阅读说明：本技术 一种水性环氧石墨烯含锌防腐底漆 (Waterborne epoxy graphene zinc-containing anticorrosive primer ) 是由 江拥 解宝盛 于 2020-07-31 设计创作，主要内容包括：本发明公开了一种水性环氧石墨烯含锌防腐底漆,属于涂料技术领域。该底漆包括组分A和组分B；所述组分A包括：水性环氧富锌树脂、钛白粉、碳黑、锌粉、纳米硫酸钡、铬酸锶、分散剂、消泡剂、润湿剂、气相二氧化硅、有机膨润土、助溶剂；所述组分B包括：水性环氧富锌固化剂、功能化石墨烯。本发明通过制备功能化石墨烯,并将其用于水性涂料,可以对基材提供超强的防腐蚀作用。本发明的涂料可用于铁路支座、铁路桥梁、铁路机车、公路支座、公路桥梁、石油储罐、石油管道、天然气管道、石油设备、工程机械、车辆、变压器等不同领域行业。(The invention discloses a waterborne epoxy graphene zinc-containing anticorrosive primer, and belongs to the technical field of coatings. The primer comprises a component A and a component B; the component A comprises: the paint comprises waterborne epoxy zinc-rich resin, titanium dioxide, carbon black, zinc powder, nano barium sulfate, strontium chromate, a dispersing agent, a defoaming agent, a wetting agent, fumed silica, organic bentonite and a cosolvent; the component B comprises: a water-based epoxy zinc-rich curing agent and functionalized graphene. According to the invention, the functionalized graphene is prepared and used for the water-based coating, so that the super-strong anticorrosion effect can be provided for the base material. The coating can be used in the industries of different fields such as railway supports, railway bridges, railway locomotives, highway supports, highway bridges, petroleum storage tanks, petroleum pipelines, natural gas pipelines, petroleum equipment, engineering machinery, vehicles, transformers and the like.)

1. The water-based epoxy graphene zinc-containing anticorrosive primer is characterized by comprising the following components in parts by weight: comprises a component A and a component B;

the component A comprises the following components in percentage by weight: 15-25% of water-based epoxy zinc-rich resin, 5-10% of titanium dioxide, 0.2-0.5% of carbon black, 30-50% of zinc powder, 8-10% of nano barium sulfate, 3-8% of strontium chromate, 0.3-0.8% of dispersing agent, 0.3-0.6% of defoaming agent, 0.1-0.2% of wetting agent, 0.5-1% of fumed silica, 0.5-1% of organic bentonite and 14-16.7% of cosolvent;

the component B comprises the following components in percentage by weight: 85-90% of water-based epoxy zinc-rich curing agent and 10-15% of functionalized graphene.

2. The primer of claim 1, wherein: the cosolvent is a mixture of ethylene glycol monobutyl ether and ethanol.

3. The primer of claim 1, wherein: the functionalized graphene is prepared by the following method:

preparing a K containing 0.3-0.5 mol/L₂Cr₂O₇Adding 0.5-0.8 g/L of graphene into an aqueous solution of 1.2-1.5 mol/L HCl, uniformly stirring, reacting at 82-86 ℃ for 3-5 h, filtering out solids after the reaction is finished, cleaning with deionized water, and drying to obtain surface-activated graphene; acetone is used as a reaction solvent, 2-5 wt% of graphene with activated surfaces, 5-8 wt% of N, N-dihydroxyethyl-3-amino methyl acrylate and 10-15 wt% of a second waterborne epoxy curing agent are added, and then 0 is added.8-1.0 wt% of p-toluenesulfonic acid catalyst, dispersing uniformly under ultrasonic condition, evaporating under reduced pressure at 60-65 ℃ to remove solvent, and then adding N₂Stirring for 5-8 h under the protection condition at 40-45 ℃ for reaction, cleaning reactants with ethanol after the reaction is finished, and drying in vacuum to obtain hyperbranched modified graphene; and preparing an aqueous solution containing 10-16 wt% of hyperbranched modified graphene and 1-1.5 wt% of sodium polycarboxylate dispersant, and uniformly dispersing to obtain the aqueous functional graphene slurry.

