阅读说明：本技术 一种纳米钛改性鳞片锌粉防腐涂料及其制备方法 (Nano titanium modified flaky zinc powder anticorrosive paint and preparation method thereof ) 是由 张全章 于 2021-08-04 设计创作，主要内容包括：本发明公开了一种纳米钛改性鳞片锌粉防腐涂料及其制备方法,其中纳米钛改性鳞片锌粉防腐涂料,其特征在于按重量份包括以下组分：环氧树脂30-65份、鳞片锌粉20-50份、有机膨润土3-8份、γ-氨丙基三乙氧基硅烷3-12份、纳米钛1-5份、纳米二氧化钛5-10份、氟碳乳液5-15份、固化剂8-20份、溶剂10-50份。本发明组分及含量合适,通过加入纳米钛、鳞片锌粉,有效提高涂料防腐性和力学性能；同时可以增加鳞片锌粉涂层的导电性,进一步提高漆膜电化学防腐效果。(The invention discloses a nano titanium modified flaky zinc powder anticorrosive paint and a preparation method thereof, wherein the nano titanium modified flaky zinc powder anticorrosive paint is characterized by comprising the following components in parts by weight: 30-65 parts of epoxy resin, 20-50 parts of flake zinc powder, 3-8 parts of organic bentonite, 3-12 parts of gamma-aminopropyl triethoxysilane, 1-5 parts of nano titanium, 5-10 parts of nano titanium dioxide, 5-15 parts of fluorocarbon emulsion, 8-20 parts of curing agent and 10-50 parts of solvent. The components and the content are proper, and the corrosion resistance and the mechanical property of the coating are effectively improved by adding the nano titanium and the flaky zinc powder; meanwhile, the conductivity of the flake zinc powder coating can be increased, and the electrochemical anticorrosion effect of the paint film is further improved.)

1. A nano titanium modified flake zinc powder anticorrosive paint is characterized by comprising the following components in parts by weight: 30-65 parts of epoxy resin, 20-50 parts of flake zinc powder, 3-8 parts of organic bentonite, 3-12 parts of gamma-aminopropyl triethoxysilane, 1-5 parts of nano titanium, 5-10 parts of nano titanium dioxide, 5-15 parts of fluorocarbon emulsion, 8-20 parts of curing agent and 10-50 parts of solvent.

2. The nano titanium modified flake zinc powder anticorrosive paint of claim 1, characterized in that the epoxy resin is one or a mixture of two or more of bisphenol F epoxy resin, hydrogenated bisphenol A epoxy resin, hydroxymethyl bisphenol A epoxy resin, bromine modified diphenol propane epoxy resin, and graphene modified epoxy resin.

3. The nano titanium modified flake zinc powder anticorrosive paint of claim 1, characterized in that the graphene modified epoxy resin is prepared by the following method: putting 1-10 parts of graphene and 90-99 parts of epoxy resin into a dispersion tank for mixing according to parts by weight, simultaneously adding 0.1-0.5 part of BYK-110 dispersant and 0.2-1.5 part of sodium dodecyl benzene sulfonate for high-speed dispersion, adding sand grinding beads after uniform dispersion, and grinding the slurry until the fineness is less than or equal to 10 microns.

4. The nano titanium modified flake zinc powder anticorrosive paint as claimed in claim 1, wherein the flake zinc powder is HD-ZA type flake zinc powder.

5. The nano titanium modified flake zinc powder anticorrosive paint of claim 1, characterized in that the curing agent is an amine curing agent.

6. The nano titanium modified flake zinc powder anticorrosive paint of claim 5, characterized in that the amine curing agent is one or a mixture of two or more of ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, N' -diethylaminopropylamine, epigallodiamine, and β -hydroxyethyl ethylenediamine.

7. The nano titanium modified flake zinc powder anticorrosive paint of claim 1, characterized in that the solvent is an ester solvent or an alcohol solvent.

8. The nano titanium modified flake zinc powder anticorrosive paint of claim 7, characterized in that the lipid solvent is one of ethyl acetate, butyl acetate, amyl acetate, ethyl acetate, butyl acetate or isopropyl acetate.

9. The nano titanium modified flake zinc powder anticorrosive paint of claim 7, characterized in that the alcohol solvent is one of methanol, ethanol, benzyl alcohol, and ethylene glycol.

