阅读说明：本技术 一种洗衣机电机铜线用绝缘材料及其制备方法 (Insulating material for copper wire of washing machine motor and preparation method of insulating material ) 是由 赵茜菁 金闪 石耀琦 王宇 于 2020-05-07 设计创作，主要内容包括：本发明公开了一种洗衣机电机铜线用绝缘材料,其制备原料按重量份数包括以下组分：PBT树脂30～50份、硅氧烷预聚物15～30份、玻璃纤维5～15份、催化剂1～3份、封端固化剂3～5份、硅烷偶联剂2～5份、纳米粒子3～10份、活性稀释剂20～35份、引发剂0.5～2份。本发明还公开了一种洗衣机电机铜线用绝缘材料的制备方法。该绝缘材料具有较好的绝缘性、机械性能、附着力、耐化学腐蚀性、耐热性和抗电晕性,性能稳定,作为绝缘层使用时的使用寿命得到极大提高。(The invention discloses an insulating material for a copper wire of a washing machine motor, which comprises the following raw materials in parts by weight: 30-50 parts of PBT resin, 15-30 parts of siloxane prepolymer, 5-15 parts of glass fiber, 1-3 parts of catalyst, 3-5 parts of end-capping curing agent, 2-5 parts of silane coupling agent, 3-10 parts of nano particles, 20-35 parts of reactive diluent and 0.5-2 parts of initiator. The invention also discloses a preparation method of the insulating material for the copper wire of the washing machine motor. The insulating material has good insulativity, mechanical property, adhesive force, chemical corrosion resistance, heat resistance and corona resistance, has stable performance, and greatly prolongs the service life when being used as an insulating layer.)

1. The insulating material for the copper wire of the washing machine motor is characterized by comprising the following components in parts by weight: 30-50 parts of PBT resin, 15-30 parts of siloxane prepolymer, 5-15 parts of glass fiber, 1-3 parts of catalyst, 3-5 parts of end-capping curing agent, 2-5 parts of silane coupling agent, 3-10 parts of nano particles, 20-35 parts of reactive diluent and 0.5-2 parts of initiator.

2. The insulating material for the copper wire of the washing machine motor as claimed in claim 1, wherein the siloxane prepolymer is a siloxane prepolymer containing a terminal vinyl group.

3. The insulation material for the copper wire of the washing machine motor according to claim 1, wherein the catalyst comprises any one or a mixture of two or more of but not limited to butyl titanate, zinc acetate and stannous octoate.

4. The insulating material for the copper wire of the washing machine motor as claimed in claim 1, wherein the blocked curing agent is blocked polyisocyanate.

5. The insulating material for the copper wire of the washing machine motor as claimed in claim 1, wherein the nano particles are nano TiO₂Nano SiO₂Nanometer α -Al₂O₃One kind of (1).

6. The insulation material for copper wires of washing machine motors as claimed in claim 1, wherein the reactive diluent comprises one or a combination of two or more of styrene, vinyl toluene and diallyl phthalate.

7. The insulation material for copper wire of washing machine motor according to claim 1, wherein the initiator includes but is not limited to one or a combination of two or more of dicumyl peroxide, t-butyl peroxybenzoate, di (t-butylperoxy) -3,3,5 trimethylethane, and dicumyl peroxide.

8. The method for preparing the insulating material for the copper wire of the washing machine motor according to any one of claims 1 to 7, comprising the steps of:

(1) weighing PBT resin, siloxane prepolymer and catalyst according to the weight ratio, mixing the weighed PBT resin, siloxane prepolymer and catalyst, heating to 100-200 ℃, and carrying out copolymerization reaction to obtain an organic silicon/PBT resin copolymer;

(2) and (2) respectively weighing the glass fiber, the end-capping curing agent, the silane coupling agent, the nano particles, the reactive diluent and the initiator according to the weight ratio, adding the glass fiber, the end-capping curing agent, the silane coupling agent, the nano particles, the reactive diluent and the initiator into the organic silicon/PBT resin copolymer prepared in the step (1), and uniformly stirring to obtain the insulating material.

Technical Field

The invention belongs to the technical field of insulating materials, and particularly relates to an insulating material for a copper wire of a washing machine motor and a preparation method of the insulating material.

