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Modified polyurethane elastomer, and preparation method and application thereof

A polyurethane elastomer, modified technology, applied in the direction of mechanical equipment, engine components, engine sealing, etc., can solve the problems of unsatisfactory corrosion resistance, large friction loss, short life, etc., to improve the effect of friction reduction and improve the use of Life and the effect of reducing the coefficient of friction

Active Publication Date: 2020-09-18
XUZHOU JIULONG SEAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The products produced by the existing polyurethane elastomers cannot meet these special requirements, and the existing polyurethane elastomers have defects such as large friction loss, unsatisfactory corrosion resistance, and short life in use.

Method used

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  • Modified polyurethane elastomer, and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1, a kind of modified polyurethane elastomer

[0037] Described modified polyurethane elastomer comprises following components and mass parts thereof:

[0038] 85 parts of polytetrahydrofuran polyol, 10 parts of modified polytetrafluoroethylene micropowder, 30 parts of toluene diisocyanate, 6 parts of polyvinyl alcohol, 10 parts of plasticizer, 12 parts of chain extender, and 0.05 part of catalyst; The average molecular weight of alcohol is 1000; the average molecular weight of the polyvinyl alcohol is 16000; the plasticizer is dimethylethylene glycol phthalate; the chain extender is glycerin; the catalyst is dilaurel dibutyltin acid.

[0039] The preparation method of described modified polytetrafluoroethylene micropowder is:

[0040] (1) Get polytetrafluoroethylene micropowder, join in the mixed liquor that forms by volume ratio 8:3:1 by absolute ethanol, oleic acid and water, make the mass concentration of polytetrafluoroethylene micropowder in mixed liq...

Embodiment 2

[0047] Embodiment 2, a kind of modified polyurethane elastomer

[0048] Described modified polyurethane elastomer comprises following components and mass parts thereof:

[0049] 110 parts of polytetrahydrofuran polyols, 20 parts of modified polytetrafluoroethylene micropowders, 40 parts of toluene diisocyanate, 10 parts of polyvinyl alcohol, 15 parts of plasticizers, 18 parts of chain extenders, and 0.15 parts of catalysts; The average molecular weight of alcohol is 1000; The average molecular weight of the polyvinyl alcohol is 16000; The plasticizer is diisobutyl phthalate; The chain extender is composed of glycerin and ethylene glycol in a mass ratio of 7:3 Composition; The catalyst is composed of dibutyltin dilaurate and dibutyltin dioctoate in a mass ratio of 5:1.

[0050] The preparation method of described modified polytetrafluoroethylene micropowder is:

[0051] (1) Get polytetrafluoroethylene micropowder, join in the mixed solution that forms by volume ratio 8:3:1 by...

Embodiment 3

[0058] Embodiment 3, a kind of modified polyurethane elastomer

[0059] Described modified polyurethane elastomer comprises following components and mass parts thereof:

[0060] 100 parts of polytetrahydrofuran polyol, 15 parts of modified polytetrafluoroethylene micropowder, 35 parts of toluene diisocyanate, 7 parts of polyvinyl alcohol, 12 parts of plasticizer, 15 parts of chain extender, 0.12 part of catalyst; The average molecular weight of alcohol is 1000; the average molecular weight of the polyvinyl alcohol is 16000; the plasticizer is diisobutyl phthalate; the chain extender is composed of glycerin and triethanolamine in a mass ratio of 4:1 ; The catalyst is composed of dibutyltin dilaurate and stannous octoate in a mass ratio of 2:9.

[0061] The preparation method of described modified polytetrafluoroethylene micropowder is:

[0062] (1) Get polytetrafluoroethylene micropowder, join in the mixed solution that forms by volume ratio 8:3:1 by absolute ethanol, oleic a...

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Abstract

The invention belongs to the technical field of polyurethane sealing elements, and particularly relates to a modified polyurethane elastomer, and a preparation method and application thereof. The modified polyurethane elastomer is prepared from, by mass, 85 to 110 parts of polytetrahydrofuran polyol, 10 to 20 parts of modified polytetrafluoroethylene micro powder, 30 to 40 parts of toluene diisocynate, 6 to 10 parts of polyvinyl alcohol, 10 to 15 parts of a plasticizer, 12 to 18 parts of a chain extender and 0.05 to 0.15 part of a catalyst. According to the modified polyurethane elastomer provided by the invention, the corrosion resistance, the wear resistance and the solvent resistance of the product are remarkably improved, the friction coefficient is greatly reduced, and the special requirements of the product on the performance in some special environments are met. The modified polyurethane elastomer provided by the invention has excellent mechanical properties, corrosion resistance and good wear resistance and friction reduction performance, and is particularly suitable for being applied to hydraulic sealing elements.

Description

technical field [0001] The invention belongs to the technical field of polyurethane seals, and in particular relates to a modified polyurethane elastomer and its preparation method and application. Background technique [0002] With excellent physical properties and oil resistance, polyurethane elastomer has become the most important seal material for hydraulic transmission and control systems. When polyurethane elastomer is used as a seal, it is required to have a low coefficient of friction in addition to excellent mechanical strength, wear resistance, and medium resistance. This is because if the friction coefficient is too large, when the seal is insufficiently lubricated, the local temperature of the product will be too high, resulting in extrusion or premature aging, shortening the service life of the seal. [0003] The existing polyurethane elastomers can meet the performance requirements of the products in most application fields, but when some products are used in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/12C08G18/66C08G18/48C08G18/62C08G18/32C08L75/08C08L27/18C08L33/00C08L97/00C08K5/12F16J15/10F16J15/328F16J15/3284
CPCC08G18/12C08G18/4063C08G18/4854C08G18/6212C08G18/6674C08G18/6677C08G18/6688C08L75/08C08L2205/035F16J15/102F16J15/108F16J15/328F16J15/3284C08G18/3206C08G18/3281C08L27/18C08L33/00C08L97/005C08K5/12
Inventor 李怀庆孙延春张鹤陆飞龙周国柱
Owner XUZHOU JIULONG SEAL TECH CO LTD
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