阅读说明：本技术 高耐盐雾水性爽滑涂料及其制备方法 (High-salt-spray-resistance water-based smooth coating and preparation method thereof ) 是由 杨勇 黄延青 于 2021-08-04 设计创作，主要内容包括：本发明涉及高耐盐雾水性爽滑涂料及其制备方法,属于水性工业涂料的技术领域。包括重量份的以下组分：水性环氧分散体35～60份,水性氨基树脂5～10份,助溶剂+助剂4～8份,爽滑剂5～10份,无机填料5～20份,防锈填料5～10份,颜料2～8份,蒸馏水10～20份,增稠剂0～1份。本发明通过使用特殊改性的水性环氧分散体与全甲醚化氨基树脂,极大提高了水性爽滑涂料的耐盐雾性能,有效保持爽滑性。(The invention relates to a high salt spray resistance water-based smooth coating and a preparation method thereof, belonging to the technical field of water-based industrial coatings. Comprises the following components in parts by weight: 35-60 parts of aqueous epoxy dispersion, 5-10 parts of aqueous amino resin, 4-8 parts of cosolvent and auxiliary agent, 5-10 parts of slipping agent, 5-20 parts of inorganic filler, 5-10 parts of antirust filler, 2-8 parts of pigment, 10-20 parts of distilled water and 0-1 part of thickening agent. According to the invention, the salt spray resistance of the water-based smooth coating is greatly improved and the smoothness is effectively maintained by using the specially modified water-based epoxy dispersoid and the fully methylated amino resin.)

1. The high-salt-spray-resistance water-based smooth coating is characterized by comprising the following components in parts by weight: 35-60 parts of aqueous epoxy dispersion, 5-10 parts of aqueous amino resin, 4-8 parts of cosolvent and auxiliary agent, 5-10 parts of slipping agent, 5-20 parts of inorganic filler, 5-10 parts of antirust filler, 2-8 parts of pigment, 10-20 parts of distilled water and 0-1 part of thickening agent.

2. The high salt spray resistance water-based smooth coating of claim 1, comprising the following components in parts by weight: 40 parts of waterborne epoxy dispersion, 6 parts of waterborne amino resin, 6.5 parts of cosolvent and auxiliary agent, 6 parts of slipping agent, 15 parts of inorganic filler, 8 parts of antirust filler, 6 parts of pigment, 12 parts of distilled water and 0.5 part of thickening agent.

3. The high salt spray resistance aqueous slip coating of claim 1, wherein the aqueous epoxy dispersion is a non-ionic aqueous dispersion of a solid bisphenol a epoxy resin.

4. The highly salt spray-resistant water-based slip coating according to claim 1, wherein the water-based amino resin is a fully methylated amino resin.

5. The high salt spray resistance aqueous slip coating of claim 1, wherein the adjuvant comprises at least one of a dispersant, an aqueous silicone defoamer, a leveling agent, and a substrate wetting agent; the cosolvent comprises at least one of ethylene glycol butyl ether and alcohol ester twelve.

6. The highly salt spray resistant water-borne slip coating of claim 1, wherein the slip agent is a fatty amide.

7. The highly salt spray resistant water-based slip coating of claim 1, wherein the rust inhibiting filler is at least one of zinc phosphate, aluminum trippolyhydroxyphosphate, and zinc molybdate.

8. The highly salt spray resistant water-based slip coating according to claim 1, wherein the inorganic filler is at least one of precipitated barium sulfate, talc, and sericite.

9. The high salt spray resistant water-based slip coating of claim 1, wherein the thickener is one or a combination of two of a polyurethane associative rheology aid and an alkaline thickening aid.

10. A method for preparing the high salt spray resistance water-based slip coating of claim 1, comprising the steps of:

(1) mixing and stirring inorganic filler, antirust filler, pigment, auxiliary agent and distilled water uniformly, and then putting the mixture into a sand mill for grinding to prepare a mixed solution A;

(2) uniformly mixing and stirring the aqueous epoxy dispersion, the aqueous amino resin, the slipping agent, the cosolvent and the thickening agent to prepare a mixed solution B;

(3) and (3) placing the mixed solution A into the mixed solution B, uniformly dispersing and filtering to obtain the high salt spray resistance water-based smooth coating.

