阅读说明：本技术 一种水性石墨烯环氧富锌涂料制备方法 (Preparation method of water-based graphene epoxy zinc-rich coating ) 是由 郝玉峰 陆洪彬 徐海涛 于 2020-06-24 设计创作，主要内容包括：本技术发明提出一种水性石墨烯环氧富锌涂料及其制备方法,属于防腐涂料技术领域。该水性石墨烯环氧富锌涂料防腐蚀效果持久,其在附着力、热稳定性、机械性能和疏水性方面也性能优越,同时不含有游离甲醛,可以达到更安全环保的功效。该水性石墨烯环氧富锌涂料由以下组分按质量份制备而成：水性环氧树脂30~35份、锌粉30~50份、三聚磷酸铝5~8份、磷酸锌3~5份、其它颜填料6~8份、水性环氧固化剂3~5份和多功能助剂(分散剂：消泡剂：流平剂：硅烷偶联剂=3:1:1:1)0.5份、去离子水10~20份和石墨烯纳米片0.5份。本技术方案能够应用于室外金属部件的防腐、粉刷、涂覆。(The invention provides a water-based graphene epoxy zinc-rich paint and a preparation method thereof, belonging to the technical field of anticorrosive paints. The water-based graphene epoxy zinc-rich coating has a lasting anti-corrosion effect, is excellent in adhesive force, thermal stability, mechanical property and hydrophobicity, does not contain free formaldehyde, and can achieve the effects of being safer and more environment-friendly. The water-based graphene epoxy zinc-rich coating is prepared from the following components in parts by mass: 30-35 parts of water-based epoxy resin, 30-50 parts of zinc powder, 5-8 parts of aluminum tripolyphosphate, 3-5 parts of zinc phosphate, 6-8 parts of other pigments and fillers, 3-5 parts of water-based epoxy curing agent, 0.5 part of multifunctional auxiliary agent (dispersing agent: defoaming agent: leveling agent: silane coupling agent =3:1:1: 1), 10-20 parts of deionized water and 0.5 part of graphene nanosheet. The technical scheme can be applied to corrosion prevention, painting and coating of outdoor metal parts.)

1. A preparation scheme of a water-based graphene epoxy zinc-rich coating is characterized by mainly comprising the following parts: the preparation method comprises the following steps of preparation of water-based epoxy resin, preparation of a water-based epoxy curing agent, preparation of a water-based graphene epoxy zinc-rich coating and preparation of the water-based graphene epoxy zinc-rich coating.

2. The preparation method of the water-based graphene epoxy zinc-rich paint according to claim 1, wherein the epoxy diluent (AGE) and the epoxy resin (E51) are stirred to be uniform and transparent, and then Diethanolamine (DEOA) is added to obtain the modified epoxy resin.

3. The preparation method of the water-based graphene epoxy zinc-rich paint as claimed in claim 1 and claim 2, wherein the modified epoxy resin is neutralized by adding glacial acetic acid, and then the water-based epoxy resin is obtained by adding deionized water dropwise under stirring.

4. The preparation method of the water-based graphene epoxy zinc-rich paint according to the claim 1 and the claim 2 is characterized in that p-phenylenediamine (PPDA) is dissolved in propylene glycol methyl ether, modified epoxy resin is added dropwise under a stirring state, glacial acetic acid is used for neutralization, and deionized water is added to obtain the water-based epoxy curing agent.

5. The preparation method of the water-based epoxy zinc-rich paint as claimed in claim 1 and claim 3, wherein pigment and filler are added while stirring the water-based epoxy resin, and after the system is dispersed and ground, the auxiliary agent is added, and a proper amount of deionized water is added to obtain the component A.

6. The preparation scheme of the waterborne epoxy zinc-rich paint according to the claim 1, the claim 4 and the claim 5 is characterized in that the waterborne epoxy zinc-rich paint is prepared by adding the waterborne epoxy curing agent into the A component.

