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Cross-linkable fluoroelastomer, its composition and cross-linked rubber molded product

A technology of fluoroelastomer and cross-linked rubber, which is applied in the field of fluoroelastomers, can solve problems such as insufficient production efficiency, impossibility of durable use, and failure to achieve mold release properties, and achieve excellent mold release properties

Inactive Publication Date: 2007-11-28
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Tetrafluoroethylene / propylene copolymer (hereinafter referred to as TFE / P copolymer) as a rubber material with excellent heat resistance and chemical corrosion resistance, used in harsh environments where conventional rubber materials cannot be used durablely
However, when this method is used, the production efficiency is not high because it requires heat treatment at high temperature for a long time
[0003] In addition, the fluoroelastomer composition prepared by mixing various blending materials into the heat-treated TFE / P copolymer obtained by this method has excellent properties when molding and crosslinking using a mold. cross-linking activity, but the release properties are not at the desired level

Method used

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  • Cross-linkable fluoroelastomer, its composition and cross-linked rubber molded product
  • Cross-linkable fluoroelastomer, its composition and cross-linked rubber molded product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Add 1 part of dicumene peroxide (Percumyl D, manufactured by NOF CORPORATION) to 100 parts of TFE / P copolymer (copolymer composition: TFE / P=56 / 44 (mol%), Mooney viscosity: 105), so that the half-life temperature for 1 minute: 175.2°C), and then mixed using a twin-roller mill, the mixture was placed in a single-screw extruder set at 300°C, and extruded with a residence time of 2 minutes to obtain Crosslinkable fluoroelastomer. The infrared absorption spectrum of the prepared cross-linkable fluoroelastomer is shown in Fig. 1 .

Embodiment 2 and 3

[0073] In the same manner as in Example 1, the treatment was carried out according to the conditions shown in Table 1, except that only the organic peroxide used was changed, thereby preparing a crosslinkable fluoroelastomer. In Example 2, tert-butylcumyl peroxide (Perbutyl C, produced by NOF CORPORATION, temperature at which the half-life is 1 minute: 173.3° C.) was used. In Example 3, 1,3-bis(tert-butylperisopropyl)benzene (Perbutyl P, produced by NOF CORPORATION, temperature at which the half-life is minutes: 175.4° C.) was used.

Embodiment 4 and 5

[0075] In the same manner as in Example 1, the treatment was carried out using the conditions shown in Table 1, the difference being that the organic peroxide used and the heat treatment conditions were changed, so as to prepare a crosslinkable fluoroelastomer. In Example 5, di-tert-butyl peroxide (Perbutyl D, produced by NOF CORPORATION, temperature at which the half-life is 1 minute: 185.9° C.) was used.

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Abstract

To provide a cross-linkable fluoroelastomer, a cross-linkable fluoroelastomer composition and a cross-linked rubber molded products thereof. A cross-linkable fluoroelastomer having a Mooney viscosity of from 20 to 300, obtainable by heat treating a mixture of a fluoroelastomer (A) and an organic peroxide (B) at a temperature of from 110 to 380°C for from 10 seconds to 3 hours; a fluoroelastomer composition comprising the cross-linkable fluoroelastomer, a cross-linking agent (C) and a cross-linking assistant (D); and cross-linked rubber molded products thereof.

Description

technical field [0001] The present invention relates to a fluoroelastomer capable of exhibiting excellent crosslinking activity and a high crosslinking rate, a fluoroelastomer composition comprising the fluoroelastomer, and a crosslinked rubber having excellent crosslinking physical properties molded products. Background technique [0002] Tetrafluoroethylene / propylene copolymer (hereinafter referred to as TFE / P copolymer) is a rubber material with excellent heat resistance and chemical corrosion resistance, which is used in harsh environments where conventional rubber materials cannot be used durablely. However, the TFE / P copolymer has poor crosslinking activity in the manufacture of rubber products. As an improved method, a method of performing heat treatment at a high temperature for a long time has been proposed (for example, Patent Document 1). However, when this method is used, the production efficiency is not high because heat treatment at a high temperature is requ...

Claims

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Application Information

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IPC IPC(8): C08F214/26C08K5/14C08L27/18C08J5/00
CPCC08K5/0025C08F8/00C08K5/14C08F14/18C08L27/12
Inventor 淀川正英斉藤正幸
Owner ASAHI GLASS CO LTD
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