica powder, 5-10% talc powder, 10-15% glass powder, 0.3-0.5% defoamer, 0.2-0.5% wetting defoamer, 0.2-0.5% wetting agent, 3-20% water, 0.2-0.5% thickener, 0.1-3% silane coupling agent, and 2-6% cosolvent; The curing agent comprises the following components in percentage by mass: 50-80% of an organic silicon curing agent, 10-30% of water, and 5-10% of an anti-flash rust agent.

2. The two-component silicone coating according to claim 1, characterized in that: The main agent comprises the following components in mass percentage: 45% of FNMT3009 water-based epoxy emulsion, 2% of dispersant, 5% of manganese black Black B-260, 10% of mica powder, 5% of talc powder, 10% of glass powder, 0.3% of defoamer, 0.5% of wetting defoamer, 0.2% of wetting agent, 19% of water, 0.5% of thickener, 0.3% of silane coupling agent and 2.2% of cosolvent.

3. The two-component silicone coating according to claim 1, characterized in that: The main agent comprises the following components in mass percentage: 50% of FNMT3009 water-based epoxy emulsion, 2% of dispersant, 5% of manganese black Black B-260, 10% of mica powder, 5% of talc powder, 10% of glass powder, 0.3% of defoamer, 0.5% of wetting defoamer, 0.2% of wetting agent, 14% of water, 0.5% of thickener, 0.3% of silane coupling agent and 2.2% of cosolvent.

4. The two-component silicone coating according to claim 1, characterized in that: The main agent comprises the following components in mass percentage: 55% of FNMT3009 water-based epoxy emulsion, 2% of dispersant, 5% of manganese black Black B-260, 10% of GA-4 mica powder, 5% of talc powder, 10% of glass powder, 0.3% of defoamer, 0.5% of wetting defoamer, 0.2% of wetting agent, 9% of water, 0.5% of thickener, 0.3% of silane coupling agent and 2.2% of cosolvent.

5. The two-component silicone coating according to claim 1, characterized in that: The main agent comprises the following components in mass percentage: 60% of FNMT3009 water-based epoxy emulsion, 2% of dispersant, 5% of manganese black Black B-260, 10% of mica powder, 5% of talc powder, 10% of glass powder, 0.3% of defoamer, 0.5% of wetting defoamer, 0.2% of wetting agent, 4% of water, 0.5% of thickener, 0.3% of silane coupling agent and 2.2% of cosolvent.

6. The two-component silicone coating according to any one of claims 1 to 5, characterized in that: The cosolvent is dipropylene glycol butyl ether.

7. The two-component silicone coating according to any one of claims 1 to 5, characterized in that: The mica powder is GA-4 mica powder.

8. The two-component silicone coating according to any one of claims 1 to 5, characterized in that: The mass ratio of the main agent to the curing agent is 5:

1.

9. The two-component silicone coating according to claim 1, characterized in that: The curing agent comprises the following components in percentage by mass: 75% of organic silicon curing agent, 20% of water and 5% of anti-flash rust agent.

10. Use of the ultra-high salt spray resistant two-component silicone coating according to any one of claims 1 to 9 in the field of coatings.

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