阅读说明：本技术 一种变压器用水性环氧酯防腐底漆的制备方法 (Preparation method of water-based epoxy ester anticorrosive primer for transformer ) 是由 吴伟东 王德江 李岳泽 葛东媛 盖晶 赵环宇 王春昊 于 2021-10-19 设计创作，主要内容包括：一种变压器用水性环氧酯防腐底漆的制备方法。具体涉及电力领域。本发明为解决现有技术的变压器防腐底漆的水分双组分体系由于底漆的成本压力以及变压器自身复杂的形貌特性存在推广困难的问题。将分散剂、颜填料、钛白粉、云母粉和消泡剂依次加入一半的去离子水中,得到块状的混合物,将块状的混合物转入至砂磨设备中,并将研磨之后的得到的浆料研磨至细度小于20um,将剩余一半的去离子水、水性环氧酯树脂分散体、氨基树脂、pH值调节剂、基材润湿剂、流平剂、抗闪锈剂、杀菌剂、消泡剂和助溶剂依次加入浆料中,再加入增稠剂调整体系黏度至70-90KU,然后将其过滤,得到水性环氧酯防腐底漆。本发明用于变压器。(A preparation method of a water-based epoxy ester anticorrosive primer for a transformer. In particular to the field of electric power. The invention aims to solve the problem that a water bi-component system of the transformer anticorrosion primer in the prior art is difficult to popularize due to the cost pressure of the primer and the complex appearance characteristic of the transformer. The preparation method comprises the steps of sequentially adding a dispersing agent, pigment and filler, titanium dioxide, mica powder and a defoaming agent into half of deionized water to obtain a blocky mixture, transferring the blocky mixture into sanding equipment, grinding the ground slurry to the fineness of less than 20 microns, sequentially adding the remaining half of deionized water, a waterborne epoxy ester resin dispersoid, amino resin, a pH value regulator, a base material wetting agent, a leveling agent, an anti-flash rust agent, a bactericide, a defoaming agent and a cosolvent into the slurry, adding a thickening agent to adjust the viscosity of the system to 70-90KU, and filtering to obtain the waterborne epoxy ester anticorrosive primer. The invention is used for the transformer.)

1. A preparation method of a water-based epoxy ester anticorrosive primer for transformers is characterized by comprising the following steps: it comprises the following steps:

weighing 10-20 parts of dispersing agent, 20-30 parts of pigment and filler, 20-30 parts of titanium dioxide, 15-20 parts of mica powder, 2-5 parts of defoaming agent, 40-50 parts of deionized water, 30-50 parts of waterborne epoxy ester resin dispersoid, 150-230 parts of amino resin, 30-50 parts of pH value regulator, 1-5 parts of base material wetting agent, 3-5 parts of flatting agent, 10-15 parts of flash rust inhibitor, 8-12 parts of bactericide, 1-2 parts of defoaming agent, 5-10 parts of cosolvent and 35-45 parts of thickener according to parts by weight;

step two, adding the dispersing agent, the pigment filler, the titanium dioxide, the mica powder and the defoaming agent into half of the deionized water in sequence, and stirring for 15-30 minutes at the rotating speed of 1500-3000r/min to obtain a blocky mixture;

step three, transferring the blocky mixture obtained in the step two into sanding equipment, and grinding the ground slurry until the fineness is less than 20 um;

step four, adding the rest half of deionized water, the waterborne epoxy ester resin dispersoid, the amino resin, the pH value regulator, the base material wetting agent, the flatting agent, the flash rust inhibitor, the bactericide, the defoaming agent and the cosolvent into the slurry obtained in the step three in sequence and stirring for 30-40 minutes at the rotating speed of 1000-2000 r/min;

and step five and step four, stirring the mixture for 30-40 minutes, adding a thickening agent to adjust the viscosity of the system to 70-90KU, and filtering to obtain the water-based epoxy ester anticorrosive primer.

2. The preparation method of the water-based epoxy ester anticorrosive primer for transformers according to claim 1, characterized by comprising the following steps: the dispersant in the second step is one or more of stearamide, higher alcohol, polyolefin, vinyl bis-stearamide and stearic acid monoglyceride.

3. The preparation method of the water-based epoxy ester anticorrosive primer for transformers according to claim 1, characterized by comprising the following steps: the pigment and filler in the second step is one or more of micaceous iron oxide, strontium chromate, red lead and zinc phosphate.

