Preparation method of polyether polyol for super-soft slow-rebound foam

A polyether polyol and slow rebound technology, which is applied in the field of preparation of polyether polyol for super soft and slow rebound foam, can solve the problems of inability to improve foam softness and low compression residue, and achieve low compression permanent deformation, The effect of fewer side reaction products and excellent physical properties

Pending Publication Date: 2021-05-07
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese invention patent CN201510834917.6 discloses a preparation method of slow-rebound polyether polyol, which has low compression residue and good physical properties, but it belongs to low-molecular-weight slow-rebound polyether, which cannot improve the softness of foam

Method used

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  • Preparation method of polyether polyol for super-soft slow-rebound foam
  • Preparation method of polyether polyol for super-soft slow-rebound foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 92g of glycerin, 182g of sorbitol, and 40g of potassium hydroxide to the pressure-resistant reaction kettle, replace with nitrogen to make the oxygen content in the kettle less than 50ppm, and then add 431g of propylene oxide and 1295g of ethylene oxide at a temperature of 108-112°C Carry out a preliminary polymerization reaction, and after the reaction is completed, continue the internal pressure reaction for 3 hours to fully react the added propylene oxide and ethylene oxide, remove unreacted monomers, and obtain the intermediate polyether polyol.

[0028] Add 202g of intermediate polyether polyol and 2.0g of phosphazene catalyst into a pressure-resistant reaction kettle and mix them, replace with nitrogen to make the oxygen content in the kettle less than 50ppm, and blow with nitrogen at a temperature of 93-95°C and a vacuum of less than -0.09MPa Bubble timer 2h. Feed 434g of propylene oxide and 1303g of ethylene oxide in proportion at a temperature of 113-117°C ...

Embodiment 2

[0031] Add 110g of glycerin, 146g of sorbitol, and 24g of potassium hydroxide to the pressure-resistant reaction kettle, replace with nitrogen to make the oxygen content in the kettle less than 50ppm, and then add 436g of propylene oxide and 1308g of ethylene oxide at a temperature of 108-110°C Carry out a preliminary polymerization reaction, and after the reaction is completed, continue the internal pressure reaction for 3 hours to fully react the added propylene oxide and ethylene oxide, remove unreacted monomers, and obtain the intermediate polyether polyol.

[0032] Add 202g of the intermediate polyether polyol and 2.2g of the phosphazene catalyst into a pressure-resistant reactor and mix them, and replace them with nitrogen so that the oxygen content in the reactor is less than 50ppm. Bubble timer 2h. Feed 472g of propylene oxide and 1416g of ethylene oxide in proportion at a temperature of 113-117°C for copolymerization reaction, continue the internal pressure reaction f...

Embodiment 3

[0035] Add 147g of glycerin, 73g of sorbitol, and 30g of potassium hydroxide to the pressure-resistant reaction kettle, replace with nitrogen to make the oxygen content in the kettle less than 50ppm, and then add 445g of propylene oxide and 1335g of ethylene oxide at a temperature of 108-110°C Carry out a preliminary polymerization reaction, and after the reaction is completed, continue the internal pressure reaction for 3 hours to fully react the added propylene oxide and ethylene oxide, remove unreacted monomers, and obtain the intermediate polyether polyol.

[0036] Add 202g of intermediate polyether polyol and 2.4g of phosphazene catalyst into a pressure-resistant reaction kettle and mix them, replace with nitrogen to make the oxygen content in the kettle less than 50ppm, and blow with nitrogen at a temperature of 93-95°C and a vacuum of less than -0.09MPa Bubble timer 2h. Feed 508g of propylene oxide and 1522g of ethylene oxide in proportion at a temperature of 113-117°C ...

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Abstract

The invention belongs to the technical field of polyether polyol synthesis, and particularly relates to a preparation method of polyether polyol for super-soft slow-rebound foam. According to the invention, a phosphazene catalyst and alkali metal dual-catalysis system is applied to the field of slow-rebound polyether polyol, the slow-rebound polyether polyol with ultra-high molecular weight is synthesized, the hand feeling comfort of slow-rebound foam is improved, and the molecular structure of the polyether polyol is subjected to high-functionality design so that the compression permanent deformation resistance is improved. Compared with polyether synthesized by a traditional commercially available KOH catalytic process, the polyether polyol product is high in molecular weight, low in unsaturation degree and narrow in molecular weight distribution, and can be used for preparing a polyurethane slow-rebound foam material which is comfortable in hand feeling, excellent in physical property and low in permanent compression deformation.

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 supersoft and slow-rebound foam. Background technique [0002] Slow rebound memory foam, due to its unique shape memory, energy absorption, sound absorption, shock absorption and other functions, is widely used in household, bedding, auto parts, shoe materials, sports equipment, medical equipment, aerospace and other fields. With the development of related industries and the improvement of residents' living standards, consumers have higher and higher requirements for the softness and comfort of slow-rebound foam. As one of the main raw materials for polyurethane slow-rebound foam products, can polyether polyol meet the requirements of development? Demand becomes key. [0003] Increasing the molecular weight of polyether polyol is a good way to improve the comfort of slow-rebound foam. However, the main s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G18/48C08G101/00
CPCC08G65/2609C08G65/2648C08G65/2675C08G65/269C08G18/4841
Inventor 张德江户平峰王腾周玉波于腾飞
Owner SHANDONG INOV NEW MATERIALS CO LTD
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