Vulcanizing agent system for fluororubber, fluororubber compound and application

A fluororubber raw rubber and fluororubber technology, applied in the field of fluororubber, can solve problems such as poor fluororubber performance, and achieve the effects of good chemical resistance and low compression set

Active Publication Date: 2020-05-01
HAINING JIACHENG RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the above mechanism, it can be found that the bisphenol vulcanization system only provides dispersed crosslinking at the two terminals, which will cause defects in the overall crosslinking network of the fluororubber and lead to poor performance of the fluororubber part

Method used

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  • Vulcanizing agent system for fluororubber, fluororubber compound and application
  • Vulcanizing agent system for fluororubber, fluororubber compound and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of CF 3 C(C 6 H5OH) 3 : Add 650g of 1,1,1-tris(4-hydroxyphenyl)ethane and 1000ml of polyfluoroethanol into the autoclave, stir to make it dissolve evenly. Frozen brine was introduced into the jacket of the reaction kettle to keep the temperature of the reaction system below 5°C, and then fluorine gas was slowly introduced into the reaction kettle for 5 hours, then the fluorine gas was stopped, and the fluorine gas was blown off with nitrogen, and then vacuumed out to remove the remaining inside of the kettle gas. The reaction product was separated, filtered, washed and dried at low temperature to obtain 702 g of white solid, namely 1,1,1-tris(4-hydroxyphenyl)trifluoroethane (triphenol AF). The latter was determined to have a melting point of 246-252°C, 1 H-NMR spectrum: 9.105 (s, 2H, PH-OH), 6.726 (d, 4H, PH), 7.182 (d, 4H, PH).

[0033]Put 100g of binary fluorine rubber on a two-roller mixer for 5 minutes, then add 3g of active magnesium oxide, 5g of c...

Embodiment 2

[0035] Change the amount of bisphenol AF to 1.7g and the amount of triphenol AF to 0.3g, and other conditions are the same as in Example 1. The vulcanization properties of the obtained mixed rubber and the physical and chemical properties of the vulcanized rubber obtained through secondary vulcanization are measured and summarized respectively. In Table 1 and Table 2.

Embodiment 3

[0037] Change the amount of bisphenol AF to 1.5g and triphenol AF to 0.5g, and other conditions are the same as in Example 1. Measure the vulcanization properties of the obtained mixed rubber and the physical and chemical properties of the vulcanized rubber obtained through secondary vulcanization, and summarize them respectively In Table 1 and Table 2.

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Abstract

The invention discloses a vulcanizing agent system for fluororubber. The vulcanizing agent system comprises bisphenol AF, an onium compound and a fluorinated polyphenol hydroxyl compound. The invention also discloses a fluororubber compound. The fluororubber compound comprises the following raw materials in parts by mass: 100 parts of raw fluororubber, 6 to 10 parts of an acid acceptor, 20 to 40 parts of a coloring filling material, 0.5 to 1.5 parts of a release agent, 1 to 2 parts of the bisphenol AF, 0.16 to 0.5 part of benzyltriphenylphosphonium chloride BPP and 0.2 to 0.6 part of 1,1,1-tri(4-hydroxyphenyl)trifluoroethane. The invention also provides an application of the fluororubber compound in sealing products. The vulcanizing agent system provided by the invention is used for the fluororubber compound; and the prepared fluororubber compound and a sealing product have lower compression set, better chemical resistance and better comprehensive mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of fluororubber, and in particular relates to a vulcanizing agent system for fluororubber, fluororubber compound and application thereof. Background technique [0002] Fluorine rubber is a kind of polymer elastomer containing fluorine atoms in the main chain or side chain, which has excellent heat resistance, chemical resistance, oil resistance, ozone resistance and weather resistance. During the processing of fluorine rubber, the vulcanization process is a relatively complex chemical reaction process. The vulcanization system, vulcanization process and processing conditions used will cause different cross-linking structures, cross-linking densities and distributions to be formed between rubber molecules. As a result, vulcanized fluorine rubber products can obtain different physical and chemical properties and use effects. Among them, the selection and composition of the vulcanizing agent system for fluoror...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/136C08K5/50C08L27/18C08L27/16C08L91/06C08K13/02C08K3/22C08K3/04
CPCC08K5/136C08K5/50C08K2003/2206C08K2003/222C08K2201/014C08L27/16C08L27/18C08L2201/08C08L91/06C08K13/02C08K3/22C08K3/04
Inventor 方仕江李海华李群峰
Owner HAINING JIACHENG RUBBER CO LTD
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