Single-component aqueous silicon steel sheet paint

Abstract

The invention discloses a single-component aqueous silicon steel sheet paint, and belongs to the field of aqueous paints. The single-component aqueous silicon steel sheet paint comprises the followingcomponents in parts by weight: 150-350 parts of bisphenol type-A epoxy resin, 3-30 parts of modified dicyandiamide, 0-10 parts of morpholine-4-methylbenzenesulfonate, 50-200 parts of deionized water,10-60 parts of an epoxy resin diluent, 5-20 parts of inorganic filler, 1-8 parts of a wetting agent, 0.5-2 parts of a defoaming agent, 0.5-2 parts of a leveling agent, 0.5-1 part of a preservative, 1-4 parts of a flash rust preventing agent, 5-25 parts of a silane coupling agent and 0.3-3 parts of a neutralizing agent. The single-component aqueous silicon steel sheet paint has the characteristicsof stable performance, high hardness, good heat resistance, good leveling property, stable long-term storage property, high bonding property, no peculiar smell, low toxicity and environmental friendliness at the normal temperature, and is simple and convenient to produce, store and transport.

Description

technical field [0001] The invention relates to the field of water-based coatings, in particular to a single-component water-based paint for silicon steel sheets, which covers the surface of silicon steel sheets for insulation and protection, and is especially suitable for insulating silicon steel sheets of large generators and motors. Background technique [0002] Silicon steel sheets are used in motor and transformer iron cores. In order to reduce the eddy current loss of the iron cores and enhance the anti-rust and corrosion resistance, it is necessary to coat the silicon steel sheets with insulating varnish. As an insulating paint, it should have good dielectric properties, oil resistance, moisture resistance, strong adhesion, and sufficient mechanical strength and hardness. In addition, the paint film should be as thin as possible under the premise of satisfying the performance, so as to increase the lamination coefficient of the iron core and increase the effective len...

AI Technical Summary

Problems solved by technology

[0003] Most of the traditional epoxy resin coating materials are two-component systems, which need to be used and prepared immediately, which brings inconvenience to the construction site (Zhao Hui, Chen Zhiming, Wang Qiuying, Wu Xia. Modified imidazole latent epoxy resin Preparation of Curing Agent[J]. Coating Industry, 2004, 7:23-25)

Moreover, the existing single-component silicon steel sheet paint has poor stability, and the hardness and heat resistance level of the paint film also need to be improved.

[0004] In addition, the adhesion or bonding performance between the existing silicon steel sheet paint film and the silicon steel sheet is not good enough, the adhesion effect is not good enough, and the leveling performance is poor, resulting in a large paint film thickness and a small lamination coefficient of the iron core

[0005] Moreover, most of the existing silicon steel sheet paints are added with organic solvents, which have peculiar smell and even toxicity

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