Search

CN-122011629-A - Fluororubber material and preparation method and application thereof

CN122011629ACN 122011629 ACN122011629 ACN 122011629ACN-122011629-A

Abstract

The invention discloses a fluororubber material, a preparation method and application thereof, wherein the fluororubber material comprises the following raw materials in parts by mass: 100 parts of fluororubber raw rubber, 25-35 parts of thermal cracking carbon black N990, 5-15 parts of quick extrusion carbon black N550, 3-6 parts of heat resistant agent, 1.5-3 parts of vulcanizing agent, 2.5-4 parts of vulcanizing aid triallyl isocyanurate, 1-2 parts of processing aid and 10-50 parts of carbon nano tube-ethanol mixed solution; according to the invention, through the synergistic effect of four core mechanisms of intrinsic characteristics of a matrix material, synergistic reinforcement of fillers, optimization of a vulcanization crosslinking network and precise modification of carbon nanotubes, all the mechanisms are mutually supported, the rubber material with excellent high temperature resistance, high pressure resistance, low compression set and high strength retention rate is prepared, and the fluororubber sealing ring material for ultra-deep well logging equipment is suitable for severe working conditions of 8000-10000 m ultra-deep wells, above 200 ℃ and above 180 MPa.

Inventors

  • SUN BO
  • YANG XIAO
  • JI JIANBO
  • ZHANG HENG
  • FENG JING
  • MIAO XING
  • AN JING
  • YE YANJIE

Assignees

  • 西安向阳航天材料股份有限公司

Dates

Publication Date
20260512
Application Date
20260228

Claims (10)

  1. 1. The fluororubber material is characterized by comprising, by mass, 100 parts of fluororubber raw rubber, 25-35 parts of thermal cracking carbon black N990, 5-15 parts of fast extrusion carbon black N, 3-6 parts of a heat resistant agent, 1.5-3 parts of a vulcanizing agent, 2.5-4 parts of a vulcanizing auxiliary agent triallyl isocyanurate, 1-2 parts of a processing auxiliary agent and 10-50 parts of a carbon nanotube-ethanol mixed solution.
  2. 2. The fluororubber material according to claim 1, wherein the fluororubber raw rubber is fluororubber raw rubber or perfluoroether raw rubber with fluorine content more than or equal to 69%.
  3. 3. The fluororubber material according to claim 1, wherein said heat-resistant agent comprises any one of calcium oxide, magnesium oxide and zinc oxide.
  4. 4. The fluororubber material as claimed in claim 1, wherein said vulcanizing agent comprises any one of 2, 5-dimethyl-2, 5-di-t-butylperoxyethane, dicumyl peroxide and di-t-butylperoxycumene.
  5. 5. The fluororubber material of claim 1, wherein said processing aid comprises one or more of WS280, palm wax, HT-290, fluorowax.
  6. 6. The fluororubber material according to claim 1, wherein the carbon nanotube-ethanol mixed solution is prepared by uniformly mixing absolute ethanol and multi-wall carbon nanotubes according to the mass ratio of (300-600): 1-1.5.
  7. 7. A method for producing the fluororubber material according to any one of claims 1 to 6, comprising the steps of: Step 1, adding weighed thermal cracking carbon black N990 and quick extrusion carbon black N550 in proportion into weighed fluororubber raw rubber, and carrying out thin pass through for 5-10 times in an open mill to obtain master batch; Step 2, adding the carbon nano tube into the absolute ethyl alcohol weighed in proportion for 3 times according to the proportion, stirring while adding, and stirring for 30-60 min after adding to obtain a carbon nano tube-ethyl alcohol mixed solution; Step 3, placing the masterbatch obtained in the step 1 on an open mill for thin-pass, uniformly coating the weighed carbon nano tube-ethanol mixed solution obtained in the step 2 on the surface of the masterbatch, and coating once every 2-3 minutes until the carbon nano tube-ethanol mixed solution is completely coated, and carrying out thin-pass for 15-20 times; Step 4, the masterbatch obtained in the step 3 is formed into a thin film with the thickness of 1-1.5 mm, and the thin film is placed in a constant temperature oven for drying; step 5, mixing the dried thin film obtained in the step 4 with a heat-resistant agent and a processing aid on an open mill according to a proportion, and carrying out thin-pass for 5-8 times; Step 6, uniformly mixing the masterbatch obtained in the step 5 with a vulcanizing agent and a vulcanizing aid on an open mill according to a proportion, carrying out thin ventilation for 5-8 times, and discharging air for discharging tablets to obtain a rubber compound; And 7, carrying out mould pressing vulcanization on the mixed materials obtained in the step 6 at 170-180 ℃ for 10-20 min, and then carrying out constant temperature vulcanization in a constant temperature oven at 230 ℃ for 10 hours to obtain the fluororubber material.
  8. 8. The method for preparing a fluororubber material according to claim 7, wherein the roll gap is 0.7-1 mm and the roll temperature is 60-80 ℃ during the thin pass in the steps 1, 3, 5 and 6.
  9. 9. The method for preparing a fluororubber material according to claim 7, wherein the drying temperature in step 4 is 70-80 ℃ and the drying time is 4-6 hours.
  10. 10. Use of the fluororubber material according to any one of claims 1 to 6 in fluororubber seals for ultra-deep well logging devices.