Background

The motor is used as the heart of the washing machine, and the performance of the motor determines the running state, the washing and spin-drying quality, the noise, the vibration magnitude, the energy consumption and the like of the washing machine. The washing machine motor is generally made of two materials, namely an aluminum wire motor and a copper wire motor; in comparison, the copper wire motor is more durable, long in service life, more energy-saving and low in noise. A stator in the copper wire motor adopts a copper wire winding, and a copper wire adopts an enameled wire; the enameled wire is prepared by coating a high-molecular insulating material (insulating paint) on a copper wire according to a specific production process. The insulating material on the enamel wire is required to have good adhesion, insulation, mechanical strength, heat resistance, corona resistance, and the like. With the continuous development of the industry, the requirement on insulating materials is higher and higher, and the insulating materials adopted for copper wires at present cannot meet the requirement. Therefore, the development of a novel insulating material for a motor copper wire is necessary and has a profound significance.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide an insulating material for a copper wire of a washing machine motor and a preparation method thereof.

In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme: the insulating material for the copper wire of the washing machine motor comprises the following preparation raw materials in parts by weight: 30-50 parts of PBT resin, 15-30 parts of siloxane prepolymer, 5-15 parts of glass fiber, 1-3 parts of catalyst, 3-5 parts of end-capping curing agent, 2-5 parts of silane coupling agent, 3-10 parts of nano particles, 20-35 parts of reactive diluent and 0.5-2 parts of initiator.

Preferably, the silicone prepolymer is a vinyl-terminated silicone prepolymer.

Preferably, the catalyst includes but is not limited to any one or a mixture of two or more of butyl titanate, zinc acetate and stannous octoate.

Preferably, the blocked curing agent is a blocked polyisocyanate.

Preferably, the nano particles are nano TiO₂Nano SiO₂Nanometer α -Al₂O₃One kind of (1).

Preferably, the reactive diluent includes, but is not limited to, one or a combination of two or more of styrene, vinyl toluene, or diallyl phthalate.

Preferably, the initiator includes, but is not limited to, one or a combination of two or more of dicumyl peroxide, tert-butyl peroxybenzoate, di (tert-butylperoxy) -3,3, 5-trimethylethane, and dicumyl peroxide.

The invention also provides a preparation method of the insulating material for the copper wire of the washing machine motor, which comprises the following steps:

(1) weighing PBT resin, siloxane prepolymer and catalyst according to the weight ratio, mixing the weighed PBT resin, siloxane prepolymer and catalyst, heating to 100-200 ℃, and carrying out copolymerization reaction to obtain an organic silicon/PBT resin copolymer;

(2) and (2) respectively weighing the glass fiber, the end-capping curing agent, the silane coupling agent, the nano particles, the reactive diluent and the initiator according to the weight ratio, adding the glass fiber, the end-capping curing agent, the silane coupling agent, the nano particles, the reactive diluent and the initiator into the organic silicon/PBT resin copolymer prepared in the step (1), and uniformly stirring to obtain the insulating material.

The invention has the beneficial effects that:

(1) the invention adopts siloxane prepolymer containing terminal vinyl and polybutylene terephthalate (PBT) to be blended in a molten state, and the silicone/PBT resin copolymer is formed by copolymerization reaction under the action of a catalyst after being heated; the invention utilizes the organic silicon to modify the PBT resin, so that the advantages of two polymer materials are complemented, and the organic silicon/PBT resin copolymer is used as the base material to prepare the insulating material, so that the insulating material has better chemical corrosion resistance, water resistance, physical and mechanical properties, wear resistance and adhesiveness, the required curing time is short, and the service life of the insulating material is greatly prolonged when the insulating material is used as an insulating layer.

(2) The glass fiber is added into the preparation raw materials, and the mechanical property and the insulating property of the obtained insulating material can be enhanced by the glass fiber; moreover, the silane coupling agent can improve the compatibility of the glass fiber and the base material, so that the glass fiber is distributed more uniformly.

(3) The invention adopts the end-capping curing agent, so that bubbles are not easy to generate in the curing process of forming the insulating layer on the copper wire by the insulating material.

(4) According to the invention, the nano particles are added into the preparation raw materials, so that when the external electric field of the insulating layer is changed, polarization can be quickly reestablished, space charge accumulation is reduced, dielectric loss is reduced, the breakdown resistance and the service life of the insulating layer are improved, and further the corona resistance of the motor enameled copper wire is improved.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.