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Low-temperature-resistant perfluoroether rubber composition as well as preparation method and application thereof

A technology of perfluoroether rubber and low temperature resistance, which is applied in the field of polymer rubber material preparation, and can solve the problems of low temperature resistance and chemical medium resistance of perfluoroether rubber composition at the same time

Active Publication Date: 2021-03-09
SHANGHAI REAL SEALING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the low temperature resistance and chemical medium resistance of the perfluoroether rubber composition do not need to be taken into account at the same time in the prior art, the present invention provides a low temperature resistant Perfluoroether rubber composition and its application

Method used

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  • Low-temperature-resistant perfluoroether rubber composition as well as preparation method and application thereof
  • Low-temperature-resistant perfluoroether rubber composition as well as preparation method and application thereof
  • Low-temperature-resistant perfluoroether rubber composition as well as preparation method and application thereof

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Effect test

Embodiment 1

[0027] The formula of embodiment 1 low temperature perfluoroether rubber composition

[0028] Table 1 shows the formulations of No. 1 to No. 9 low-temperature perfluoroether rubber compositions. For detailed ratios, please refer to the ratio of each component in the table.

[0029] Table 1 No. 1-9 low-temperature perfluoroether rubber composition formula

[0030]

Embodiment 2

[0031] Performance test of embodiment 2 low temperature perfluoroether rubber composition

[0032] Weigh each component according to the ratio of No. 1 to No. 9 formulations (parts by weight) in Example 1, wrap the perfluoroether rubber and the liquid fluoroelastomer rubber on a double-roll mill, and mix the crosslinking agent and accelerator Auxiliary materials such as carbon black and processing aids are added to the open mill and mixed with rubber, mixed evenly at a roller temperature lower than 80°C and then released into sheets to obtain low-temperature perfluoroether rubber compound. The mixed rubber was molded and vulcanized into a standard rubber test piece at a temperature of 180°C, under the condition of one-stage vulcanization for 10 minutes, and then vulcanized in a second stage at a temperature of 200°C for 4 hours, and the rubber test piece was prepared according to a standard test sample and The performance test was carried out, and the performance data of No. 1...

Embodiment 3

[0046] Embodiment 3 Preparation of low temperature perfluoroether rubber composition

[0047] (1) 90 parts by weight of perfluoroether rubber PFR 94 and 10 parts by weight of liquid fluoroelastomer X-71-906 was masticated evenly on a two-roller mill and covered with rolls, and then 3.1 parts by weight of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, 1.5 parts by weight Triallyl isocyanurate, filler carbon black N990 of 10 parts by weight, filler carbon black N550 of 5 parts by weight, processing aid HT290 of 0.9 parts by weight are pre-mixed uniformly, and gradually add in the mill, Mix rubber with auxiliary materials;

[0048] (2) After mixing the rubber with the auxiliary materials, cut the rubber mixture of the rollers 5 times on the left and right, adjust the roller distance of the open mill to the minimum, roll or make triangle bags 10 times, and control the entire mixing time at 15 minutes. Mix the rubber material evenly and then release the sheet to obtain a low-te...

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Abstract

The invention belongs to the technical field of perfluoroether rubber compositions, and discloses a low-temperature-resistant perfluoroether rubber composition as well as a preparation method and application thereof. The composition can be vulcanized and molded into a low-temperature-resistant perfluoroether rubber product. The low-temperature perfluoroether rubber composition comprises 50-100 parts by weight of perfluoroether rubber, 10-50 parts by weight of a liquid fluororubber elastomer, 0.5-3 part by weight of a cross-linking agent, 0-4 parts by weight of an accelerant, 1-30 parts by weight of a filler and 1-3 parts by weight of a processing aid; a rubber product prepared by heating, pressurizing and vulcanizing the composition has excellent low-temperature resistance and high cost performance, and can be widely applied to low-temperature corrosion-resistant environmental conditions in petrochemical industry.

Description

technical field [0001] The invention relates to the preparation of polymer rubber materials, in particular to a low temperature resistant perfluoroether rubber composition and its preparation method and application. Background technique [0002] The molecular chain of perfluoroether rubber (FFKM) does not contain C-H bonds. It is a monomer of tetrafluoroethylene (TFE) and perfluoroalkyl vinyl ether (PAVE) or perfluoroalkoxymethylene vinyl ether (PMOVE). It is a ternary copolymerized elastomer of a vulcanization point monomer, which has excellent chemical resistance and thermal stability similar to polytetrafluoroethylene (PTFE) polymers, and is widely used in aerospace, petrochemical, food, pharmaceutical, and semiconductor industries, etc. . The glass transition temperature (T g ) generally at 0°C, the low-temperature sealing performance is poor, and it cannot meet the requirements of some low-temperature working conditions; the ternary compound of tetrafluoroethylene (TF...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08L71/00C08K13/02C08K3/04C08K5/14C08K5/3492
CPCC08L27/18C08L71/00C08K13/02C08K3/04C08K5/14C08K5/34924
Inventor 李恩军苟文亮李耿褚斌斌
Owner SHANGHAI REAL SEALING TECH CO LTD
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