4. The primer of claim 1, wherein: the preparation method of the component A comprises the following steps:

step 1, adding the waterborne epoxy zinc-rich resin, the dispersant, the defoamer and the cosolvent into a production cylinder, and stirring for 5 minutes at 800 rpm under 600-;

step 2, slowly adding titanium dioxide, carbon black, nano barium sulfate, strontium chromate, organic bentonite and fumed silica while stirring, and stirring for 5-10 minutes at 1000 revolutions/minute by adopting 800-;

step 3, grinding the mixture by a sand mill until the fineness of the mixture is 50 microns;

and step 4, adding zinc powder while stirring at 800 revolutions per minute of 600 plus materials, and dispersing for 15-20 minutes at 1200 revolutions per minute of 1000 plus materials.

5. The primer of claim 1, wherein: the dosage ratio of the component A to the component B is 100: 10.

Technical Field

The invention belongs to the technical field of coatings, and particularly relates to a waterborne epoxy graphene zinc-containing anticorrosive primer

Background

With the gradual improvement of environmental requirements, oily paint is gradually coated by water-based paint and solvent-free paint, but the prior water-based paint technology is still not superior to the performance and effect of oily paint to a great extent, for example, epoxy anticorrosive primer of anticorrosive system, the anticorrosive performance of water-based epoxy anticorrosive paint is far inferior to that of oily epoxy anticorrosive paint, so how to break through the difficulty of poor water-based anticorrosive performance needs to be further studied.

Graphene is a carbon thin plate with only one atomic thickness, when contacting water or steam, the coating plays a role of a molecular sieve, small molecules below a certain size are allowed to pass through, tens of millions of tiny flakes are arranged inside the coating and stacked together in a disordered way, and nanometer-sized capillary gaps are reserved among the flakes, so that the contact of water or steam and the metal surface is greatly prevented, the function of completely isolating is achieved, and the effect of protecting the metal is achieved. Meanwhile, the graphene coating is more firm in mechanics and completely impermeable to gas, liquid and chemicals, so that the graphene coating has excellent strong acid and alkali resistance.

Disclosure of Invention

The invention provides a waterborne epoxy graphene zinc-containing anticorrosive primer, which can provide a super-strong anticorrosive effect on a base material by preparing functionalized graphene and applying the functionalized graphene to a waterborne coating.

In order to achieve the purpose, the invention adopts the following technical scheme:

a waterborne epoxy graphene zinc-containing anticorrosive primer comprises a component A and a component B;

the component A comprises the following components in percentage by weight: 15-25% of water-based epoxy zinc-rich resin, 5-10% of titanium dioxide, 0.2-0.5% of carbon black, 30-50% of zinc powder, 8-10% of nano barium sulfate, 3-8% of strontium chromate, 0.3-0.8% of dispersing agent, 0.3-0.6% of defoaming agent, 0.1-0.2% of wetting agent, 0.5-1% of fumed silica, 0.5-1% of organic bentonite and 14-16.7% of cosolvent;

the component B comprises the following components in percentage by weight: 85-90% of water-based epoxy zinc-rich curing agent and 10-15% of functionalized graphene.

Further, the cosolvent is a mixture of ethylene glycol monobutyl ether and ethanol.

Further, the functionalized graphene is prepared by the following method:

