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Heat resisting fluororubber composition and sulfidization molding products thereof

A fluororubber and composition technology, applied in the field of heat-resistant fluororubber compositions and their vulcanized molded products, can solve the problems of limited supply, high price of perfluororubber, attenuation of physical properties of rubber, etc., and achieve the effect of improving heat resistance

Inactive Publication Date: 2008-11-19
上海道氟实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be used for a long time when the service temperature is below 250°C, but under high temperature conditions, such as above 300°C, the physical properties of the rubber decay quickly
At present, only perfluororubber can be used as a substitute, but the price of perfluororubber is expensive, 400 times that of ordinary fluororubber, and there are only three companies in the world producing it, so the supply is also limited

Method used

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  • Heat resisting fluororubber composition and sulfidization molding products thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]In 100 grams of vinylidene fluoride (VDF) / hexafluoropropylene (HFP) copolymer (trade name FE2603, Mooney viscosity ML1+10, 121 ° C = 70), add 2 grams of polyol-based vulcanizing agent bisphenol A F ( Trade name is BF6), 0.5 grams of quaternary phosphorus salt (trade name is BPP, vulcanization accelerator), 3 grams of magnesium oxide, 6 grams of calcium hydroxide, 30 grams of thermal carbon black (trade name is N990) and 1 gram of oxide cerium. The mixture was kneaded at room temperature for 20 minutes using an open rubber mixer to obtain a composition for vulcanization.

[0035] Next, use a metal mold plated with hard chromium, pressurize and vulcanize for 10 minutes under the conditions of a pressurized pressure of 25 tons and a pressurized temperature of 170°C, and process and form a 150x150x2mm test piece, and test it after two-stage vulcanization at 250°Cx16 hours Tensile Strength, % Elongation and Hardness. After aging in air at 300°C for 24 hours, the above-menti...

Embodiment 2

[0037] Except for adding 5 grams of cerium oxide, the fluororubber composition was prepared in the same manner as in Example 1, and its various properties were tested.

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Abstract

The invention discloses a heat resistant fluorubber composition and a cured product for the same. The fluorubber composition comprises 100 weight portions of fluorubber, 0.1 to 10 weight portions of rare earth metal oxide and 0.05 to 10 weight portions of curing agent. The fluorubber composition has good heat resistance after sulfurization.

Description

technical field [0001] The present invention relates to a heat-resistant fluororubber composition and its vulcanized molded product, especially a heat-resistant fluororubber composition and its vulcanized molded product for manufacturing engine oil seals and sealants. Background technique [0002] Viton is a kind of high temperature resistant and medium resistant rubber, which is widely used in the manufacture of engine oil seals, sealants and other products. It can be used for a long time when the service temperature is below 250°C, but under high temperature conditions, such as above 300°C, the physical properties of the rubber decay quickly. At present, perfluororubber can only be used as a substitute, but the price of perfluororubber is 400 times that of ordinary fluororubber, and only three companies in the world produce it, so the supply is also limited. [0003] Therefore, there is an urgent need to improve the heat resistance of non-perfluororubber to meet the perfo...

Claims

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Application Information

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IPC IPC(8): C08L27/12C08K3/22C08J5/00
Inventor 赵轶华司徒琛
Owner 上海道氟实业有限公司
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