A wear-resistant coating and a preparation method and application thereof

Abstract

The application discloses wear-resistant paint and a preparation method and application thereof, and relates to the field of paint. The wear-resistant paint comprises component A and component B. The component A comprises nanofibers, polyisocyanate, low-chlorine bisphenol F resin, a toughening agent and a defoaming agent. The component B comprises an amine curing agent and a polyether polyol. The nanofibers are silicon dioxide and / or di-aluminum trioxide. The toughening agent is at least one of phenolic hydroxyl polyphenyl ether, phenolic hydroxyl polyether sulfone and polyether imide. The low-chlorine bisphenol F resin is used to replace part of the polyisocyanate, and the raw material cost of a pure polyurethane system is lower. Meanwhile, the low-chlorine bisphenol F resin can reduce the corrosion degree of chloride ions on the base material of power equipment. The paint can meet the higher wear-resistant characteristics by adding a small amount of nanofibers, and the adhesion of the paint is not affected. Meanwhile, the whole system is a high solid component formula, the VOC emission is low, and the system is safe and environmentally friendly.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of paint, in particular to a kind of wear-resistant paint and its preparation method and application. BACKGROUND

[0002] With the high-speed development of the country, the construction of domestic scale is increasingly large, the environment of construction area is increasingly complex, and the structure is increasingly fine, in equipment and engineering facilities, structural material will suffer the damage of mechanical structure, greatly influence the service life of equipment and engineering facilities, therefore, high-end wear-resistant protective paint needs to be used to protect equipment and facilities.

[0003] At present, in the paint, by adding micron ceramic fiber to strengthen the wear resistance of paint, it is a commonly used technical scheme, however, the content of micron ceramic fiber added in the existing polyurethane system wear-resistant paint is often more than 15%, the high content of wear-resistant filler leads to high raw material cost, and it is easy to cause the poor adhesion of polyurethane system wear-resistant paint and substrate, the coating is easy to fall off and not durable, further increasing the maintenance cost. SUMMARY

[0004] The present application provides a kind of wear-resistant paint and its preparation method and application, to the problem of excessive filler content of wear-resistant coating affecting adhesion, improve the adhesion while improving the wear resistance of paint, and have lower raw material cost.

[0005] In order to solve the above technical problems, one of the purposes of the present application provides a kind of wear-resistant paint, which comprises component A and component B with a mass ratio of (3.5-5) : 1, the component A comprises 3-5 parts of nanofiber, 50-60 parts of polyisocyanate, 30-40 parts of low-chlorine bisphenol F resin, 3-5 parts of toughening agent and 0.5-1 part of defoaming agent; the component B comprises 60-70 parts of amine curing agent and 30-40 parts of polyether polyol; the nanofiber is silicon dioxide and / or aluminum oxide; the toughening agent is at least one of phenolic hydroxyl polyphenyl ether, phenolic hydroxyl polyether sulfone and polyether imide.

[0006] The present application adds low-chlorine bisphenol F resin and polyisocyanate to prepare an epoxy-modified polyurethane system, which has lower raw material cost than pure polyurethane system, and the low-chlorine bisphenol F resin can also reduce the corrosion degree of chloride ions on the substrate of electrical equipment, and the coating can meet the high wear resistance by adding a small amount of nanofiber, without affecting the adhesion of the coating, and the whole system is a high solid component formula (solid component content is more than 90%), with low VOC emission and safety and environmental protection.

[0007] As a preferred scheme, the wear-resistant paint further comprises 0.5-1 parts of anti-ultraviolet aid.

[0008] As a preferred solution, the anti-UV auxiliary agent is 2-hydroxy-4-n-octyloxybenzophenone and / or titanium dioxide.

[0009] As a preferred solution, the defoaming agent is at least one of isooctanol, polypropyl alcohol, tributyl phosphate, tributoxyethyl phosphate.

[0010] As a preferred solution, the amine curing agent is a condensate of one or both of hexamethylenetetramine and hexamethoxymethyl melamine.

[0011] As a preferred solution, the polyether polyol is at least one of Dow VORANOL CP450, Covestro 3900, Covestro 3901, BASF CH 1141C-A and F3056D.

[0012] As a preferred solution, the low-chlorine bisphenol F resin is at least one of Mitsubishi jER YL983U and / or Mitsubishi jER1750.

