阅读说明：本技术 一种有机-无机复合无铬硅钢片绝缘涂料 (Organic-inorganic composite chromium-free silicon steel sheet insulating paint ) 是由 陈炜 姬芳芳 万惠林 于 2019-11-07 设计创作，主要内容包括：本发明涉及绝缘涂料制备技术领域,且公开了一种有机-无机复合无铬硅钢片绝缘涂料,包括以下重量份数配比的原料,磷酸异辛酯、四硫代钨酸铵、三异硬脂酰基钛酸异丙酯、甘油、硅丙树脂、丙烯酸树脂、乙烯基三乙氧基硅烷、硅酸钠、硅溶胶、纳米TiO2、共聚物防沉剂、聚丙烯酸酯分散剂。该有机-无机复合无铬硅钢片绝缘涂料,磷酸异辛酯可以作为有机绝缘涂层主要成分,相比于传统的磷酸盐无机涂层,磷酸异辛酯的绝缘和隔热效果更好,四硫代钨酸铵中可以代替有毒的铬酸酐,从而制备出无铬绝缘涂层,对涂层的外观、磁性能的能力和耐蚀性能都有明显的改善,硅丙树脂和丙烯酸树脂作为有机涂料层。(The invention relates to the technical field of insulating paint preparation, and discloses an organic-inorganic composite chromium-free silicon steel sheet insulating paint which comprises the following raw materials in parts by weight, i-octyl phosphate, ammonium tetrathiotungstate, triisostearoyl isopropyl titanate, glycerol, silicone-acrylate resin, acrylic resin, vinyl triethoxysilane, sodium silicate, silica sol, nano TiO2, a copolymer anti-settling agent and a polyacrylate dispersing agent. According to the organic-inorganic composite chromium-free silicon steel sheet insulating coating, isooctyl phosphate can be used as a main component of an organic insulating coating, compared with a traditional phosphate inorganic coating, isooctyl phosphate has better insulating and heat-insulating effects, and ammonium tetrathiotungstate can replace toxic chromic anhydride, so that the chromium-free insulating coating is prepared, the appearance, the magnetic performance and the corrosion resistance of the coating are obviously improved, and silicone acrylic resin and acrylic resin are used as organic coating layers.)

1. An organic-inorganic composite chromium-free silicon steel sheet insulating paint comprises the following raw materials in parts by weight, and is characterized in that: 10-15 parts of isooctyl phosphate, 10-15 parts of ammonium tetrathiotungstate, 5-15 parts of triisostearoyl isopropyl titanate, 5-10 parts of glycerol, 5-10 parts of silicone-acrylic resin, 10-15 parts of acrylic resin, 0.7-1 part of vinyl triethoxysilane, 1-3 parts of sodium silicate, 10-15 parts of silica sol and 10-15 parts of nano TiO₂1-3 parts of copolymer anti-settling agent and 1-3 parts of polyacrylate dispersant.

2. The organic-inorganic composite chromium-free silicon steel sheet insulating paint according to claim 1, characterized in that: the isooctyl phosphate is 2-ethyl hexyl phosphate, and the mixture of monoester and diester.

3. The organic-inorganic composite chromium-free silicon steel sheet insulating paint according to claim 1, characterized in that: in the ammonium tetrathiotungstate (NH)₄）₂WS₄The content of (A) is 95-98%.

4. The organic-inorganic composite chromium-free silicon steel sheet insulating paint according to claim 1, characterized in that: the silicone-acrylate resin and the acrylic resin are used as viscosity auxiliary agents of the organic coating layer.

5. The organic-inorganic composite chromium-free silicon steel sheet insulating paint according to claim 1, characterized in that: the glycerol is used as a moisture absorption auxiliary agent and is mixed with PO in isooctyl phosphate₄ ^3-The reaction forms a stable organophosphate.

6. The organic-inorganic composite chromium-free silicon steel sheet insulating paint according to claim 3, characterized in that: the isopropyl triisostearoyl titanate forms a chemical bridge between the inorganic pigment and the organic resin.

