Extrusion-grade fluororubber compound with low fuel oil permeability and preparation method thereof

A technology of fuel permeability and fluororubber raw rubber, which is applied in the field of fluororubber materials, can solve the problems of poor smoothness and flatness of the inner and outer walls of rubber hoses, poor rubber composite bonding performance, and poor extrusion flow performance, etc., to meet the environmental requirements Emission standards, improving extrusion processing performance, and reducing the effect of extrusion expansion

Active Publication Date: 2022-05-24
成都道弘氟橡胶有限公司
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AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide an extrusion-grade fluororubber compound with low fuel oil permeability and its preparation method to solve the problems of poor extrusion fluidity and extrusion swelling in the extrusion process of fluororubber in the prior art. High rate, poor smoothness and flatness of the inner and outer walls of the rubber hose, high fuel oil permeability, and poor bonding performance with other rubber compounds

Method used

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  • Extrusion-grade fluororubber compound with low fuel oil permeability and preparation method thereof
  • Extrusion-grade fluororubber compound with low fuel oil permeability and preparation method thereof
  • Extrusion-grade fluororubber compound with low fuel oil permeability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] To prepare the fluoroelastomer compound:

[0042] Take the fluorine content of 69%, wide molecular weight distribution, Mw / Mn≧5, molecular weight Mw are 100,000, 210,000, 320,000, 420,000, and 590,000 respectively, corresponding to Mooney viscosity ML121 ℃ (1+10) are 16, 25, 30, 40, 49, 20kg each of five kinds of ternary fluororubber raw rubber with different Mooney viscosity; according to the fluororubber mixing formula table in the following table 1 (each raw material is by weight), prepare it for use. Prepare fluororubber compound 1, fluorine rubber compound 2, fluorine rubber compound 3, fluorine rubber compound 4, and fluorine rubber compound 5 in sequence according to the following steps:

[0043]Table 1 Fluorine rubber compound formula table (Example 1 and Comparative Example 1)

[0044]

[0045] Preparation:

[0046] S1. Put the raw rubber into the mixer for 3 minutes according to the proportion, and the plasticizing temperature is 70-80℃;

[0047] S2. Add...

Embodiment 2

[0059] To prepare the fluoroelastomer compound:

[0060] Take 80kg of fluororubber raw rubber with a fluorine content of 70.5%, a wide molecular weight distribution, a molecular weight Mw of 290,000, and a Mooney viscosity of ML121°C (1+10) of 32. According to the fluororubber compounding formula in the following Table 3 The fluororubber rubber compound 6-9 in the table (each raw material is by weight) is ready for use. Take 40kg of fluororubber raw rubber with a fluorine content of 70.5%, a bimodal molecular weight distribution, a molecular weight Mw of 390,000, and a Mooney viscosity of ML121°C (1+10) of 34. The fluorine rubber compound 10-11 in the formula table (each raw material is by weight) is ready for use, and the fluorine rubber compound 6, fluorine rubber compound 7, fluorine rubber compound 8 are prepared in sequence according to the following steps, Fluorine rubber compound 9, fluorine rubber compound 10, fluorine rubber compound 11:

[0061] Table 3 Fluorine ru...

Embodiment 3

[0077] To prepare the fluoroelastomer compound:

[0078] Take 100kg of fluororubber raw rubber with a fluorine content of 69%, a bimodal molecular weight distribution, a molecular weight Mw of 370,000, and a Mooney viscosity of ML121°C (1+10) of 33. The fluororubber rubber compound 12-16 in the formula table (each raw material is by weight) is ready for use. Prepare the fluororubber compound 12, the fluorine rubber compound 13, the fluorine rubber compound 14, the fluorine rubber compound 15, and the fluorine rubber compound 16 in sequence according to the following steps:

[0079] Table 5 Fluorine rubber compound formula table (Example 3 and Comparative Example 3)

[0080]

[0081] Preparation:

[0082] S1. Put the raw rubber into the mixer for 2 minutes according to the proportion, and the plasticizing temperature is 70-80℃;

[0083] S2. Add vulcanizing agent, vulcanization accelerator and extrusion processing aid to the internal mixer in sequence according to the prop...

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Abstract

The invention provides an extrusion-grade fluororubber compound with low fuel oil permeability and a preparation method, which solves the problems of poor extrusion fluidity, large extrusion expansion rate, The technical problems of poor smoothness and flatness of the inner and outer walls of the rubber hose, high fuel permeability, and poor bonding performance with other rubber compounds. The preparation of the fluororubber compound comprises the following raw materials in parts by weight: 100 parts of fluororubber raw rubber; 1.2-2.5 parts of vulcanizing agent; 0.2-1.0 part of vulcanization accelerator; 6-15 parts of acid absorbing agent; 40; filler 10‑45; extrusion processing aid 1‑6 parts; process processing aid 1‑4 parts. The extrusion-grade fluororubber compound of the present invention not only ensures excellent physical and mechanical properties, but also significantly improves the extrusion process performance, reduces the extrusion expansion rate of fluororubber, effectively improves the fuel permeability and significantly improves the compatibility with other materials. Compound adhesive properties of rubber.

Description

technical field [0001] The invention relates to a fluorine rubber material, in particular to an extrusion-grade fluorine rubber compound with low fuel oil permeability and a preparation method. Background technique [0002] In the rubber industry, fluororubber has excellent properties unparalleled by other rubbers, such as high temperature resistance, oil resistance, corrosion resistance of various strong acids and alkalis and chemicals, resistance to ozone and various oxidants, and radiation resistance. Fluorine rubber has been widely used in the automotive industry, and one of the important applications is automotive fuel hoses. However, with the increasingly stringent environmental emission standards for automobiles, especially the implementation of China VI emission standards for automobiles, the fuel permeability of fluoro rubber hoses has increased. The requirements are becoming more and more demanding, and the traditional fluororubber hose can no longer meet its requi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08L27/20C08L27/18C08L91/06C08L23/06C08K13/02C08K3/22C08K3/30C08K5/136C08K5/50C08K5/3462
CPCC08L27/16C08L27/20C08L27/18C08K2003/222C08K2003/2206C08L2205/03C08L2203/18C08L91/06C08L23/06C08K13/02C08K3/22C08K3/30C08K5/136C08K5/50C08K5/3462
Inventor 周武刚张定文郑贤君
Owner 成都道弘氟橡胶有限公司
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