[0013] As a preferred solution, the polyisocyanate is at least one of toluene diisocyanate, diphenylmethane diisocyanate, polyphenylmethane polyisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, p / m-xylylene diisocyanate.

[0014] As a preferred solution, the low-chlorine bisphenol F resin has a chlorine content of 200-300 ppm.

[0015] As a preferred solution, the nanofiber has a diameter of 250-300 nm and a length of 1-1.5 mm.

[0016] To solve the above technical problems, a second object of the present application provides a preparation method of a wear-resistant coating, comprising the following steps: mixing raw materials in component A and stirring at a speed of 350-400 r / min for 1-3 h to obtain component A; mixing raw materials in component B and stirring at a speed of 350-400 r / min for 2-3 h to obtain component B.

[0017] To solve the above technical problems, a third object of the present application provides an application of the wear-resistant coating in the field of preparing protective coatings for power equipment or household electrical equipment.

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

[0019] The epoxy modified polyurethane system prepared in the application uses low-chlorine bisphenol F resin to replace part of the polyisocyanate, and has lower raw material cost than the pure polyurethane system, can meet the adhesion and protection functions of the coating, and the low-chlorine bisphenol F resin can also reduce the corrosion degree of chloride ions on the base material of the power equipment, and the coating can meet the higher wear resistance by adding a small amount of nanofiber, without affecting the adhesion of the coating, the whole system is a high solid component formula (solid component content is more than 90%), and the VOC emission is low, safe and environmentally friendly. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the application will be clearly and completely described below in combination with the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0021] Table 1-Source and model number of raw materials in the embodiments and comparative examples of the application

[0022]

[0023] Example 1

[0024] A wear-resistant coating, comprising components A and B in a mass ratio of 3.5:1, the component A comprising 3.5 kg of aluminum oxide fiber (diameter 300 nm, length 1 mm), 54 kg of toluene diisocyanate, 36 kg of low-chlorine bisphenol F resin, 5 kg of phenolic hydroxyl polyphenyl ether, 1 kg of tributyl phosphate, and 0.5 kg of titanium dioxide; the component B comprising 70 wt% of hexamethylenetetramine and 30 wt% of polyether polyol A; the preparation method comprising: mixing the raw materials in the component A, and stirring at a speed of 400 r / min for 2 h to obtain the component A; mixing the raw materials in the component B, and stirring at a speed of 400 r / min for 2 h to obtain the component B.

[0025] Example 2

[0026] A wear-resistant coating, comprising components A and B in a mass ratio of 4:1, the component A comprising 4.5 kg of silicon dioxide fiber (diameter 290 nm, length 1.5 mm), 55 kg of diphenylmethane diisocyanate, 35 kg of low-chlorine bisphenol F resin, 4 kg of polyetherimide, 0.5 kg of tributoxyethyl phosphate, and 1 kg of 2-hydroxy-4-n-octyloxybenzophenone; the component B comprising 65 wt% of hexamethoxymethyl melamine and 35 wt% of polyether polyol B; the preparation method comprising: mixing the raw materials in the component A, and stirring at a speed of 400 r / min for 2 h to obtain the component A; mixing the raw materials in the component B, and stirring at a speed of 400 r / min for 2 h to obtain the component B.

[0027] Comparative Example 1

[0028] A wear-resistant coating, comprising component A and component B in a mass ratio of 7:1, component A comprising 3.5 kg of aluminum oxide fiber (diameter 300 nm, length 1 mm), 90 kg of toluene diisocyanate, 5 kg of phenolic hydroxyl polyphenyl ether, 1 kg of tributyl phosphate, and 0.5 kg of titanium dioxide; component B being polyether polyol A; the preparation method being: mixing the raw materials in component A and stirring at a speed of 400 r / min for 2 h to obtain component A; mixing the raw materials in component B and stirring at a speed of 400 r / min for 2 h to obtain component B.

[0029] Comparative Example 2

[0030] A wear-resistant coating, comprising component A and component B in a mass ratio of 3.5:1, component A comprising 3.5 kg of basalt fiber (diameter 300 nm, length 1 mm), 54 kg of toluene diisocyanate, 36 kg of low-chlorine bisphenol F resin, 5 kg of phenolic hydroxyl polyphenyl ether, 1 kg of tributyl phosphate, and 0.5 kg of titanium dioxide; component B comprising 70 wt% of hexamethylenetetramine and 30 wt% of polyether polyol A; the preparation method being: mixing the raw materials in component A and stirring at a speed of 400 r / min for 2 h to obtain component A; mixing the raw materials in component B and stirring at a speed of 400 r / min for 2 h to obtain component B.

