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High-functionality polyether polyol and preparation method thereof

A polyether polyol and high-functionality technology, which is applied in the field of polyether polyol preparation, can solve the problems of difficult direct reaction, low reaction rate, and potential safety hazards, so as to prevent Maillard reaction and avoid solid residues , the effect of eliminating the influence

Active Publication Date: 2020-12-11
WANHUA CHEMYANTAI RONGWEI POLYURETHANE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the difficulty of direct reaction, the initial pressure of the reaction is 0.4-0.7MPa, and the pressure is too high, indicating that the reaction vessel contains too much propylene oxide and the reaction rate is low. High pressure and high content of propylene oxide have greater safety risks. Hidden dangers, difficult to apply in industrial production

Method used

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  • High-functionality polyether polyol and preparation method thereof
  • High-functionality polyether polyol and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] In a 5L stainless steel autoclave (that is, a reaction kettle) equipped with a stirrer, a heating temperature control device, a cooling device, and a pressure sensor, add 685 g of sucrose, 80 g of glycerin, 20 g of water, 600 g of polyether polyol A, and 6 g of potassium hydroxide 1. N-methylimidazole 1g, start stirring, mix the reaction materials evenly, replace nitrogen 5 times, and vacuumize until the pressure is -0.09MPa;

[0048] Add 4 g of N-methylimidazole into propylene oxide, and mix evenly under nitrogen atmosphere to obtain propylene oxide material, which is set aside;

[0049] When the temperature of the reaction kettle rises to 100°C, start to add propylene oxide material dropwise, control the reaction temperature to 120°C, and control the pressure within 0.4MPa. After adding 2030g of propylene oxide dropwise, the feeding is completed, and it is matured at 120°C. Until the pressure remains constant within 10 minutes, then vacuumize to obtain the crude polye...

Embodiment 2

[0052] In a 5L stainless steel autoclave (that is, a reaction kettle) equipped with a stirrer, a heating temperature control device, a cooling device, and a pressure sensor, add 550 g of sorbitol, 530 g of polyether polyol B, and N,N-dimethylcyclohexane Amine 7.9g, start stirring, mix the reaction materials evenly, nitrogen replacement 5 times, vacuumize until the pressure is -0.09MPa;

[0053] Add 5.7 g of N,N-dimethylcyclohexylamine into propylene oxide, mix evenly under nitrogen atmosphere to obtain propylene oxide material, set aside;

[0054] When the temperature of the reaction kettle rises to 90°C, start to add the propylene oxide material dropwise, control the reaction temperature to 115°C, and control the pressure within 0.4MPa, after adding 1837g of propylene oxide dropwise, the feeding is completed, and it is matured at 120°C. Until the pressure remains constant within 10 minutes, the polyether polyol product is obtained by degassing.

[0055] The synthesized polye...

Embodiment 3

[0057] In a 5L stainless steel autoclave (that is, a reaction kettle) equipped with a stirrer, a heating temperature control device, a cooling device, and a pressure sensor, add 707 g of pentaerythritol, 77 g of polyether polyol C, and 3.5 g of N,N-dimethylcyclohexylamine g, nitrogen replacement 5 times, vacuumize to -0.09MPa, start stirring, and mix the reaction materials evenly;

[0058] Add 5.3 g of triethylamine into propylene oxide, and mix evenly under nitrogen atmosphere to obtain propylene oxide material, which is set aside;

[0059] When the temperature of the reaction kettle rises to 90°C, start to add the propylene oxide material dropwise, control the reaction temperature to 110°C, and control the pressure within 0.35MPa, add 1434g of propylene oxide dropwise and finish feeding, and mature at 115°C. Until the pressure remains constant within 10 minutes, the polyether polyol product is obtained by degassing.

[0060] The synthesized polyether polyol indicators are l...

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Abstract

The invention provides high-functionality polyether polyol and a preparation method thereof, which are beneficial to reducing or eliminating the influence of a low-functionality initiator on product production based on the preparation method provided by the invention. The invention provides a preparation method of high-functionality polyether polyol, which comprises the following steps: adding a polyether polyol solvent and an initiator into a reaction vessel, adding alkylene oxide into the reaction vessel in the presence of a catalyst, and carrying out ring-opening polymerization reaction onthe alkylene oxide and the initiator in an inert gas atmosphere to generate the high-functionality polyether polyol, the initiators include a high functionality initiator and optionally a low functionality initiator.

Description

technical field [0001] The invention relates to a preparation method of high-functionality polyether polyol, which belongs to the technical field of polyether polyol preparation. Background technique [0002] Polyurethane foam is widely used in refrigerators, cold chains, pipelines, construction and other industries due to its excellent thermal insulation properties. Polyether polyol is one of the indispensable raw materials for the production of polyurethane, and its composition directly affects the application performance of polyurethane foam. Because high-functional polyether polyols can produce high cross-linking degree with isocyanate, accelerate foam curing and foam has high strength and good dimensional stability, high-functionality polyether polyols play an important role in the combined polyether polyols. status. Commonly used high-functionality polyether polyol initiators are solid raw materials such as sucrose, sorbitol, and pentaerythritol. In order to meet pro...

Claims

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Application Information

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IPC IPC(8): C08G65/28
CPCC08G65/2606C08G65/2609C08G65/2648C08G65/2672C08G65/269C08G65/2696
Inventor 徐薇马爱勤蔡仲铭
Owner WANHUA CHEMYANTAI RONGWEI POLYURETHANE CO LTD
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