Unlock instant, AI-driven research and patent intelligence for your innovation.

Oil-resistant moving-ring sealing ring and preparation method thereof

A technology of sealing ring and static ring, which is applied in the field of oil-resistant static ring sealing ring and its preparation, can solve problems such as the reduction of rubber strength and other mechanical properties.

Inactive Publication Date: 2018-12-18
WUHU QIANKAI MATERIAL TECH CO LTD
View PDF0 Cites 0 Cited by
  • 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. However, if the rubber product is in contact with the oil medium for a long time during use, the oil can penetrate into the inside of the rubber to cause swelling, because after the oil penetrates into the rubber, the molecules diffuse each other, which changes the network structure of the vulcanized rubber , causing the strength and other mechanical properties of the rubber to decrease

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] The invention provides a method for preparing an oil-resistant static ring seal ring, comprising:

[0014] 1) Calcining the vermiculite to obtain expanded vermiculite, then soaking the expanded vermiculite in mixed acid, and then washing to obtain modified expanded vermiculite;

[0015] 2) Perform solvothermal reaction of modified expanded vermiculite, ethylene glycol, glycerin, parabens, and sulfuric acid, and then filter the filter cake to obtain oil resistance additives;

[0016] 3) Mix fluorine rubber, EPDM rubber, benzoyl peroxide, zinc dimethacrylate and tetramethylthiuram disulfide for the first time, then add white carbon black, sulfur, nitrile rubber, decane Dioctyl dioic acid and oil-resistant additives are mixed twice, and finally molded to obtain an oil-resistant static ring seal; wherein, the mixed acid is composed of hydrochloric acid solution and hydrocyanic acid solution.

[0017] In step 1) of the present invention, the specific conditions of calcinati...

Embodiment 1

[0028] 1) Calcinate the vermiculite (calcine from 230°C for 1.5h, then raise the temperature to 650°C at a rate of 3.5°C / h and keep it for 1.5h, then raise the temperature to 1050°C at a rate of 1.5°C / h and keep it for 3h, and finally natural cooling) to obtain expanded vermiculite, then expand the vermiculite in mixed acid (the weight ratio of hydrochloric acid solution and hydrogen cyanide solution is 1:0.2, and the concentration of hydrochloric acid solution is 20% by weight, and the concentration of hydrogen cyanide solution is 9% by weight %; the weight ratio of expanded vermiculite and mixed acid is 1:3) for soaking (soaking temperature is 40°C, soaking time is 10h), and then cleaned to obtain modified expanded vermiculite;

[0029] 2) Solvothermal reaction of modified expanded vermiculite, ethylene glycol, glycerin, paraben, and sulfuric acid in a weight ratio of 50:20:30:35:6 (reaction temperature is 150°C, reaction The time is 8h), and then filter the filter cake to o...

Embodiment 2

[0032] 1) Calcinate the vermiculite (calcine from 200°C for 1 hour, then raise the temperature to 600°C at a rate of 3°C / h and hold it for 1 hour, then raise the temperature to 1000°C at a rate of 1°C / h and hold it for 2 hours, and finally cool it naturally ) to obtain expanded vermiculite, then mix expanded vermiculite with mixed acid (the weight ratio of hydrochloric acid solution and hydrocyanic acid solution is 1:0.1, and the concentration of hydrochloric acid solution is 15% by weight, and the concentration of hydrocyanic acid solution is 8% by weight; The weight ratio of expanded vermiculite and mixed acid is 1:2) for soaking (soaking temperature is 35°C, soaking time is 8h), and then cleaned to obtain modified expanded vermiculite;

[0033] 2) Perform solvothermal reaction of modified expanded vermiculite, ethylene glycol, glycerin, paraben, and sulfuric acid in a weight ratio of 50:15:25:30:4 (reaction temperature is 140°C, reaction The time is 6h), and then filter the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an oil-resistant static-ring sealing ring and a preparation method thereof. The preparation method comprises the following steps: 1) calcining vermiculite to obtain expanded vermiculite, then immersing the expanded vermiculite in a mixed acid, and then washing the expanded vermiculite to obtain modified expanded vermiculite; 2) performing solvothermal reaction on the modified expanded vermiculite, ethylene glycol, glycerol, paraben and sulfuric acid, and then filtering filter cake to obtain an oil-resistant additive; 3) performing initial mixing on fluororubber, EPDM rubber, benzoyl peroxide, zinc dimethacrylate and tetramethyl thiuram disulfide, then adding white carbon, sulfur, nitrile rubber, dioctyl sebacate and the oil-resistant additive for secondary mixing, and finally forming to obtain the oil-resistant static-ring sealing ring; wherein the mixed acid is composed of a hydrochloric acid solution and a hydrocyanic acid solution. A static ring of a sealingmember has oil resistance, the process is simple, and raw materials are easily available.

Description

technical field [0001] The invention relates to a sealing element, in particular to an oil-resistant stationary ring 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 above seal...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/12C08L23/16C08L9/02C08K13/06C08K9/02C08K9/04C08K7/26C08K5/14C08K5/40C09K3/10
CPCC08L27/12C08L2205/03C09K3/10C08L23/16C08L9/02C08K13/06C08K9/02C08K9/04C08K7/26C08K5/14C08K5/40
Inventor 彭涛其他发明人请求不公开姓名
Owner WUHU QIANKAI MATERIAL TECH CO LTD