10. A method for preparing the nano titanium modified flake zinc powder anticorrosive paint as defined in any one of claims 1 to 9, which is characterized by comprising the following steps:

s1, slowly dripping fluorocarbon emulsion into epoxy resin, heating to 60-80 ℃, reacting at constant temperature for 10-40 minutes, cooling to 40-50 ℃, adding nano titanium dioxide, and performing ultrasonic treatment for 15-20 minutes to obtain mixed emulsion;

s2, removing oil and drying the flake zinc powder, adding nano titanium, stirring and grinding for 10-35 minutes in a grinder, filtering and drying to obtain nano titanium modified flake zinc powder;

s3, adding the mixed emulsion obtained in the step S1, the modified flake zinc powder and the organic bentonite obtained in the step S2, the gamma-aminopropyl triethoxysilane, the curing agent and the solvent into a stirring container, and dispersing at a high speed of 900-1400 rpm for 1-3 hours.

Technical Field

The invention relates to the technical field of anticorrosive coatings, in particular to a nano titanium modified flaky zinc powder anticorrosive coating and a method for preparing the nano titanium modified flaky zinc powder anticorrosive coating.

Background

The zinc-rich coating is widely used for corrosion prevention of pipelines, bridges, vehicles, chemical equipment, ships and the like. The zinc-rich paint can be divided into organic zinc-rich paint and inorganic zinc-rich paint according to different film-forming substances. The epoxy zinc-rich paint is the most important one of the organic zinc-rich paints. The zinc in the epoxy zinc-rich paint can play a role in sacrificial anode protection because the electrode potential of the zinc is lower than that of the iron; on the other hand, the epoxy zinc-rich coating also hinders the penetration of corrosive media, so that the epoxy zinc-rich coating has very good anticorrosion effect.

However, the existing epoxy zinc-rich paint has some problems in application, on one hand, because the zinc powder has large relative density and is extremely easy to sink in epoxy resin, the adhesion force and the uniformity of the paint during coating are poor; the overall conductivity is not uniform; on the other hand, the zinc content in the existing zinc-rich coating is generally more than 70 percent, so that the coating has the mechanical performance defects of brittleness, poor impact resistance and the like.

Therefore, the existing nano titanium modified flake zinc powder anticorrosive paint and the preparation method thereof are to be further perfected.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, provides a coating with proper components and content, and effectively improves the corrosion resistance and mechanical property of the coating by adding nano titanium and flaky zinc powder; meanwhile, the conductivity of the flake zinc powder coating can be increased, and the electrochemical corrosion prevention effect of the paint film is further improved.

The invention also aims to provide a method for preparing the nano titanium modified flake zinc powder anticorrosive paint.

For the nano titanium modified flake zinc powder anticorrosive paint, in order to achieve the purpose, the invention adopts the following scheme: a nano titanium modified flake zinc powder anticorrosive paint is characterized by comprising the following components in parts by weight: 30-65 parts of epoxy resin, 20-50 parts of flake zinc powder, 3-8 parts of organic bentonite, 3-12 parts of gamma-aminopropyl triethoxysilane, 1-5 parts of nano titanium, 5-10 parts of nano titanium dioxide, 5-15 parts of fluorocarbon emulsion, 8-20 parts of curing agent and 10-50 parts of solvent.

As another improvement of the nano titanium modified flake zinc powder anticorrosive coating, the epoxy resin is one or a mixture of more than two of bisphenol F epoxy resin, hydrogenated bisphenol A epoxy resin, hydroxymethyl bisphenol A epoxy resin, bromine modified diphenol propane epoxy resin and graphene modified epoxy resin.

As another improvement of the nano titanium modified flake zinc powder anticorrosive paint, the graphene modified epoxy resin is prepared by the following method: putting 1-10 parts of graphene and 90-99 parts of epoxy resin into a dispersion tank for mixing according to parts by weight, simultaneously adding 0.1-0.5 part of BYK-110 dispersant and 0.2-1.5 part of sodium dodecyl benzene sulfonate for high-speed dispersion, adding sand grinding beads after uniform dispersion, and grinding the slurry until the fineness is less than or equal to 10 microns.

As another improvement of the nano titanium modified flaky zinc powder anticorrosive paint, the flaky zinc powder is HD-ZA type flaky zinc powder.

As another improvement of the nano titanium modified flaky zinc powder anticorrosive paint, the curing agent is an amine curing agent.

As another improvement of the nano titanium modified flake zinc powder anticorrosive coating, the amine curing agent is one or a mixture of more than two of ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, N' -diethylaminopropylamine, epigallodiamine and beta-hydroxyethyl ethylenediamine.

As another improvement of the nano titanium modified flake zinc powder anticorrosive paint, the solvent is an ester solvent or an alcohol solvent.

As another improvement of the nano titanium modified flake zinc powder anticorrosive paint, the lipid solvent is one of ethyl acetate, butyl acetate, amyl acetate, ethyl acetate, butyl acetate or isopropyl acetate.

As another improvement of the nano titanium modified flake zinc powder anticorrosive paint, the alcohol solvent is one of methanol, ethanol, benzyl alcohol and glycol.