Technical Field

The invention belongs to the technical field of water-based industrial coatings, and particularly relates to a high salt spray resistance water-based smooth coating and a preparation method thereof.

Background

With the increasing of environmental protection improvement strength in recent years, the water-based paint has become a research hotspot of the paint industry due to the excellent environmental protection effect and good performance, and has been developed rapidly. At present, the salt spray resistance of the related water-based slipping coating on the market is poor, and the problem of easy corrosion exists, so that the slipping performance is reduced and the like. How to ensure the smooth effect and improve the salt spray resistance becomes a research key.

Disclosure of Invention

Aiming at the problem of poor salt spray resistance of the water-based slipping coating in the prior art, the invention provides a high salt spray resistance water-based slipping coating and a preparation method thereof, so as to solve the problem. The invention is realized by using the specially modified aqueous epoxy dispersoid and the fully methylated amino resin to form a three-dimensional space network structure through high-temperature crosslinking reaction and endow a coating film with better performance. The ether exchange reaction is carried out between the alkoxy methyl in the amino resin and the hydroxyl of the epoxy resin, the crosslinking reaction is required to be completed at a certain temperature for curing and film forming, the defects that the resin is stacked and is not crosslinked in a thermoplastic film forming mode are overcome in a crosslinking thermosetting film forming mode, and the characteristics of salt spray resistance, water resistance, adhesive force, flexibility, hardness, hand perspiration resistance and the like of a film are effectively improved.

The technical scheme of the invention is as follows:

the high-salt-spray-resistance water-based smooth coating comprises the following components in parts by weight: 35-60 parts of aqueous epoxy dispersion, 5-10 parts of aqueous amino resin, 4-8 parts of cosolvent and auxiliary agent, 5-10 parts of slipping agent, 5-20 parts of inorganic filler, 5-10 parts of antirust filler, 2-8 parts of pigment, 10-20 parts of distilled water and 0-1 part of thickening agent.

Preferably, the composition comprises the following components in parts by weight: 40 parts of waterborne epoxy dispersion, 6 parts of waterborne amino resin, 6.5 parts of cosolvent and auxiliary agent, 6 parts of slipping agent, 15 parts of inorganic filler, 8 parts of antirust filler, 6 parts of pigment, 12 parts of distilled water and 0.5 part of thickening agent.

Preferably, the aqueous epoxy dispersion is a non-ionic aqueous dispersion of solid bisphenol A epoxy resin, and the dispersion has the characteristics of good adhesion, high hardness, strong toughness, excellent salt spray resistance and the like.

Preferably, the aqueous amino resin is a fully methylated amino resin.

Preferably, the auxiliary agent comprises at least one of a dispersing agent, a water-based organic silicon defoaming agent, a leveling agent and a substrate wetting agent; the cosolvent comprises at least one of ethylene glycol butyl ether and alcohol ester twelve.

Preferably, the slip agent is a fatty amide, such as erucamide, oleamide, and the like.

Preferably, the antirust filler is at least one of zinc phosphate, aluminum trippolyhydroxyphosphate and zinc molybdate.

Preferably, the pigment is carbon black, iron oxide red, phthalocyanine blue, phthalocyanine green, iron oxide yellow and the like.

Preferably, the inorganic filler is at least one of precipitated barium sulfate, talc powder and sericite.

Preferably, the thickener is one or a combination of two of polyurethane associative rheological additive and alkali thickening additive.

Another object of the present invention is to provide a method for preparing a water-based slip coating with high salt spray resistance, which comprises the following steps:

(1) mixing and stirring inorganic filler, antirust filler, pigment, auxiliary agent and distilled water uniformly, and then putting the mixture into a sand mill for grinding to prepare a mixed solution A;

(2) uniformly mixing and stirring the aqueous epoxy dispersion, the aqueous amino resin, the cosolvent, the slipping agent and the thickening agent to prepare a mixed solution B;

(3) and (3) placing the mixed solution A into the mixed solution B, uniformly dispersing and filtering to obtain the high salt spray resistance water-based smooth coating.

