Extruded fluororubber composite for fuel pipes of electronic fuel injection vehicles and preparation method thereof

Abstract

The invention discloses an extruded fluororubber composite for fuel pipes of electronic fuel injection vehicles and a preparation method thereof and belongs to the field of chemical industry. The extruded fluororubber composite is composed of 100 parts of high-fluorine-content fluororubber raw rubber, 5-10 parts of acid acceptor, 5-10 parts of softener, 10-20 parts of fortifier, 1-5 parts of processing aid, 1.5-3 parts of vulcanizer and promoter, and comprises, by mass, 25-55% of polyvinylidene fluoride and 10-35% of hexafluoropropylene polymer (fluorine 26) or 25-45% of vinylidene fluoride, 15-35% of tetrafluoroethylene, 10-35% of hexafluoropropylene polymer (fluorine 246), 25-45% of tetrafluoroethylene, 25-55% of hexafluoropropylene polymer (AFLAS) 25-55% of polyvinylidene fluoride, 10-35% of hexafluoropropylene and G-type polymer formed by region polymerizing of fluorine-containing monomer or iodine-containing vulcanizing point monomer containing active crosslinking points. High-fluorine-content fluororubber in bimodal distribution is taken as base gum, and fluorocarbon oil or liquid fluororubber is taken as the softener, so that the composite is good in extrusion performance and has oil resistance and temperature resistance that fluororubber have inherently.

Description

technical field [0001] The invention relates to a fluororubber composition extruded from fuel pipes of electric jet vehicles and a preparation method thereof, belonging to the field of chemical industry. Background technique [0002] Fluorine rubber, excellent in heat resistance, oxidation resistance, oil resistance, corrosion resistance and atmospheric aging resistance, has been widely used in the fields of aerospace, aviation, automobiles, petroleum and household appliances, and is irreplaceable in the cutting-edge defense industry the key material. Due to the rapid development of the automobile industry in recent years, the demand for fluorine rubber is also increasing, and the requirements are getting higher and higher. Compared with other rubbers, fluorine rubber is also expensive. In order to meet the needs of environmental protection and cost, fuel hoses for automobile engines are now generally reinforced by compounding fluorine rubber and chlorohydrin rubber with ...

AI Technical Summary

Problems solved by technology

However, due to the special properties of fluororubber, most fluororubbers on the market cannot meet the extrusion needs, especially for extrusion of small-diameter tubes, let alone composite extrusion of films with a thickness of about 5 microns.