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High-performance polyurethane sealing material for large-scale equipment and preparation method of sealing material

A technology of large-scale equipment and sealing materials, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as harsh hydraulic impact force in operating environment, achieve good hydrolysis stability, improve high temperature resistance, and reduce energy consumption.

Inactive Publication Date: 2012-03-28
ZHEJIANG XIPULI SEALING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the bubbles in the reaction process are difficult to eliminate, and the compounded isocyanates still cannot meet the requirements of harsher operating environment, stronger hydraulic impact, higher frequency of use, and large-scale manufacturing equipment, there is an urgent need for a high-performance polyurethane sealant. The material can not only improve the high temperature resistance and impact resistance of the sealing material, but also obtain better hydrolytic stability, low hardness and defoaming properties during the reaction process to meet the needs of the process and products, and reduce the damage caused by dehydration. energy consumption

Method used

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  • High-performance polyurethane sealing material for large-scale equipment and preparation method of sealing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Taking the total weight of 100g as an example, first add 50g of polyε-caprolactone polyol into the reactor, and dehydrate for 1 hour at a temperature of 100°C, a pressure of -0.05MPa, and a stirring rate of 20 rpm. ; After cooling down to 45°C, add 30g of aromatic isocyanate (diphenylmethane diisocyanate), react at 65°C for 0.2 hours, then add 10g of cycloaliphatic isocyanate (1.4-cyclohexane diisocyanate), at 80°C React for 0.2 hours; then add 5g of 1,4-butanediol and 5g of polyoxyethylene polyoxypropylene polyether at 80°C, stir evenly, pour into the mold, put it into a flat vulcanizing machine, and vulcanize at 130°C for 0.2 hours , Put it in an oven at 80°C for 5 hours to vulcanize.

Embodiment 2

[0027] Taking the total weight of 100g as an example, first add 45g of polyε-caprolactone polyol into the reactor, and dehydrate for 1 hour at a temperature of 100°C, a pressure of -0.05MPa, and a stirring rate of 20 rpm; After cooling down to 45°C, add 30g of aromatic isocyanate (as naphthalene diisocyanate), react at 65°C for 0.2 hours, then add 10g of cycloaliphatic isocyanate (as cyclohexane dimethylene diisocyanate), react at 80°C for 0.2 hours; then add 10g of 1,4-butanediol and 5g of polyoxyethylene polyoxypropylene polyether at 80°C, stir evenly, pour into the mold, put it into a flat vulcanizer, vulcanize at 130°C for 0.2 hours, put Vulcanize in an oven at 80°C for 5 hours.

Embodiment 3

[0029] Taking the total weight of 100g as an example, first add 45g of polyε-caprolactone polyol into the reactor, and dehydrate for 1 hour at a temperature of 100°C, a pressure of -0.05MPa, and a stirring rate of 20 rpm; After cooling down to 45°C, add 30g of aromatic isocyanate (p-phenylene diisocyanate), react at 65°C for 0.2 hours, then add 10g of cycloaliphatic isocyanate (norbornane diisocyanate), react at 80°C for 0.2 hours; then Add 10g of 1,4-butanediol and 5g of polyoxyethylene polyoxypropylene polyether at 80°C, stir evenly, pour into the mold, put it into a flat vulcanizing machine and vulcanize at 130°C for 0.2 hours, put it in a 80°C Oven vulcanization for 5 hours.

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Abstract

The invention discloses a high-performance polyurethane sealing material for large-scale equipment. The high-performance polyurethane sealing material for the large-scale equipment comprises the following components in percentage by weight: 10 to 40 percent of aromatic isocyanate, 10 to 40 percent of cyclic aliphatic isocyanate, 20 to 50 percent of poly-epsilon-caprolactone polyol, 5 to 10 percent of 1,4-butanediol and 5 to 10 percent of polyoxyethylene polyoxypropylene polyether, wherein the aromatic isocyanate is one or more of diphenyl methane diisocyanate, naphthalene diisocyanate and paraphenyl diisocyanate; and the cyclic aliphatic isocyanate is one or more of 1,4-cyclohexane diisocyanate, cyclohexane dimethylene diisocyanate and norbornane diisocyanate. The high temperature resistance, impact resistance, yellowing resistance, solvent resistance and optical stability of the polyurethane sealing material can be improved. The high-performance sealing material for the large-scale equipment can be obtained. The invention also discloses a preparation method for the high-performance polyurethane sealing material for the large-scale equipment.

Description

technical field [0001] The invention relates to a polyurethane sealing material, in particular to a high-performance polyurethane sealing material for large equipment. The invention also relates to a preparation method of high-performance polyurethane sealing material for large-scale equipment. Background technique [0002] The rapid development of China's economy has led to the rapid development of the large-scale manufacturing equipment industry. In the "Twelfth Five-Year Plan" of the machinery industry, the task of developing large-scale manufacturing equipment and its important accessories has been clearly stated. Among them, the polyurethane hydraulic sealing ring with good sealing effect, small frictional resistance, wear resistance and long service life is one of the very important key accessories in large-scale manufacturing equipment, and its performance is very important to ensure that various large-scale manufacturing equipment (such as injection molding machines)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/75C08G18/66C08G18/42C08G18/48C08J3/24C09K3/10
Inventor 奚为民候琳熙
Owner ZHEJIANG XIPULI SEALING TECH
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