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High temperature-resistant, hydrolysis-resistant and low-transformation ratio type TPU (thermoplastic polyurethane) for sealing ring of air cylinder and synthesizing method thereof

A synthesis method and hydrolysis-resistant technology, which is applied in TPU for hydrolysis-resistant, low-pressure variable cylinder sealing rings and synthesis, and high-temperature resistance fields. It can solve the problems of large environmental pollution, high comprehensive cost, and low production efficiency, and achieve the improvement of hydrolysis resistance. , Improved hydrolysis resistance, improved molding speed

Inactive Publication Date: 2017-09-26
大连中海达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of TPU for cylinder sealing ring with high temperature resistance, hydrolysis resistance and low compression set and its synthesis method, so as to solve the problem of low production efficiency, high comprehensive cost and great environmental pollution in the production process of rubber sealing ring The problem

Method used

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  • High temperature-resistant, hydrolysis-resistant and low-transformation ratio type TPU (thermoplastic polyurethane) for sealing ring of air cylinder and synthesizing method thereof
  • High temperature-resistant, hydrolysis-resistant and low-transformation ratio type TPU (thermoplastic polyurethane) for sealing ring of air cylinder and synthesizing method thereof
  • High temperature-resistant, hydrolysis-resistant and low-transformation ratio type TPU (thermoplastic polyurethane) for sealing ring of air cylinder and synthesizing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In the embodiment of the present invention, a high temperature resistant, hydrolysis resistant, low pressure variable cylinder seal ring TPU includes the following raw materials:

[0027]

[0028] A method for synthesizing TPU with high temperature resistance, hydrolysis resistance and low pressure variable cylinder sealing ring, comprising the following steps:

[0029] 1) Heat polycaprolactone diol to 80°C, then add antioxidant 1010, stir at a speed of 2800r / min, then add 4-4 diphenylmethane diisocyanate at 70°C, and then stir at 120r / min Continue to stir the mixture at a speed of 1 min. During the stirring process, ensure that the temperature of the mixture is between 85°C and 90°C. After reacting for 2 hours, the mixture material A is prepared and kept at 100°C for later use.

[0030] 2) Add polycarbodiimide and molten hydroquinone dihydroxyethyl ether to the mixture A, stir at a speed of 2800r / min under vacuum for 20 seconds, and pour it into a constant temperatu...

Embodiment 2

[0032] In the embodiment of the present invention, a high temperature resistant, hydrolysis resistant, low pressure variable cylinder seal ring TPU includes the following raw materials:

[0033]

[0034]

[0035] A method for synthesizing TPU with high temperature resistance, hydrolysis resistance and low pressure variable cylinder sealing ring, comprising the following steps:

[0036] 1) Heat polycaprolactone diol to 100°C, then add antioxidant 1010, stir at a speed of 2800r / min, then add 4-4'diphenylmethane diisocyanate at 80°C, and then stir at 120r / min Continue to stir the mixture at a speed of 1 min. During the stirring process, ensure that the temperature of the mixture is between 85°C and 90°C. After reacting for 2 hours, the mixed material A is prepared and kept at 120°C for later use.

[0037] 2) Add polycarbodiimide and molten hydroquinone bishydroxyethyl ether to the mixture A, stir at a speed of 2800r / min under vacuum for 40 seconds, and pour it into a consta...

Embodiment 3

[0039] In the embodiment of the present invention, a high temperature resistant, hydrolysis resistant, low pressure variable cylinder seal ring TPU includes the following raw materials:

[0040]

[0041] A method for synthesizing TPU with high temperature resistance, hydrolysis resistance and low pressure variable cylinder sealing ring, comprising the following steps:

[0042] 1) Heat polycaprolactone diol to 85°C, then add antioxidant 1010, stir at a speed of 2800r / min, then add 4-4'diphenylmethane diisocyanate at 75°C, and then stir at 120r / min Continue to stir the mixture at a speed of 1 min. During the stirring process, ensure that the temperature of the mixture is between 85°C and 90°C. After reacting for 2 hours, the mixture material A is prepared and kept at 105°C for later use.

[0043] 2) Add polycarbodiimide and molten hydroquinone dihydroxyethyl ether to the mixture A, stir at a speed of 2800r / min under vacuum for 25 seconds, and pour it into a constant temperatu...

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Abstract

The invention discloses high temperature-resistant, hydrolysis-resistant and low-transformation ratio type TPU (thermoplastic polyurethane) for a sealing ring of an air cylinder and a synthesizing method thereof. The TPU is prepared from the following raw materials of 950 to 1050 parts of poly(caprolactone)diol, 240 to 270 parts of 4-4' diphenylmethane diisocyanate, 95 to 102 parts of hydroquinone bis(2-hydroxyethyl)ether, 11 to 16 parts of polycarbodiimide, and 2 to 3 parts of additive. The synthesizing method comprises the following steps of heating the poly(caprolactone)diol, adding the additive, and uniformly stirring; adding the 4-4'diphenylmethane diisocyanate, adding polycarbodiimide and melted hydroquinone bis(2-hydroxyethyl)ether, and stirring under the vacuum condition; aging, crushing, drying, injecting and molding, and forming, so as to obtain the TPU. The synthesizing method has the advantages that the production efficiency is higher than the molding vulcanizing forming of rubber, the comprehensive cost is low, the pollution to environment is approximate to 0, and the rubber can be perfectly replaced in the air seal matrix; the defects of heat-resistant property, hydrolysis-resistant property and compression permanent deformation in the common PTU are overcome, the processing, forming and cooling time is only equal to one half of the processing, forming and cooling time of the common TPU, the production efficiency is further improved, and the comprehensive energy consumption is decreased.

Description

technical field [0001] The invention relates to the technical field of sealing ring materials, in particular to a high-temperature-resistant, hydrolysis-resistant, low-pressure variable cylinder sealing ring TPU and a synthesis method that can perfectly replace rubber materials. Background technique [0002] At present, medium and low pressure cylinders are widely used in all walks of life with their own characteristics, and even replace the position of hydraulic cylinders in some industry applications. Their characteristics are mainly flexible, quick response, precise control, and excellent work adaptability. , Obvious cost advantages, etc. As the core component of the cylinder, the seal ring has very strict quality requirements. At present, the material of the domestic cylinder seal ring is mostly rubber, and there are many unavoidable problems in production efficiency, overall cost, and environmental pollution. Some manufacturers have tried to use Ordinary TPU is used as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/32C08G18/42C08G18/76
CPCC08G18/664C08G18/3215C08G18/4277C08G18/7671
Inventor 王东凯
Owner 大连中海达科技有限公司
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