Polyurethane elastomer for fine wear-resistant screen mesh and preparation method of polyurethane elastomer

A polyurethane elastomer and screen technology, which is applied in the field of materials, can solve the problems of limiting the popularization and application of polyurethane fine screens, reduced wear resistance, large deformation rate, etc., and achieves excellent mechanical properties and operational performance, long service life, and mechanical performance lasting effect

Inactive Publication Date: 2016-06-08
WEIHAI HAIWANG HYDROCYCLONE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing polyurethane elastomer has a large internal heat generation, a large deformation rate, and a greatly reduced wear resistance in the high-frequency vibration scour environment.
Thereby limiting the promotion and application of polyurethane fine screen in the mining industry

Method used

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  • Polyurethane elastomer for fine wear-resistant screen mesh and preparation method of polyurethane elastomer
  • Polyurethane elastomer for fine wear-resistant screen mesh and preparation method of polyurethane elastomer
  • Polyurethane elastomer for fine wear-resistant screen mesh and preparation method of polyurethane elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A polyurethane elastomer for fine wear-resistant screens, which is prepared from a prepolymer synthesized from polyether polyol and diisocyanate after curing and vulcanization. The prepolymer contains nano-scale potassium aluminum silicate powder with a particle size of 50-200nm , nano-scale potassium aluminum silicate powder is added to the prepolymer in the form of nano-potassium aluminum silicate additives, and the weight of nano-scale potassium aluminum silicate powder in the additives accounts for 30%-50% by weight of the weight of the organic solvent. The additive amount of the agent accounts for 10%-20% by weight of the weight of the prepolymer, and the free diisocyanate weight content in the prepolymer is lower than 0.1% by weight. The prepolymer also contains antioxidant 1010, and its chemical name is: four [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and UV stabilizer UV-328, chemical name: 2(2-hydroxy-3,5-di-tert-butyl Phenyl)-5-ch...

Embodiment 2

[0037] A polyurethane elastomer for fine wear-resistant screens, which is prepared from a prepolymer synthesized from polyether polyol and diisocyanate after curing and vulcanization. The prepolymer contains nano-scale potassium aluminum silicate powder with a particle size of 50-200nm , nano-scale potassium aluminum silicate powder is added to the prepolymer in the form of nano-potassium aluminum silicate additives, and the weight of nano-scale potassium aluminum silicate powder in the additives accounts for 30%-50% by weight of the weight of the organic solvent. The additive amount of the agent accounts for 10%-20% by weight of the weight of the prepolymer, and the free diisocyanate weight content in the prepolymer is lower than 0.1% by weight. The prepolymer also contains antioxidant 1010, and its chemical name is: four [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and UV stabilizer UV-328, chemical name: 2(2-hydroxy-3,5-di-tert-butyl Phenyl)-5-ch...

Embodiment 3

[0050] A polyurethane elastomer for fine wear-resistant screens, which is prepared from a prepolymer synthesized from polyether polyol and diisocyanate after curing and vulcanization. The prepolymer contains nano-scale potassium aluminum silicate powder with a particle size of 50-200nm , nano-scale potassium aluminum silicate powder is added to the prepolymer in the form of nano-potassium aluminum silicate additives, and the weight of nano-scale potassium aluminum silicate powder in the additives accounts for 30%-50% by weight of the weight of the organic solvent. The additive amount of the agent accounts for 10%-20% by weight of the weight of the prepolymer, and the free diisocyanate weight content in the prepolymer is lower than 0.1% by weight. The prepolymer also contains antioxidant 1010, and its chemical name is: four [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and UV stabilizer UV-328, chemical name: 2(2-hydroxy-3,5-di-tert-butyl Phenyl)-5-ch...

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Abstract

The invention relates to a polyurethane elastomer for a fine wear-resistant screen mesh and a preparation method of the polyurethane elastomer. The polyurethane elastomer disclosed by the invention is characterized in that a nano-silicon powder additive is added in a reaction process; the average particle diameter of nano-silicon powder in the additive is smaller than or equal to 200 nm; free diisocyanate in a prepolymer is effectively removed by utilization of a scraper film evaporator at a later stage of prepolymer synthesis; the weight content of the diisocyanate is smaller than 0.1 percent; an antioxidant and an ultraviolet stabilizing agent are reasonably added. The preparation method has the advantages that the reaction tends to be reasonable; the prepared polyurethane elastomer has the features of regular molecular chain structure, low viscosity, little smell, excellent mechanical property and excellent operation property; the abrasion resistance of the polyurethane elastomer is obviously higher than that of the conventional elastomer, the internally produced heat can be effectively reduced, and the polyurethane elastomer is especially suitable for being used in a high-frequency vibration environment.

Description

technical field [0001] The invention relates to the field of material technology, mainly relates to a polyurethane elastomer, in particular to a polyurethane elastomer used for making fine wear-resistant screens and a preparation method thereof. Among them, it exhibits excellent tensile resistance, deformation resistance, low internal heat generation, and anti-wear properties. Background technique [0002] At present, the known polyurethane elastomers are polyols and isocyanates mixed in a certain proportion and reacted at about 80°C to form prepolymers, and then cured with corresponding curing agents to form polyurethane elastomers after post-vulcanization. However, the existing polyurethane elastomer has a large internal heat generation, a large deformation rate, and a greatly reduced wear resistance in the high-frequency vibration scour environment. Thereby limiting the popularization and application of polyurethane fine mesh in mining industry. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/38C08G18/10C08K3/34
CPCC08G18/7671C08G18/10C08G18/4854C08G18/6685C08K3/34C08K2201/003C08K2201/011C08G18/3855
Inventor 杨华明刘强
Owner WEIHAI HAIWANG HYDROCYCLONE
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