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Sealing pad for engine of automobile and method for preparing sealing pad

A technology for automotive engines and gaskets, applied in the field of automotive sealing materials, can solve problems such as metal corrosion, swelling, and gasket sealing performance degradation, and achieve the effects of reducing swelling, good barrier properties, and excellent hardness

Inactive Publication Date: 2016-10-12
李英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The application number is 201510042913.4 "A Sealing Gasket for Automobile Engine" which discloses an engine sealing gasket, which mainly consists of acrylic rubber, fluororubber and hydrogenated butyl rubber, and has good compression and durability in oil. However, because acrylate rubber contains a large amount of ester groups, it is easy to swell in oxygen-containing fuels with polar groups, resulting in a decrease in the sealing performance of the gasket
In June 2006, the Journal of Heilongjiang Institute of Engineering, Vol. 20, No. 2, "Rubber Diaphragm Resistance to Ethanol Gasoline Test and Analysis of Fuel Pressure Regulator" disclosed a rubber membrane with nitrile rubber / chlorinated polyether as the main component. film formula, the rubber diaphragm using this formula has good resistance to ethanol gasoline, but the chlorinated polyether will decompose and produce hydrogen chloride gas during long-term use, which will corrode the metal

Method used

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  • Sealing pad for engine of automobile and method for preparing sealing pad

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preparation example Construction

[0034] A preparation method for an automobile engine gasket, comprising the steps of:

[0035] (a) adding the silane coupling agent to the glass microspheres, fully stirring to obtain surface-treated glass microspheres;

[0036] (b) adding the isoprene rubber and the treated glass beads to an internal mixer for banburying to obtain glass beads

[0037] Filled with isoprene rubber, the mixing process parameters are 110°C-130°C, 10min-14min;

[0038] (c) adding nitrile rubber, styrene-butadiene rubber, modified nano-montmorillonite, vulcanizing agent, tert-butylphenol formaldehyde resin and glass microsphere filled isoprene rubber into a banbury mixer to obtain a mixed adhesive The refining process parameters are 130°C-145°C, 10min-14min;

[0039] (d) adding the mixed rubber in step (c) to an open mill for mixing to obtain rubber sheets, and the roll temperature of the open mill is 40°C-50°C;

[0040] (e) Put the rubber sheet obtained in step (d) into a flat vulcanizer for vu...

Embodiment 1

[0050] A kind of automobile engine gasket of the present embodiment has the following components: 45 parts by weight of nitrile rubber, 22 parts by weight of isoprene rubber, 20 parts by weight of styrene-butadiene rubber, 4 parts by weight of hollow glass microspheres, modified 5 parts by weight of nano-montmorillonite, 3 parts by weight of vulcanizing agent dicumyl peroxide, 0.7 parts by weight of silane coupling agent KH550, and 0.3 parts by weight of tert-butylphenol formaldehyde resin.

[0051] A preparation method for an automobile engine gasket, comprising the steps of:

[0052] (a) adding the silane coupling agent to the glass microspheres, fully stirring to obtain surface-treated glass microspheres;

[0053] (b) adding isoprene rubber and treated glass microspheres into a banbury mixer for banburying to obtain isoprene rubber filled with glass microspheres, and the banburying process parameters are 110°C and 10min;

[0054] (c) adding nitrile rubber, styrene-butadien...

Embodiment 2

[0059] A kind of automobile engine gasket of the present embodiment has the following components: 58 parts by weight of nitrile rubber, 18 parts by weight of isoprene rubber, 17 parts by weight of styrene-butadiene rubber, 2 parts by weight of hollow glass microspheres, modified 3 parts by weight of nano-montmorillonite, 1 part by weight of vulcanizing agent dicumyl peroxide, 0.4 parts by weight of silane coupling agent KH550, and 0.6 parts by weight of tert-butylphenol formaldehyde resin.

[0060] A preparation method for an automobile engine gasket, comprising the steps of:

[0061] (a) adding the silane coupling agent to the glass microspheres, fully stirring to obtain surface-treated glass microspheres;

[0062] (b) adding isoprene rubber and treated glass microspheres to an internal mixer for banburying to obtain isoprene rubber filled with glass microspheres, and the banburying process parameters are 130°C and 14min;

[0063] (c) adding nitrile rubber, styrene-butadiene...

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Abstract

The invention provides a sealing pad for an engine of an automobile and a method for preparing the sealing pad. The sealing pad for the engine comprises, by weight, 45-58 parts of acrylonitrile-butadiene rubber, 18-22 parts of isoprene rubber, 17-20 parts of styrene butadiene rubber, 2-4 parts of hollow glass micro-beads, 3-5 parts of modified nanometer montmorillonite, 1-3 parts of vulcanizing agents, 0.4-0.7 part of silane coupling agents and 0.3-0.6 part of tert-phenol-formaldehyde resin. The sealing pad for the engine of the automobile and the method have the advantages that the sealing pad is excellent in hardness, permanent compression deformation and aging resistance in oxygen-containing fuel environments; the method is easy to implement, and industrial production can be facilitated.

Description

technical field [0001] The invention relates to an automobile sealing material, in particular to an automobile engine sealing gasket and a preparation method thereof. Background technique [0002] The field of vehicle fuels is facing increasingly severe pressure on energy security and environmental protection, so finding new alternative fuels has become a top priority. There are many substances that can be used as alternative fuels for engines, which can be generally divided into two categories: (1) oxygenated fuels (alcohol / ether / ester), mainly referring to methanol, ethanol, dimethyl ether and biodiesel; (2) ) gas fuel, mainly compressed natural gas, liquefied natural gas, liquefied petroleum gas, hydrogen and various types of coal gas. The chemical properties of these new fuels are different from traditional fuels, so commonly used rubber seal materials cannot adapt to the new working conditions. [0003] Commonly used engine gaskets are mainly made of nitrile rubber, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L9/00C08L9/06C08L61/06C08K13/06C08K9/06C08K7/28C08K9/04C08K3/34B29C35/02
CPCC08L9/02B29C35/02C08K2201/003C08K2201/011C08L2205/02C08L2205/035C08L9/00C08L9/06C08L61/06C08K13/06C08K9/06C08K7/28C08K9/04C08K3/346
Inventor 李英
Owner 李英
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