In terms of the preparation method, in order to achieve the purpose, the invention adopts the following technical scheme: a method for preparing the nano titanium modified flake zinc powder anticorrosive paint as defined in any one of claims 1 to 9, which is characterized by comprising the following steps:

s1, slowly dripping fluorocarbon emulsion into epoxy resin, heating to 60-80 ℃, reacting at constant temperature for 10-40 minutes, cooling to 40-50 ℃, adding nano titanium dioxide, and performing ultrasonic treatment for 15-20 minutes to obtain mixed emulsion;

s2, removing oil and drying the flake zinc powder, adding nano titanium, stirring and grinding for 10-35 minutes in a grinder, filtering and drying to obtain nano titanium modified flake zinc powder;

s3, adding the mixed emulsion obtained in the step S1, the modified flake zinc powder and the organic bentonite obtained in the step S2, the gamma-aminopropyl triethoxysilane, the curing agent and the solvent into a stirring container, and dispersing at a high speed of 900-1400 rpm for 1-3 hours.

In summary, compared with the prior art, the invention has the beneficial effects that: the nano titanium modified flaky zinc powder anticorrosive paint disclosed by the invention is appropriate in components and content, so that the anticorrosive effect of a product is better than that of the traditional spherical zinc powder; the nano titanium modified flaky zinc powder anticorrosive paint is added with a proper amount of nano titanium powder, so that the corrosion resistance and mechanical property of the paint can be greatly improved, the conductivity of a flaky zinc powder coating can be increased, and the electrochemical corrosion prevention effect of a paint film is further improved. The product of the invention has the advantages of sedimentation of the placing part during the coating construction time, uniform coating and smooth finish surface, and can be used as a primer and a finish. The nano titanium modified flaky zinc powder anticorrosive coating disclosed by the invention is low in cost and stable in performance, has the specific functions of resisting corrosion of media such as acid and alkali, salt and the like, has the characteristics of oil resistance, water resistance, ageing resistance and the like, and is strong in adhesive force, good in impact resistance and good in flexibility. The nano titanium modified flake zinc powder anticorrosive paint can be used for anticorrosive decoration of chemical equipment, oil field pipelines, marine facilities, steel structures, doors and windows, escalators, storage tanks, containers, bridges, underground engineering and the like.

Detailed Description

The foregoing and additional features and advantages of the invention are described in more detail below with reference to specific embodiments.

Example 1

A nano titanium modified flake zinc powder anticorrosive paint comprises the following components in parts by weight: 30 parts of bisphenol F epoxy resin, 20 parts of HD-ZA type flaky zinc powder, 3 parts of organic bentonite, 3 parts of gamma-aminopropyltriethoxysilane, 1 part of nano titanium, 5 parts of nano titanium dioxide, 5 parts of fluorocarbon emulsion, 8 parts of ethylenediamine and 10 parts of ethyl acetate.

Example 2

A nano titanium modified flake zinc powder anticorrosive paint comprises the following components in parts by weight: 65 parts of hydrogenated bisphenol A epoxy resin, 50 parts of HD-ZA type flaky zinc powder, 8 parts of organic bentonite, 12 parts of gamma-aminopropyl triethoxysilane, 5 parts of nano titanium, 10 parts of nano titanium dioxide, 15 parts of fluorocarbon emulsion, 20 parts of diethylenetriamine and 50 parts of methanol.

Example 3

A nano titanium modified flake zinc powder anticorrosive paint comprises the following components in parts by weight: 50 parts of hydroxymethyl bisphenol A type epoxy resin, 35 parts of HD-ZA type flaky zinc powder, 5 parts of organic bentonite, 7 parts of gamma-aminopropyl triethoxysilane, 3 parts of nano titanium, 8 parts of nano titanium dioxide, 10 parts of fluorocarbon emulsion, 14 parts of beta-hydroxyethyl ethylenediamine and 30 parts of isopropyl acetate.

Example 4

A nano titanium modified flake zinc powder anticorrosive paint comprises the following components in parts by weight: the epoxy resin is 65 parts of a mixture of bisphenol F epoxy resin and bromine-modified diphenol propane epoxy resin, 50 parts of HD-ZA type flaky zinc powder, 8 parts of organic bentonite, 12 parts of gamma-aminopropyltriethoxysilane, 1 part of nano titanium, 5 parts of nano titanium dioxide, 15 parts of fluorocarbon emulsion, 10 parts of a mixture of ethylenediamine and N, N' -diethylaminopropylamine and 20 parts of ethylene glycol.

