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Solvent-resistant polyurethane elastomer and preparation method thereof

A polyurethane elastomer and solvent-resistant technology, applied in the field of polyurethane applications, can solve the problems of inconvenient operation, high toxicity, and human hazards, and achieve the effects of convenient operation, low vulcanization speed, and high production efficiency

Active Publication Date: 2020-04-14
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] TDI polyurethane has been widely used for a long time, but due to the low saturated vapor pressure of TDI, it is volatile and highly toxic, causing great harm to people during production and processing.
The MDI type two-component BDO system has been widely used, but the viscosity of the two-component BDO system is relatively high during use, and the operation is inconvenient, and there are certain limitations in the use process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Described solvent-resistant polyurethane elastomer, component is as follows:

[0039] Component A: Dehydrate PE-560 at a temperature of 100°C and a vacuum of 0.095MPa to a moisture content of ≤0.03% to obtain component A.

[0040] Component B: 50% of MDI-100, 50% of liquefied MDI, vacuum (-0.095MPa) to remove air bubbles to obtain Component B with an isocyanate content of 31.5%.

[0041] Component C: HQEE 95.2% with moisture content ≤ 0.03%, mercury catalyst 4.8%, mix well to obtain component C.

[0042] The preparation method is as follows:

[0043] The temperature of component B is controlled at 40°C, the temperature of component C is 100°C, and the temperature of component A is 95°C. The components A, B, and C are controlled according to the quality of A:B:C=100:25:8 After mixing evenly in proportion, pour it into a mold at 90°C, open the mold for 30 minutes, and post-vulcanize at 100°C for 16 hours to obtain a polyurethane elastomer with a hardness of Shore 80A. ...

Embodiment 2

[0045] Described solvent-resistant polyurethane elastomer, component is as follows:

[0046] Component A: Dehydrate PE-560 at a temperature of 100°C and a vacuum of 0.095MPa to a moisture content of ≤0.03% to obtain component A.

[0047] Component B: liquefied MDI, vacuum (-0.095MPa) to remove air bubbles to obtain component B with an isocyanate content of 29.4%.

[0048] Component C: HQEE75.1% with moisture content ≤0.03%, HER18.8%, amine catalyst 2.1%, mix well to get C component.

[0049] The preparation method is as follows:

[0050] The temperature of component B is controlled at 40°C, the temperature of component C is 100°C, and the temperature of component A is 95°C. The components A, B, and C are controlled according to the quality of A:B:C=100:25.2:6 After mixing evenly, pour it into a mold at 90°C, open the mold for 30 minutes, and post-vulcanize at 100°C for 16 hours to obtain a polyurethane elastomer with a hardness of Shore 75A.

Embodiment 3

[0052] Described solvent-resistant polyurethane elastomer, component is as follows:

[0053] Component A: Dehydrate PE-560 at a temperature of 100°C and a vacuum of 0.095MPa to a moisture content of ≤0.03% to obtain component A.

[0054] Component B: liquefied MDI, vacuum (-0.095MPa) to remove air bubbles to obtain component B with an isocyanate content of 29.4%.

[0055] Component C: HER91.3% with moisture content ≤0.03%, mercury catalyst 8.7%, mix well to obtain component C.

[0056] The preparation method is as follows:

[0057] The temperature of component B is controlled at 40°C, the temperature of component C is 100°C, and the temperature of component A is 95°C. The components A, B, and C are controlled according to the quality of A:B:C=100:23.8:4 After mixing evenly in proportion, pour it into a mold at 90°C, open the mold for 30 minutes, and post-vulcanize at 100°C for 16 hours to obtain a polyurethane elastomer with a hardness of Shore 65A.

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Abstract

Disclosed are a solvent resistant polyurethane elastomer and a preparation method thereof. The solvent resistant polyurethane elastomer is composed of a A component, a B component and a C component in a mass ratio of 100: 20-30: 3-15,wherein the A component is prepared by a polyester polyol through vacuum dehydration at 100-120℃, and the polyester polyol is a poly succinic acid polyester polyol containing glycol and diglycol; the mole percent of glycol in a total amount of glycol and diglycol is 50-80%; the B component is isocyanate; the C component is a curing agent component which is obtained by dehydrating alcohol-based chain extender and mixing with a catalyst. The solvent resistant polyurethane elastomer has low guarant viscosity, good operability, excellent solvent resistance, superior overall performance and environmental protection; and compared with the common polyurethane elastomer, the solvent resistant polyurethane elastomer has solvent resistance improved to a certain extent. Further provided is a simple preparation method of the solvent resistant polyurethane elastomer.

Description

technical field [0001] The invention belongs to the technical field of polyurethane application, and in particular relates to a solvent-resistant polyurethane elastomer and a preparation method thereof. Background technique [0002] Polyurethane elastomer, its elastic modulus is between rubber and plastic and has the excellent properties of both. Because of its outstanding advantages such as high strength, tear resistance, wear resistance, good flexural performance, oil resistance and chemical resistance, Therefore, it is widely used. There are many kinds of raw materials and various formulas for synthesizing polyurethane polyols. According to the classification of basic raw material components, they can be divided into polyester type, polyether type and polyolefin type. Various types of polyurethane elastomers adapt to different environments. In practical applications, since polyurethane products used in the printing and dyeing industry have been in contact with organic so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/32
CPCC08G18/3215C08G18/425C08G18/664
Inventor 刘兆阳李涛董良王加良高振胜
Owner SHANDONG INOV POLYURETHANE