Cold-contraction type electric fluorosilicone sleeve and application thereof

Abstract

The invention discloses a cold-contraction type electric fluorosilicone sleeve and application thereof. The sleeve is prepared through enabling a -Si-CH=CH2 group in organic polyfluorosilicone and a -Si-H group in organic hydrogen-containing polyfluorosilicone to be subjected to hydrogen-silicon addition reaction in the presence of a noble metal catalyst, and then, carrying out continuous extrusion and vulcanization. According to the cold-contraction type electric fluorosilicone sleeve and the application thereof, the sleeve can be mounted without heating, is low in permanent deformation and can fully meet requirements as long as the inside diameter of a cable accessory is smaller than the outside diameter of a cable insulation by 2mm, and the vulcanization for the product is safe and non-toxic and is free of generation of waste gases, waste water and waste residues; and after vulcanization, the product has excellent expanding tear resistance, insulating performance, tracking resistance, acid / base resistance and ultraviolet resistance, is applicable to the terminal connection of various cables in cable lines and forms an electric power transmission network together with the cables so as to guarantee the connection of cable terminals.

Description

Technical field

[0001] The invention relates to a cold-shrinkable electric fluorosilicon bushing and an application thereof, belonging to the technical field of polymer materials.

Background technique

[0002] Electric power is an important industry related to the national economy and people's livelihood. Electric energy has become an indispensable and important energy source in people's work and life, and the transmission of electric energy has also been put on a new agenda. It goes without saying that power cable accessories are necessary devices for connecting the cable body, connecting the cable with overhead transmission lines and equipment in each substation, and realizing power transmission. In recent years, with the development of the electric power industry and the popularization of power cables, the amount of cable accessories has increased significantly, new products have emerged, and product quality and applicability have continued to improve. It is required ...

Examples

Embodiment 1

[0037] Mix 60 parts of organopolyfluorosiloxane, 40 parts of hydrophobized fumed silica, and 6 parts of additives in a mixer, heat up to 140-150°C, and heat-preserve fumed silica for 6 hours. , then evacuate for 0.5h to remove the additives, heat up to 170°C for 3h, control the temperature higher than 175°C, and then evacuate for 1h, after stirring and cooling, the roller speed ratio of the mill is 2.0, and the distance between the rollers is 5mm. Water cooling method, when the temperature is controlled at 20°C, add 30 parts of organic hydrogen-containing polyfluorosiloxane and 0.3 parts of 6000PPm noble metal catalyst and mix evenly, then extrude at 450°C, extrusion speed 30rpm, vulcanization traction temperature is 200 ℃, using an extrusion mold, the concentricity deviation is not greater than 0.06mm, the continuous extrusion sleeve molding size is: inner diameter 6mm, wall thickness 0.5mm, tolerance plus or minus 0.08mm, that is, a cold shrinkable power fluorosilicone sleeve...

Embodiment 2

[0040] Mix 55 parts of organopolyfluorosiloxane, 45 parts of hydrophobized fumed silica, and 7 parts of additives in a mixer, heat up to 140-150°C, and heat-preserve fumed silica for 6 hours , then evacuate for 0.5h to remove the additives, heat up to 170°C for 3h, control the temperature higher than 175°C, and then evacuate for 1h, after stirring and cooling, the roller speed ratio of the mill is 2.0, and the distance between the rollers is 5mm. Water cooling method, when the temperature is controlled at 20°C, add 35 parts of organic hydrogen-containing polyfluorosiloxane and 0.3 parts of 6000PPm precious metal catalyst and mix evenly, then extrude at 480°C, extrusion speed 28rpm, vulcanization traction temperature 210 ℃, using an extrusion mold, the concentricity deviation is not greater than 0.06mm, the continuous extrusion sleeve molding size is: inner diameter 12mm, wall thickness 1.5mm, tolerance plus or minus 0.09mm, that is, a cold shrinkable power fluorosilicone sleeve...

