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Preparation method of ultraviolet light radiation crosslinked silicon rubber

A technology of radiation cross-linking and silicone rubber, applied in the field of preparation of cross-linked silicone rubber, can solve the problems of poor performance of cross-linked silicone rubber, harsh protection requirements, complicated operation and maintenance, etc., and achieves improved depth and uniformity, and excellent mechanical properties. Effect

Active Publication Date: 2013-10-30
HONGLONGJIANG ORIENT SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problems of high energy consumption and low production efficiency in the existing chemical cross-linking method for preparing cross-linked silicone rubber; the high-energy radiation cross-linking method has high equipment investment, complicated operation and maintenance, harsh protection requirements, and low product quality. The problem of high cost and the poor performance of the obtained crosslinked silicone rubber provides a preparation method for ultraviolet radiation crosslinked silicone rubber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0020] Specific Embodiment 1: In this embodiment, ultraviolet light radiation crosslinking silicone rubber is composed of 100 parts by weight of silicone rubber, 10 to 150 parts of inorganic filler, 0.1 to 5.0 parts of free radical photoinitiator, and 0.1 to 5.0 parts of cationic photoinitiator. agent, 0.1-5.0 parts of multifunctional cross-linking agent, 0.1-5.0 parts of cross-linking accelerator and 1-5 parts of silane coupling agent.

[0021] In view of the fact that the molecular composition and chain structure of silicone rubber are different from those of polyolefin materials and the use of a large number of inorganic reinforcing fillers, the photocrosslinking efficiency is so low that a satisfactory degree of crosslinking cannot be obtained. A large number of experimental screenings have been carried out on the photo-crosslinking material formulation system, and it is found that by adding cationic photoinitiators (which can still undergo further reactions to produce cros...

specific Embodiment approach 2

[0023] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the silicone rubber is one or a combination of dimethyl vinyl silicone rubber and methyl vinyl silicone rubber, wherein the methyl vinyl The molar content of vinyl in silicone rubber is 0.01-5%. Others are the same as in the first embodiment.

[0024] In this embodiment, when the silicone rubber is a composition, each component is combined in any ratio.

specific Embodiment approach 3

[0025] Specific embodiment three: this embodiment is different from specific embodiment one or two in that: the inorganic filler is one or more combinations of white carbon black, calcium carbonate, kaolin and pottery clay;

[0026] The silica is one or more combinations of hydrophobic or hydrophilic fumed silica and precipitated silica, wherein the fumed silica, precipitated silica, carbonic acid The specific surface area of ​​calcium, kaolin and clay is 20-400m 2 / g. Others are the same as in the first or second embodiment.

[0027] In this embodiment, when the inorganic filler is a composition, each component is combined in any ratio.

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Abstract

The invention discloses ultraviolet light radiation crosslinked silicon rubber and a preparation method thereof, which relates to crosslinked silicon rubber and a preparation method thereof and is used for solving the problems of high energy consumption, low efficiency, large equipment investment, high cost and poor product performance existing in the conventional preparation method. The ultraviolet light radiation crosslinked silicon rubber is prepared from silicon rubber, an inorganic filler, a free radical photoinitiator, a cationic photoinitiator, a polyfunctional group crosslinking agent, a crosslinking accelerating agent and a silane coupling agent. The method comprises the following steps of: mixing the silicon rubber, the inorganic filler, the free radical photoinitiator, the cationic photoinitiator, the polyfunctional group crosslinking agent, the crosslinking accelerating agent and the silane coupling agent; stirring to obtain a mixture; preheating a plastic extruding machine; feeding the mixture; and crosslinking an extruded green glue stock in ultraviolet light radiation crosslinking equipment to obtain a product. The method has the advantages of simple process, easiness for protecting and low cost; and the obtained crosslinked silicon rubber has excellent physical property, the crosslinking depth and uniformity are enhanced remarkably, and the crosslinked silicon rubber is applied to electric wire insulating layers, sealing rings and the like.

Description

technical field [0001] The invention relates to a preparation method of crosslinked silicone rubber. Background technique [0002] Silicone rubber has been widely used in electronics, electrical appliances, automobiles, machinery manufacturing, Chemical, food, daily necessities, medical and health and other fields. [0003] At present, there are two main cross-linking methods of silicone rubber: chemical cross-linking method and high-energy radiation method. The chemical crosslinking method of silicone rubber is mainly divided into two categories: high temperature vulcanization and room temperature vulcanization according to the vulcanization method. Among them, high temperature vulcanization is divided into peroxide type and addition type according to different vulcanizing agents. The corresponding vulcanization mechanism is free radical vulcanization and vulcanization. Addition vulcanization. The former is mainly through the decomposition of peroxides at high temperatur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/12C08F2/44C08F2/48C08K3/36C08K3/26C08K3/34
Inventor 瞿保钧鲍文波刘红叶磊施文芳刘岩吴强华邓钧
Owner HONGLONGJIANG ORIENT SCI & TECH