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Modified composition of corrosion-resistant sealing ring and preparation method thereof

A sealing ring and corrosion-resistant technology, which is applied in the field of modified compositions for corrosion-resistant sealing rings and its preparation, can solve the problems that the corrosion resistance of seals is difficult to meet the above requirements, and the sealing rings are difficult to satisfy acid resistance or alkali resistance at the same time, etc. To achieve the effect of simple process, improved corrosion resistance and easy availability of raw materials

Active Publication Date: 2020-06-12
沸点密封科技(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, seals can be divided into NBR nitrile rubber seal rings, HNBR hydrogenated nitrile rubber seal rings, FLS fluorosilicone rubber seal rings, CR neoprene rubber seal rings, etc., although the above seals can basically meet production needs. , but in some specific environments, it is difficult for the corrosion resistance of the seal to meet the above requirements. For example, it is difficult for the above seal ring to meet the requirements of acid resistance or alkali resistance at the same time.

Method used

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Examples

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preparation example Construction

[0013] The invention provides a method for preparing a modified composition of a corrosion-resistant sealing ring, the preparation method comprising:

[0014] 1) Contact reaction of carbon fiber, cyclodextrin, silane coupling agent and water, and then filter and dry the filter cake to obtain modified carbon fiber;

[0015] 2) Perform hydrothermal reaction of modified carbon fiber, silver salt, zinc salt, urea and water, then filter to take filter cake, and finally calcine in the presence of protective gas to obtain composite carbon fiber;

[0016] 3) Mix composite carbon fibers, shell powder, attapulgite, silicon carbide, and rare earth oxides to prepare a modified composition for corrosion-resistant sealing rings.

[0017] In step 1) of the present invention, the amount of each material can be selected within a wide range, but in order to make the modified composition further improve the corrosion resistance of the sealing ring, preferably, in step 1), carbon fiber, The weig...

Embodiment 1

[0031] 1) Contact reaction of carbon fiber, cyclodextrin, silane coupling agent (vinyltriethoxysilane) and water in a weight ratio of 30:13:8:100 (reaction temperature is 70°C, reaction time is 4h) , and then filtered to take the filter cake and dry it (drying temperature is 110°C, drying time is 5h) to obtain modified carbon fiber;

[0032] 2) The modified carbon fiber, silver salt (silver nitrate), zinc salt (zinc nitrate), urea and water are subjected to hydrothermal reaction according to the weight ratio of 50:7:13:18:280 (reaction temperature is 170°C, The reaction time is 12h), then filter to take the filter cake, and finally calcine in the presence of protective gas (helium) (from 20°C at 4.8°C / min to 380°C and keep it for 40min, then at 1.8°C / min to cool down to 260°C and heat preservation for 1.8h, and finally naturally cooled to 18°C) to obtain composite carbon fibers;

[0033] 3) Mix composite carbon fiber, shell powder, attapulgite, silicon carbide, and rare earth...

Embodiment 2

[0035] 1) Contact reaction of carbon fiber, cyclodextrin, silane coupling agent (vinyltrimethoxysilane) and water according to the weight ratio of 30:10:5:80 (reaction temperature is 65°C, reaction time is 5h), Then filter the filter cake and dry it (drying temperature is 100°C, drying time is 6h) to obtain modified carbon fiber;

[0036] 2) The modified carbon fiber, silver salt (silver nitrate), zinc salt (zinc chloride), urea and water are subjected to hydrothermal reaction according to the weight ratio of 50:5:10:15:200 (the reaction temperature is 160°C , the reaction time is 16h), then filter to take the filter cake, and finally calcine in the presence of protective gas (nitrogen) (from 15°C at 4.5°C / min to 350°C and keep it for 30min, then at 1.5°C / min to cool down to 200°C and heat preservation for 1.5h, and finally naturally cooled to 15°C) to obtain composite carbon fibers;

[0037] 3) Mix composite carbon fiber, shell powder, attapulgite, silicon carbide, and rare ...

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PUM

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Abstract

The invention provides modified composition of a corrosion-resistant sealing ring and a preparation method of the modified composition. The preparation method comprises steps as follows: 1), carbon fibers, cyclodextrin, a silane coupling agent and water are subjected to contact reaction, filtering is performed, a filter cake is taken and dried, and modified carbon fibers are prepared; 2), the modified carbon fibers, silver salt, zinc salt, urea and water are subjected to hydrothermal reaction, filtering is performed, a filter cake is taken and calcined in the presence of shielding gas, and composite carbon fibers are prepared; 3), the composite carbon fibers, shell powder, attapulgite, silicon carbide and rare earth oxide are mixed, and the modified composition of the corrosion-resistant sealing ring is prepared. The modified composition prepared with the method can improve acid resistance and alkali resistance of the sealing ring to the great extent.

Description

technical field [0001] The invention relates to a sealing ring, in particular to a modified composition for a corrosion-resistant sealing ring and a preparation method thereof. Background technique [0002] The seal is generally composed of a moving ring, a static ring and a sealing ring; the sealing ring plays a vital role in the sealing effect of the seal. The sealing ring generally meets the following conditions: high elasticity and resilience; appropriate mechanical strength, including expansion strength, elongation and tear strength, etc.; stable, not easy to swell in the medium, and small thermal shrinkage effect (Joule effect) ; Easy to process and shape, and can maintain precise dimensions; no corrosion of the contact surface, no pollution of the medium, etc. [0003] At present, seals can be divided into NBR nitrile rubber seal rings, HNBR hydrogenated nitrile rubber seal rings, FLS fluorosilicone rubber seal rings, CR neoprene rubber seal rings, etc., although the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K13/06C08K9/04C08K9/06C08K7/06C08K3/26C08K3/34C08K3/22C08L9/06C08L23/16C08L27/12
CPCC08K3/22C08K3/26C08K3/34C08K3/346C08K7/06C08K9/06C08K9/08C08K13/06C08K2003/221C08K2003/265C08L9/06C08L2205/03C08L23/16C08L27/12
Inventor 李春生周强明
Owner 沸点密封科技(江苏)有限公司