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Rubber compound, rubber product, hydraulic rubber hose and preparation method of hydraulic rubber hose

A technology of rubber composition and rubber hose, which is applied in the direction of hoses, pipes, mechanical equipment, etc., can solve the problems of low oil resistance and temperature resistance, limited use, and performance degradation of the inner liner, and achieve excellent oil resistance and temperature resistance. Effect of extending service life, improving aging resistance and liquid resistance

Active Publication Date: 2017-07-28
XIANYANG KELONG SPECIAL RUBBER PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The inner liner of the traditional steel wire wound hydraulic hose is mainly nitrile rubber, and its problems are as follows: the long-term oil resistance of nitrile rubber is at 100 ℃, and the intermittent application is at 120 ℃, which cannot meet the current situation of long-term use of construction machinery at 135-150 ℃ Require
Working in the environment of 135-150 ℃ for a long time, the service life of the steel wire wound hydraulic hose will be reduced quickly, which limits the development of the construction machinery industry
[0006] Since nitrile rubber is used as the main material of the lining rubber, it cannot meet the continuous improvement of the oil resistance and temperature resistance of the current construction machinery products for the steel wire wound hydraulic hose, which seriously affects the development of the construction machinery industry.
[0007] The traditional technology uses 28-33% acrylonitrile of nitrile rubber, which is beneficial to the assembly of steel wire wound hydraulic hose, and has good pulse resistance, but low oil resistance and temperature resistance; while the acrylonitrile of nitrile rubber is 40-45%. %, can improve the oil resistance and temperature resistance of the steel wire wound hydraulic hose, but due to the compression deformation, the quality of the assembly will be affected, and the crimping effect of the assembly will be reduced
[0008] The aging resistance and liquid resistance of the inner lining layer are not high. During the use of the rubber hose, it is subjected to the aging, swelling and extraction of high-temperature fluid, which will reduce the performance of the inner lining layer, thereby greatly reducing the service life of the hose.
[0009] If hydrogenated nitrile rubber is used as the main material for the inner lining of steel wire wound hydraulic hose, due to the high Mooney viscosity of hydrogenated nitrile rubber, it will generate a lot of heat during processing. When using traditional N550 and N660 carbon black, it will cause mixing The rubber is easy to scorch during extrusion, which seriously affects the adhesion between the rubber and the copper-plated steel wire
In addition, the physical properties of the rubber fluctuate greatly, which cannot meet the high pulse performance of the steel wire wound hydraulic hose
[0010] Due to the problems in the bonding and mixing processing of hydrogenated nitrile rubber and copper-plated steel wire, there is currently no improvement in the bonding and mixing process of hydrogenated nitrile rubber with copper-plated steel wire based on the performance advantages of hydrogenated nitrile rubber, which limits its use under high pressure. Use on hydraulic hose

Method used

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  • Rubber compound, rubber product, hydraulic rubber hose and preparation method of hydraulic rubber hose
  • Rubber compound, rubber product, hydraulic rubber hose and preparation method of hydraulic rubber hose
  • Rubber compound, rubber product, hydraulic rubber hose and preparation method of hydraulic rubber hose

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preparation example Construction

[0079] There are three main preparation methods of HNBR: ethylene-acrylonitrile copolymerization method, NBR solution hydrogenation method and NBR emulsion hydrogenation method.

[0080] Hydrogenated nitrile rubber is commercially available.

[0081] (II) Compounding agent

[0082] (1) Thermal carbon black

[0083] Thermal cracking carbon black is generated by heating natural gas to high temperature (such as 1300 ° C) in isolation of air. It is composed of a large number of spherical, elliptical carbon and a small amount of welded particles. It has large particle size, small specific surface area, low structure, easy to disperse and flow. Good performance, high filling capacity and so on. Because of its low surface activity, it is also called non-reinforcing carbon black. It is one of the more widely used carbon black varieties in tire inner liner, rubber hose, tape, oil seal and fluorine rubber products.

