Preparation method for polyurethane solid tire used for mining vehicle

A solid tire and polyurethane technology, applied in the field of polyurethane materials, can solve the problems of good compression resilience of tires, heavy load of mining vehicles, and small load deformation, so as to improve tear strength and wear resistance, and reduce load deformation. Variable, rigidity-enhancing effects

Active Publication Date: 2019-04-12
JIAXING HEXIN CHEM IND
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  • Abstract
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Problems solved by technology

Polyurethane solid tires for mining vehicles should meet the following requirements: (1) The mining vehicle has a huge load, the tire needs to have good compression resilience, small load deformation, and good running stability; (2) Good wear resistance and tear strength High; (3) Hydrolysis resistance, solvent resistance and aging resistance are good, and the mining environment is special, and various substances such as humidity, oiliness, and corrosiveness will be in contact; (4) The anti-skid performance of the tire meets the requirements, and the poor anti-skid performance is polyurethane Material's biggest downside

Method used

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  • Preparation method for polyurethane solid tire used for mining vehicle

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preparation example Construction

[0010] The steps of the preparation method of this polyurethane solid tire for mining vehicles are as follows:

[0011] (1) Preparation of polyester polyol: mixing dibasic acid and polyol with a mass ratio of 100: (65~80), carrying out polyesterification reaction under the action of catalyst A to obtain polyester polyol, Wherein the dibasic acid is a mixture of sebacic acid and adipic acid in a mass ratio of 100:(0-100), and the polyhydric alcohol is 1,6-hexanediol, neopentyl glycol and trimethylolpropane A mixture with a mass ratio of 100:(10~50):(0~0.5);

[0012] (2) Preparation of component A: mix the polyester polyol prepared in step (1) with the chain extender and p-phenylene diisocyanate in a mass ratio of 100:(12~20):(8~14), Carry out the prepolymerization reaction, make the oligomer a with hydroxyl terminated, then oligomer a and hydroxyl terminated liquid rubber, organosilicon foam stabilizer, catalyst B, foaming agent with mass ratio 100: (20~50): (0.4~1):(1.8~3.5)...

Embodiment 1

[0029] (1) Mix 113kg of sebacic acid, 67.8kg of 1,6-hexanediol, 7.1kg of neopentyl glycol, 0.33kg of trimethylolpropane, and 0.8kg of tetraisopropyl titanate, and heat to 230°C under nitrogen protection Carry out the polyesterification reaction, and stop the reaction when the acid value is 0.8 mgKOH / g and the hydroxyl value is 112 mgKOH / g, and polyester polyol is obtained.

[0030] (2) Preparation of component A: Put 150kg of the polyester polyol prepared in step (1) into the reactor, heat it to 95°C, add 14.4kg of 3,3'-dichloro-4,4'-diaminodiphenyl Methyl methane, 3.6kg ethylene glycol, mix evenly, after the chain extender is completely dissolved, add 12kg p-phenylene diisocyanate, mix well, after the p-phenylene diisocyanate is completely dissolved, cool down with water bath, quickly drop to 70°C, react For one hour, add 85kg of hydroxyl-terminated polybutadiene acrylonitrile, 0.68kg of DC-3042, 3.1kg of catalyst triethylenediamine, and 0.34kg of water, and mix well to obtai...

Embodiment 2

[0034] (1) Mix 79.7kg of sebacic acid, 33.3kg of adipic acid, 63.3kg of 1,6-hexanediol, 15.8kg of neopentyl glycol, 0.19kg of trimethylolpropane, and 0.8kg of tetraisopropyl titanate, Under the protection of nitrogen, heat to 233°C for polyesterification reaction, stop the reaction when the acid value is 0.8 mgKOH / g, and the hydroxyl value is 86 mgKOH / g, to obtain polyester polyol.

[0035] (2) Preparation of component A: Put 150kg of the polyester polyol prepared in step (1) into the reactor, heat it to 95°C, add 16.2kg of 3,3'-dichloro-4,4'-diaminodiphenyl Methyl methane, 4.8kg ethylene glycol, mix evenly, after the chain extender is completely dissolved, add 15kg p-phenylene diisocyanate, mix well, after the p-phenylene diisocyanate is completely dissolved, cool down with water bath, quickly drop to 70°C, react For one hour, add 75.6kg of hydroxyl-terminated hydrogenated polybutadiene, 0.9kg of DC-3042, 4.2kg of catalyst triethylenediamine, and 0.34kg of water, and mix well...

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Abstract

The invention provides a preparation method for a polyurethane solid tire used for a mining vehicle. The preparation method comprises the following steps: (1) allowing binary acid to react with polyolso as to prepare polyester polyol; (2) subjecting the polyester polyol prepared in the step (1), a chain extender and p-phenylene diisocyanate to a prepolymerization reaction so as to prepare a hydroxyl-terminated oligomer a, and mixing the hydroxyl-terminated oligomer a with hydroxyl-terminated liquid rubber, an organosilicone foam stabilizer, a catalyst and a foaming agent so as to obtain a component A; (3) subjecting polycarbonate polyol, polytetrahydrofuran polyol and the p-phenylene diisocyanate to a prepolymerization reaction so as to prepare a hydroxyl-terminated oligomer b, and subjecting the hydroxyl-terminated oligomer b and isocyanate to a prepolymerization reaction so as to obtain a component B; and (4) mixing the component A and the component B, pouring an obtained mixture into a tire mold, and carrying out curing so as to obtain a product. The preparation method provided by the invention improves tear strength and wear resistance of a polyurethane tire, overcomes the disadvantage of poor anti-slipping performance of the polyurethane tire, reinforces rigidity, reduces the load deformation quantity of a tire, and reinforces compression resilience, hydrolysis resistanceand aging resistance.

Description

technical field [0001] The invention relates to the field of polyurethane materials, in particular to a method for preparing a solid polyurethane tire for mining vehicles. Background technique [0002] Polyurethane solid tires are more and more widely used in the field of life, mainly used in low-speed vehicles, such as wheelchairs, shared bicycles, toy cars, trolleys, etc., and less used in heavy industrial vehicles and machinery. At present, domestic mining vehicles basically use rubber pneumatic tires. Due to the complex working environment of mining vehicles, rubber pneumatic tires are easy to wear and puncture. Generally, a layer of metal protection chains are tied to the pneumatic tires. It is troublesome to use, and the tires wear quickly, which is dangerous. High, there is no good way to solve this kind of problem for pneumatic tires. Using rubber solid tires instead of pneumatic tires can avoid the above problems, but rubber solid tires have extremely high density,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/69C08G18/48C08G18/42C08G18/44C08G18/38C08G18/32
CPCC08G18/3206C08G18/3814C08G18/4018C08G18/4236C08G18/44C08G18/4854C08G18/6607C08G18/6618C08G18/698
Inventor 倪俊俊纪尚超石磊沈连根李寿伟徐欣欣陈海龙
Owner JIAXING HEXIN CHEM IND
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