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Highly-oil-resistant rubber-hose inner-layer rubber material filled with low-molecular-weight PPC premix and preparation method thereof

A low-molecular-weight, premixed technology, applied in the field of rubber products, can solve the problems of high temperature resistance and oil resistance, which cannot meet the high performance requirements of rubber parts, inconvenient weighing and use, and expensive special rubber. Refining energy consumption, vulcanization efficiency is equivalent, and the effect of improving mechanics

Active Publication Date: 2018-08-31
常州苏橡橡塑制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For a long time, nitrile rubber has been the material of choice for oil-resistant rubber hoses for automobiles. However, due to the defects of nitrile rubber itself, its high temperature resistance and oil resistance properties are increasingly difficult to meet the high-performance requirements of the automotive industry for rubber parts; currently manufacturers use Special rubber and nitrile rubber are used together for modification, but special rubber is expensive and has poor processing performance, so only a small amount of special rubber and nitrile rubber can be used together to improve the aging resistance of the inner rubber of nitrile rubber oil-resistant hose. Media resistance and other properties; it is very important to seek other modification methods for nitrile rubber, while reducing costs and improving processing performance
[0004] PPC (polypropylene carbonate) is synthesized from carbon dioxide and propylene oxide, with a wide range of raw materials and low cost; PPC (polypropylene carbonate) can fix carbon dioxide in the atmosphere, alleviate environmental pollution, reduce the greenhouse effect, and realize carbon dioxide The comprehensive utilization of resources is a green and environmentally friendly material; at present, the high molecular weight PPC synthesized by domestic enterprises has been rapidly applied in biodegradable materials, and the low molecular weight PPC is a viscous liquid with poor thermal stability and inconvenient weighing and use. It has not been effectively used so far; therefore, it is of great significance to develop the application field of low molecular weight PPC, improve the aging resistance and medium resistance of oil-resistant hoses, prolong the service life of hoses, reduce environmental pollution, and reduce the greenhouse effect.

Method used

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  • Highly-oil-resistant rubber-hose inner-layer rubber material filled with low-molecular-weight PPC premix and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1—5

[0024] The premix of the low molecular weight PPC that embodiment 1-5 uses is all prepared by this method, and the preparation step of the premix of low molecular weight PPC is 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 p...

Embodiment 1

[0029] First adjust the roller distance of the double-roller mill to 0.1mm, add 80g of nitrile rubber Botong for 4 times, add 20g of hydrogenated nitrile rubber for plasticizing 3 times; adjust the roller distance to 0.5mm, add nitrile rubber and hydrogenated butadiene rubber Thin the nitrile rubber until the mixing is uniform; adjust the roller distance to 2.3mm, when the rubber material is wrapped around the roller and there is a small amount of accumulated rubber, add 4.5g zinc oxide, 1.7g stearic acid, 1.1g anti-aging agent BLE, 1.3g anti-aging 4010NA, until mixed evenly; then add 63g of carbon black N550, 8g of plasticizer DOS; 4.4g of low molecular weight PPC premix; Roll distance to 2.5mm, add 3g dicumyl peroxide (curing agent DCP) and 1.8g vulcanization aid TAIC in sequence, adjust the roller distance to 0.3mm when the material is completely eaten, and pack it 5 times; mixing temperature control At about 50°C, adjust the roller distance to 3.5 mm to thicken the lower s...

Embodiment 2

[0031] First adjust the roller distance of the double-roller mill to 0.1mm, add 80g of nitrile rubber Botong for 4 times, add 20g of hydrogenated nitrile rubber for plasticizing 4 times; adjust the roller distance to 0.5mm, add nitrile rubber and hydrogenated butadiene rubber Thin the nitrile rubber until the mixing is uniform; adjust the roller distance to 2.2mm, when the rubber material wraps the roller and has a small amount of accumulated rubber, add 4.5g zinc oxide, 1.4g stearic acid, 1.5g anti-aging agent BLE, 1.2g anti-aging Add agent 4010NA until it is evenly mixed; then add 60g of carbon black N550, 5g of plasticizer DOS; 11g of low molecular weight PPC premix; Gap to 2.5mm, add 2.5g dicumyl peroxide (curing agent DCP) and 2.2g vulcanization aid TAIC in turn, adjust the roller distance to 0.3mm when the material is completely eaten, and pack it 5 times; mixing temperature control At about 50°C, adjust the roller distance to 3.5 mm and thicken the lower sheet to prepar...

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Abstract

The invention discloses a highly-oil-resistant rubber-hose inner-layer rubber material filled with a low-molecular-weight PPC premix. The highly-oil-resistant rubber-hose inner-layer rubber material comprises the following components in parts by mass: 80 parts of nitrile rubber, 20 parts of hydrogenated nitrile rubber, 50 to 63 parts of carbon black, 0 to 10 parts of alkaline white carbon black, 2.5 to 3.5 parts of a vulcanizing agent, 1.8 to 2.2 parts of a vulcanization auxiliary agent, 3 to 5 parts of zinc oxide, 1 to 2 parts of stearic acid, 2 to 3 parts of an anti-aging agent system, 4.4 to 22 parts of the low-molecular-weight PPC premix and 0 to 8 parts of a plasticizer. According to the invention, low-molecular-weight PPC is prepared into a premix, so use is convenient; meanwhile, the alkaline white carbon black is adopted to partially replace a traditional reinforcing agent namely carbon black, so mechanical properties, aging resistance and oil resistance of oil-resistant rubberhose inner-layer rubber are improved; the service life of a rubber hose is prolonged; cost and energy consumption of mixing are reduced; application of the low-molecular-weight PPC alleviates environmental pollution; greenhouse effect is reduced; and important significance of comprehensive utilization of carbon dioxide resources is realized.

Description

technical field [0001] The invention belongs to the technical field of rubber products, and in particular relates to a rubber material for the inner layer of a high oil-resistant rubber hose filled with a low-molecular-weight PPC premix and a preparation method thereof. Background technique [0002] The oil-resistant rubber hose is one of the main parts of the car. Its main function is to transport oil. The oil-resistant rubber hose is composed of three parts: the inner layer rubber, the middle layer and the outer layer rubber. The inner layer rubber is the key part of the oil-resistant rubber hose. The inner layer rubber and the medium Direct contact, harsh service conditions, good compactness to prevent leakage, good adaptability to the conveying medium, thermal stability, etc. [0003] For a long time, nitrile rubber has been the material of choice for oil-resistant rubber hoses for automobiles. However, due to the defects of nitrile rubber itself, its high temperature re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L15/00C08L69/00C08K13/02C08K3/04C08K3/36C08K3/22C08K5/09C08K5/14C08G64/42
CPCC08G64/42C08K2003/2296C08L9/02C08L2201/08C08L2203/18C08L2205/03C08L15/005C08L69/00C08K13/02C08K3/04C08K3/36C08K3/22C08K5/09C08K5/14
Inventor 赵桂英王忠光徐云慧李培培李敬伟於舜尧刘浩魏虎
Owner 常州苏橡橡塑制品有限公司
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