7. The organic-inorganic composite chromium-free silicon steel sheet insulating paint according to claim 1, characterized in that: the silica sol and the nano TiO₂As inorganic particle filler, the SiO2 content in the silica sol is 40-45 wt%, and the nano TiO₂The particle size of (A) is 20-50 nm.

8. The organic-inorganic composite chromium-free silicon steel sheet insulating paint according to claim 1, characterized in that: the copolymer anti-settling agent is a copolymer of polyamide wax and organic bentonite, and the mass ratio of the copolymer anti-settling agent to the organic bentonite is 1: 20.

9. The organic-inorganic composite chromium-free silicon steel sheet insulating paint according to claim 1, wherein the preparation method of the organic-inorganic composite chromium-free silicon steel sheet insulating paint comprises the following steps:

(1) weighing 10-15 parts of isooctyl phosphate and 5-10 parts of glycerol, sequentially adding into a high-speed stirrer, uniformly stirring for 30 min, sequentially adding 1-3 parts of sodium silicate, 10-15 parts of silica sol and 10-15 parts of nano TiO2, and rapidly stirring for 1 h;

(2) weighing 10-15 parts of ammonium tetrathiotungstate and 5-15 parts of triisostearoyl isopropyl titanate, sequentially adding the ammonium tetrathiotungstate and the triisostearoyl isopropyl titanate into a high-speed stirrer, uniformly stirring for 1 hour, after the materials are uniformly mixed, sequentially adding 5-10 parts of silicone-acrylic resin, 10-15 parts of acrylic resin and 0.7-1 part of vinyl triethoxysilane, and uniformly stirring for 1 hour;

(3) weighing 1-3 parts of copolymer anti-settling agent and 1-3 parts of polyacrylate dispersant, sequentially adding into a high-speed stirrer, and quickly stirring for 2 hours to prepare the organic-inorganic composite chromium-free silicon steel sheet insulating coating.

Technical Field

The invention relates to the technical field of insulating paint preparation, in particular to an organic-inorganic composite chromium-free silicon steel sheet insulating paint.

Background

The insulating paint has excellent electrical insulating property with good electrical property, thermal property, mechanical property and chemical property, and can be divided into the following parts according to the application: impregnating insulating varnish, wire enamel, covering insulating varnish, bonding insulating varnish, special insulating varnish and silicon steel sheet varnish used as an insulating layer of a silicon steel sheet.

In the prior silicon steel sheet paint, a chromate insulating coating formula is developed to be mature, and the chromate insulating coating has excellent performances in the aspects of insulativity, adhesion, corrosion resistance and the like, but hexavalent chromium has high toxicity and environmental toxicity and is an environmental pollutant which is difficult to remove, in addition, along with the improvement of the automation degree of the manufacturing industry, the defect that the sliding property of a chromium-containing coating on the surfaces of other steels (such as equipment guide rails and the like) is insufficient is increasingly obvious, in addition, for high-silicon steel with high silicon content, high hardness and low punching performance, the punching performance of an inorganic coating is poorer, and the insulating coefficient of the surface of an organic coating is lower and the heat resistance is poorer.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an organic-inorganic composite chromium-free silicon steel sheet insulating paint, which solves the problem that the chromium silicon steel sheet insulating paint contains toxic chromium, and simultaneously solves the problems that the inorganic coating punching sheet has poor performance, the surface of the organic coating has low insulating coefficient and poor heat resistance.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: an organic-inorganic composite chromium-free silicon steel sheet insulating coating comprises, by weight, 10-15 parts of isooctyl phosphate, 10-15 parts of ammonium tetrathiotungstate, 5-15 parts of triisostearoyl isopropyl titanate, 5-10 parts of glycerol, 5-10 parts of silicone-acrylate resin, 10-15 parts of acrylic resin, 0.7-1 part of vinyl triethoxysilane, 1-3 parts of sodium silicate, 10-15 parts of silica sol, 10-15 parts of nano TiO2, 1-3 parts of a copolymer anti-settling agent, and 1-3 parts of a polyacrylate dispersant.

