A preparation process of polycarbonate-ether polyol and oil-resistant and low-temperature resistant polyurethane elastomer

A polyether polyol and preparation technology, applied in the preparation of polycarbonate-ether polyol, oil-resistant and low-temperature resistant polyurethane elastomer field, can solve the problems of poor low-temperature resistance and oil resistance, improve low-temperature resistance and ensure regularity properties, excellent reactivity

Active Publication Date: 2018-11-23
MIRACLL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the poor low temperature resistance of existing polycarbonate polyol products and the deficiencies in the oil resistance of polyether ester polyol products, the present invention provides a preparation process of polycarbonate-ether polyol and oil-resistant and low-temperature resistant polyurethane prepared based on it elastomer

Method used

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  • A preparation process of polycarbonate-ether polyol and oil-resistant and low-temperature resistant polyurethane elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of preparation technology of polycarbonate-ether polyol, comprises the steps:

[0031] 1) Add 315.78g of 1,4-butanediol, 525.60g of PTMG-600 and 1.01g of catalyst tetrabutyl titanate into a reactor equipped with a rectification device, and then start stirring and raise the temperature to At 90°C, use a peristaltic pump to continuously add a total of 493.36 g of dimethyl carbonate to the reaction system, and keep the temperature at 90°C for 1 hour during the continuous addition process;

[0032] 2) Then raise the temperature to 180°C within 4 hours, during which the temperature at the top of the rectification column is controlled not to exceed 65°C. After constant temperature reaction for 1 hour, add 3.15g of 1,4-butanediol to the reaction system, and stir for 1 hour;

[0033] 3) Afterwards, carry out de-end grouping and hydroxyl end-capping. When no distillate in the reaction system is evaporated, start the vacuum device, evacuate to -0.09Mpa, reduce the temperat...

Embodiment 2

[0039] A kind of preparation technology of polycarbonate-ether polyol, comprises the steps:

[0040] 1) Add 248.68g of 1,4-butanediol, 709.56g of PTMG-600 and 1.25g of catalyst tetrabutyl titanate into the reactor equipped with a rectification device, and then start stirring and raise the temperature to At 90°C, use a peristaltic pump to continuously add a total of 443.71 g of dimethyl carbonate to the reaction system, and keep the temperature at 90°C for 1 hour during the continuous addition process;

[0041] 2) Then raise the temperature to 160°C within 4 hours, during which the temperature at the top of the rectification column is controlled not to exceed 65°C. After constant temperature reaction for 1 hour, add 2.48g of 1,4-butanediol to the reaction system, and stir for 1 hour;

[0042] 3) Afterwards, carry out de-end grouping and hydroxyl end-capping. When no distillate in the reaction system is evaporated, start the vacuum device, evacuate to -0.09Mpa, reduce the temper...

Embodiment 3

[0048] A kind of preparation technology of polycarbonate-ether polyol, comprises the steps:

[0049] 1) Add 204.97g of 1,5-pentanediol, 787.20g of PEG-600 and 1.26g of catalyst tetrabutyl titanate into a reactor equipped with a rectification device, and then start stirring and heat up to 90°C; use a peristaltic pump to continuously add a total of 369.52 g of dimethyl carbonate to the reaction system, and control the temperature at 90°C for 1 hour during the continuous addition process;

[0050] 2) Then raise the temperature to 180°C within 4 hours, during which the temperature at the top of the rectification column is controlled not to exceed 65°C. After constant temperature reaction for 1 hour, add 1.80g of 1,4-butanediol to the reaction system, and stir for 1 hour;

[0051] 3) Finally, carry out de-end grouping and hydroxyl end-capping. When there is no distillate in the reaction system, start the vacuum device, evacuate to -0.085Mpa, reduce the temperature and discharge the...

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Abstract

The present invention relates to a kind of preparation technology of polycarbonate-ether polyol, it is characterized in that, comprises the following steps: 1) the system that will contain the aliphatic dihydric alcohol of 8 carbon atoms, polyether polyol and reaction catalyst is heated up to Stir at 90-100°C, add organic carbonate to it at a constant flow rate in an inert atmosphere, and carry out transesterification at a constant temperature; Polyhydric alcohol, constant temperature reaction; 3) carry out constant temperature polycondensation after decompression to -0.085 to -0.09Mpa, to obtain final product. The polyurethane elastomer prepared based on the reaction between the polycarbonate-ether polyol and diisocyanate has excellent comprehensive properties such as oil resistance and low temperature resistance, and can broaden the application field of the polycarbonate polyurethane elastomer.

Description

technical field [0001] The invention relates to a preparation method of polycarbonate-ether polyol, which belongs to the technical field of organic synthesis. The invention also relates to the oil-resistant and low-temperature-resistant polyurethane elastomer obtained by using polycarbonate-ether polyol, which can be applied to the field of industrial products with strict requirements on cold-resistant and oil-resistant properties. Background technique [0002] Polycarbonate polyol refers to a class of polymers containing repeated carbonate groups in the main chain of the molecule, and the chain end groups are hydroxyl groups. Because the polycarbonate polyol molecular chain has greater flexibility, it can be used as a raw material for the synthesis of polyurethane soft segment. The polyurethane produced from it has excellent heat resistance, oxidation resistance and oil resistance, etc., and is ideal for preparing oil pipes. One of the most ideal materials for industrial p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G64/30C08G64/02C08G18/44C08G18/48C08G18/32C08G18/66C08G18/76
CPCC08G18/3206C08G18/44C08G18/4854C08G18/664C08G18/6674C08G18/7671C08G64/0208C08G64/305
Inventor 刘德富宋红玮由可锦张生王仁鸿
Owner MIRACLL CHEM
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