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Polyurethane elastomer used as counterweight guide shoe lining and preparation method and application of polyurethane elastomer

A technology of polyurethane elastomer and polyurethane prepolymer, which is applied in the field of polyurethane elastomer, can solve the problems of affecting the ride comfort of elevators, affecting the service life of guide shoes, and high hardness of engineering plastics, achieving long service life, excellent wear resistance, The effect of good damping shock absorption performance

Inactive Publication Date: 2016-06-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Engineering plastics have high hardness, low elongation at break, and poor cushioning and shock absorption performance, which affects the ride comfort of the elevator
At the same time, the wear resistance of engineering plastics is not good, which affects the service life of guide shoes

Method used

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  • Polyurethane elastomer used as counterweight guide shoe lining and preparation method and application of polyurethane elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method for a polyurethane elastomer used as an elevator counterweight guide shoe lining, comprising the following steps:

[0025] (1) Preparation of polyurethane prepolymer: 63 parts by mass of branched polytetrahydrofuran diol (brand PTG-L1000) with a molecular weight of 1000, 37 parts by mass of polycaprolactone diol (brand PCL210N) with a molecular weight of 1000, methanol Mix 0.6 parts by mass of base silicone oil (brand DM12500) and 1.0 parts by mass of fumed silica (brand R972), heat to 115±5°C, evacuate until the residual pressure is less than 500Pa, keep warm for 2 hours, and then cool down to 55±3 ℃, slowly drop it into 33±3℃, 139 parts by weight of 2,4-toluene diisocyanate, control the dropping speed, and keep the temperature of the reaction mixture system between 60-70℃. After the dropwise addition, keep warm for 1 hour, then raise the temperature to 82±2°C and react for 2 hours; then perform short-path distillation on the reaction mixture until...

Embodiment 2

[0028] A preparation method for a polyurethane elastomer used as an elevator counterweight guide shoe lining, comprising the following steps:

[0029] (1) Preparation of polyurethane prepolymer: 69 parts by mass of branched polytetrahydrofuran diol (brand PTG-L2000) with a molecular weight of 2000, 31 parts by mass of polycaprolactone diol (brand PCL220N) with a molecular weight of 2000, methanol Mix 1.0 parts by mass of base silicone oil (brand DM20000) and 2.0 parts by mass of fumed silica (brand HB615), heat to 120±5°C, evacuate until the residual pressure is less than 500Pa, keep warm for 2 hours, and then cool down to 55±3 ℃, slowly drop it into 35±3℃, 87 parts by weight of 2,4-toluene diisocyanate, control the dropping speed, and keep the temperature of the reaction mixture system between 60-70℃. After the dropwise addition, keep warm for 1.5 hours, then raise the temperature to 82±2°C and react for 2 hours; then conduct short-path distillation on the reaction mixture un...

Embodiment 3

[0032] A preparation method for a polyurethane elastomer used as an elevator counterweight guide shoe lining, comprising the following steps:

[0033] (1) Preparation of polyurethane prepolymer: 73 parts by mass of branched polytetrahydrofuran diol (brand PTG-L2000) with a molecular weight of 2000, 27 parts by mass of polycaprolactone diol (brand name CAPA2101A) with a molecular weight of 1000, methanol Mix 3.0 parts by mass of base silicone oil (brand DM30000) and 2.0 parts by mass of fumed silica (brand A200), heat to 120±5°C, evacuate until the residual pressure is less than 500Pa, keep warm for 2 hours, and then cool down to 55±3 ℃, slowly drop it into 35±3℃, 181 parts by weight of 2,4-toluene diisocyanate, control the dropping speed, and keep the temperature of the reaction mixture system between 60-70℃. After the dropwise addition, keep warm for 2.0 hours, then raise the temperature to 82±2°C and react for 2 hours; then perform short-path distillation on the reaction mix...

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Abstract

The invention discloses polyurethane elastomer used as a counterweight guide shoe lining and a preparation method and application of the polyurethane elastomer.The preparation method includes: dispersing methyl silicone oil and nano white carbon black into oligomer polyol, keeping the temperature for 2 hours, dripping into 2, 4-toluene diisocyanate, and reacting for 2 hours; performing short-path distillation on the reaction mixture until the percentage content of free isocyanate monomer is lower than 0.5% to obtain polyurethane prepolymer; regulating the proportion of the polyurethane prepolymer to chain extender according to chain extender use amount coefficient of 0.92-1.05, and starting a pouring machine to pour the mixed material into a die for casting molding, wherein a guide shoe framework is placed in the die, and the die is preheated to 115-130 DEG C.Compared with an existing engineering plastic shoe lining, the polyurethane elastomer used as the counterweight guide shoe lining of a high-speed elevator has the advantages that good shock absorption performance is achieved, the elevator is comfortable to ride, good wear resistance is achieved, and the shoe lining is long in service life.

Description

technical field [0001] The present invention relates to a kind of polyurethane elastomer, more specifically, to a kind of polyurethane elastomer used for high-speed elevator counterweight guide shoe lining and its preparation method and application. Background technique [0002] At present, engineering plastics such as polytetrafluoroethylene, ultra-high molecular weight polyethylene, etc. are generally used as counterweight guide shoe linings in the market. Engineering plastics have high hardness, low elongation at break, and poor cushioning and shock absorption performance, which affects the ride comfort of the elevator. At the same time, the wear resistance of engineering plastics is not good, which affects the service life of the guide shoe. [0003] The cast polyurethane elastomer has a wide range of hardness, good cushioning and shock absorption performance, good wear resistance and excellent oil resistance. Therefore, it has a good application prospect to use cast p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L83/04C08G18/76C08G18/66C08G18/48C08G18/42C08G18/12C08K3/36
CPCC08G18/12C08G18/4018C08G18/4277C08G18/4854C08G18/7614C08G2350/00C08K3/36C08K2201/011C08L75/08C08L83/04C08G18/3814C08G18/3868
Inventor 易玉华李宗景
Owner SOUTH CHINA UNIV OF TECH
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