Embodiment 3

[0043] Mix 58 parts of organopolyfluorosiloxane, 42 parts of hydrophobized fumed silica, and 6 parts of additives in a mixer, heat up to 140-150°C, and heat-preserve fumed silica for 6 hours , then evacuate for 0.5h to remove the additives, heat up to 170°C for 3h, control the temperature higher than 175°C, and then evacuate for 1h, after stirring and cooling, the roller speed ratio of the mill is 2.0, and the distance between the rollers is 5mm. Water cooling method, when the temperature is controlled at 20°C, add 37 parts of organic hydrogen-containing polyfluorosiloxane and 0.3 parts of 6000PPm noble metal catalyst and mix evenly, then extrude at 500°C, extrusion speed 25rpm, vulcanization traction temperature 230 ℃, using an extrusion mold, the concentricity deviation is not greater than 0.06mm, the continuous extrusion sleeve molding size is: inner diameter 15mm, wall thickness 2.0mm, tolerance plus or minus 0.12mm, that is, a cold shrinkable power fluorosilicone sleeve ....

Technical field

[0001] The invention relates to a cold-shrinkable electric fluorosilicon bushing and an application thereof, belonging to the technical field of polymer materials.

Background technique

[0002] Electric power is an important industry related to the national economy and people's livelihood. Electric energy has become an indispensable and important energy source in people's work and life, and the transmission of electric energy has also been put on a new agenda. It goes without saying that power cable accessories are necessary devices for connecting the cable body, connecting the cable with overhead transmission lines and equipment in each substation, and realizing power transmission. In recent years, with the development of the electric power industry and the popularization of power cables, the amount of cable accessories has increased significantly, new products have emerged, and product quality and applicability have continued to improve. It is required ...

Examples

Embodiment 1

[0037] Mix 60 parts of organopolyfluorosiloxane, 40 parts of hydrophobized fumed silica, and 6 parts of additives in a mixer, heat up to 140-150°C, and heat-preserve fumed silica for 6 hours. , then evacuate for 0.5h to remove the additives, heat up to 170°C for 3h, control the temperature higher than 175°C, and then evacuate for 1h, after stirring and cooling, the roller speed ratio of the mill is 2.0, and the distance between the rollers is 5mm. Water cooling method, when the temperature is controlled at 20°C, add 30 parts of organic hydrogen-containing polyfluorosiloxane and 0.3 parts of 6000PPm noble metal catalyst and mix evenly, then extrude at 450°C, extrusion speed 30rpm, vulcanization traction temperature is 200 ℃, using an extrusion mold, the concentricity deviation is not greater than 0.06mm, the continuous extrusion sleeve molding size is: inner diameter 6mm, wall thickness 0.5mm, tolerance plus or minus 0.08mm, that is, a cold shrinkable power fluorosilicone sleeve...

Embodiment 2

[0040] Mix 55 parts of organopolyfluorosiloxane, 45 parts of hydrophobized fumed silica, and 7 parts of additives in a mixer, heat up to 140-150°C, and heat-preserve fumed silica for 6 hours , then evacuate for 0.5h to remove the additives, heat up to 170°C for 3h, control the temperature higher than 175°C, and then evacuate for 1h, after stirring and cooling, the roller speed ratio of the mill is 2.0, and the distance between the rollers is 5mm. Water cooling method, when the temperature is controlled at 20°C, add 35 parts of organic hydrogen-containing polyfluorosiloxane and 0.3 parts of 6000PPm precious metal catalyst and mix evenly, then extrude at 480°C, extrusion speed 28rpm, vulcanization traction temperature 210 ℃, using an extrusion mold, the concentricity deviation is not greater than 0.06mm, the continuous extrusion sleeve molding size is: inner diameter 12mm, wall thickness 1.5mm, tolerance plus or minus 0.09mm, that is, a cold shrinkable power fluorosilicone sleeve...

Embodiment 3

[0043] Mix 58 parts of organopolyfluorosiloxane, 42 parts of hydrophobized fumed silica, and 6 parts of additives in a mixer, heat up to 140-150°C, and heat-preserve fumed silica for 6 hours , then evacuate for 0.5h to remove the additives, heat up to 170°C for 3h, control the temperature higher than 175°C, and then evacuate for 1h, after stirring and cooling, the roller speed ratio of the mill is 2.0, and the distance between the rollers is 5mm. Water cooling method, when the temperature is controlled at 20°C, add 37 parts of organic hydrogen-containing polyfluorosiloxane and 0.3 parts of 6000PPm noble metal catalyst and mix evenly, then extrude at 500°C, extrusion speed 25rpm, vulcanization traction temperature 230 ℃, using an extrusion mold, the concentricity deviation is not greater than 0.06mm, the continuous extrusion sleeve molding size is: inner diameter 15mm, wall thickness 2.0mm, tolerance plus or minus 0.12mm, that is, a cold shrinkable power fluorosilicone sleeve ....

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