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Solvent-resistant polyurethane elastomer and preparation method therefor

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

Active Publication Date: 2018-11-30
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

The invention belongs to the technical field of application of polyurethane and particularly relates to a solvent-resistant polyurethane elastomer and a preparation method therefor. The solvent-resistant polyurethane elastomer is prepared from a component A, a component B and a component C according to the mass ratio of 100: (20 to 30): (3 to 15), wherein the component A is prepared from polyesterpolyol through vacuum dehydration at the temperature of 100 DEG C to 120 DEG C, the polyester polyol is polysuccinate polyester polyol containing ethylene glycol and diethylene glycol, the ethylene glycol accounts for 50% to 80% (mole percent) of the total amount of the ethylene glycol and the diethylene glycol, the component B is isocyanate, and the component C is a curing agent ingredient and is obtained through dehydrating an alcohol type chain extender and then mixing the dehydrated alcohol type chain extender with a catalyst. The solvent-resistant polyurethane elastomer disclosed by theinvention is low in system viscosity, good in operability, good in solvent resistance and superior and environment-friendly in comprehensive performance, and compared with the ordinary polyurethane elastomers, the solvent resistance is improved to certain extent; and the invention simultaneously provides the easy and feasible preparation method.

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 Applications(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
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