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Light ageing resistant blend for composite insulator and preparation method thereof

A technology for composite insulators and light aging resistance, which is applied in the field of preparation of compounded rubber for composite insulators, and can solve the problems of decreased hydrophobicity, high strength, flashover accidents, etc.

Active Publication Date: 2011-07-20
广州麦科凌电力装备有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The plateau area has high altitude, large temperature difference between day and night, and harsh environment, especially the high total and high intensity of ultraviolet light. The light resistance of conventional composite insulators is limited. Under the action of radiation effect, oxidation reaction occurs on the surface, and the hydrophobicity decreases, causing the insulation performance to decrease and causing flashover accidents

Method used

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  • Light ageing resistant blend for composite insulator and preparation method thereof

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Embodiment 1

[0032] refer to figure 1 And Table 1, Table 1 lists the raw material proportions (parts by weight) of this embodiment, wherein the silicone rubber raw rubber is methyl vinyl silicone rubber, and its vinyl content is 0.04-0.12%. The method for preparing the mixed rubber for light-aging resistant composite insulators according to the ratio of raw materials in Table 1 comprises the following steps:

[0033] The pretreatment of step D, ultraviolet absorber UV-531, its method is: drop into raw silicone rubber, ultraviolet absorber UV-531 and methyl silicone oil in the kneader, silicone rubber raw rubber and ultraviolet absorber UV-531 The ratio is 100:40, a small amount of methyl silicone oil, after kneading for 60-80 minutes, the material is discharged, and the pasty ultraviolet absorber UV-531 is obtained after passing through the mill for 3 to 5 times. 0.2 ~ 0.5mm. As a release agent, methyl silicone oil can prevent raw silicone rubber and UV absorber UV531 from adhering to th...

Embodiment 2

[0045] refer to figure 1And Table 2, Table 2 lists the raw material ratio (parts by weight) of this embodiment, wherein the raw silicone rubber is methyl vinyl silicone rubber, and its vinyl content is 0.13-0.20%. The method for preparing the mixed rubber for light aging resistant composite insulators according to the ratio of raw materials in Table 2, the steps are the same as those in Example 1, the difference is that the weight of raw materials put into each step is different, the specific difference is:

[0046] Step D: pretreatment UV absorber UV-531, drop into raw silicone rubber, UV absorber UV-531 and methyl silicone oil in the kneader, wherein the ratio of raw silicone rubber to UV absorber UV-531 is 100: 50, a small amount of methyl silicone oil, after kneading for 60-80 minutes, the material is discharged, and the pasty ultraviolet absorber UV-531 is obtained after passing through the mill for 3-5 times, and the roll distance of the mill is 0.2-0.5 mm.

[0047] St...

Embodiment 3

[0053] refer to figure 1 And Table 3, Table 3 lists the raw material proportions (parts by weight) of this embodiment, wherein the silicone rubber raw rubber is methyl vinyl silicone rubber, and its vinyl content is 0.21-0.24%. The method for preparing the mixed rubber for light aging resistant composite insulators according to the ratio of raw materials in Table 3, the steps are the same as in Example 1, the difference is that the weight of raw materials put into each step is different, the specific difference is:

[0054] Step D: Pretreatment UV absorber UV-531, drop into raw silicone rubber, UV absorber UV-531 and methyl silicone oil in the kneader, wherein the ratio of raw silicone rubber to UV absorber UV-531 is 100: 60, a small amount of methyl silicone oil, after kneading for 60-80 minutes, the material is discharged, and the pasty ultraviolet absorber UV-531 is obtained after passing through the mill for 3-5 times, and the roll distance of the mill is 0.2-0.5 mm.

[...

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Abstract

The invention relates to a technology for preparing a blend for a composite insulator, and provides a light ageing resistant blend for a composite insulator and a preparation method thereof. The light ageing resistant blend is prepared from the following raw materials in part by weight: 100 parts of raw silicon rubber, 3 to 10 parts of activated zinc oxide, 18 to 40 parts of modified fumed silica, 0 to 5 parts of vinyl silicone oil, 1 to 10 parts of silane coupling agent, 1 to 6 parts of hydroxy silicone oil, 90 to 180 parts of active aluminum hydroxide powder, 0.2 to 2 parts of hydro silicon oil and 0.1 to 1 part of ultraviolet absorber (UV-531), and can be prepared by the conventional blend preparation process. The invention also provides a new preparation process, which comprises the following steps of: preparing a blend A and a blend B; and kneading, recycling, cooling and filtering the blend A and the blend B to obtain the light ageing resistant blend for the composite insulator. The blend has good ultraviolet ageing resistance, and is suitable for composite insulators in high altitude areas.

Description

technical field [0001] The invention relates to the preparation technology of mixed rubber for composite insulators. Background technique [0002] Silicone rubber compound is currently the most widely used composite insulator shed sheath material. Its raw rubber is generally polydimethylsiloxane (PDMS) with a molecular weight of 400,000 to 800,000, also known as "methyl vinyl." "Silicone rubber" is a colorless, odorless, non-toxic, and mechanically impurity-free gel. In the process of mixing raw rubber, appropriate reinforcing agents, structural control agents, mold release agents, heat-resistant agents, etc. are added to assist After preliminary kneading, heating, vacuum kneading and kneading, the mixed rubber for composite insulators is prepared, and then injected and molded to make composite insulator shed sheaths, which endow composite insulators with excellent electrical insulation properties, mechanical performance and weatherability. [0003] With the development of...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/06C08L83/05C08K13/06C08K5/132C08K3/22C08K3/36B29B7/28
Inventor 盘素芬宁惠晏坚军平啟源李燕林叶玉芬
Owner 广州麦科凌电力装备有限公司
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