Preferably, the isooctyl phosphate is 2-ethylhexyl phosphate, a mixture of monoester and diester, which can be used as a main component of an organic insulating coating, and compared with a traditional phosphate inorganic coating, the isooctyl phosphate has better insulating and heat-insulating effects.

Preferably, the ammonium tetrathiotungstate is (NH)₄）₂WS₄The content of the chromium-free insulating coating is 95-98%, and the chromium-free insulating coating can replace toxic chromic anhydride, so that the chromium-free insulating coating is prepared, and the appearance, the magnetic performance capability and the corrosion resistance of the coating are obviously improved.

Preferably, the silicone acrylic resin and the acrylic resin are used as an organic coating layer to enhance the heat resistance and the insulation of the coating.

Preferably, the glycerol is a moisture absorption auxiliary agent and is mixed with PO in isooctyl phosphate₄ ^3-The reaction forms stable organic phosphate, which can inhibit the moisture absorption of the sintered coating.

Preferably, the triisostearoyl isopropyl titanate improves the heat resistance, hardness and sheet punching property of the coating, forms a chemical bridge bond between the inorganic pigment and the organic resin, increases the compatibility between an organic phase and an inorganic phase, and greatly improves the heat resistance of the coating.

Preferably, the silica sol and the nano TiO₂As inorganic particle filler, the SiO2 content in the silica sol is 40-45 wt%, and the nano TiO₂The grain size of (2) is 20-50 nm, the wear resistance and surface roughness of the coating can be adjusted, the surface resistivity is maintained, and the generation of welding bubbles is reduced.

Preferably, the copolymer anti-settling agent is a copolymer of polyamide wax and organic bentonite, and the mass ratio of the copolymer anti-settling agent to the organic bentonite is 1: 20.

Preferably, the preparation method of the cobalt-plated coal ash organic-inorganic composite zinc-rich coating comprises the following steps:

9. the organic-inorganic composite chromium-free silicon steel sheet insulating paint according to claim 1, wherein the preparation method of the organic-inorganic composite chromium-free silicon steel sheet insulating paint comprises the following steps:

(1) weighing 10-15 parts of isooctyl phosphate and 5-10 parts of glycerol, sequentially adding into a high-speed stirrer, uniformly stirring for 30 min, sequentially adding 1-3 parts of sodium silicate, 10-15 parts of silica sol and 10-15 parts of nano TiO2, and rapidly stirring for 1 h;

(2) weighing 10-15 parts of ammonium tetrathiotungstate and 5-15 parts of triisostearoyl isopropyl titanate, sequentially adding the ammonium tetrathiotungstate and the triisostearoyl isopropyl titanate into a high-speed stirrer, uniformly stirring for 1 hour, after the materials are uniformly mixed, sequentially adding 5-10 parts of silicone-acrylic resin, 10-15 parts of acrylic resin and 0.7-1 part of vinyl triethoxysilane, and uniformly stirring for 1 hour;

(3) weighing 1-3 parts of copolymer anti-settling agent and 1-3 parts of polyacrylate dispersant, sequentially adding into a high-speed stirrer, and quickly stirring for 2 h to prepare the organic-inorganic composite chromium-free silicon steel sheet insulating coating.

(III) advantageous technical effects

Compared with the prior art, the invention has the following beneficial technical effects:

1. the organic-inorganic composite chromium-free silicon steel sheet insulating coating uses silicone-acrylic resin and acrylic resin as organic coating layers to enhance the heat resistance and the insulativity of the coating, uses organic triisostearoyl isopropyl titanate to improve the heat resistance, the hardness and the sheet punching property of the coating, forms a chemical bridge bond between inorganic pigment and organic resin by the triisostearoyl isopropyl titanate, increases the compatibility between an organic phase and an inorganic phase, and greatly improves the heat resistance of the coating.

2. The organic-inorganic composite chromium-free silicon steel sheet insulating paint has ammonium tetrathiotungstate, silica sol and sodium silicate as important components of inorganic coating, no toxic matter chromic anhydride, raised coating punching performance, and PO in glycerin and isooctyl phosphate₄ ^3-The reaction forms stable organic phosphate, which can inhibit the moisture absorption of the sintered coating.

