阅读说明：本技术 一种高压绝缘粉末涂料 (High-voltage insulation powder coating ) 是由 夏连心 朱满子 方志旺 吴杏子 付军 于 2020-12-04 设计创作，主要内容包括：一种高压绝缘粉末涂料,其涂料各组成原料按质量份计为：环氧树脂60-80份、石英粉20-30份、钛白粉3-6份、天然樟脑1-5份、偶联剂0.2-1.2份、纳米填料12-18份、溶剂30-45份、固化剂0.4-0.8份、助剂3.5-10份；助剂为流平剂1-3份,防沉剂2-4份,分散剂0.2-2份,防腐剂0.1-0.5份和消泡剂0.2-0.5份。本发明质量稳定,具有良好的绝缘性能、耐腐蚀性、耐高温而且导热性好,制备方法简单,条件温和,生产成本低,具有较好的市场前景。(A high-voltage insulation powder coating comprises the following raw materials in parts by mass: 60-80 parts of epoxy resin, 20-30 parts of quartz powder, 3-6 parts of titanium dioxide, 1-5 parts of natural camphor, 0.2-1.2 parts of coupling agent, 12-18 parts of nano filler, 30-45 parts of solvent, 0.4-0.8 part of curing agent and 3.5-10 parts of auxiliary agent; the auxiliary agent is 1-3 parts of flatting agent, 2-4 parts of anti-settling agent, 0.2-2 parts of dispersing agent, 0.1-0.5 part of preservative and 0.2-0.5 part of defoaming agent. The invention has stable quality, good insulating property, corrosion resistance, high temperature resistance, good heat conductivity, simple preparation method, mild conditions, low production cost and better market prospect.)

1. The high-voltage insulation powder coating is characterized by comprising the following raw materials in parts by mass: 60-80 parts of epoxy resin, 20-30 parts of quartz powder, 3-6 parts of titanium dioxide, 1-5 parts of natural camphor, 0.2-1.2 parts of coupling agent, 12-18 parts of nano filler, 30-45 parts of solvent, 0.4-0.8 part of curing agent and 3.5-10 parts of auxiliary agent.

2. The high voltage insulating powder coating according to claim 1, wherein the coupling agent is an aluminate coupling agent.

3. A high voltage insulating powder coating according to claim 2, characterized in that the nano-filler is nano-silicon nitride powder and nano-magnesium hydroxide powder.

4. A high voltage insulating powder coating according to claim 3, wherein the weight ratio of nano silicon nitride powder to nano magnesium hydroxide powder in the nano filler is 1: 1-2.

5. A high voltage insulating powder coating according to claim 4, characterized in that the solvents are acetone and xylene in a volume ratio of 1-1.5: 1, and mixing the components in proportion.

6. A high voltage insulating powder coating according to claim 5, wherein the curing agent is a polyamide curing agent.

7. The high voltage insulating powder coating as claimed in claim 6, wherein the assistant is leveling agent 1-3 parts, anti-settling agent 2-4 parts, dispersant 0.2-2 parts, preservative 0.1-0.5 part and defoaming agent 0.2-0.5 part.

8. The high voltage insulating powder coating according to claim 7, wherein the leveling agent is one or a mixture of more than one of acrylic, silicone and/or fluorocarbon leveling agents.

9. A high voltage insulating powder coating according to claim 8, characterized in that the defoamer is benzoin.

Technical Field

The invention relates to the technical field of coatings, in particular to a high-voltage insulating powder coating.

Background

The powder coating is a novel solvent-free 100% solids powder coating. Is prepared from filming resin, assistant, pigment and filler through mixing, pulverizing and sieving. The coating construction needs electrostatic spraying and baking to form a film. The powder coating has the characteristics of no solvent, no pollution, recoverability, environmental protection, energy and resource saving, labor intensity reduction, high coating mechanical strength and the like, and is widely applied to the surface coating of various boxes, workpieces and security doors made of metal plates.

Powder coatings are divided into two broad categories, thermoplastic powder coatings and thermosetting powder coatings. The thermoplastic powder coating comprises thermoplastic resin, pigment, filler, plasticizer, stabilizer and other components, and comprises polyethylene, polypropylene, polyester, polyvinyl chloride, chlorinated polyether, polyamide, cellulose and the like. The thermosetting powder paint consists of thermosetting resin, curing agent, pigment, stuffing, assistant, etc. and includes epoxy resin, polyester resin, acrylic resin, etc.

The thermosetting powder coating of the epoxy resin-polyester dual-phase system is widely applied due to the advantages of strong adhesion to metal, high impact strength, bending resistance and the like. For example, CN 104119771a discloses a thermosetting epoxy resin powder coating, which is composed of the following components in parts by weight: 23-28% of epoxy resin, 23-28% of polyester resin, 15-20% of titanium dioxide, 14-16% of barium sulfate, 14-17% of calcium carbonate, 0.3-0.7% of auxiliary agent and 0.3-0.7% of inorganic pigment. The powder coating has impact resistance up to 50 kg-cm, and has high adhesion and bending resistance. But the hardness is only 2H, and the insulation performance is poor through research, and the breakdown voltage is below 10 kv/mm. The epoxy-polyester powder coating is difficult to meet the requirements on occasions with high requirements on coating hardness, mechanical properties and insulating properties (breakdown voltage is 30kv/mm) such as motors, distribution boxes and the like.