Description

Fluororubber material and preparation method and application thereof Technical Field The invention belongs to the technical field of functional materials, relates to a rubber material, and in particular relates to a fluororubber material, a preparation method and application thereof. Background The rubber sealing ring for the well logging equipment is a key sealing element in the well logging equipment, and has the main functions of preventing underground high-temperature medium from leaking into the shell due to high pressure, damaging precise instruments in the shell and ensuring the normal operation of the well logging equipment and the accuracy of test data. With the development of the depth of an oil well to an ultra-deep well, the temperature and the pressure in the well are higher and higher, when the depth reaches below 8000 meters, the temperature is raised to be more than 200 ℃, the pressure is increased to be more than 180MPa, and in addition, the medium environments such as petroleum, slurry, hydrogen sulfide and the like in the well, the comprehensive properties such as high temperature resistance, high pressure resistance and corrosive medium and the like of the material for the sealing ring are extremely severely required. At present, domestic fluororubber sealing rings are mostly applied to logging equipment with the well depth less than or equal to 7000 m, the using temperature is 180 ℃ at most, and the pressure is 140MPa at most. For ultra-deep wells with depth exceeding 8000 meters, the sealing failure is caused by the problems of product fracture, large compression set and the like of the traditional domestic fluorine rubber sealing ring in the use process. The main reasons are that the fluororubber material used in domestic products has low strength retention rate at high temperature, large compression set at corresponding high temperature, short service life and the like. Therefore, the fluororubber sealing ring for the ultra-deep well logging device in China basically adopts imported products at present. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide a fluororubber material, a preparation method and application thereof, wherein the fluororubber material has high strength retention rate under high temperature condition, small compression set and excellent high temperature and high pressure resistance, and the prepared sealing ring can meet the requirements of 8000-10000 m ultra-deep well logging equipment on the sealing performance and service life of the sealing ring. The invention is realized by the following technical scheme: The fluororubber material comprises, by mass, 100 parts of fluororubber raw rubber, 25-35 parts of thermal cracking carbon black N990, 5-15 parts of fast extrusion carbon black N550, 3-6 parts of a heat resistant agent, 1.5-3 parts of a vulcanizing agent, 2.5-4 parts of a vulcanizing aid triallyl isocyanurate, 1-2 parts of a processing aid and 10-50 parts of a carbon nano tube-ethanol mixed solution. The invention also has the following technical characteristics: Preferably, the fluororubber raw rubber is fluororubber raw rubber or perfluoroether raw rubber with the fluorine content of more than or equal to 69 percent. Preferably, the heat-resistant agent comprises any one of calcium oxide, magnesium oxide and zinc oxide. Preferably, the vulcanizing agent comprises any one of 2, 5-dimethyl-2, 5-di-tert-butyl peroxyethane, dicumyl peroxide and di-tert-butyl peroxycumene. Preferably, the processing aid comprises one or more of WS280, palm wax, HT-290, and fluorowax. Preferably, the carbon nano tube-ethanol mixed solution is prepared by uniformly mixing absolute ethanol and multi-wall carbon nano tubes according to the mass ratio of (300-600) to (1-1.5). The invention also provides a preparation method of the fluororubber material, which comprises the following steps: step 1, adding weighed thermal cracking carbon black N990 and quick extrusion carbon black N550 in proportion into weighed fluororubber raw rubber, and carrying out thin pass through for 5-10 times in an open mill to obtain master batch; Step 2, adding the carbon nano tube into the absolute ethyl alcohol weighed in proportion for 3 times according to the proportion, stirring while adding, and stirring for 30-60 min after adding to obtain a carbon nano tube-ethyl alcohol mixed solution; Step 3, placing the masterbatch obtained in the step 1 on an open mill for thin-pass, uniformly coating the weighed carbon nano tube-ethanol mixed solution obtained in the step 2 on the surface of the masterbatch, and coating once every 2-3 minutes until the carbon nano tube-ethanol mixed solution is completely coated, and carrying out thin-pass for 15-20 times; Step 4, the masterbatch obtained in the step 3 is formed into a thin film with the thickness of 1-1.5 mm, and the thin film is placed in a constant temperature oven for drying; step 5, mixing the dried thin film ob