Detailed Description

An organic-inorganic composite chromium-free silicon steel sheet insulating paint comprises, by weight, 10-15 parts of isooctyl phosphate, 10-15 parts of ammonium tetrathiotungstate, 5-15 parts of triisostearoyl isopropyl titanate, 5-10 parts of glycerol, 5-10 parts of silicone-acrylate resin, 10-15 parts of acrylic resin, 0.7-1 part of vinyl triethoxysilane, 1-3 parts of sodium silicate, 10-15 parts of silica sol, 10-15 parts of nano TiO2, 1-3 parts of copolymer anti-settling agent and 1-3 parts of polyacrylate dispersant, wherein the isooctyl phosphate is 2-ethyl hexyl phosphate, a mixture of monoester and diester, and can be used as a mixture of 2-ethyl hexyl phosphate and monoester and diesterCompared with the traditional phosphate inorganic coating, the organic insulating coating has better insulating and heat-insulating effects of isooctyl phosphate and contains (NH) in ammonium tetrathiotungstate₄）₂WS₄The content of the silicon-acrylic resin is 95-98 percent, the silicon-acrylic resin and the acrylic resin can replace toxic chromic anhydride, thereby preparing a chromium-free insulating coating, obviously improving the appearance, the magnetic performance and the corrosion resistance of the coating, enhancing the heat resistance and the insulativity of the coating by taking the silicone-acrylic resin and the acrylic resin as organic coating layers, adding glycerin as a moisture absorption auxiliary agent and mixing with PO in isooctyl phosphate₄ ^3-The reaction forms stable organic phosphate, the hygroscopicity of the sintered coating can be inhibited, the triisostearoyl isopropyl titanate improves the heat resistance, the hardness and the sheet punching property of the coating, the triisostearoyl isopropyl titanate forms a chemical bridge bond between inorganic pigment and organic resin, the compatibility between an organic phase and an inorganic phase is increased, and the heat resistance of the coating is greatly improved, wherein the silica sol and the nano TiO₂As inorganic particle filler, the SiO2 content in the silica sol is 40-45 wt%, and the nano TiO₂The particle size of the coating is 20-50 nm, the wear resistance and the surface roughness of the coating can be adjusted, the surface resistivity is maintained, and the generation of welding bubbles is reduced, the copolymer anti-settling agent is a copolymer of polyamide wax and organic bentonite, the mass ratio of the copolymer anti-settling agent to the organic-inorganic composite zinc-rich coating is 1:20, and the preparation method of the organic-inorganic composite zinc-rich coating plated with cobalt and coal ash comprises the following steps:

9. the organic-inorganic composite chromium-free silicon steel sheet insulating paint according to claim 1, wherein the preparation method of the organic-inorganic composite chromium-free silicon steel sheet insulating paint comprises the following steps:

(1) weighing 10-15 parts of isooctyl phosphate and 5-10 parts of glycerol, sequentially adding into a high-speed stirrer, uniformly stirring for 30 min, sequentially adding 1-3 parts of sodium silicate, 10-15 parts of silica sol and 10-15 parts of nano TiO2, and rapidly stirring for 1 h;

(2) weighing 10-15 parts of ammonium tetrathiotungstate and 5-15 parts of triisostearoyl isopropyl titanate, sequentially adding the ammonium tetrathiotungstate and the triisostearoyl isopropyl titanate into a high-speed stirrer, uniformly stirring for 1 hour, after the materials are uniformly mixed, sequentially adding 5-10 parts of silicone-acrylic resin, 10-15 parts of acrylic resin and 0.7-1 part of vinyl triethoxysilane, and uniformly stirring for 1 hour.

(3) Weighing 1-3 parts of copolymer anti-settling agent and 1-3 parts of polyacrylate dispersant, sequentially adding into a high-speed stirrer, and quickly stirring for 2 h to prepare the organic-inorganic composite chromium-free silicon steel sheet insulating coating.