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A kind of waterborne epoxy graphene low zinc antirust primer

A water-based graphene and water-based epoxy technology, applied in epoxy resin coatings, anti-corrosion coatings, coatings, etc., can solve the problems of low concentration and poor stability of graphene dispersions, and achieve good anchoring effect, low surface tension, Volatile effect

Active Publication Date: 2020-09-04
明光科迪新材料有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the graphene dispersion prepared by these dispersants has low concentration and poor stability.

Method used

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  • A kind of waterborne epoxy graphene low zinc antirust primer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of ternary block copolymer anionic dispersant A, its steps are as follows:

[0035] In parts by weight, 25.0 parts of itaconic acid, 12.0 parts of sodium p-styrene sulfonate, 19.0 parts of methacryloxybutyl alcohol monophosphate, 1.6 parts of S, S'-bis(α,α' -Dimethyl-α"-acetic acid) trithiocarbonate, 80.0 parts of ethanol are added in the reaction kettle, logical N 2 Protection, start stirring and dissolve evenly, raise the temperature to 75°C, evenly add 10.0 parts of ethanol solution containing 10% azobisisobutyronitrile dropwise, finish dropping within 0.5h, keep at 75°C and continue the reaction for 6h; then slowly add 10 % NaOH solution and deionized water to adjust the pH to 7-8 to obtain the anionic dispersant A of the ternary block copolymer.

Embodiment 2

[0037] A kind of ternary block copolymer anionic dispersant B, its steps are as follows:

[0038] In parts by weight, 22.0 parts of itaconic acid, 13.0 parts of sodium p-styrenesulfonate, 15.0 parts of methacryloyloxyethyl alcohol monophosphate, 3.0 parts of 4,4'-dithiophenylacetic acid, 70.0 parts of Virahol joins in the reactor, logical N 2 Protection, start stirring and dissolve evenly, heat up to 70°C, add 8.0 parts of isopropanol solution containing 10% azobisisobutylamidine hydrochloride dropwise evenly, drop it within 0.5h, keep at 70°C to continue the reaction 6h; then slowly add 10% NaOH solution and deionized water to adjust the pH to 7-8 to obtain the anionic dispersant B of the ternary block copolymer.

[0039] The ternary block copolymer anionic dispersant technical index that makes in the embodiment of the present invention 1,2 is as shown in table 1:

[0040] Table 1 Ternary block copolymer anionic water-based dispersant technical indicators

[0041] ...

Embodiment 3

[0043] A 10% solid-containing aqueous graphene dispersion X, the preparation steps of which are as follows: add 38.5 parts of deionized water, 25.0 parts of ethanol, methyl 3-methoxypropionate to the dispersion tank according to the weight ratio of the formula 8.0 parts, 4.0 parts of wetting agent, 14.0 parts of ternary block copolymer anionic dispersant A, stir evenly, add 10.0 parts of graphene powder, disperse at 1000~1200r / min for 30~45min at high speed, and then move to nano sand The mill circulates and grinds for 6-12 hours until the particle size is D 50 <120nm, transfer to the adjusting tank, add 0.3 parts of pH adjuster and 0.2 parts of defoamer at 300-500r / min, stir for 20-30min, filter with 200 mesh filter, pack to get the water-based graphene Dispersion X.

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Abstract

The invention relates to a waterborne epoxy graphene low-zinc antirust primer. The waterborne epoxy graphene low-zinc antirust primer comprises a component A and a component B, wherein the component Ais composed of a waterborne epoxy curing agent, zinc powder, ferrophosphorus powder, a block copolymer dispersant, MMP, a graphene dispersion and an auxiliary agent; the component B is waterborne epoxy resin; the graphene dispersion is composed of MMP, ethanol, graphene, a block copolymer dispersant, etc.; and the block coplymer dispersant is prepared from itaconic acid, vinylbenzenesulfinic acidsodium salt, methacryloyloxy alkylol phosphomonoester, a RAFT reagent and an initiator through a reaction. The waterborne epoxy graphene low-zinc primer prepared by using the preparation method provided by the invention has excellent adhesion force, flash-rust resistance, corrosion resistance, oil resistance, water resistance, salt fog resistance and storage stability, is a low-VOC, low-zinc, environment-friendly and anticorrosive coating, and is extensively used as an anticorrosive primer for a steel structure in chemical atmosphere and marine environments and used as a primer for rust prevention and corrosion prevention of bridges, storage tanks, containers, ships, steel structure facilities and the like and for protection of steel plates in workshops.

Description

technical field [0001] The invention relates to a water-based epoxy zinc-rich primer, in particular to a water-based epoxy graphene low-zinc anti-rust primer, which belongs to the technical field of anti-corrosion coatings. Background technique [0002] According to statistics, the metals that corrode and rust each year in the world account for more than 20% to 40% of the annual output, and more than 100 million tons of metals are scrapped due to corrosion every year, and the economic losses caused are about 1 trillion US dollars; The economic loss caused by metal corrosion accounts for about 1.5% to 3.5% of the gross national product. Since steel accounts for 95% of metal usage, and 70% of which is used in an atmosphere prone to rust, the corrosion protection of steel is of great significance. [0003] Steel structure anticorrosion is one of the most important application fields in the coatings industry, and zinc-rich primer is one of the most widely used varieties of anti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/10C09D7/63C09D7/65C09D7/45C08F222/02C08F212/14C08F230/02
CPCC08F222/02C09D5/106C09D163/00C08F212/14C08F230/02C08L35/00C08K13/02C08K3/04C08K3/08C08K3/32C08K3/34C08K5/101
Inventor 陆明许钧强刘敏匡民明徐业雄王松
Owner 明光科迪新材料有限公司
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