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Preparation method of polyether polyol for slow rebound foam

A polyether polyol and slow rebound technology, which is applied in the field of polyether polyol synthesis, can solve the problems of low production efficiency, slow foaming speed, and comfort of slow-rebound foam, so as to improve production efficiency and improve reaction speed. , the effect of improving surface dryness and comfort

Inactive Publication Date: 2015-10-07
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such polyether polyols have slow foaming speed in the production process, low production efficiency, and poor comfort of the slow rebound foam produced

Method used

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  • Preparation method of polyether polyol for slow rebound foam
  • Preparation method of polyether polyol for slow rebound foam
  • Preparation method of polyether polyol for slow rebound foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 46g glycerin and 6.7g potassium hydroxide to a 2.5L autoclave at room temperature, evacuate to -0.09MPa and replace with nitrogen for 3 times, start stirring and raise the temperature to 115°C, under a vacuum of -0.09MPa, Dehydration reaction was performed for 2 hours, and then 1874g of epoxides were added dropwise continuously. In this epoxides, ethylene oxide accounted for 1405.5g, and propylene oxide accounted for 468.5g. The internal pressure of the reaction kettle is ≤0.4MPa, the reaction temperature is 115°C, and the aging reaction is continued for 1 hour after the feeding is completed. Under the vacuum degree of -0.09MPa, the unreacted epoxy monomer is removed to obtain the intermediate polyether polyol.

[0024] Then raise the reaction temperature to 125°C, use nitrogen to raise the pressure in the reactor to 0.1MPa, and continuously add 660g of ethylene oxide dropwise to the intermediate polyether polyol for capping, the reaction pressure is 0.4MPa, and the...

Embodiment 2

[0026] Add 36.8g of glycerin and 6g of potassium hydroxide to a 2.5L autoclave at room temperature, evacuate to -0.09MPa and replace with nitrogen 4 times, start stirring and raise the temperature to 115°C, at a vacuum of -0.09MPa, Dehydration reaction was performed for 2 hours, and then 1664g of epoxides were added dropwise continuously. In this epoxides, ethylene oxide accounted for 1248g, and propylene oxide accounted for 416g. Under the pressure of ≤0.4MPa in the reaction kettle, the reaction temperature is 115°C, and the aging reaction is continued for 1 hour after the feeding is completed. Under the vacuum degree of -0.09MPa, the unreacted epoxy monomer is removed to obtain the intermediate polyether polyol.

[0027] Then raise the reaction temperature to 120°C, use nitrogen to raise the pressure in the reactor to 0.13MPa, and continuously drop 300g of ethylene oxide into the intermediate polyether polyol for capping, the reaction pressure is 0.4MPa, and the temperature ...

Embodiment 3

[0029] Add 27.6g glycerin and 4.95g potassium hydroxide to a 2.5L autoclave at room temperature, evacuate to -0.09MPa and replace with nitrogen 4 times, start stirring and raise the temperature to 115°C, under the vacuum degree of -0.09MPa , dehydration reaction for 2 hours, then continuously drip 1404g epoxide, in this epoxide, ethylene oxide accounts for 1053g, propylene oxide accounts for 351g. Under the pressure of ≤0.4MPa in the reaction kettle, the reaction temperature is 115°C, and the aging reaction is continued for 1 hour after the feeding is completed. Under the vacuum degree of -0.09MPa, the unreacted epoxy monomer is removed to obtain the intermediate polyether polyol.

[0030] Then the reaction temperature was raised to 125°C, and the pressure inside the reactor was raised to 0.13MPa with nitrogen, and 215g of ethylene oxide was continuously added dropwise to the intermediate polyether polyol for capping. The reaction pressure was 0.4MPa, and the temperature was 1...

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Abstract

Belonging to the technical field of polyether polyol synthesis, the invention specifically relates to a preparation method of polyether polyol for slow rebound foams. The method includes: using only glycerin as the initiator to react with epoxide, then conducting end-capping with ethylene oxide, and carrying out two-stage process to prepare polyether polyol. According to the invention, in the early stage of polymerization reaction, ethylene oxide accounts for 70-90% of the total mass of the epoxide, and the structure can improve the surface dry touch and comfort of the slow rebound foam product. In the later stage of polymerization reaction, ethylene oxide is added to conduct end-capping, thus improving the activity of polyether, improving the reaction speed during foaming, and improving the production efficiency.

Description

technical field [0001] The invention belongs to the technical field of polyether polyol synthesis, and in particular relates to a preparation method of polyether polyol for slow resilience foam. Background technique [0002] Slow rebound foam is a kind of polyurethane polymer with open cell structure. The material has special viscoelastic properties, which reflects very soft material properties and has strong impact energy absorption capacity. As it has been accepted by more and more people in recent years, consumers pay more and more attention to its comfort, and manufacturers can improve production efficiency. [0003] Slow rebound foam is a reactive polyurethane soft material made of isocyanate and polyether polyol as the main raw materials, with various additives. Therefore, the structure and quality of polyether polyol directly determine the application field and quality of slow rebound foam. Mechanical performance index. Traditional polyether polyols are mostly synth...

Claims

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Application Information

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IPC IPC(8): C08G65/28C08G18/48C08G101/00
Inventor 刘军王玉凌贞贞孙兆任周玉波
Owner SHANDONG INOV NEW MATERIALS CO LTD
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