Epoxy powder for packaging medium-low-voltage bus bar

Abstract

The invention discloses epoxy powder for packaging a medium-low-voltage bus bar and belongs to the technical field of epoxy powder coating. The epoxy powder comprises common epoxy resin, phosphorus-containing and silicon-containing polyurethane-type epoxy resin, a curing agent, silica micro-powder, an outer flame retardant, a toughening agent, a curing accelerator, a pigment and other substances. According to the epoxy powder, the phosphorus-containing and silicon-containing polyurethane-type epoxy resin is synthesized by isocyanate, a reactive phosphorus-containing compound and organic silicone resin and applied on epoxy powder so as to solve the problems of environmental friendliness and flame retardancy. The epoxy powder prepared by the invention has the characteristics of fast curing and excellent thermal cycle impact resistance, voltage resistance and insulation property and has broad application prospects in the field of medium-low-voltage bus bar packaging.

Description

technical field

[0001] The invention relates to an encapsulation material, in particular to an epoxy powder for encapsulation of medium and low voltage busbars. Background technique

[0002] Medium and low voltage line bars are widely used in people's lives, but most of the bus bars are basically exposed outside, and there are many potential safety hazards. In foreign countries, due to the excellent insulation performance of epoxy powder, it has attracted people's attention, and the encapsulation of wire rows has been gradually completed. The encapsulated wire row has many advantages, such as the small inductance between the wire rows, which can reduce the space between the wire rows and save space, and can also reduce the probability of electric shock. The technology related to epoxy powder used in the domestic cable packaging started relatively late, and there are still many technical problems that have hindered its development. Among them, the fatal flaw is that it canno...

Examples

preparation example Construction

[0037] The synthesis method of the described phosphorus-containing silicon-containing polyurethane type epoxy resin comprises the following steps: firstly utilize the reaction type phosphorus compound and organic silicon resin to react with isocyanate to obtain the phosphorus-containing silicon-containing polyurethane prepolymer whose terminal group is isocyanate , and then use the reaction between isocyanate and epoxy resin to introduce the prepolymer into the molecular chain of epoxy resin to obtain a polyurethane epoxy resin containing phosphorus and silicon at the same time.

[0038] Specifically include the following steps:

[0039] (1) Under the protection of nitrogen, add isocyanate and catalyst into the reaction kettle with heating device, stirrer and thermometer, raise the temperature to 50~150°C, stir to mix isocyanate and catalyst evenly;

[0040] (2) Slowly add the reactive phosphorus-containing compound into the reaction kettle in (1) under stirring, and keep it w...

Embodiment 1

[0110] (1) First crush the raw materials that need to be crushed with a pulverizer;

[0111] (2) After the raw materials are baked and dried separately, set aside;

[0112] (3) Weigh the filler and coupling agent according to the weight in Table 1, microsilica powder DRG800 25kg, coupling agent SG-TPT 0.5kg, put them into a stainless steel mixer and mix vigorously for 10 minutes, and perform surface modification on the filler;

[0113] (4) 40kg of phosphorus-containing silicon-containing polyurethane epoxy resin A, 20kg of curing agent KD402, 2.5kg of toughening agent MBS, 0.5 kg of flame retardant aluminum hydroxide, and a compound of curing accelerator triphenylphosphine and imidazole 0.5kg, leveling agent GLP503 0.5kg, anti-scratch agent carnauba wax 0.5kg, pigment phthalocyanine blue 0.5kg, weighed according to the amount, put into a stainless steel mixer, and mix vigorously for 10 minutes until uniform;

[0114] (5) Melt, knead and extrude the mixed raw materials with a ...

Embodiment 2

[0118] The epoxy powder was prepared according to the steps described in Example 1, the components and their addition amounts are shown in Table 1, and the test performance of the product is shown in Table 2.

technical field

[0001] The invention relates to an encapsulation material, in particular to an epoxy powder for encapsulation of medium and low voltage busbars. Background technique

[0002] Medium and low voltage line bars are widely used in people's lives, but most of the bus bars are basically exposed outside, and there are many potential safety hazards. In foreign countries, due to the excellent insulation performance of epoxy powder, it has attracted people's attention, and the encapsulation of wire rows has been gradually completed. The encapsulated wire row has many advantages, such as the small inductance between the wire rows, which can reduce the space between the wire rows and save space, and can also reduce the probability of electric shock. The technology related to epoxy powder used in the domestic cable packaging started relatively late, and there are still many technical problems that have hindered its development. Among them, the fatal flaw is that it canno...

Examples

preparation example Construction

[0037] The synthesis method of the described phosphorus-containing silicon-containing polyurethane type epoxy resin comprises the following steps: firstly utilize the reaction type phosphorus compound and organic silicon resin to react with isocyanate to obtain the phosphorus-containing silicon-containing polyurethane prepolymer whose terminal group is isocyanate , and then use the reaction between isocyanate and epoxy resin to introduce the prepolymer into the molecular chain of epoxy resin to obtain a polyurethane epoxy resin containing phosphorus and silicon at the same time.

[0038] Specifically include the following steps:

[0039] (1) Under the protection of nitrogen, add isocyanate and catalyst into the reaction kettle with heating device, stirrer and thermometer, raise the temperature to 50~150°C, stir to mix isocyanate and catalyst evenly;

[0040] (2) Slowly add the reactive phosphorus-containing compound into the reaction kettle in (1) under stirring, and keep it w...

Embodiment 1

[0110] (1) First crush the raw materials that need to be crushed with a pulverizer;

[0111] (2) After the raw materials are baked and dried separately, set aside;

[0112] (3) Weigh the filler and coupling agent according to the weight in Table 1, microsilica powder DRG800 25kg, coupling agent SG-TPT 0.5kg, put them into a stainless steel mixer and mix vigorously for 10 minutes, and perform surface modification on the filler;

[0113] (4) 40kg of phosphorus-containing silicon-containing polyurethane epoxy resin A, 20kg of curing agent KD402, 2.5kg of toughening agent MBS, 0.5 kg of flame retardant aluminum hydroxide, and a compound of curing accelerator triphenylphosphine and imidazole 0.5kg, leveling agent GLP503 0.5kg, anti-scratch agent carnauba wax 0.5kg, pigment phthalocyanine blue 0.5kg, weighed according to the amount, put into a stainless steel mixer, and mix vigorously for 10 minutes until uniform;

[0114] (5) Melt, knead and extrude the mixed raw materials with a ...

Embodiment 2

[0118] The epoxy powder was prepared according to the steps described in Example 1, the components and their addition amounts are shown in Table 1, and the test performance of the product is shown in Table 2.

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