4. The preparation method of the water-based epoxy ester anticorrosive primer for transformers according to claim 1, characterized by comprising the following steps: and the defoaming agent in the second step is one or a mixture of more of monoamide, bisamide, trialkyl melamine, cyanuric chloride melamine, fatty amine and the like.

5. The preparation method of the water-based epoxy ester anticorrosive primer for transformers according to claim 1, characterized by comprising the following steps: the cosolvent in the fourth step is one or a mixture of more of organic carboxylic acid metal salt, acetylacetone metal salt, phenyl vinyl silicone oil, methyl vinyl silicone oil and the like.

6. The preparation method of the water-based epoxy ester anticorrosive primer for transformers according to claim 1, characterized by comprising the following steps: the thickener in the fifth step is one or a mixture of acrylic acid, maleic acid or maleic anhydride, methacrylic acid, N-methylene bisacrylamide, butylene diacrylate and diallyl phthalate.

Technical Field

The invention relates to the field of electric power, in particular to a preparation method of a water-based epoxy ester anticorrosive primer for a transformer.

Background

The primer is the first layer of the paint system and is used for improving the adhesive force of the finish paint, increasing the fullness of the finish paint, providing alkali resistance, providing an anti-corrosion function and the like, and simultaneously ensuring the uniform absorption of the finish paint so that the paint system can exert the best effect. With the rapid development of industry, the content of harmful gases such as sulfur dioxide, chlorine, ammonia and the like in a factory is high, and strong corrosion is brought to a transformer, so that a good matching coating is required to protect the inner and outer walls of the transformer, and particularly, the transformer is resistant to corrosion such as oil and grease. At present, the transformer mainly adopts solvent type epoxy ester resin, solvent type alkyd resin, solvent type epoxy resin and the like as a film forming system, a large amount of benzene, ether and ketone solvents are used in construction, and the VOC emission is high and the pollution is obvious. In terms of the current technology, a water-based bi-component epoxy system and a water-based bi-component polyurethane system can meet the corrosion resistance requirement of the transformer, but because the existing anticorrosive primer of the transformer can only use a spraying mode, the transformer has complex appearance characteristics, large volume, different shapes and sizes, more groove positions, difficult effective spraying and limited cost pressure of the primer, the popularization of the existing anticorrosive primer bi-component primer system of the transformer is difficult. Therefore, it is very important to develop a water-based single-component anticorrosion primer suitable for dip coating construction.

In conclusion, the moisture bi-component system of the transformer anticorrosion primer in the prior art has the problem of difficult popularization due to the cost pressure of the primer and the complex appearance characteristic of the transformer.

Disclosure of Invention

The invention provides a preparation method of a water-based epoxy ester anticorrosive primer for a transformer, aiming at solving the problem that a water-based two-component system of the transformer anticorrosive primer in the prior art is difficult to popularize due to the cost pressure of the primer and the complex morphological characteristics of the transformer.

The technical scheme of the invention is as follows:

a preparation method of a water-based epoxy ester anticorrosive primer for a transformer comprises the following steps:

weighing 10-20 parts of dispersing agent, 20-30 parts of pigment and filler, 20-30 parts of titanium dioxide, 15-20 parts of mica powder, 2-5 parts of defoaming agent, 40-50 parts of deionized water, 30-50 parts of waterborne epoxy ester resin dispersoid, 150-230 parts of amino resin, 30-50 parts of pH value regulator, 1-5 parts of base material wetting agent, 3-5 parts of flatting agent, 10-15 parts of flash rust inhibitor, 8-12 parts of bactericide, 1-2 parts of defoaming agent, 5-10 parts of cosolvent and 35-45 parts of thickener according to parts by weight;

step two, adding the dispersing agent, the pigment filler, the titanium dioxide, the mica powder and the defoaming agent into half of the deionized water in sequence, and stirring for 15-30 minutes at the rotating speed of 1500-3000r/min to obtain a blocky mixture;

step three, transferring the blocky mixture obtained in the step two into sanding equipment, and grinding the ground slurry until the fineness is less than 20 um;

step four, adding the rest half of deionized water, the waterborne epoxy ester resin dispersoid, the amino resin, the pH value regulator, the base material wetting agent, the flatting agent, the flash rust inhibitor, the bactericide, the defoaming agent and the cosolvent into the slurry obtained in the step three in sequence and stirring for 30-40 minutes at the rotating speed of 1000-2000 r/min;

