Insulating water-based epoxy self-adhesive paint and preparation method thereof
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A water-based epoxy and self-adhesive paint technology, which is applied in the direction of epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems of low degree of productization, poor storage stability, and low bonding strength
Active Publication Date: 2021-04-30
ZHEJIANG RONGTAI TECH ENTERPRISE
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Problems solved by technology
[0005] In order to solve the problems of low degree of productization in the prior art, poor storage stability, low bonding strength after heating, and serious paint bleeding at the edge of the silicon steel sheet during hot pressing, this application provides an insulating water-based epoxy self-adhesive paint and its preparation method
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preparation example 1
[0042] The preparation of the modified amine curing agent is based on the patented modified hydrazide latent curing agent and its preparation method (application number: 200910053807.0) of Jiaxing Rongtai Repas Insulation Material Co., Ltd.
[0043] The specific preparation method of the modified amine curing agent is: in a 500ml three-necked flask equipped with an electric stirrer, a spherical condenser and a thermometer, add 250g of isophthalic acid hydrazide, 0.15g of 2-methylimidazole and 150ml of Ethylene glycol butyl ether, after heating and dissolving at 120°C, add 150g butyl glycidyl ether in batches, then continuously stir and react at 120°C for 8-10 hours, vacuumize to remove the solvent, and obtain a colorless or light yellow viscous Thick matter is latent curing agent.
Embodiment 1
[0046] An insulating water-based epoxy self-adhesive paint, including 100 parts of WXDIC epoxy resin 0197 (epoxy resin--Phoenix brand WXDIC epoxy resin 0197, equivalent weight 1800g / mol, softening point 125 ° C, viscosity: 58cP (test conditions: 40% methyl ethyl ketone solution, 25°C), Nantong Xingchen Synthetic Materials Co., Ltd.), equivalent 1800g / mol, 10 parts of butanol (Jinan Hengcheng New Material Co., Ltd.), 4.5 parts of propylene glycol butyl ether (Jinan Hengcheng New Material Co., Ltd.), 16 parts of spherical silicone resin (Shanghai Haochong Chemical Co., Ltd., (HOCON1811 silicone resin powder) content ≥ 99.99 (%) category methyl silicone resin product number HOCON-1811 particle size 1.2μm), 2.5 parts of γ-glycidyl etheroxypropyl trimethoxysilane (water-based coupling agent, Momentive COATOSIL*2287, American Momentive Advanced Materials Group), 15.5 parts of Baichen reaction type of Shenyang Baichen Chemical Technology Co., Ltd. Water-based epoxy emulsifier (resin)...
Embodiment 2
[0052] The difference between Example 2 and Example 1 is that the addition of spherical silicone resin is 5 parts.
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Abstract
The invention relates to the technical field of epoxy self-adhesive paint, in particular to insulating waterborne epoxy self-adhesive paint and a preparation method thereof. The insulating water-based epoxy self-adhesive paint is prepared from the following raw materials: epoxy resin, a cosolvent, spherical organic silicon resin, a water-based coupling agent, an emulsifier, water, a latent curing agent, a leveling agent, a wetting agent and an antifoaming agent. The self-adhesive paint has the excellent effects of high temperature resistance, smoothness, low specific gravity, water resistance, salt spray resistance and insulation. The preparation method comprises the following steps: adding the spherical organic silicon resin and the coupling agent into water, heating, and carrying out heat preservation reaction to obtain a modifier; dissolving epoxy resin in a cosolvent, heating, adding the modifier and the emulsifier, uniformly stirring, and dropwise adding residual water until the viscosity is reduced in a cliff manner; finally, adding a latent curing agent, a leveling agent, a wetting agent and an antifoaming agent, keeping the temperature, and performing uniform dispersing to obtain a finished product. The preparation method is simple to operate and convenient for batch production.
Description
technical field [0001] The present application relates to the technical field of epoxy self-adhesive paint, in particular to an insulating water-based epoxy self-adhesive paint and a preparation method thereof. Background technique [0002] Self-adhesive paint is to coat the product paint on the silicon steel sheet, first pre-dry the paint film to make it a soft and active coating (stage B), and then laminate the silicon steel sheet by heating and pressing At this time, the active coating in the B stage is transformed into a fully cured paint layer (C stage) under the heating and pressing process. This method avoids the short circuit caused by the traditional welding or riveting process between silicon steel sheets. , Toxic gas and noise generated by the iron core during use. [0003] At present, there are few studies on self-adhesive paints used for bonding silicon steel sheets. In the early days, there were researches and products on solvent-based self-adhesive paints for...
Claims
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Application Information
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