[0031] Comparative Example 3

[0032] A wear-resistant coating, comprising component A and component B in a mass ratio of 3.5:1, component A comprising 3.5 kg of aluminum oxide fiber (diameter 50 μm, length 1 mm), 54 kg of toluene diisocyanate, 36 kg of low-chlorine bisphenol F resin, 5 kg of phenolic hydroxyl polyphenyl ether, 1 kg of tributyl phosphate, and 0.5 kg of titanium dioxide; component B comprising 70 wt% of hexamethylenetetramine and 30 wt% of polyether polyol A; the preparation method being: mixing the raw materials in component A and stirring at a speed of 400 r / min for 2 h to obtain component A; mixing the raw materials in component B and stirring at a speed of 400 r / min for 2 h to obtain component B.

[0033] Comparative Example 4

[0034] A wear-resistant coating, comprising component A and component B in a mass ratio of 3.5:1, component A comprising 15 kg of aluminum oxide fiber (diameter 300 nm, length 1 mm), 54 kg of toluene diisocyanate, 36 kg of low-chlorine bisphenol F resin, 5 kg of phenolic hydroxyl polyphenyl ether, 1 kg of tributyl phosphate, and 0.5 kg of titanium dioxide; component B comprising 70 wt% of hexamethylenetetramine and 30 wt% of polyether polyol A; the preparation method is: mixing the raw materials in component A, stirring at a speed of 400 r / min for 2 h, to obtain component A; mixing the raw materials in component B, stirring at a speed of 400 r / min for 2 h, to obtain component B.

[0035] Comparative Example Five

[0036] A wear-resistant coating, comprising component A and component B in a mass ratio of 3.5:1, component A comprising 3.5 kg of aluminum oxide fiber (diameter 300 nm, length 1 mm), 54 kg of toluene diisocyanate, 36 kg of low-chlorine bisphenol F resin, 5 kg of dioctyl phthalate, 1 kg of tributyl phosphate, and 0.5 kg of titanium dioxide; component B comprising 70 wt% of hexamethylenetetramine and 30 wt% of polyether polyol A; the preparation method is: mixing the raw materials in component A, stirring at a speed of 400 r / min for 2 h, to obtain component A; mixing the raw materials in component B, stirring at a speed of 400 r / min for 2 h, to obtain component B.

[0037] Comparative Example Six

[0038] A wear-resistant coating, comprising component A and component B in a mass ratio of 3.5:1, component A comprising 3.5 kg of aluminum oxide fiber (diameter 300 nm, length 1 mm), 54 kg of toluene diisocyanate, 36 kg of bisphenol A resin, 5 kg of phenolic hydroxyl polyphenyl ether, 1 kg of tributyl phosphate, and 0.5 kg of titanium dioxide; component B comprising 70 wt% of hexamethylenetetramine and 30 wt% of polyether polyol A; the preparation method is: mixing the raw materials in component A, stirring at a speed of 400 r / min for 2 h, to obtain component A; mixing the raw materials in component B, stirring at a speed of 400 r / min for 2 h, to obtain component B.

[0039] Performance detection test

[0040] 1. The adhesion of the coating layer prepared from the examples and comparative examples was detected according to the ASTM D4541 standard, component A and component B in the wear-resistant coating were uniformly mixed and applied on the substrate to form a 20 μm thick coating layer, and then detected, and the detection results are shown in Table 2.

[0041] 2、The abrasion index of the paint coating prepared from the examples and the comparative examples was detected according to the standard of ASTM D4060, components A and B in the wear-resistant paint were mixed uniformly to form a 20 μm thick coating on a substrate, and then detected, and the detection results are shown in Table 2 below.

[0042] 3、The solid content of the paint prepared from the examples and the comparative examples was detected according to the standard of GB / T 1725-2007, and the detection results are shown in Table 2 below.

[0043] 4、The aging time of the paint coating of the examples and the comparative examples after 4 h ultraviolet irradiation (60±3℃) and 4 h condensation (50±3℃) alternately was detected according to the standard of ultraviolet accelerated aging test UVA-340, components A and B in the wear-resistant paint were mixed uniformly to form a 20 μm thick coating on a substrate, and then detected, and the detection results are shown in Table 2 below.