The invention has the beneficial effects that:

(1) the invention is realized by using the specially modified aqueous epoxy dispersoid and the fully methylated amino resin to form a three-dimensional space network structure through high-temperature crosslinking reaction and endow a coating film with better performance. The ether exchange reaction is carried out between the alkoxy methyl in the amino resin and the hydroxyl of the epoxy resin, the crosslinking reaction is required to be completed at a certain temperature for curing and film forming, the defects that the resin is stacked and is not crosslinked in a thermoplastic film forming mode are overcome in a crosslinking thermosetting film forming mode, and the characteristics of salt spray resistance, water resistance, adhesive force, flexibility, hardness, hand perspiration resistance and the like of a film are effectively improved. Greatly improves the salt spray resistance of the water-based smooth coating and effectively keeps the smoothness.

(2) The invention has simple manufacturing process, can realize batch production and saves resources and time.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The high-salt-spray-resistance water-based smooth coating comprises the following components in parts by weight:

40 parts of water-based epoxy dispersion, 6 parts of water-based amino resin, 1 part of dispersing agent, 0.3 part of water-based organic silicon defoaming agent, 0.3 part of flatting agent, 0.2 part of base material wetting agent, 2 parts of ethylene glycol butyl ether, 2.5 parts of alcohol ester dodeca, 5 parts of erucamide, 5 parts of zinc phosphate, 3 parts of aluminum trippolyhydroxyphosphate, 2 parts of zinc molybdate, 3 parts of carbon black, 6 parts of precipitated barium sulfate, 5 parts of talcum powder, 3 parts of sericite, 15 parts of distilled water, 0.2 part of polyurethane associated rheological aid and 0.5 part of alkali thickening aid.

The preparation method comprises the following steps:

(1) 6 parts of precipitated barium sulfate, 5 parts of talcum powder, 3 parts of sericite, 5 parts of zinc phosphate, 3 parts of aluminum trippolyhydroxyphosphate, 2 parts of zinc molybdate, 3 parts of carbon black, 1 part of dispersing agent, 0.3 part of water-based organic silicon defoamer, 0.3 part of flatting agent, 0.2 part of base material wetting agent and 15 parts of distilled water are mixed and stirred uniformly and then put into a sand mill for grinding to prepare a mixed solution A;

(2) uniformly mixing 40 parts of aqueous epoxy dispersion, 6 parts of aqueous amino resin, 5 parts of erucamide, 2 parts of ethylene glycol monobutyl ether, 2.5 parts of alcohol ester, 0.2 part of polyurethane associated rheological additive and 0.5 part of alkali thickening additive, and stirring to prepare a mixed solution B;

(3) and (3) placing the mixed solution A into the mixed solution B, uniformly dispersing and filtering to obtain the high salt spray resistance water-based smooth coating.

Example 2

The high-salt-spray-resistance water-based smooth coating comprises the following components in parts by weight:

40 parts of aqueous epoxy dispersoid, 6 parts of aqueous amino resin, 1 part of dispersing agent, 0.3 part of aqueous organic silicon defoamer, 0.3 part of flatting agent, 0.2 part of base material wetting agent, 2 parts of ethylene glycol butyl ether, 2.5 parts of alcohol ester dodeca, 5 parts of erucamide, 2 parts of zinc phosphate, 2 parts of aluminum trippolyhydroxyphosphate, 1 part of zinc molybdate, 3 parts of carbon black, 11 parts of precipitated barium sulfate, 5 parts of talcum powder, 3 parts of sericite, 15 parts of distilled water, 0.2 part of polyurethane associated rheological additive and 0.5 part of alkali thickening additive.

The preparation method comprises the following steps:

(1) 11 parts of precipitated barium sulfate, 5 parts of talcum powder, 3 parts of sericite, 2 parts of zinc phosphate, 2 parts of aluminum trippolyhydroxyphosphate, 1 part of zinc molybdate, 3 parts of carbon black, 1 part of dispersing agent, 0.3 part of water-based organic silicon defoamer, 0.3 part of flatting agent, 0.2 part of base material wetting agent and 15 parts of distilled water are mixed and stirred uniformly and then put into a sand mill for grinding to prepare a mixed solution A;

(2) uniformly mixing 40 parts of aqueous epoxy dispersion, 6 parts of aqueous amino resin, 5 parts of erucamide, 2 parts of ethylene glycol monobutyl ether, 2.5 parts of alcohol ester, 0.2 part of polyurethane associated rheological additive and 0.5 part of alkali thickening additive, and stirring to prepare a mixed solution B;

(3) and (3) placing the mixed solution A into the mixed solution B, uniformly dispersing and filtering to obtain the high salt spray resistance water-based smooth coating.

