A kind of polyurea coating and preparation method thereof

Abstract

The present invention discloses a polyurea coating material and a preparation method thereof. The polyurea coating material comprises a component A and a component B, wherein the component A comprises, by weight, 60-80% of a polyurea resin, 10-15% of a pigment, 10-20% of a filler, 0.5-1.5% of 3A activation powder, 1-2% of a dispersing agent, 3-7% of butyl acetate, 2-5% of PMA, 0.2-0.5% of an antifoaming agent, and 0.5-1% of a leveling agent, the component B comprises, by weight, 70-90% of isocyanate, 0.02-1% of an accelerating agent, and 30-10% of butyl acetate, a mass ratio of the component A to the component B is 3:1, and the polyurea resin is polyaspartic ester. During preparation, the raw materials excluding the antifoaming agent and the leveling agent are uniformly stirred and grinded, then the antifoaming agent and the leveling agent are added to adjust the color and the viscosity to obtain the component A, the component B is weighed according to the mass ratio and is added to a stirring tank, and uniform dispersing is performed.

Description

technical field [0001] The invention relates to the field of polyurea coatings, in particular to a two-component polyurea coating. Background technique [0002] Polyurea coatings are widely used in various fields due to their excellent anti-corrosion, waterproof and wear-resistant characteristics. However, it also exposed a series of problems in the application process, such as the reaction speed is too fast, the construction requires special high temperature and high pressure impact mixing equipment, pitting, orange peel, etc. are easy to form on the surface of the coating, and the apparent state is poor; The wettability of the material is not good and the adhesion is low; the reaction exotherm is concentrated, the heat shrinkage rate is large, the internal stress is large, and the adhesion is negatively affected; the color retention and UV resistance are poor. Contents of the invention [0003] Aiming at the problems of low adhesion and uncontrollable reaction speed in ...

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Problems solved by technology

However, it also exposed a series of problems in the application process, such as the reaction speed is too fast, the construction requires special high temperature and high pressure impact mixing equipment, pitting, orange peel, etc. are easy to form on the surface of the coating, and the apparent state is poor; The wettability of the material is not good and the adhesion is low; the reaction exotherm is concentrated, the heat shrinkage rate is large, the internal stress is large, and the adhesion is negatively affected; the color retention and UV resistance are poor, etc.

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