Therefore, in order to apply high voltage to motors, distribution boxes and the like, a powder coating with both high hardness and high insulation performance needs to be developed.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects in the prior art and provide a high-voltage insulation powder coating with corrosion resistance, high temperature resistance and good heat conductivity.

The technical scheme adopted by the invention for solving the technical problems is as follows: a high-voltage insulation powder coating comprises the following raw materials in parts by mass: 60-80 parts of epoxy resin, 20-30 parts of quartz powder, 3-6 parts of titanium dioxide, 1-5 parts of natural camphor, 0.2-1.2 parts of coupling agent, 12-18 parts of nano filler, 30-45 parts of solvent, 0.4-0.8 part of curing agent and 3.5-10 parts of auxiliary agent.

Further, the coupling agent is an aluminate coupling agent.

Further, the nano filler is nano silicon nitride powder and nano magnesium hydroxide powder.

Further, the weight ratio of the nano silicon nitride powder to the nano magnesium hydroxide powder in the nano filler is 1: 1-2.

Further, the solvent is acetone and xylene according to a volume ratio of 1-1.5: 1, and mixing the components in proportion.

Further, the curing agent is a polyamide curing agent.

Further, the auxiliary agent comprises 1-3 parts of flatting agent, 2-4 parts of anti-settling agent, 0.2-2 parts of dispersing agent, 0.1-0.5 part of preservative and 0.2-0.5 part of defoaming agent.

Further, the flatting agent is one or a mixture of more than one of acrylic, organic silicon and/or fluorocarbon flatting agents.

Further, the defoaming agent is benzoin.

The invention has the advantages of stable quality, good insulating property, corrosion resistance, high temperature resistance, good heat conductivity, simple preparation method, mild condition, low production cost and better market prospect.

Detailed Description

The following examples are given to further illustrate the embodiments of the present invention:

example 1: a high-voltage insulation powder coating comprises the following raw materials in parts by mass: 60 parts of epoxy resin, 20 parts of quartz powder, 6 parts of titanium dioxide, 5 parts of natural camphor, 1.2 parts of coupling agent, 18 parts of nano filler, 30 parts of solvent, 0.4 part of curing agent and 10 parts of auxiliary agent; the coupling agent is an aluminate coupling agent; the nano filler is nano silicon nitride powder and nano magnesium hydroxide powder; the weight ratio of the nano silicon nitride powder to the nano magnesium hydroxide powder in the nano filler is 1: 1; the solvent is acetone and xylene according to the volume ratio of 1: 1 by mixing; the curing agent is polyamide curing agent; the auxiliary agent comprises 3 parts of flatting agent, 2 parts of anti-settling agent, 0.2 part of dispersing agent, 0.1 part of preservative and 0.2 part of defoaming agent; the flatting agent is acrylic acid; the defoaming agent is benzoin.

Example 2: a high-voltage insulation powder coating comprises the following raw materials in parts by mass: 80 parts of epoxy resin, 30 parts of quartz powder, 3 parts of titanium dioxide, 5 parts of natural camphor, 1.2 parts of coupling agent, 18 parts of nano filler, 45 parts of solvent, 0.4 part of curing agent and 10 parts of auxiliary agent; the coupling agent is an aluminate coupling agent; the nano filler is nano silicon nitride powder and nano magnesium hydroxide powder; the weight ratio of the nano silicon nitride powder to the nano magnesium hydroxide powder in the nano filler is 1: 2; the solvent is acetone and xylene according to the volume ratio of 1.5: 1 by mixing; the curing agent is polyamide curing agent; the auxiliary agent comprises 1 part of flatting agent, 2 parts of anti-settling agent, 2 parts of dispersing agent, 0.5 part of preservative and 0.5 part of defoaming agent; the flatting agent is organic silicon; the defoaming agent is benzoin.

Example 3: a high-voltage insulation powder coating comprises the following raw materials in parts by mass: 75 parts of epoxy resin, 25 parts of quartz powder, 4 parts of titanium dioxide, 4 parts of natural camphor, 0.8 part of coupling agent, 15 parts of nano filler, 40 parts of solvent, 0.6 part of curing agent and 6 parts of auxiliary agent; the coupling agent is an aluminate coupling agent; the nano filler is nano silicon nitride powder and nano magnesium hydroxide powder; the weight ratio of the nano silicon nitride powder to the nano magnesium hydroxide powder in the nano filler is 1: 1.5; the solvent is acetone and xylene according to the volume ratio of 1.2: 1 by mixing; the curing agent is polyamide curing agent; the auxiliary agent comprises 2 parts of flatting agent, 3 parts of anti-settling agent, 0.5 part of dispersing agent, 0.3 part of preservative and 0.2 part of defoaming agent; the flatting agent is organic silicon; the defoaming agent is benzoin.

Those not described in detail in the specification are well within the skill of the art.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as being within the protection scope of the present invention.