7. The preparation scheme of the aqueous epoxy zinc-rich paint as claimed in claim 1 and claim 6, wherein Graphene Nanoplatelets (GN) are added into the aqueous epoxy zinc-rich paint, and the mixture is ultrasonically stirred and ground to prepare the aqueous graphene epoxy zinc-rich paint.

Technical Field

The invention provides a water-based graphene epoxy zinc-rich paint and a preparation method thereof, belonging to the technical field of anticorrosive paints.

Background

With the rapid development of economy, the problems of air pollution and rainwater acidification are increasingly severe, and the problem of corrosion prevention of outdoor metal equipment is increasingly important. When different metals with different reactivities contact, the corrosion is accelerated compared with the reactive metals; factors such as dissolved oxygen, pH value and temperature in rainwater all affect the corrosion of equipment to a certain extent. Therefore, outdoor metal equipment has high requirements on the anticorrosive coating of the outdoor metal equipment. Economic loss caused by corrosion in China accounts for 3% -5% of GDP every year, and the corrosion loss in 2014 all the year round is more than 2.1 trillion yuan. The corrosion problem is more and more emphasized by people, and the development of novel and efficient anticorrosive materials has important practical significance and economic significance.

Since 2004, graphene has attracted much attention. The carbon nano material is a novel carbon nano material with the thickness of only one carbon atom layer, has better chemical inertness, and can stably exist in an oxidizing or corrosive environment. The addition of graphene into the anticorrosive coating can improve the anticorrosive performance of the coating.

By utilizing the technology, the environment-friendly high-performance water-based graphene epoxy zinc-rich paint without volatile organic matter emission can be prepared.

Disclosure of Invention

The invention aims to provide an anticorrosive coating, which is an environment-friendly high-performance water-based graphene epoxy zinc-rich coating prepared by optimizing various raw material components and process flows.

The technical scheme of the invention is as follows.

The technology comprises the preparation of water-based epoxy resin, the preparation of a water-based epoxy curing agent, the preparation of a water-based graphene epoxy zinc-rich paint, the preparation of modules of the water-based graphene epoxy zinc-rich paint and the like.

The preparation scheme of the waterborne epoxy resin is as follows: firstly, stirring the epoxy diluent and the epoxy resin E51 until the mixture is uniform and transparent, and then adding diethanolamine to obtain the modified epoxy resin. Then adding glacial acetic acid for neutralization, and dripping deionized water under the stirring state to obtain the water-based epoxy resin.

The preparation scheme of the waterborne epoxy curing agent is as follows: firstly, dissolving p-phenylenediamine in propylene glycol monomethyl ether, dropwise adding modified epoxy resin under the stirring state, neutralizing with glacial acetic acid, and adding deionized water to obtain the waterborne epoxy curing agent.

The preparation scheme of the water-based epoxy zinc-rich coating comprises the following steps: adding pigment and filler while stirring the waterborne epoxy resin, adding an auxiliary agent after the system is dispersed and ground, and adding a proper amount of deionized water to obtain the component A. And (3) adding an aqueous epoxy curing agent into the component A to prepare the aqueous epoxy zinc-rich coating.

The preparation scheme of the water-based graphene epoxy zinc-rich coating is as follows: and adding the graphene nanosheets into the water-based epoxy zinc-rich coating to prepare the water-based graphene epoxy zinc-rich coating.

The preparation scheme of the water-based graphene epoxy zinc-rich paint can achieve the purpose of improving the anti-corrosion performance of the paint by optimizing the dosage and preparation parameters of each raw material.

Drawings

The attached drawing is a preparation flow chart of the water-based graphene epoxy zinc-rich coating.

Wherein, FIG. 1 is a flow chart of the preparation of the waterborne epoxy resin, FIG. 2 is a flow chart of the preparation of the waterborne epoxy curing agent, and FIG. 3 is a flow chart of the preparation of the waterborne epoxy zinc-rich paint and the waterborne graphene epoxy zinc-rich paint.

Detailed Description

The invention is further described in detail below with reference to the accompanying drawings.