JPH0684417A - Polymeric material for outdoor use - Google Patents

Abstract

PURPOSE:To provide a polymeric material for outdoor use, having higher shock resistance than porcelain and allowing an application as an alternative for porcelain by dispersing three way copolymer particles of ethylene.propylene.diene having the predetermined grain size in epoxy resin on the basis of the predetermined ratio, and further coating the epoxy resin with silicone resin. CONSTITUTION:This polymeric material for outdoor use is formed out of epoxy resin containing 10 to 20vol.% of dispersed three way copolymer particles of ethylene.propylene.diene having a grain size between 1mum and 17mum, and has a silicone resin coating layer. According to this construction, a material having high weather and shock resistance can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor polymer material suitable for use in insulators and structures of outdoor high-voltage equipment such as insulators, insulators, bushings and spacers.

[0002]

2. Description of the Related Art Among high-voltage equipment, porcelain products that have not been electrically or mechanically deteriorated have long been used for insulating materials and structural materials that are directly exposed to the outdoors, such as insulators, insulator tubes, bushings and spacers. There is.

[0003]

However, as typified by an insulator, a porcelain has a large specific gravity and a product becomes heavy, so that the strength of a steel tower is limited, which hinders compactness and beautification. In addition, due to the hard and brittle nature of porcelain, the impact of electric energy during an air flash on the outside of the insulator cracks the insulator's cap and causes parts to drop from the tower, or excessive lightning may occur in an insulator tube that internally presses the sorester element. There is a problem that the air in the gap between the element and the porcelain tube expands and explodes due to energy due to penetration of the element or flashing on the outside of the element that occurs when absorbing a surge.

Therefore, replacement of porcelain products with polymer materials, which are relatively high in impact resistance and light in weight as compared with porcelain, are currently under study. Among these, epoxy resins have been studied, but epoxy resins have the drawbacks that they have insufficient outdoor resistance, tracking resistance, etc., and that cracks occur during flashover.

In view of such circumstances, an object of the present invention is to provide an outdoor polymer material which has higher impact resistance than porcelain and can be used in place of porcelain.

[0006]

The outdoor polymer material according to the present invention, which achieves the above object, comprises 10 to 2 ethylene / propylene / diene terpolymer particles having a particle size of 1 to 17 μm.
It is characterized by comprising an epoxy resin dispersed in 0% by volume and having a silicone resin coating layer.

[0007]

In the polymer material having the above structure, the impact resistance is remarkably improved by dispersing the ethylene / propylene / diene terpolymer (hereinafter referred to as EPDM) particles having a specific particle diameter in the epoxy resin, and Weather resistance is enhanced by providing a silicone resin coating layer.
As a result, the material does not deteriorate or break under the conditions of so-called outdoor exposure, in which a voltage is constantly applied in the natural environment such as sunlight, especially ultraviolet rays, temperature, rain, etc., and it is lightweight and has high impact resistance. It becomes a molecular material.

[0008]

EXAMPLES The present invention will be described below based on examples.

Bisphenol type C as epoxy
Using T-200 (manufactured by Ciba Gaggy) and anhydride-resistant HN-2200 (manufactured by Hitachi Chemical Co., Ltd.) as a curing agent, EPDM (manufactured by Sumitomo Chemical Co., Ltd.) particles were dispersed in the epoxy resin and cured. . Next, one-component RT as silicone resin
V rubber KE44 (manufactured by Shin-Etsu Silicone Co., Ltd.) was brush-coated to form a silicone resin coating layer. EPDM
The impact resistance of each material and the weather resistance in the merry-go-round method (MGR test) were tested by changing the particle size and the filling amount of the particles as shown in the table below, and the results in the table below were obtained. In addition, the same test was carried out for those in which the EPDM particles were not dispersed and the silicone resin coating layer was not formed.

[0010]

[Table 1]

As is clear from the above results, in the outdoor polymer material of the present invention, the particle size of EPDM particles is 1 to 17.
The filling amount is preferably 10 to 20 vol% in μm. If the particle size is smaller than the above range, the impact resistance improving effect is improved, but the working viscosity is increased and dispersion becomes difficult, resulting in a decrease in the filling amount and deterioration of characteristics, which is not preferable. on the other hand,
If the particle size exceeds the above range and becomes larger than 20 μm, the impact resistance is significantly deteriorated, which is not preferable. The filling amount of 10 to 20 vol% is a preferable range for maintaining material characteristics.

Further, in the present invention, since the epoxy resin acts as a structural material, its kind is not particularly limited. On the other hand, the silicone resin may be any one as long as it can improve the weather resistance, and its coating method is not particularly limited.

[0013]

As described above, the outdoor polymer material of the present invention is lighter in weight, has higher impact resistance and higher weather resistance than porcelain, and is therefore used outdoors instead of porcelain. It can be used for insulators, insulators, bushings, spacers, etc.

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Claims (1)

[Claims] 1. An outdoor high comprising an epoxy resin having 10 to 20% by volume of ethylene / propylene / diene terpolymer particles having a particle diameter of 1 to 17 μm dispersed therein and comprising a silicone resin coating layer. Molecular material.