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Polyether ester polyhydric alcohol and using method thereof

A technology of polyether ester polyol and polyether polyol, which is applied in the field of polyether ester polyol, can solve the problems of poor hydrolysis resistance and poor mechanical properties, and achieve excellent hydrolysis resistance, excellent mechanical properties and high reactivity Effect

Inactive Publication Date: 2012-06-20
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyurethane elastomers are divided into polyester type and polyether type according to the different polyol raw materials used. The two types of polyurethane elastomer products have their own advantages and disadvantages. Polyester type polyurethane elastomers have excellent mechanical properties such as: tensile strength, Tear strength and oil resistance, etc., but due to the influence of high ester bonds in its structure, the hydrolysis resistance of the product is relatively poor; polyether polyurethane elastomers have the characteristics of ether bonds in the molecule, good hydrolysis resistance, but poor mechanical properties Relatively poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of polyether ester polyol: according to weight percentage, polyether polyol (DL-1000) 66.6% with molecular weight of 1000, ethylene glycol (EG) 11%, adipic acid (AA) 22.4%, add catalyst Add 50ppm of tetrabutyl titanate into the reaction kettle to heat, and protect it with nitrogen gas. When the temperature rises to 140°C, water will react. After 1 hour, raise the temperature to 230°C. After the water is discharged, keep it warm for 2 hours, and then use nitrogen bubbling technology to remove the moisture generated by polycondensation. When the acid value of polyether ester polyol is less than 0.6mgKOH / g, the moisture content is 0.05 % below, the product is qualified and begins to cool down and discharge to obtain polyether ester polyols with a number average molecular weight of 1500.

[0028] The use of polyether ester polyol: according to the weight percentage, take 81.2% of the polyether ester polyol prepared above, add 18.8% of diisocyanate (TDI-100), rea...

Embodiment 2

[0030] Preparation of polyether ester polyol: according to weight percentage, polyether polyol (DL-400) 26.7%, ethylene glycol (EG) 24.2%, adipic acid (AA) 49.1% with molecular weight of 400, add catalyst Add 50ppm of tetrabutyl titanate into the reaction kettle to heat, and protect it with nitrogen gas. When the temperature rises to 140°C, water will react. After 1 hour, raise the temperature to 220°C. After the water is discharged, keep it warm for 2 hours, and then use the nitrogen bubbling process to remove the moisture generated by polycondensation. When the acid value of the polyether ester polyol is less than 0.6mgKOH / g, the moisture content is When it is less than 0.05%, the product is qualified and begins to cool down and discharge to obtain a polyether ester polyol with a number average molecular weight of 1000.

[0031] The use of polyether ester polyol: according to the weight percentage, take 77.2% of the polyether ester polyol prepared above, add 22.8% of diisocy...

Embodiment 3

[0033] The preparation of polyether ester polyol: according to percentage by weight, the polyether polyol (DL-400) 20% that molecular weight is 400, diethylene glycol (DEG) 26.4%, adipic acid (AA) 53.6% , add catalyst tetrabutyl titanate 50ppm, add to the reaction kettle to heat, and pass nitrogen protection, when the temperature rises to 140°C, water will react, control the top temperature of the reflux tower at 100°C, and then slowly raise the temperature of the kettle to 180°C , keep warm for 2 hours, raise the temperature to 220°C, keep warm for 2 hours after the water is discharged, and then use nitrogen bubbling process to remove the moisture generated by polycondensation, when the acid value of polyether ester polyol is less than 0.6mgKOH / g, the moisture When the content is below 0.05%, the product is qualified and starts cooling and discharging to obtain a polyether ester polyol with a number average molecular weight of 2000.

[0034] The use of polyether ester polyol:...

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Abstract

The invention belongs to the technical field of chemical synthesis, and in particular relates to polyether ester polyhydric alcohol and a using method thereof. Epoxypropane polyether polyhydric alcohol with the molecular weight of 400-1,000, diacid and small molecular dihydric alcohol are subjected to condensation under certain conditions to form the polyether ester polyhydric alcohol with the molecular weight of 1,000-2,000. The new polyether ester polyhydric alcohol prepared by the method contains ester keys and ether keys, is blocked by primary hydroxyl groups, and has high reaction activity. Polyurethane elastomer products synthesized by using the polyether ester polyhydric alcohol have the characteristic of excellent mechanical properties of polyester polyurethane products, and also have the characteristic of excellent hydrolysis resistance of polyether polyurethane products.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a polyether ester polyol and a use method thereof. Background technique [0002] Polyurethane elastomer is a polymer synthetic material between plastic and rubber. It has excellent wear resistance, good mechanical strength, oil resistance, low temperature resistance, ozone aging resistance and other properties, so it is widely used in rubber rollers and oil seals. , Automobile tires and other fields. Polyurethane elastomers are divided into polyester type and polyether type according to the different polyol raw materials used. The two types of polyurethane elastomer products have their own advantages and disadvantages. Polyester type polyurethane elastomers have excellent mechanical properties such as: tensile strength, Tear strength and oil resistance, etc., but due to the influence of high ester bonds in its structure, the hydrolysis resistance of the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672C08G18/42C08G18/10C08L75/06
CPCC08G18/10C08G63/672C08G18/42C08G18/4252C08L75/06C08G18/3237
Inventor 陈海良刘兆阳马翠翠
Owner SHANDONG INOV POLYURETHANE
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