Permanent-compression-resistant sealing ring for carrier roller and preparation method of permanent-compression-resistant sealing ring

[0027] A kind of permanent compression-resistant sealing ring for idler, its raw materials include: nitrile rubber 80kg, fluorine rubber 10kg, graphene oxide 5kg, inorganic composite carbon 10kg, polytetrahydrofuran ether glycol 5kg, isophorone diisocyanate 2kg , Zinc oxide 1kg, stearic acid 1kg, dibutyltin dilaurate 0.1kg, antioxidant 1kg, plasticizer 1kg, accelerator 1kg, sulfur 1kg.

[0028] The inorganic composite carbon is prepared by the following specific steps:

[0029] Add 10kg of phenol into the reactor, add 1kg of sodium hydroxide solution with a concentration of 0.5mol / L to it under agitation, and dropwise add 15kg of 20% formaldehyde solution to it under agitation, react at 70°C to a viscosity for 40s (coating -4 cups, 25°C) to obtain a phenolic resin dispersion;

[0030] Add 10kg of 40-mesh wood powder to 26kg of phenolic resin dispersion with a mass fraction of 24%, stir at a speed of 200r / min for 1 hour, stand at room temperature for 1 day, filter, dry at 80°

[0037] A kind of permanent compression resistant sealing ring for idler, its raw materials include: nitrile rubber 120kg, fluorine rubber 20kg, graphene oxide 15kg, inorganic composite carbon 20kg, polytetrahydrofuran ether glycol 15kg, isophorone diisocyanate 8kg , Zinc oxide 2kg, stearic acid 2kg, dibutyltin dilaurate 1kg, antioxidant 2kg, plasticizer 2kg, accelerator 2kg, sulphur 2kg.

[0038] The inorganic composite carbon is prepared by the following specific steps:

[0039] 20kg of phenol was added to the reactor, 4kg of sodium hydroxide solution with a concentration of 1.2mol / L was added to it under stirring, and 30kg mass fraction was added dropwise to it under stirring to be 30% aqueous formaldehyde solution, and the reaction was performed at 90 ° C to the viscosity for 55s (coating -4 cups, 25°C) to obtain a phenolic resin dispersion;

[0040]Add 20kg of 40-mesh wood powder to 54kg of phenolic resin dispersion with a mass fraction of 57%, stir at a speed of 300r / mi

[0047] A kind of permanent compression resistant sealing ring for idler, its raw materials include: nitrile rubber 90kg, fluorine rubber 18kg, graphene oxide 8kg, inorganic composite carbon 17kg, polytetrahydrofuran ether glycol 8kg, isophorone diisocyanate 6kg , Zinc oxide 1.3kg, stearic acid 1.8kg, dibutyltin dilaurate 0.3kg, antioxidant 1.7kg, plasticizer 1.2kg, accelerator 1.5kg, sulfur 1.3kg.

[0048] The inorganic composite carbon is prepared by the following specific steps:

[0049] 17kg of phenol was added to the reactor, and 2kg of sodium hydroxide solution was added at a concentration of 1 mol / L to it under agitation, and 20kg of mass fraction was added dropwise to it under agitation to be a 28% aqueous formaldehyde solution, and the reaction was performed at 75° C. to a viscosity of 1 mol / L. 50s (coating -4 cups, 25°C) to obtain a phenolic resin dispersion;

[0050] Add 12kg of 40-mesh wood powder to 30kg of phenolic resin dispersion with a mass fraction of 46%, s