Graphene modified polyaspartic acid ester zinc-containing coating and preparation method thereof
An aspartate and graphene modification technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of low construction efficiency, excessive VOC emissions, large solvent volatilization, etc. The effect of improved efficiency, strong covering ability and long corrosion path
Inactive Publication Date: 2020-12-29
湘江涂料科技有限公司
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- Abstract
- Description
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Problems solved by technology
Although the coating improves the anti-corrosion effect while greatly reducing the content of zinc powder through the selection of various components, it overcomes the anti-corrosion method of zinc-rich coatings at the expense of zinc powder, and greatly reduces the oxidation produced during welding. Zinc mist is environmentally friendly. However, due to the single selection of film-forming substances and the filler itself has no anti-rust effect, the resulting coating has poor mechanical properties, adhesion level 2, flexibility 5mm, impact strength 40cm, hardness 2HB , the salt spray resistance performance is 500-1000h, the performance needs to be further improved, and the potential application field is narrow; and the method is ground by a three-roll mill to prepare the graphene anti-corrosion coating component A, the grinding process is open, and the solvent volatilization is large , not only seriously pollute the production space, resulting in excessive VOC emissions, but also the amount of volatile solvents in the formula is uncontrollable, the VOC is high, and the stability of industrial production cannot be guaranteed
[0007] CN105623471A discloses an epoxy resin-graphene-zinc powder anticorrosion coating and a preparation method thereof. A single bisphenol-A type epoxy resin and a polyamide curing agent are selected as coating film-forming substances, and a high-speed disperser is used to prepare a A kind of epoxy resin-graphene-zinc powder anticorrosion coating, though greatly reduced the content of zinc powder,,, because film-forming material is selected improperly, the coating anticorrosion performance of this method preparation is relatively poor, and adhesion is 0~1 level, The flexibility is grade 1~2, and the salt spray resistance time is only 600h
It is also an epoxy resin coating, which has the disadvantages of slow drying speed, high VOC content, and low construction efficiency.
Method used
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Embodiment 1～3
[0039] The parts by weight of each raw material are as shown in Table 1:
[0040] Table 1 Graphene-modified polyaspartic ester zinc-containing coating embodiment 1~3 weight part list of each raw material
[0041]
[0042]
[0043] Note: "-" in the table means not added.
Embodiment 1
[0045] (1) Preparation of Component A: According to the parts by weight of the raw materials described in Example 1 of Table 1, mix and stir the polyaspartic ester resin with an organic solvent and a dispersant evenly to form a clear solution, and add graphite in a stirring state olefin, at 800r / min, disperse for 15min, then add iron oxide red, spherical zinc powder, flake zinc powder, phosphorus iron powder, leveling agent, anti-settling agent, at 1500r / min, high-speed Disperse for 30 minutes until the fineness is ≤40μm, and it is ready;
[0046] (2) Preparation of component B: mix N3900 and N3600 evenly according to the weight parts of the raw materials described in Table 1, Example 1, and it is ready;
[0047] (3) When using, mix component A obtained in step (1) with component B obtained in step (2) according to the mass ratio of 11:1, and it is ready.
[0048] Preparation method embodiment 2
[0049] (1) Preparation of Component A: According to the parts by weight of the...
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Abstract
The invention relates to a graphene modified polyaspartic acid ester zinc-containing coating and a preparation method thereof. The coating comprises a component A capable of curing to form a film anda component B containing a curing agent, the component A comprises high solid content low viscosity polyaspartic acid ester resin, an organic solvent, a dispersant, graphene, zinc powder, an antirustpigment, a leveling agent and an anti-settling agent; and the component B is isocyanate or a mixture of isocyanate and an organic solvent. The graphene modified polyaspartic acid ester zinc-containingcoating belongs to an environment-friendly green product, is higher in drying speed compared with an existing common epoxy zinc powder coating, and can meet the wet-to-wet spraying process requirements, and the one-time film forming thickness can reach 120 [mu]m or above, so that the construction efficiency is greatly improved; the salt spray resistance is better, and the adhesive force is good;the method provided by the invention is environment-friendly in production process, simple in process, free of sanding process, low in cost and beneficial to industrial large-scale production.
Description
technical field [0001] The invention relates to a zinc-containing anticorrosion coating and a preparation method thereof, in particular to a graphene-modified polyaspartate zinc-containing coating and a preparation method thereof. Background technique [0002] Epoxy zinc-rich primer is commonly used in industrial heavy-duty anti-corrosion coating systems. It relies on cathodic protection and passivation, and has good anti-rust and anti-corrosion effects. When the zinc powder content in the dry film is 70%, the salt spray resistance time is 400 ~600h; however, a large amount of zinc powder needs to be added to the formula, which increases the product cost, consumes a lot of zinc powder, low utilization rate, metal zinc fails too quickly, and produces a large amount of "zinc fog" during cutting and welding, polluting the environment and endangering workers Healthy, resulting in a waste of resources, according to estimates, the global reserves of zinc powder will be exhausted i...
Claims
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IPC IPC(8): C09D175/04C09D5/10C09D7/61
CPCC08K2003/0893C08K2003/2272C09D5/106C09D175/04C09D7/61C08K3/042C08K3/08C08K7/00C08K7/18C08K3/22C08K13/04
Inventor 刘寿兵许愔徐祥麟张爱元曹树印熊宽刘志
Owner 湘江涂料科技有限公司
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