Example 5

A nano titanium modified flake zinc powder anticorrosive paint comprises the following components in parts by weight: 65 parts of graphene modified epoxy resin, 20 parts of HD-ZA type flaky zinc powder, 8 parts of organic bentonite, 12 parts of gamma-aminopropyltriethoxysilane, 1 part of nano titanium, 5 parts of nano titanium dioxide, 15 parts of fluorocarbon emulsion, 20 parts of N, N' -diethylaminopropylamine and 50 parts of amyl acetate.

The graphene modified epoxy resin is prepared by the following method: 5 parts of graphene and 95 parts of epoxy resin are put into a dispersion tank to be mixed according to the parts by weight, 0.1 part of BYK-110 dispersant and 0.2 part of sodium dodecyl benzene sulfonate are added to carry out high-speed dispersion, and after uniform dispersion, sand grinding beads are added to grind the slurry until the fineness is less than or equal to 10 mu m.

The nano titanium modified flake zinc powder anticorrosive paint in the embodiments 1 to 5 can be prepared by any one of the preparation methods in the embodiments 6 to 8.

Example 6

The invention discloses a preparation method of a nano titanium modified flake zinc powder anticorrosive paint, which comprises the following steps:

s1, slowly dripping fluorocarbon emulsion into epoxy resin, heating to 60 ℃, reacting at constant temperature for 10 minutes, cooling to 40 ℃, adding nano titanium dioxide, and carrying out ultrasonic treatment for 15 minutes to obtain mixed emulsion;

s2, removing oil and drying the flake zinc powder, adding nano titanium, stirring and grinding for 10 minutes in a grinder, filtering and drying to obtain nano titanium modified flake zinc powder;

s3, adding the mixed emulsion in the step S1, the modified flake zinc powder and the organic bentonite in the step S2, the gamma-aminopropyl triethoxysilane, the curing agent and the solvent into a stirring container, and dispersing at a high speed of 900rpm for 1 hour.

Example 7

The invention discloses a preparation method of a nano titanium modified flake zinc powder anticorrosive paint, which comprises the following steps:

s1, slowly dripping fluorocarbon emulsion into epoxy resin, heating to 80 ℃, reacting at constant temperature for 40 minutes, cooling to 50 ℃, adding nano titanium dioxide, and carrying out ultrasonic treatment for 20 minutes to obtain mixed emulsion;

s2, removing oil and drying the flake zinc powder, adding nano titanium, stirring and grinding for 35 minutes in a grinder, filtering and drying to obtain nano titanium modified flake zinc powder;

s3, adding the mixed emulsion obtained in the step S1, the modified flake zinc powder and the organic bentonite obtained in the step S2, the gamma-aminopropyl triethoxysilane, the curing agent and the solvent into a stirring container, and dispersing at a high speed of 1400rpm for 3 hours.

Example 8

The invention discloses a preparation method of a nano titanium modified flake zinc powder anticorrosive paint, which comprises the following steps:

s1, slowly dripping fluorocarbon emulsion into epoxy resin, heating to 70 ℃, reacting for 25 minutes at constant temperature, cooling to 45 ℃, adding nano titanium dioxide, and carrying out ultrasonic treatment for 18 minutes to obtain mixed emulsion;

s2, removing oil and drying the flake zinc powder, adding nano titanium, stirring and grinding for 10-35 minutes in a grinder, filtering and drying to obtain nano titanium modified flake zinc powder;

s3, adding the mixed emulsion obtained in the step S1, the modified flake zinc powder and the organic bentonite obtained in the step S2, the gamma-aminopropyl triethoxysilane, the curing agent and the solvent into a stirring container, and dispersing at a high speed of 1100rpm for 1-3 hours.

Comparative example 1

The epoxy zinc-rich primer comprises the following components in parts by weight: 45-75 parts of epoxy resin and 30-70 parts of zinc powder

5-10 parts of nano zinc oxide, 5-10 parts of nano silicon dioxide, 5-10 parts of nano titanium dioxide, 5-15 parts of emulsified asphalt, 5-10 parts of methyl potassium silicate, 10-20 parts of curing agent and 10-50 parts of solvent; wherein the epoxy resin is bisphenol F epoxy resin, the pH value of the emulsified asphalt is 10-12, the solid content is 20-40%, and the curing agent is ethylenediamine.

Comparative example 2

The epoxy micaceous iron paint comprises the following components in parts by weight: 50-80 parts of epoxy resin, 38-56 parts of mica iron oxide ash, 5-12 parts of superfine talcum powder, 8-15 parts of titanium dioxide, 15-30 parts of curing agent and 20-30 parts of solvent; wherein the epoxy resin is bisphenol F epoxy resin, and the curing agent is ethylenediamine.

The performance comparisons of the anticorrosive coatings prepared in examples 1 to 5 and comparative examples 1 to 2 are shown in the following table:

the foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.