preparing a K containing 0.3-0.5 mol/L₂Cr₂O₇Adding 0.5-0.8 g/L of graphene into an aqueous solution of 1.2-1.5 mol/L HCl, uniformly stirring, reacting at 82-86 ℃ for 3-5 h, filtering out solids after the reaction is finished, cleaning with deionized water, and drying to obtain surface-activated graphene; acetone is used as a reaction solvent, and 2-5 wt% of surface-activated graphene and 5E to E8wt% of N, N-dihydroxyethyl-3-amino methyl acrylate and 10-15 wt% of second waterborne epoxy curing agent, then 0.8-1.0 wt% of p-toluenesulfonic acid catalyst is added, after uniform dispersion under ultrasonic condition, solvent is removed through reduced pressure evaporation at 60-65 ℃, and then N is added₂Stirring for 5-8 h under the protection condition at 40-45 ℃ for reaction, cleaning reactants with ethanol after the reaction is finished, and drying in vacuum to obtain hyperbranched modified graphene; and preparing an aqueous solution containing 10-16 wt% of hyperbranched modified graphene and 1-1.5 wt% of sodium polycarboxylate dispersant, and uniformly dispersing to obtain the aqueous functional graphene slurry.

Further, the preparation method of the component A comprises the following steps:

step 1, adding the waterborne epoxy zinc-rich resin, the dispersant, the defoamer and the cosolvent into a production cylinder, and stirring for 5 minutes at 800 rpm under 600-;

step 2, slowly adding titanium dioxide, carbon black, nano barium sulfate, strontium chromate, organic bentonite and fumed silica while stirring, and stirring for 5-10 minutes at 1000 revolutions/minute by adopting 800-;

step 3, grinding the mixture by a sand mill until the fineness of the mixture is 50 microns;

and step 4, adding zinc powder while stirring at 800 revolutions per minute of 600 plus materials, and dispersing for 15-20 minutes at 1200 revolutions per minute of 1000 plus materials.

Further, the using ratio of the component A to the component B is 100: 10.

according to the invention, the functionalized graphene is prepared and used for the water-based coating, so that the super-strong anticorrosion effect can be provided for the base material. The coating can be used in the industries of different fields such as railway supports, railway bridges, railway locomotives, highway supports, highway bridges, petroleum storage tanks, petroleum pipelines, natural gas pipelines, petroleum equipment, engineering machinery, vehicles, transformers and the like.

Detailed Description

The technical solution of the present invention is further described with reference to the following specific embodiments.

The invention designs functionalized graphene, and the preparation method specifically comprises the following steps: preparing a K containing 0.3-0.5 mol/L₂Cr₂O₇Adding 0.5-0.8 g/L of graphene into an aqueous solution of 1.2-1.5 mol/L HCl, uniformly stirring, reacting at 82-86 ℃ for 3-5 h, filtering out solids after the reaction is finished, cleaning with deionized water, and drying to obtain surface-activated graphene; taking acetone as a reaction solvent, adding 2-5 wt% of graphene with activated surface, 5-8 wt% of N, N-dihydroxyethyl-3-amino methyl acrylate and 10-15 wt% of second waterborne epoxy curing agent, adding 0.8-1.0 wt% of p-toluenesulfonic acid catalyst, dispersing uniformly under an ultrasonic condition, evaporating under reduced pressure at 60-65 ℃ to remove the solvent, and then adding N₂Stirring for 5-8 h under the protection condition at 40-45 ℃ for reaction, cleaning reactants with ethanol after the reaction is finished, and drying in vacuum to obtain hyperbranched modified graphene; and preparing an aqueous solution containing 10-16 wt% of hyperbranched modified graphene and 1-1.5 wt% of sodium polycarboxylate dispersant, and uniformly dispersing to obtain the aqueous functional graphene slurry.

The following examples used the following starting materials:

water-borne epoxy resin (110W Buddha mountain codex)

Titanium white powder (257 climbing steel titanium white)

Carbon black (MA-100 Japan Mitsubishi)

Functional graphene (self-made)

Nano barium sulfate (BS80 Beijing golden zebra)

Dispersant (4599S Effkoner)

Antifoaming agent (2507 Effkoner)

Wetting agent (4100 digao)

Strontium chromate (L203E slurry chemical)

Organic bentonite (SD Hai Ming Si)

Fumed silica (R972 Drissa)

Cosolvent 1 (ethylene glycol monobutyl ether medium petrifaction)

Cosolvent 2 (ethanol middle petrifaction)

Water-based epoxy hardener (150Y Foshan Tongde)