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A kind of silicone rubber/polyurethane rubber composite hydraulic sealing gasket and preparation method thereof

A technology of polyurethane rubber and hydraulic sealing, which is applied in the field of silicone rubber/polyurethane rubber composite hydraulic sealing gasket and its preparation, which can solve the problems of hydraulic devices not working properly, gasket deterioration, aging and cracking, etc., so as not to expand easily and improve sealing Performance, the effect of improving mechanical strength

Active Publication Date: 2016-04-13
WUHU YINHONG HYDRAULIC COMPONENTS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sealing effect, compression resilience and mechanical strength of the existing hydraulic gaskets are far from meeting the actual requirements, and the gaskets are prone to deterioration, expansion, aging cracks, oil leakage, etc., resulting in the failure of the hydraulic device to work normally.

Method used

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  • A kind of silicone rubber/polyurethane rubber composite hydraulic sealing gasket and preparation method thereof

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Effect test

Embodiment Construction

[0013] A silicone rubber / polyurethane rubber composite hydraulic gasket made of the following raw materials by weight (kg): methyl vinyl silicone rubber (110-2) 75, polyether polyurethane rubber (UR101) 25, 2,5- Dimethyl-2,5-di-tert-butylperoxyhexane 1.5, diphenylsilanediol 3, hexamethyldisilazane 6, fumed silica 26, modified wollastonite 12, antioxidant ODA1, antioxidant TPPD3, stearic acid 2, zinc oxide 1.5, antimony trioxide 10, antioxidant MMB1.5, antioxidant DNP1, mineral oil 3, coumarone resin 4;

[0014] The preparation method of described modified wollastonite is as follows:

[0015] a. Take the dried wollastonite and crush it to less than 15 μm, put it into a dispersion kettle, add deionized water three times the amount of wollastonite, add 2% sodium polyacrylate, 1.5% tricalcium phosphate, 2 % of cocoic acid monoethanolamide, 1.5% of rice husk ash, 3% of organic bentonite, 3000rpm high-speed dispersion for 20min, ground into a slurry by a sand mill, and set aside; ...

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Abstract

The invention relates to a silicon rubber / polyurethane rubber composite hydraulic sealing gasket and a preparation method thereof. The silicon rubber / polyurethane rubber composite hydraulic sealing gasket is prepared from methylvinylsiloxane rubber, polyether based polyurethane rubber, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, diphenyl silanediol, hexamethyldisilazane, gas-phase white carbon black, modified wollastonite and the like. The methylvinylsiloxane rubber, which has the advantages of excellent heat resistance, excellent freezing resistance, excellent ozone resistance, excellent atmospheric aging resistance and small permanent compression set, and the polyurethane rubber with favorable mechanical properties are compounded and blended, so that the respective advantages are displayed, thereby enhancing the sealing property of the sealing material; and in the blending process, the organically / inorganically modified wollastonite is added to obviously improve the dispersity of the wollastonite in the rubber, thereby enhancing the mechanical strength, oil resistance, wear resistance, high temperature resistance and other properties of the sealing material.

Description

technical field [0001] The invention relates to a sealing gasket and a preparation method thereof, in particular to a silicone rubber / polyurethane rubber composite hydraulic sealing gasket and a preparation method thereof. Background technique [0002] With the rapid development of modern hydraulic transmission technology, the sealing problem of hydraulic devices is becoming more and more prominent. The sealing effect, compression resilience, and mechanical strength of the existing hydraulic gaskets are far from meeting the actual requirements, and the gaskets are prone to deterioration, expansion, aging cracks, oil leakage, etc., resulting in the failure of the hydraulic device to work normally. Contents of the invention [0003] The purpose of the present invention is to address the deficiencies of the prior art, to provide a silicone rubber / polyurethane rubber composite hydraulic gasket with small compression set, high mechanical strength, and aging resistance and a pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L75/08C08K13/06C08K9/04C08K9/02C08K3/34C08K5/14C08K5/5419C08K5/5445C08K3/36C08K5/09C08K3/22B29C35/02
Inventor 张开会陶庭鸿张火生
Owner WUHU YINHONG HYDRAULIC COMPONENTS
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