and step five and step four, stirring the mixture for 30-40 minutes, adding a thickening agent to adjust the viscosity of the system to 70-90KU, and filtering to obtain the water-based epoxy ester anticorrosive primer. Compared with the prior art, the invention has the following effects:

the invention relates to a preparation method of a water-based epoxy ester anticorrosive primer for a transformer, which prepares the water-based epoxy ester anticorrosive primer by using a water-based epoxy ester resin dispersoid, a dispersant, mica iron oxide, strontium chromate, red lead and zinc phosphate as pigments and fillers, and the like, wherein the water-based epoxy ester anticorrosive primer has good impact resistance, adhesive force, salt water resistance and salt fog resistance, the impact resistance meets GB/T1732-1993 standard, the adhesive force meets GB/T6742-2007 standard, the salt water resistance meets GB/T9274-1988 standard, the salt fog resistance meets GB/T1771-2007 standard, the preparation cost of the water-based epoxy ester anticorrosive primer is low, the water-based epoxy ester anticorrosive primer can carry out shower coating, spraying and brushing on the transformer, can be self-dried and can be dried, and the coating efficiency is high, and the invention solves the problems that the water-based two-component system of the transformer anticorrosive primer in the prior art has complex appearance characteristics of the transformer due to the cost and pressure of the primer and the self The popularization is difficult.

Detailed Description

The first embodiment is as follows: the preparation method of the water-based epoxy ester anticorrosive primer for the transformer comprises the following steps:

weighing 10-20 parts of dispersing agent, 20-30 parts of pigment and filler, 20-30 parts of titanium dioxide, 15-20 parts of mica powder, 2-5 parts of defoaming agent, 40-50 parts of deionized water, 30-50 parts of waterborne epoxy ester resin dispersoid, 150-230 parts of amino resin, 30-50 parts of pH value regulator, 1-5 parts of base material wetting agent, 3-5 parts of flatting agent, 10-15 parts of flash rust inhibitor, 8-12 parts of bactericide, 1-2 parts of defoaming agent, 5-10 parts of cosolvent and 35-45 parts of thickener according to parts by weight;

step two, adding the dispersing agent, the pigment filler, the titanium dioxide, the mica powder and the defoaming agent into half of the deionized water in sequence, and stirring for 15-30 minutes at the rotating speed of 1500-3000r/min to obtain a blocky mixture;

step three, transferring the blocky mixture obtained in the step two into sanding equipment, and grinding the ground slurry until the fineness is less than 20 um;

step four, adding the rest half of deionized water, the waterborne epoxy ester resin dispersoid, the amino resin, the pH value regulator, the base material wetting agent, the flatting agent, the flash rust inhibitor, the bactericide, the defoaming agent and the cosolvent into the slurry obtained in the step three in sequence and stirring for 30-40 minutes at the rotating speed of 1000-2000 r/min;

and step five and step four, stirring the mixture for 30-40 minutes, adding a thickening agent to adjust the viscosity of the system to 70-90KU, and filtering to obtain the water-based epoxy ester anticorrosive primer.

The second embodiment is as follows: the dispersant in step two of the present embodiment is one or more of stearamide, higher alcohol, polyolefin, vinyl bis stearamide, and glyceryl monostearate. The dispersant thus provided improves the water resistance and salt spray resistance of the coating film. The rest is the same as the first embodiment.

The third concrete implementation mode: the pigment and filler in step two of the embodiment is one or more of micaceous iron oxide, strontium chromate, red lead and zinc phosphate. The pigment and the filler are arranged in such a way that the stability is improved and a compact layer is formed. The others are the same as in the first or second embodiment.

The fourth concrete implementation mode: the defoaming agent in the second step of the present embodiment is one or a mixture of more of monoamide, bisamide, trialkyl melamine, cyanuric chloride melamine, fatty amine, and the like. The defoaming agent is good in compatibility and foam breaking capacity, and shrinkage cavities of the coating are avoided. The others are the same as the first, second or third embodiments.

The fifth concrete implementation mode: the cosolvent in step four of the present embodiment is one or more of metal salts of organic carboxylic acids, metal salts of acetylacetone, phenyl vinyl silicone oil, methyl vinyl silicone oil, and the like. The others are the same as the first, second, third or fourth embodiments.