Example 3

The high-salt-spray-resistance water-based smooth coating comprises the following components in parts by weight:

48 parts of water-based epoxy dispersoid, 7 parts of water-based amino resin, 1 part of dispersing agent, 0.3 part of water-based organic silicon defoamer, 0.3 part of flatting agent, 0.2 part of base material wetting agent, 2 parts of ethylene glycol butyl ether, 3 parts of alcohol ester dodeca, 6 parts of oleamide, 5 parts of zinc phosphate, 3 parts of aluminum trippolyhydroxyphosphate, 2 parts of zinc molybdate, 3 parts of carbon black, 5 parts of talcum powder, 3 parts of sericite, 10 parts of distilled water, 0.2 part of polyurethane associated rheological additive and 0.5 part of alkali thickening additive.

The preparation method comprises the following steps:

(1) 5 parts of talcum powder, 3 parts of sericite, 5 parts of zinc phosphate, 3 parts of aluminum trippolyhydroxyphosphate, 2 parts of zinc molybdate, 3 parts of carbon black, 1 part of dispersing agent, 0.3 part of water-based organic silicon defoamer, 0.3 part of flatting agent, 0.2 part of base material wetting agent and 10 parts of distilled water are mixed, stirred uniformly and then put into a sand mill for grinding to prepare a mixed solution A;

(2) mixing 48 parts of aqueous epoxy dispersion, 7 parts of aqueous amino resin, 6 parts of oleamide, 2 parts of ethylene glycol butyl ether, twelve 3 parts of alcohol ester, 0.2 part of polyurethane associated rheological additive and 0.5 part of alkali thickening additive uniformly and stirring to prepare a mixed solution B;

(3) and (3) placing the mixed solution A into the mixed solution B, uniformly dispersing and filtering to obtain the high salt spray resistance water-based smooth coating.

Comparative example

The water-based smooth coating comprises the following components in parts by weight:

40 parts of water-based hydroxyl acrylic acid dispersoid, 6 parts of water-based amino resin, 1 part of dispersing agent, 0.3 part of water-based organic silicon defoaming agent, 0.3 part of flatting agent, 0.2 part of base material wetting agent, 2 parts of ethylene glycol butyl ether, 2.5 parts of alcohol ester dodeca, 5 parts of erucamide, 5 parts of zinc phosphate, 3 parts of aluminum trippolyhydroxyphosphate, 2 parts of zinc molybdate, 3 parts of carbon black, 6 parts of precipitated barium sulfate, 5 parts of talcum powder, 3 parts of sericite, 15 parts of distilled water, 0.2 part of polyurethane associative rheological additive and 0.5 part of alkali thickening additive.

The preparation method comprises the following steps:

(1) 6 parts of precipitated barium sulfate, 5 parts of talcum powder, 3 parts of sericite, 5 parts of zinc phosphate, 3 parts of aluminum trippolyhydroxyphosphate, 2 parts of zinc molybdate, 3 parts of carbon black, 1 part of dispersing agent, 0.3 part of water-based organic silicon defoamer, 0.3 part of flatting agent, 0.2 part of base material wetting agent and 15 parts of distilled water are mixed and stirred uniformly and then put into a sand mill for grinding to prepare a mixed solution A;

(2) uniformly mixing 40 parts of aqueous hydroxyl acrylic acid dispersoid, 6 parts of aqueous amino resin, 5 parts of erucamide, 2 parts of ethylene glycol monobutyl ether, 2.5 parts of alcohol ester, 0.2 part of polyurethane associated rheological additive and 0.5 part of alkali thickening additive, and stirring to prepare a mixed solution B;

(3) and (4) placing the mixed solution A into the mixed solution B, uniformly dispersing and filtering to obtain the water-based smooth coating.

Test example

The paint prepared in the embodiment 1-3 is subjected to performance detection, and the specific test results are shown in the following table 1:

TABLE 1 test results

Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.