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A light-colored oil-resistant sealing ring compound and its preparation method

An oil-resistant sealing ring and rubber material technology, applied in the field of rubber products, can solve the problems of polluting the environment, easy to float, small particle size, etc., and achieve the effects of low cost, low compression set, and improved aging resistance.

Active Publication Date: 2021-01-15
XUZHOU COLLEGE OF INDAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Carbon black is a commonly used reinforcing agent for oil-resistant sealing rings. Its reinforcing effect is obviously better than that of white fillers, but its particle size is small and it is easy to float. It consumes a lot of energy during mixing and pollutes the environment.

Method used

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  • A light-colored oil-resistant sealing ring compound and its preparation method

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Experimental program
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Effect test

Embodiment 1—3

[0024] The premix of the low molecular weight PPC that embodiment 1-3 uses is all prepared by this method, and the preparation steps of the premix of low molecular weight PPC are as follows:

[0025] The low molecular weight PPC for premixing in the present invention is provided by Jiangsu Zhongke Jinlong Chemical Co., Ltd. Specifically, it is the product of the reaction between carbon dioxide and propylene oxide produced in the company's cassava fermentation process to produce alcohol. It is a low-molecular-weight PPC with a number-average molecular weight between 2000 and 4500, and its appearance is a white transparent viscous liquid.

[0026] Preparation of low-molecular-weight PPC premix: Step 1) Heat low-molecular-weight PPC to 65±1°C, then add maleic anhydride (MA) and mix and stir for 1 hour to make maleic anhydride (MA) in PPC Completely dissolved in the medium, the mass ratio is PPC:maleic anhydride=10:2, to prepare modified PPC;

[0027] Step 2) Add the modified PPC...

Embodiment 1

[0029] First adjust the roll distance of the double-roll mill to 0.1mm, add 80g of nitrile rubber thin pass 4 times, adjust the roll distance to 0.5mm, add 20g acrylate rubber thin pass until the mixing is uniform; adjust the roll distance to 2.3mm, when When the rubber material is wrapped with a small amount of rubber accumulation, add 5g zinc oxide, 1.7g stearic acid, 1g anti-aging agent BLE, 1g anti-aging agent 4010NA, and mix well; then add 10g basic white carbon black, 25g precipitation method White carbon black, 1g silane coupling agent KH-560, 0.8g PEG-4000, 6.7g plasticizer DOS; 14g low molecular weight PPC premix; adjust the roller distance to 0.5mm when the material is completely eaten, and pack 4 Then adjust the roller distance to 2.5mm, add 1g of vulcanizing agent TCY, 3g of acid absorbing agent, 5g of calcium carbonate, 2g of accelerator DTDM, 1.5g of accelerator CZ, 1.5g of accelerator TMTD, and adjust the roller until the material is completely fed. Gap to 0.3mm...

Embodiment 2

[0031] First adjust the roller distance of the double-roll mill to 0.1mm, add 80g of nitrile rubber thin pass 4 times, add 20g of acrylic ester rubber thin pass until the mixing is uniform; When accumulating glue, add 4g zinc oxide, 1.5g stearic acid, 1.25g anti-aging agent BLE, 1.25g anti-aging agent 4010NA, and mix well; then add 10g basic white carbon black, 13g precipitated white carbon black, 1g Silane coupling agent KH-560, 0.8g PEG-4000, 3.3g plasticizer DOS; 28g low molecular weight PPC premix; when the material is completely fed, adjust the roller distance to 0.5mm, pack 5 times with thin pass; then adjust the roller When the distance reaches 2.4mm, add 1.1g vulcanizing agent TCY, 3g acid absorbing agent, 5g calcium carbonate, 2g accelerator DTDM, 1.5g accelerator CZ, 1.5g accelerator TMTD, and adjust the roller distance to 0.3mm when the material is completely fed. , Thin pass packs 4 times; the mixing temperature is controlled at about 50 ℃, the roller distance is a...

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Abstract

The invention discloses a light-color oil-resistant sealing ring rubber material, which is prepared from the following ingredients in parts by mass: 80 parts of nitrile rubber, 20 parts of acrylate rubber, 0 to 25 parts of precipitated white carbon black, 10 parts of basic white carbon black, 1.0 to 1.2 parts of vulcanizing agents TCY, 3 parts of acid acceptors, 5 parts of calcium carbonate, 2 parts of accelerants DTDM, 1.5 parts of accelerants CZ, 1.5 parts of accelerants TMTD, 1 part of KH-560, 0.8 part of PEG-4000, 3 to 5 parts of zinc oxide, 1.5 to 2 parts of stearic acid, 2 to 3 parts ofanti-aging agent system, 14 to 42 parts of low molecular weight PPC pre-mixed compounds and 0 to 6.7 parts of DOS. Boehmite and low molecular weight PPC are made into pre-mixed compounds; the medium resistance and pressure change performance of the light-color oil-resistant sealing ring rubber material are improved; the service life of the sealing ring is prolonged; meanwhile, the cost is reduced;the mixing process is improved; the application field of the low molecular weight PPC is expanded; the comprehensive utilization of resources is realized.

Description

technical field [0001] The invention belongs to the technical field of rubber products, and in particular relates to a light-colored rubber material for oil-resistant sealing rings and a preparation method thereof. Background technique [0002] The oil-resistant sealing ring is one of the main parts of the car, which is used to prevent the liquid medium (such as various oil products) inside the car from leaking out and to isolate foreign substances from entering; the rubber compound should have certain mechanical strength, aging resistance and medium resistance Good, and at the same time, it should have the advantages of excellent resilience, small compression set, good sealing performance, and easy processing and molding. [0003] Nitrile-butadiene rubber is a commonly used oil-resistant rubber and is the main material for manufacturing sealing rings. It is widely used because of its low price and good processing performance; The industry requires high-performance rubber p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/02C08L33/04C08L71/02C08L69/00C08K13/02C08K3/36C08K3/26C08K5/40C08K5/5435C08K3/22C08K5/09
CPCC08K2003/222C08K2003/2227C08K2003/2296C08K2003/265C08L9/02C08L2201/08C08L2205/035C08L33/04C08L71/02C08L69/00C08K13/02C08K3/36C08K3/26C08K5/40C08K5/5435C08K3/22C08K5/09
Inventor 赵桂英王忠光杨昭徐彦红张小萍周奔王恒
Owner XUZHOU COLLEGE OF INDAL TECH
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