Epoxy anticorrosion primer for smooth metal surface and preparation method thereof

Abstract

The invention relates to an epoxy primer and particularly relates to an epoxy anticorrosion primer for a smooth metal surface and a preparation method thereof. The epoxy anticorrosion primer is prepared from a component A including 6 to 13 parts of epoxy resin A, 8 to 18 parts of epoxy resin B, 0.3 to 1.0 part of a de-foaming agent, 0.4 to 1.0 part of an aminosilane coupling agent, 0.6 to 1.5 parts of a wetting dispersant, 15 to 25 parts of anti-rust paint, 20 to 35 parts of packing, 0.5 to 1.5 parts of a thixotropic agent and 5 to 9 parts of an organic solvent; and a component B including 9 to 13 parts of epoxy modified polyamide C and 7 to 10 parts of epoxy modified polyamide D. Compared with the prior art, the epoxy anticorrosion primer for the smooth metal surface, provided by the invention, adopts the aminosilane coupling agent to modify the epoxy resin, and a modified polyamide curing agent is reasonably compounded and a solvent system is reasonably optimized, thus solving the problem that the adhesive force of an anticorrosion coating on the smooth surface is poor.

Description

technical field [0001] The invention relates to an epoxy primer, in particular to an epoxy anticorrosion primer for smooth metal surfaces and a preparation method thereof. Background technique [0002] In order to ensure a good bonding force between the coating film and the object to be coated, the coating must be subjected to strict pre-treatment on the metal surface to be coated before construction, including simple solvent cleaning, manual and power tool grinding, sandblasting, etc. . Among them, the use of sandblasting can improve the roughness of the metal surface. Tests have shown that the roughness R value of the sandblasted metal surface can reach between 6-8. The rough surface can greatly increase the actual contact area between the coating and the substrate and Achieve anchoring effect and enhance the adhesion of the coating. However, when the surface treatment of the substrate does not meet the expected requirements, it is not easy to obtain good adhesion betwee...

AI Technical Summary

Problems solved by technology

The literature "Progress in the Development and Application of Silicone Adhesion Promoters" reports the influence of several silane coupling agents on the adhesion of coatings. The test shows that directly adding silane coupling agents as additives can improve the adhesion. Smaller, as adding 1wt% n-beta-(aminoethyl)-gamma-aminopropyltrimethoxysilane, the epoxy paint adhesion has only been promoted by 6%. The lifting effect of the effort is only within 15% (pulling method)

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