[0044] 5、The neutral salt spray test of the paint coating of the examples and the comparative examples was carried out according to the standard of GBT 2423.17-2008, components A and B in the wear-resistant paint were mixed uniformly to form a 20 μm thick coating on a substrate, and then detected, and the detection results are shown in Table 2 below.

[0045] Table 2 - Performance detection results of the examples and the comparative examples of the present application

[0046]

[0047] It can be known from the comparison of the performance detection results of examples 1 and comparative examples 1 and 6 in Table 2 above that the low-chlorine bisphenol F resin in comparative example 1 is not added, which is a pure polyurethane system, and the neutral salt spray test time and adhesion of the epoxy-modified polyurethane system of example 1 are reduced, indicating that the corrosion resistance and wear resistance are reduced. The low-chlorine bisphenol F resin in comparative example 2 is replaced by bisphenol A resin, and the adhesion of the paint coating is reduced, and the ultraviolet accelerated aging time is reduced, indicating that the weather resistance and adhesion of the paint are insufficient.

[0048] It can be known from the comparison of the performance detection results of examples 1 and comparative examples 2-4 in Table 2 above that the aluminum oxide fibers or silicon dioxide fibers added in the paint of the present application are nanoscale, which helps to improve the wear resistance of the paint, and can meet the wear resistance requirement under the premise of lower addition amount. Compared with the micrometer scale filler or other nanoscale fillers, it has more superior wear resistance and film forming effect.

[0049] It can be known from the comparison of the performance detection results of examples 1 and comparative example 5 in Table 2 above that comparative example 5 uses dioctyl phthalate as a toughening agent to replace phenolic hydroxyl polyphenyl ether, and compared with example 1, the paint is difficult to form a film due to large internal stress and brittle quality, which is not practical.

[0050] The above-described specific embodiments further illustrate the objects, technical solutions, and beneficial effects of the present application. It should be understood that the above-described specific embodiments are merely examples of the present application and are not intended to limit the protection scope of the present application. It is particularly pointed out that any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wear resistant coating, characterized in that, The abrasion-resistant coating comprises component A and component B with a mass ratio of (3.5-5):1, the component A comprises 3-5 parts of nanofiber, 50-60 parts of polyisocyanate, 30-40 parts of low-chlorine bisphenol F resin, 3-5 parts of toughening agent and 0.5-1 part of defoaming agent; the component B comprises 60-70 parts of amine curing agent and 30-40 parts of polyether polyol; the nanofiber is silicon dioxide and / or aluminum oxide; the toughening agent is at least one of phenolic hydroxyl polyphenyl ether, phenolic hydroxyl polyether sulfone and polyether imide; the low-chlorine bisphenol F resin has a chlorine content of 200-300 ppm; the nanofiber has a diameter of 250-300 nm and a length of 1-1.5 mm.

2. A wear resistant coating as claimed in claim 1, characterised in that, The abrasion-resistant coating further comprises 0.5-1 parts of anti-ultraviolet auxiliary agent.

3. A wear resistant coating as claimed in claim 2, characterised in that, The anti-ultraviolet auxiliary agent is 2-hydroxy-4-n-octyloxybenzophenone and / or titanium dioxide.

4. A wear-resistant coating as claimed in claim 1, characterised in that The defoaming agent is at least one of isooctanol, polypropyl alcohol, tributyl phosphate and tributoxyethyl phosphate.

5. A wear-resistant coating as claimed in claim 1, characterized in that The amine curing agent is a condensate of one or both of hexamethylene tetramine and hexamethoxymethyl melamine.

6. A wear-resistant coating as claimed in claim 1, characterized in that The polyisocyanate is at least one of toluene diisocyanate, diphenyl methane diisocyanate, polyphenyl methane polyisocyanate, hexamethylene diisocyanate, isophorone diisocyanate and p / m-xylylene diisocyanate.

7. A method for the production of a wear-resistant coating as claimed in any one of claims 1-6, characterized in that The method comprises the following steps: The raw materials in component A are mixed and stirred at a speed of 350-400 r / min for 1-3 h to obtain component A; The raw materials in component B are mixed and stirred at a speed of 350-400 r / min for 2-3 h to obtain component B.

8. Use of the abrasion-resistant coating according to any one of claims 1-6 in the field of preparing protective coatings for power equipment or household electrical equipment.

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