[0084] According to one embodiment, the thermal carbon black is sel...

Embodiment approach

[0168] The invention also relates to a preparation method of the hydraulic rubber hose. According to one embodiment, the hydraulic hose preparation method includes the following steps:

[0169] (a) use the rubber compound of the present invention to extrude the inner rubber layer;

[0170] (b) preparing the cover layer, reinforcement layer, and cover layer; and

[0171] (c) Vulcanization.

[0172] According to one embodiment, the preparation method of the hydraulic hose comprises: extruding the inner rubber layer (inner lining layer) by using the compounded rubber of the present invention, passing through the reinforcement layer (preferably wound steel wire reinforcement layer), extruding the outer covering layer, covering and shaping, Vulcanized to manufacture hydraulic hoses (especially wire wound hydraulic hoses).

[0173] The present invention also relates to a hydraulic hose prepared by using the rubber compound of the present invention as an inner rubber layer (inner ...

Embodiment

[0184] 1. Compounding components and dosage (unit: parts by mass)

[0185] 1. Raw materials

[0186] Table 1 Raw materials

[0187] serial number raw material Raw material supplier 1 Hydrogenated nitrile raw rubber LANXESS 2 Nitrile rubber 6280 Korea LG 3 Zinc oxide Shijiazhuang Longhao Chemical Group Co., Ltd. 4 Stearic acid Rugao Shuangma Chemical Co., Ltd. 5 Anti-aging agent 445 Jiangsu Haian Petrochemical Plant 6 Anti-aging agent MB Jiangsu Haian Petrochemical Plant 7 Carbon Black N990 Tianjin Jinqiushi Chemical Co., Ltd. 8 Carbon Black N550 Cabot 9 Liquid nitrile rubber (softener) Lanzhou Petrochemical 10 Accelerator DM Hebei Yanbang Chemical Technology Co., Ltd. 11 vulcanizing agent sulfur Linyi Gold Sulfon Chemical Co., Ltd. 12 Auxiliary vulcanizing agent HVA-2 Taizhou Huangyan Donghai Chemical Co., Ltd. 13 Vulcanizing agent DCP Sinopec

[0188] 2. R...

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Abstract

The invention relates to a rubber compound, a rubber product, a hydraulic rubber hose and a preparation method of the hydraulic rubber hose. The rubber compound comprises (i) hydrogenated butadiene-acrylonitrile rubber, (ii) thermal cracking carbon black and (iii) other selectable matching agents. A rubber material prepared by the rubber compound has excellent oil resistance and temperature resistance.

Description

technical field [0001] The invention belongs to the technical field of rubber products, and in particular relates to a rubber composition, a rubber product, a hydraulic hose and a preparation method thereof. Background technique [0002] Hydraulic rubber hose is also known as hydraulic oil pipe, hydraulic hose, high-pressure hose, and hydraulic pipe. The hydraulic hose structure is mainly composed of a liquid-resistant synthetic rubber inner rubber layer, a middle rubber layer, a multi-layer reinforcement layer, and a weather-resistant synthetic rubber outer rubber layer. The inner rubber layer has the function of making the conveying medium bear the pressure and protecting the steel wire or wire fiber from erosion. The outer rubber layer protects the reinforcing layer from damage. . [0003] Hydraulic hoses are divided into steel wire braided hoses, steel wire wound hoses, wire braided hoses and cloth-covered hoses according to the production process. Steel wire hydrauli...

Claims

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Application Information

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IPC IPC(8): C08L15/00C08L9/02C08K13/02C08K3/04C08K3/22C08K5/12F16L11/00B29B7/74
CPCB29B7/7461C08K2003/2296C08K2201/014C08L15/005C08L2201/08C08L2205/025C08L2205/03F16L11/00C08L9/02C08K13/02C08K3/04C08K3/22C08K5/12
Inventor 刘日生高熠杨少静毛闵龙
Owner XIANYANG KELONG SPECIAL RUBBER PROD
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