The sixth specific implementation mode: the thickener in step five of the present embodiment is one or more of acrylic acid, maleic acid or maleic anhydride, methacrylic acid, N-methylenebisacrylamide, butylene diacrylate, and diallyl phthalate. The thickening agent is arranged in such a way that the water resistance and the salt fog resistance of the coating are good. The other embodiments are the same as the first, second, third, fourth or fifth embodiments.

Implementing one step:

step one, sequentially adding 10 parts by weight of dispersing agent, 20 parts by weight of pigment and filler, 20 parts by weight of titanium dioxide, 15 parts by weight of mica powder and 2 parts by weight of defoaming agent into 20 parts by weight of deionized water, and stirring at the rotating speed of 1500r/min for 15 minutes to obtain a blocky mixture;

step two, transferring the blocky mixture obtained in the step one into sanding equipment, and grinding the ground slurry until the fineness is less than 20 um;

step three, sequentially adding the rest 20 parts by weight of deionized water, 30 parts by weight of waterborne epoxy ester resin dispersoid, 150 parts by weight of amino resin, 30 parts by weight of pH value regulator, 1 part by weight of base material wetting agent, 3 parts by weight of flatting agent, 10 parts by weight of flash rust inhibitor, 8 parts by weight of bactericide, 1 part by weight of defoaming agent and 5 parts by weight of cosolvent into the slurry in the step two, and stirring for 30 minutes at the rotating speed of 1000 r/min;

and step four and step three, stirring the mixture for 30 minutes, adding 35 parts by weight of thickening agent to adjust the viscosity of the system to 70-90KU, and filtering to obtain the water-based epoxy ester anticorrosive primer.

The water-based epoxy ester anticorrosive primer prepared by the embodiment has good impact resistance, adhesive force, salt water resistance and salt fog resistance, the impact resistance meets the GB/T1732-1993 standard, the adhesive force meets the GB/T6742-2007 standard, the salt water resistance meets the GB/T9274-1988 standard, the salt fog resistance meets the GB/T1771-2007 standard, the preparation cost of the water-based epoxy ester anticorrosive primer is low, the water-based epoxy ester anticorrosive primer can be used for spraying, spraying and brushing a transformer, and can be dried in air or in oven, and the coating efficiency is high.

The second implementation:

step one, sequentially adding 20 parts by weight of dispersing agent, 30 parts by weight of pigment and filler, 30 parts by weight of titanium dioxide, 20 parts by weight of mica powder and 5 parts by weight of defoaming agent into 25 parts by weight of deionized water, and stirring at the rotating speed of 1500r/min for 15 minutes to obtain a blocky mixture;

step two, transferring the blocky mixture obtained in the step one into sanding equipment, and grinding the ground slurry until the fineness is less than 20 um;

step three, sequentially adding the rest 25 parts by weight of deionized water, 50 parts by weight of waterborne epoxy ester resin dispersoid, 230 parts by weight of amino resin, 50 parts by weight of pH value regulator, 5 parts by weight of base material wetting agent, 5 parts by weight of flatting agent, 15 parts by weight of flash rust inhibitor, 12 parts by weight of bactericide, 2 parts by weight of defoaming agent and 10 parts by weight of cosolvent into the slurry in the step two, and stirring for 30 minutes at the rotating speed of 1000 r/min;

and step four and step three, stirring the mixture for 30 minutes, adding 45 parts by weight of thickening agent to adjust the viscosity of the system to 70-90KU, and filtering to obtain the water-based epoxy ester anticorrosive primer.

The water-based epoxy ester anticorrosive primer prepared by the embodiment has good impact resistance, adhesive force, salt water resistance and salt fog resistance, the impact resistance meets the GB/T1732-1993 standard, the adhesive force meets the GB/T6742-2007 standard, the salt water resistance meets the GB/T9274-1988 standard, the salt fog resistance meets the GB/T1771-2007 standard, the preparation cost of the water-based epoxy ester anticorrosive primer is low, the water-based epoxy ester anticorrosive primer can be used for spraying, spraying and brushing a transformer, and can be dried in air or in oven, and the coating efficiency is high.

The present invention has been described in terms of the preferred embodiments, but it is not limited thereto, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention will still fall within the technical scope of the present invention.