Cross-linked anti-fatigue and anti-wear polyurethane rubber

A polyurethane rubber, anti-fatigue technology, applied in the field of rubber, can solve the problems of non-abrasion resistance, fatigue resistance and damage of the rubber layer, difficult control of internal defect structure, short service life, etc., and achieve good hydrolysis resistance and mold resistance, Facilitate industrial production and improve mechanical properties

Active Publication Date: 2015-01-28
JIANGSU GUANGDING PIPE IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Styrene butadiene rubber, butyl rubber, nitrile rubber, EPDM rubber, neoprene, silicone rubber, fluorine rubber, etc. Although there are many kinds of flexible rubber for marine flexible joints, their single characteristics often lead to their use short life
It is mainly manifested in the poor weather resistance of the rubber, the non-abrasion resistance of the rubber layer, and the poor resistance to fatigue and damage. Therefore, it is very necessary to improve the weather resistance and wear resistance of the rubber.
In addition, the traditional marine flexible joint is composed of an inner rubber layer, a reinforcing layer with multi-layer scraped nylon cord fabric, and a rubber tube compounded with an outer rubber layer. It is difficult to control the internal defects and its structure during the preparation process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 400KG of polytetrahydrofuran diol, 45KG of cyclopolypropylene oxide ether triol, and 3KG of molybdenum disulfide, which are the initiators of polyurethane rubber prepolymer, mix them and pump them into the reaction kettle through a vacuum pump, heat them to 100°C and stir them under negative pressure. Vacuum dehydration at 0.1MPa for 30 minutes, then cool down to 45°C, then add 90KG of toluene diisocyanate and 40KG of 1,5-naphthalene diisocyanate, stir and start the reaction while controlling the reaction temperature below 90°C, stop when the reaction temperature drops to room temperature Stir, keep the reactor sealed and stand still for 24 hours, then reheat to 90°C, stir and vacuumize and dehydrate under negative pressure 0.1MPa for 2 hours, then keep the polyurethane prepolymer material temperature at 80°C, and then according to the mass ratio of 100:0.5:10 Weigh carbon black and chain extender di-o-chlorodiphenylamine methane, heat and melt, and then stir in a ...

Embodiment 2

[0022] Weigh 400KG of polytetrahydrofuran diol, 45KG of cyclopolypropylene oxide ether triol, and 3KG of molybdenum disulfide, which are the initiators of polyurethane rubber prepolymer, mix them and pump them into the reaction kettle through a vacuum pump, heat them to 100°C and stir them under negative pressure. Vacuum dehydration at 0.1MPa for 30 minutes, then cool down to 45°C, then add 90KG of toluene diisocyanate and 45KG of 1,5-naphthalene diisocyanate, stir and start the reaction while controlling the reaction temperature below 90°C, stop when the reaction temperature drops to room temperature Stir, keep the reactor sealed and stand still for 24 hours, then reheat to 90°C, stir and vacuumize and dehydrate under negative pressure 0.1MPa for 2 hours, then keep the polyurethane prepolymer material temperature at 80°C, and then according to the mass ratio of 100:4:8 Weigh the chain extender trimethylolpropane and di-o-chlorodianiline methane, heat and melt, and then stir in...

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PUM

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Abstract

The invention discloses a method for preparing cross-linked anti-fatigue and anti-wear polyurethane rubber. The cross-linked anti-fatigue and anti-wear polyurethane rubber comprises the following components in percentage by mass: 65-70% of polytetramethylene glycol, 6-10% of cyclic polypropylene oxide ether triatomic alcohol, 14-20% of toluene diisocyanate, 5-8% of 1,5-naphthalene diisocyanate, 1-3% of di-o-chlorodiphenylamine methane, 0.5-1.5% of trimethylolpropane, 0-0.5% of carbon black and 1-2% of molybdenum disulfide. The rubber has the advantages of high wear resistance, good resilience, good low-temperature resistance, high tensile strength, predominant hydrolysis resistance, good adhesion to metal, shock resistance and relatively good anti-fatigue performance.

Description

technical field [0001] The product of the invention relates to a rubber, in particular to a cross-linked anti-fatigue and wear-resistant polyurethane rubber. Background technique [0002] Styrene butadiene rubber, butyl rubber, nitrile rubber, EPDM rubber, neoprene, silicone rubber, fluorine rubber, etc. Although there are many kinds of flexible rubber for marine flexible joints, their single characteristics often lead to their use Short life. It is mainly manifested in the poor weather resistance of the rubber, the non-abrasion resistance of the rubber layer, and the poor resistance to fatigue and damage. Therefore, it is very necessary to improve the weather resistance and wear resistance of the rubber. In addition, the traditional marine flexible joint is composed of an inner rubber layer, a reinforcing layer with multi-layer scraped nylon cord fabric, and a rubber tube compounded with an outer rubber layer. It is difficult to control the internal defects and its structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32C08G18/12C08K3/04C08K3/30
CPCC08G18/12C08G18/3206C08G18/3814C08G18/4812C08G18/4845C08G18/4854C08G18/667C08G18/6681C08G18/7607C08G18/7614C08G18/7678C08K3/04C08K3/30C08K2003/3009C08G18/38C08L75/08
Inventor 张凯杰张刚
Owner JIANGSU GUANGDING PIPE IND TECH CO LTD
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