Synthesis method of flexible-foam flame-retardant polyether polyol

A technology of flame retardant polyether and synthesis method, which is applied in the synthesis field of flexible foam flame retardant polyether polyol, can solve the problems such as the decline of the physical and mechanical properties of foam collapsed foam, the insignificant flame retardant effect of flame retardants, and the loss of performance advantages. , to achieve the effect of high oxygen index, small physical and mechanical properties, and easy foaming

Active Publication Date: 2013-03-20
SHANDONG BLUSR DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The method of adding flame retardants often causes physical and mechanical properties such as foam collapse, cracking, pulverization, or rebounding to be greatly reduced, and loses its own performance advantages, and these flame retardants have no flame retardant effect when added alone Not obvious

Method used

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  • Synthesis method of flexible-foam flame-retardant polyether polyol
  • Synthesis method of flexible-foam flame-retardant polyether polyol

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Add 126g of melamine and 244g of formaldehyde solution with a mass fraction of 37% into a 5L stainless steel reaction kettle, pump in 5g of diethanolamine, react at 70°C for 3h, and obtain 216g of melamine-formaldehyde condensate; add 62g of ethylene glycol, and continue the reaction for 1h Finally, it was dehydrated under reduced pressure at 70°C to a moisture content of 5%. Raise the temperature to 80°C, start adding propylene oxide, keep the pressure in the kettle at 0.1-0.4MPa, and the temperature is 80-100°C, continuously add 716g of propylene oxide. Unreacted propylene oxide and water can obtain high hydroxyl value polyether with moisture content ≤ 0.01%, and its hydroxyl value is 426mgKOH / g.

[0026] Add 5.2g KOH to the reaction kettle, raise the temperature to 110°C, start adding propylene oxide, and continuously add 1570g propylene oxide to react to obtain crude polyether, which is neutralized and refined to obtain soft foam flame-retardant polyether polyol. T...

Embodiment 2

[0028] Add 126g of melamine and 244g of formaldehyde solution with a mass fraction of 37% into a 5L stainless steel reaction kettle, pump in 5g of tertiary amine, react at 70°C for 3h, and obtain 216g of melamine-formaldehyde condensate; add 134g of dipropylene glycol, and continue the reaction for 1h , Dehydration under reduced pressure at 70°C to a moisture content of 5%. Raise the temperature to 80°C, start to add ethylene oxide, keep the pressure in the kettle at 0.1-0.4MPa, and keep the temperature at 80-100°C, continuously add 396g of ethylene oxide. Press to remove unreacted ethylene oxide and water to obtain a high hydroxyl value polyether with a moisture content of ≤0.01%, and its hydroxyl value is 492 mgKOH / g.

[0029] Add 4.8g NaOH to the reaction kettle, raise the temperature to 110°C, start adding ethylene oxide, and continuously add 1210g ethylene oxide to react to obtain crude polyether, which is neutralized and refined to obtain soft foam flame-retardant polyet...

Embodiment 3

[0031] Add 126g of melamine and 244g of formaldehyde solution with a mass fraction of 37% into a 5L stainless steel reaction kettle, pump in 5g of triethylamine, and react at 70°C for 3h to obtain 216g of melamine-formaldehyde condensate; then add 92g of glycerol and continue the reaction for 1h , Dehydration under reduced pressure at 70°C to a moisture content of 5%. Raise the temperature to 80°C, start to add propylene oxide, keep the pressure in the kettle at 0.1-0.4MPa, and the temperature is 80-100°C, continuously add 522g of propylene oxide. After the feeding of propylene oxide is completed, the internal pressure will be reacted for 3 hours, and the pressure will be removed. The unreacted propylene oxide and water can obtain high hydroxyl value polyether with moisture content ≤ 0.01%, and its hydroxyl value is 558mgKOH / g.

[0032] Add 4.2 g CH to the reactor 3 ONa, heat up to 110°C, start to add propylene oxide, continuously add 1680g propylene oxide, react to get crude...

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Abstract

The invention relates to a synthesis method of flexible-foam flame-retardant polyether polyol, aiming at providing the synthesis method of the flexible-foam flame-retardant polyether polyol with good flame retardance, safety, no toxicity and low cost. The synthesis method comprises the following steps of: adopting a melamine-formaldehyde condensation compound and a polyol compound as a mixed initiator; firstly under the action of amine, carrying out polymerization with olefin oxide and obtaining high-hydroxyl-value polyether; and then under the action of alkali metal catalyst, adding the olefin oxide again for further polymerization and obtaining the flexible-foam flame-retardant polyether polyol. In the synthesis method, the preparation process is simple, the cost is low and the influence on the physical and mechanical performances is less. The flexible-foam flame-retardant polyether polyol prepared by the method is light in color and low in viscosity and can be widely used for preparing the flame-retardant flexible polyurethane foam. A prepared flame-retardant flexible polyurethane foam plastic product has the advantages of high oxygen index, good flame-retardant effect, high heat resistance, good size stability and high strength.

Description

technical field [0001] The invention relates to a method for synthesizing a soft foam flame-retardant polyether polyol, which can be used in the preparation of flame-retardant flexible polyurethane foam. Background technique [0002] In recent years, due to the excellent properties of polyurethane materials, my country's polyurethane industry has developed rapidly. Among them, flexible foam plastics, which account for a large part of polyurethane production, are light and soft, insulating, breathable, non-toxic, good in resilience, small in compression deformation, excellent in moisture resistance and aging resistance, and have oil resistance, organic solvent resistance, sound insulation and heat preservation. And many other excellent properties, it has been widely used in various fields and has a wide range of uses. But at the same time, flexible foam plastics are easy to be ignited and burned due to their small density and large specific surface area, and the burning prob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/26C08G65/28C08G18/48
Inventor 段燕芳
Owner SHANDONG BLUSR DONGDA CHEM
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