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Rubber composition used for automobile cooling pipe and preparation method thereof

A rubber composition and automobile cooling technology, applied in the field of chemical materials, can solve problems such as easy adhesion and deformation of tube blanks, poor tearing performance, and missing pieces of tube blanks, so as to improve extrusion process performance and high temperature tearing performance, extrusion Process and high-temperature tearability improvement, material cost reduction effect

Active Publication Date: 2018-03-09
QINGDAO SUNSONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of AEM rubber is high, the high temperature viscosity is low, and it is easy to stick to the inner wall of the extruder for a long time during the extrusion process, resulting in extruded cooked rubber. At the same time, the extruded tube has poor stiffness, and the tube is easy to stick and deform during weaving The defect of missing blocks in the tube blank
In addition, AEM rubber has a disadvantage, which is low strength at high temperature and poor tearability. The product is easy to tear at high temperature. When used in automotive oil cooling pipes, it is prone to high temperature blasting failure.

Method used

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  • Rubber composition used for automobile cooling pipe and preparation method thereof
  • Rubber composition used for automobile cooling pipe and preparation method thereof
  • Rubber composition used for automobile cooling pipe and preparation method thereof

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preparation example Construction

[0030] The present invention also provides a kind of preparation method of rubber composition, comprises the steps:

[0031] (1) Put chlorinated polyethylene rubber, ethylene acrylate rubber, anti-tearing agent, heat stabilizer, anti-aging agent, and 1 / 2 carbon black into the internal mixer for pressurized mixing. When the temperature reaches 115-120 At ℃, discharge the mixed rubber materials to the open mill for upper and lower sheets, and park for 16-24 hours before use.

[0032] Anti-tearing agent, heat stabilizer, and anti-aging agent are used in small amounts in the formula and are difficult to disperse. As the most critical raw materials in the formula, they need to be mixed with rubber and carbon black in advance. The longer the mixing time, the better the dispersion. However, during the mixing process, the rubber mixture will heat up due to shear friction. When the temperature exceeds 120°C, the viscosity of ethylene acrylate rubber will drop too much, and the shear f...

Embodiment 1-5

[0039] Embodiment 1-5 rubber composition is prepared according to the following processing methods:

[0040] (1) Put chlorinated polyethylene rubber, ethylene acrylate rubber, cerium oxide, lithium carbonate, aramid short fiber, carbon fiber micropowder, antioxidant MC, carbon black N990 into the internal mixer for pressurized mixing, when the temperature reaches When the temperature is 115-120 ℃, discharge the mixed rubber material to the upper and lower sheets of the open mill, and park it for 16-24 hours before use;

[0041] (2) Put the chlorinated polyethylene rubber / ethylene acrylate rubber mixture, SRP66, N660 carbon black, and plasticizer RS-735 in step 1 into the internal mixer for mixing, and add crosslinking aid when the temperature rises to 90°C Agent HAV-2 and peroxide cross-linking agent Perkadox 14-40B continue to mix, when the temperature reaches 105-110°C, discharge the mixed rubber to the open mill for 2-3 minutes, and then On the tablet press, it is pressed ...

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Abstract

The invention relates to a rubber composition used for an automobile cooling pipe. The rubber composition comprises the following components in parts by weight: 10 to 30 parts of chlorinated polyethylene rubber, 70 to 90 parts of ethylene acrylate rubber, 5 to 10 parts of a heat stabilizer, 2 parts of an anti-aging agent, 12 parts of a plasticizer, 5 to 10 parts of a heat resistant agent, 2 to 8 parts of a tear resistant agent, 100 to 120 parts of carbon black, 6 to 9 parts of a peroxide crosslinking agent, 2 parts of an auxiliary crosslinking agent and 1 part of an internal releasing agent. According to the invention, AEM rubber is used as a main material and combines with CM rubber, and through advantage complementation of different rubber performances and optimization of a filling system, a composition combining the ethylene acrylate rubber with the chlorinated polyethylene rubber is manufactured, so the Mooney viscosity of the AEM rubber is enhanced, and the extrusion process performance and the high-temperature tear resistance of AEM are improved; and the heat stabilizer, the heat resistant agent, the reactive extraction-resistant anti-aging agent MC and the tear resistant agent are added, so the composition is endowed with temperature resistance as same as the AEM rubber, while the extrusion process performance and the high-temperature tear resistance are improved, and the material cost is reduced.

Description

technical field [0001] The invention relates to the technical field of chemical materials, in particular to a rubber composition used for automobile cooling pipes and a preparation method of the rubber composition. Background technique [0002] Rubber hoses for automotive gearboxes and engine oil coolers have high operating temperatures, and their materials generally use a single chlorinated polyethylene rubber (CM rubber) or a single ethylene acrylate rubber (AEM rubber). CM rubber, very cheap, has excellent weather resistance, ozone resistance, chemical resistance and aging resistance, good oil resistance, flame retardancy and coloring performance, and has good compatibility with other polymer materials. It can be used normally at -40°C to 150°C, but its resistance to fully synthetic and semi-synthetic lubricating oil is not good, and its service life is short when used in oil cooling pipes. AEM rubber has excellent long-term high temperature resistance, and has good oil ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/28C08L77/10C08K13/04C08K7/06C08K3/26C08K3/22C08K3/04C08K5/14C08K5/3415
CPCC08K2003/2213C08K2003/262C08K2201/014C08L23/0869C08L2201/08C08L2203/18C08L2205/03C08L2205/16C08L2312/00C08L23/286C08L77/10C08K13/04C08K7/06C08K3/26C08K3/22C08K3/04C08K5/14C08K5/3415
Inventor 聂军黄英汤宝光刘松涛李斌
Owner QINGDAO SUNSONG CO LTD
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