High-temperature vulcanized silicone rubber for cold-contracted sleeve and process for high-temperature vulcanized silicone rubber

A high-temperature vulcanization and cold-shrinkable sleeve technology, applied in the field of chemical materials, can solve the problem of low tensile strength at constant elongation, and achieve high tensile strength at constant elongation, low permanent deformation at constant elongation, and elongation at break. high effect

Inactive Publication Date: 2015-11-25
SHENZHEN COTRAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Low tensile strength at constant elongation

Method used

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  • High-temperature vulcanized silicone rubber for cold-contracted sleeve and process for high-temperature vulcanized silicone rubber
  • High-temperature vulcanized silicone rubber for cold-contracted sleeve and process for high-temperature vulcanized silicone rubber
  • High-temperature vulcanized silicone rubber for cold-contracted sleeve and process for high-temperature vulcanized silicone rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a high-temperature vulcanized silicone rubber for cold-shrinkable sleeves, wherein the high-temperature vulcanized silicone rubber for cold-shrinkable sleeves contains the following raw material components and quantities: Silicone raw rubber 1: 12-20 parts, Silicone raw rubber 2: 15-23 parts, Silicone rubber 3: 47-66 parts, Silicone rubber 4: 8-20 parts, Silicone rubber 5: 1-8 parts, Vinyl silicone oil: 0-3 parts, Dimethicone oil: 0 ~5 parts, white carbon black: 28~40 parts, silazane: 2~8 parts, deionized water: 1~4 parts, silane coupling agent: 1.2~5 parts, internal release agent: 0.08~0.3 parts .

[0028] Among them, raw silicone rubber 1 and raw silicone rubber 2 respectively use methyl-terminated methyl vinyl silicone rubber raw rubber with different vinyl molar contents; their structural formulas are:

[0029]

[0030] Specifically, for raw rubber 1, choose methyl-terminated methyl vinyl silicone rubber with a molecular weight of 550,00...

Embodiment 2

[0046] This embodiment provides a process for preparing the high-temperature vulcanized silicone rubber for the cold shrinkable sleeve described in Example 1, wherein the process comprises the following steps:

[0047] First, step A: batching and mixing: batching is carried out according to the raw material components and quantities in Example 1. After the ingredients are prepared, silicone raw rubber 1, silicon raw rubber 2, silicon raw rubber 3, silicon Raw rubber 4, silicone raw rubber 5, vinyl silicone oil and / or dimethyl silicone oil, white carbon black, silazane, deionized water, silane coupling agent, and internal mold release agent are added to the kneader and kneaded into a group Finally, close the kneader, and leave it at room temperature for 8 hours, and leave it for use.

[0048] Then, perform step B: that is, high-temperature vacuum mixing: put the agglomerated material into a kneader, and then knead at a high temperature for 3 hours, wherein the vacuum degree of ...

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Abstract

The invention discloses high-temperature vulcanized silicone rubber for a cold-contracted sleeve and a process for the high-temperature vulcanized silicone rubber. The silicone rubber is prepared from the following raw materials in parts by mass: 12 to 20 parts of first silicone raw rubber, 15 to 23 parts of second silicone raw rubber, 47 to 66 parts of third silicone raw rubber, 8 to 20 parts of fourth silicone raw rubber, 1 to 8 parts of fifth silicone raw rubber, 0 to 3 parts of vinyl silicone oil, 0 to 5 parts of dimethylsilicone oil, 28 to 40 parts of white carbon black, 2 to 8 parts of silazane, 1 to 4 parts of de-ionized water, 1.2 to 5 parts of a silane coupling agent and 0.08 to 0.3 part of an internal releasing agent, wherein the first silicone raw rubber and the second silicone raw rubber are methyl-terminated methylvinyl silicone raw rubber with different vinyl molar contents; the third silicone raw rubber, the fourth silicone raw rubber and the fifth silicone raw rubber are vinyl-terminated methylvinyl silicone raw rubber with different vinyl molar contents. The cold-contracted sleeve made from the silicone rubber is strong in tear strength and stretching tensile strength, high in breakage elongation and low in stretching permanent deformation rate.

Description

technical field [0001] The invention relates to the field of chemical materials, in particular to a high-temperature vulcanized silicone rubber for cold-shrink sleeves and a process method thereof. Background technique [0002] In the prior art, high-temperature vulcanized silicone rubber itself has good resilience, electrical insulation and weather resistance, and is widely used in cable accessories, electronic appliances, household appliances, testing instruments and other products that require waterproof insulation and sealing. The silicone rubber of this project The cold-shrinkable tube produced can be widely used in the waterproof insulation sealing of communication base station joints, power cable joints, radio and television feeder joints, indoor distribution base station joints, cable TV cable joints, etc. The cold-shrinkable tubes have good elasticity and can automatically shrink and hold The tight cable connector can provide reliable guarantee for long-term stable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/07C08L83/05C08K9/06C08K3/36C08K5/5445
Inventor 宋斌周东
Owner SHENZHEN COTRAN NEW MATERIAL CO LTD
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