Water-based anticorrosive paint

Abstract

The invention relates to a water-based anticorrosive paint. The paint is prepared from the following raw materials in parts by weight: 40 to 70 parts of water-based composite emulsion, 10 to 30 parts of pigment filler, 5 to 10 parts of multifunctional additive, 0.1 to 1 part of thickening agent, 1 to 10 parts of curing agent and 0 to 10 parts of water. According to the scheme, the multifunctional additive provides multiple purposes such as anti-corrosion performance, dispersing performance and anti-settling performance for the coating, and the unstable risk caused by too many types of additives is reduced; according to the scheme, the water-based paint prepared by taking water as a dispersion medium meets the environment-friendly requirement; an auxiliary dispersing agent in the auxiliary agent provides a stable dispersion system for the modified graphene on one hand, is also a dispersing agent of a coating system on the other hand, and can be firmly adsorbed through electrostatic interaction with pigment and filler ions, so that the anti-settling performance of the water-based coating is improved; and the modified graphene is good in dispersity in the coating, the film forming uniformity is greatly improved, the coating has good corrosion resistance, and the coating is high in adhesive force and not prone to cracking or stripping after being sprayed.

Description

technical field [0001] The invention relates to the field of paint preparation, in particular to a water-based anticorrosion paint. Background technique [0002] Most of the traditional industrial coatings use organic solvents as the dispersion medium, which has great advantages in the preparation process, storage and transportation. However, with the progress and development of society, people pay more and more attention to the environmental performance of materials. Organic solvents will release a large amount of volatile organic compounds during use, which will cause certain harm to human health and the natural environment. Therefore, domestic and foreign research teams and enterprises have conducted a lot of research, and water-based coatings have emerged as the times require, and great progress has been made. As the name implies, water-based paint is a paint with water as a solvent. As a new type of environmentally friendly paint, it is favored by the market, but at th...

AI Technical Summary

Problems solved by technology

As the name implies, water-based paint is a paint with water as a solvent. As a new type of environmentally friendly paint, it is favored by the market, but at the same time, using water as a paint inevitably brings some problems such as poor moldability, long film-forming time, low adhesion, Weak anti-corrosion performance and other problems, among which poor anti-corrosion performance has always been a major technical problem that people need to solve urgently

[0003] Graphene with a two-dimensional layered structure has a certain shielding effect on corrosive substances and is an ideal performance-enhancing filler for anti-corrosion coatings. However, due to the small distance between graphene sheets, it is difficult for polymers to enter Between the graphene sheets, it is easy to agglomerate in the coating and it is difficult to disperse evenly, so it is difficult to exert its anti-corrosion performance when graphene is directly added to the coating

Appropriate chemical modification of graphene can effectively improve its dispersion performance in the coating system. The preparation of graphene / polymer composites by in-situ polymerization method has uniform dispersion and high chemical bonding, but the reaction conditions are also difficult to control. Too long grafted polymer chains will lead to the disadvantages of graphene itself, such as reduced electrical conductivity and anti-corrosion properties.

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