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Premixed fluororubber gum with improved thermal tear resistance and preparation method thereof

A technology of tearing performance and fluororubber raw rubber, which is applied in the field of fluororubber premixed rubber and its preparation, can solve the problems of poor thermal tear resistance and dispersion performance, achieve good thermal tear resistance, improve dispersibility, Good high dispersion effect

Active Publication Date: 2013-03-13
成都晨光博达新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcomings of the above-mentioned prior art medium fluorine rubber premixed rubber with poor heat tear resistance and poor dispersion performance, and to provide a fluorine rubber premix with improved heat tear resistance and high dispersion performance Rubber and its preparation method, the present invention improves its thermal tear resistance by improving the formula of fluororubber premixed rubber, effectively improving the qualified rate of fluororubber products; meanwhile, it also effectively improves the dispersion of fluororubber premixed rubber properties, so that the fluororubber compound prepared by fluororubber premix has better stability, making it more widely applicable to various industries

Method used

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  • Premixed fluororubber gum with improved thermal tear resistance and preparation method thereof
  • Premixed fluororubber gum with improved thermal tear resistance and preparation method thereof

Examples

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Effect test

Embodiment 1

[0037] A modified fluorine rubber premix, consisting of the following parts by weight:

[0038] 80 parts of L2 masterbatch, 1 part of barium sulfate, 0.1 part of PFPE derivative, 0.1 part of fatty alcohol, 5 parts of modified white carbon black masterbatch;

[0039] The L2 masterbatch is prepared by bisphenol AF: vulcanization accelerator BPP: fluorine rubber raw rubber in a mass ratio of 1:0.5:50, wherein the fluorine rubber raw rubber is fluorine rubber 26 and the Mooney viscosity is 15;

[0040] The preparation process of the L2 masterbatch is as follows:

[0041] A. First melt the bisphenol AF and vulcanization accelerator BPP in the above ratio in a stainless steel melting tank at a melting temperature of 150°C and a time of 4 hours. After melting, the material is discharged and placed in a stainless steel receiving tray, at room temperature. Naturally cool to obtain solid block raw materials;

[0042] B. The solid material obtained in step A is pulverized with a high-efficiency p...

Embodiment 2

[0049] A modified fluorine rubber premix, which is composed of the following parts by weight:

[0050] 60 parts of L2 masterbatch, 5 parts of barium sulfate, PFPE derivatives, 1.5 parts, 1.5 parts of fatty alcohol, 10 parts of modified white carbon black masterbatch;

[0051] The L2 masterbatch is prepared by bisphenol AF: vulcanization accelerator BPP: fluorine rubber raw rubber in a mass ratio of 2:0.6:50, wherein the fluorine rubber raw rubber is fluorine rubber 246, and the Mooney viscosity is 30;

[0052] The preparation process of the L2 masterbatch is:

[0053] A. First melt the above-mentioned parts by weight of bisphenol AF and vulcanization accelerator BPP in a stainless steel melting tank. The melting temperature is 180°C and the melting time is 5 hours. After melting, the material is discharged and placed in a stainless steel receiving tray at room temperature. Naturally cool under conditions to obtain solid block materials;

[0054] B. The solid material obtained in step A...

Embodiment 3

[0061] A modified fluorine rubber premix, which is composed of the following parts by weight:

[0062] 80 parts of L2 masterbatch, 3 parts of barium sulfate, 1 part of PFPE derivative, 1 part of fatty alcohol, 15 parts of modified white carbon black masterbatch;

[0063] The L2 masterbatch is prepared from bisphenol AF: vulcanization accelerator BPP: fluorine rubber raw rubber in a mass ratio of 2:1:50, wherein the fluorine rubber raw rubber is fluorine rubber 246, and the Mooney viscosity is 20 fluorine rubber 246 is 85 parts, and fluororubber 246 with a Mooney viscosity of 15 is 15 parts;

[0064] The preparation process of the L2 masterbatch is:

[0065] A. First, bisphenol AF and vulcanization accelerator BPP are melted in a stainless steel melting tank according to the above ratio. The melting temperature is 220 ℃, and the melting time is 5 hours. After melting, the material is discharged and placed in the stainless steel receiving tray at room temperature. Cool down naturally t...

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Abstract

The invention discloses premixed fluororubber gum with improved thermal tear resistance and a preparation method thereof. The premixed fluororubber gum with improved thermal tear resistance comprises the following components: 50 to 100 parts of L2 masterbatch, 1 to 5 parts of barium sulfate, 0.1 to 1.5 parts of perfluoropolyether (PFPE) derivative, 0.1 to 1.5 parts of fatty alcohol and 5 to 15 parts of modified white carbon black. The preparation method comprises the following steps: A, preparing the L2 masterbatch; and B, adding the barium sulfate, PFPE derivative, fatty alcohol and modifiedwhite carbon black in turn, plasticizing, thinning, fully mixing and discharging sheets. The modified premixed fluororubber gum prepared by the method has high thermal tear resistance, and can effectively improve the yield of fluororubber products; in addition, the modified premixed fluororubber gum also has high dispersibility, so pre-blended fluororubber gum made of the premixed fluororubber gum is very stable and can be widely used in various industries.

Description

technical field [0001] The present invention relates to a fluororubber premixed rubber and its preparation method, more specifically, to a fluororubber premixed rubber with significantly improved thermal tear resistance and high dispersion performance and its preparation method . Background technique [0002] In the rubber industry, fluorine rubber has excellent properties unmatched by other rubbers, such as high temperature resistance, oil resistance, corrosion resistance to various strong acids and alkalis and chemicals, resistance to ozone and various oxidants, and radiation resistance. Fluorine rubber has been widely used in military aerospace, petrochemical, machinery manufacturing, construction engineering, instrumentation and automobile manufacturing and other fields. The special performance of fluororubber is determined by the structural characteristics of fluorine atoms in its molecules, but it is precisely because of this structural characteristic that it also bri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/12C08L71/00C08K13/06C08K3/36C08K3/30C08K5/05C08K5/136C08J3/22
Inventor 刘皓周家发张林
Owner 成都晨光博达新材料股份有限公司
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