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Preparation method of high-functionality polyether polyol

A polyether polyol, high-functionality technology, applied in the field of polyether polyol synthesis, can solve the problems of reaction uniformity, difficulty in initiation of initiator, non-uniform growth, etc. The result is a good effect and the effect of reducing the unsaturation value

Active Publication Date: 2020-03-17
SHANDONG BLUSR DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But no matter what the situation is, when the content of the high-functionality high-viscosity initiator is too high, there will be difficulty in the initiation of the initiator, and the reaction uniformity during the polymerization of propylene oxide and ethylene oxide will be affected.
[0005] As an initiator for the synthesis of polyether polyols, due to differences in functionality, molecular weight, viscosity, etc., the reactivity during the addition of alkylene oxides is also different, and the initiator with high functionality often has a relatively high viscosity. , when a high-functionality initiator is used for the preparation of polyether, it is often very difficult to initiate, and after initiation, it is very likely that a large proportion of olefins will be added to one or several branched chains, and cannot grow uniformly in the on all branches

Method used

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  • Preparation method of high-functionality polyether polyol

Examples

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Embodiment 1

[0026] Add 1,140 parts of liquid sorbitol, 240 parts of glycerin, and 18 parts of potassium hydroxide to a 5L stainless steel reactor, add 2,200 parts of propylene oxide to the storage tank, and the temperature is ≤40°C; start stirring the reactor, and replace it with nitrogen 2-3 times. Vacuumize, heat up to 110°C, and bubble nitrogen for 4 hours; add 2,200 parts of propylene oxide through the storage tank, the initiation time is about 5 hours, and the subsequent addition is completed in about 10 hours. The pressure is controlled at 0.1-0.4 MPa, the temperature is 110-115 Reaction 2h, obtain oligomer polyether polyol;

[0027] Add 190 parts of liquid sorbitol, 40 parts of glycerin, 215 parts of oligomer polyether polyols, and 4.5 parts of potassium hydroxide into a 5L stainless steel reactor, and add 3100 parts of propylene oxide into the storage tank at a temperature of ≤40°C; Start stirring, replace with nitrogen 2-3 times, vacuumize, raise the temperature to 110°C, and bub...

Embodiment 2

[0029] Add 570 parts of liquid sorbitol, 120 parts of glycerin, and 9 parts of potassium hydroxide into a 5L stainless steel reaction kettle, add 2200 parts of propylene oxide into the storage tank, and the temperature is ≤40°C; the reaction kettle is turned on and stirred, and the nitrogen gas is replaced 2-3 times. Vacuumize, heat up to 110°C, and bubble nitrogen for 4 hours; add 2,200 parts of propylene oxide through the storage tank, the initiation time is about 5 hours, and the subsequent addition is completed in about 10 hours. The pressure is controlled at 0.1-0.4 MPa, the temperature is 110-115 Reaction 2h, obtain oligomer polyether polyol;

[0030] Add 190 parts of liquid sorbitol, 40 parts of glycerin, 444 parts of oligomer polyether polyols, and 4.5 parts of potassium hydroxide into a 5L stainless steel reactor, and add 3100 parts of propylene oxide into the storage tank at a temperature of ≤40°C; Start stirring, replace with nitrogen 2-3 times, vacuumize, raise the...

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Abstract

The invention belongs to the technical field of polyether polyol synthesis, and particularly relates to a preparation method of high-functionality polyether polyol, wherein the preparation method comprises the following steps: (1) by using a high-functionality initiator or a mixed initiator containing the high-functionality initiator as an initiator, adding alkylene oxide under the action of a catalyst, and carrying out a polymerization reaction to obtain oligomer polyether polyol; and (2) adding an initiator which is the same as the initiator in the step (1), a catalyst and alkylene oxide into the oligomer polyether polyol obtained in the step (1), and carrying out a polymerization reaction to obtain the high-functionality polyether polyol. According to the invention, a step-by-step secondary feeding mode is adopted, the high-viscosity initiator system is diluted to a certain extent, the olefin oxide addition reaction is easier to start, the problems of long initiation time and non-uniform polymerization are solved, the unsaturated value index of a polyether polyol product is lower, the actual hydroxyl value of the product is closer to the theoretical hydroxyl value, and the product can meet higher use requirements.

Description

technical field [0001] The invention belongs to the technical field of polyether polyol synthesis, and in particular relates to a preparation method of high-functionality polyether polyol. Background technique [0002] Polyether polyol (PPG) and polymer polyol (POP) are important raw materials for polyurethane (PU) industry. Due to its excellent physical and mechanical properties and easy processability, polyurethane products have a wide variety of products and are widely used. The application fields involve automobiles, trains, ships, airplanes, aerospace, furniture, home appliances, construction, medicine and health, mining, water power, electric power, electronics, agriculture and other industries. [0003] The industrial production of general-purpose polyether polyols is generally based on anion-catalyzed ring-opening polymerization, usually using potassium hydroxide (or sodium hydroxide) or dimethylamine as a catalyst, and using small molecule polyols such as glycerin ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G18/48C08G101/00
CPCC08G65/2609C08G65/2696C08G18/4829C08G2101/00
Inventor 段燕芳郭辉贾世谦穆潇潇
Owner SHANDONG BLUSR DONGDA CHEM
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