Preparation method of flame-retardant polyether glycol

A flame-retardant polyether and polyol technology, which is applied in the field of preparation of flame-retardant polyether polyols, can solve the problems of poor hydrolysis resistance stability and reduced catalytic activity, and achieve high hydrolysis resistance stability, lower viscosity, and facilitate engineering construction Effect

Inactive Publication Date: 2015-01-07
ZIBO DEXIN LIANBANG CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this phosphorus-containing polyether polyol has poor hydrolysis stability, and the acidic substances produced during

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Accurately weigh 150 g of tetrabromobisphenol A, 120 g of propylene glycol, and 1.65 g of KOH catalyst, and transfer them into a polymerization kettle.

[0016] (2) Start stirring, nitrogen replacement 3 times, slowly heat up to 80°C and mix well.

[0017] (3) Continue to heat up to 90° C., slowly drop in 42 g of propylene oxide and stop feeding.

[0018] (4) After the reaction starts to polymerize, the remaining 235 g of propylene oxide is added in a continuous feeding mode to prepare crude polyether. The reaction temperature is 90±5°C, the reaction is 20h, and the reaction pressure is 0.2MPa.

[0019] (5) Cool the crude polyether to 79°C, add water and phosphoric acid, and adjust the pH to 6.3.

[0020] (6) Activated carbon is added for adsorption, the temperature is raised to 90° C., nitrogen is pumped to remove water, and the finished polyether is obtained by circulating filtration.

[0021] The product yield is 86%.

[0022] Finished product indicators: hyd...

Embodiment 2

[0025] (1) Accurately weigh 200 g of tetrabromobisphenol A, 120 g of glycerin, and 2.0 g of KOH catalyst, and transfer them into a polymerization kettle.

[0026] (2) Start stirring, nitrogen replacement 3 times, slowly heat up to 90°C and mix well.

[0027] (3) Continue to heat up to 95°C, slowly drop in 45g of propylene oxide and stop feeding.

[0028] (4) After the reaction starts to polymerize, the remaining 255 g of propylene oxide is added in a continuous feed mode to obtain a crude polyether. The reaction temperature is 95±5°C, the reaction is 18h, and the reaction pressure is 0.2MPa.

[0029] (5) Cool down the crude polyether to 82°C, add water and phosphoric acid, and adjust the pH to 5.7.

[0030] (6) Activated carbon is added for adsorption, the temperature is raised to 90° C., nitrogen is pumped to remove water, and the finished polyether is obtained by circulating filtration.

[0031] The product yield is 88%.

[0032] Finished product indicators: hydroxyl val...

Embodiment 3

[0035] (1) Accurately weigh 100 g of tetrabromobisphenol A, 100 g of dipropylene glycol, and 1.16 g of KOH catalyst, and transfer them into a polymerization kettle.

[0036] (2) Start stirring, nitrogen replacement 3 times, slowly heat up to 80°C and mix well.

[0037] (3) Continue to heat up to 90° C., slowly drop in 5 g of epichlorohydrin, and then stop feeding.

[0038] (4) After the reaction starts to polymerize, the remaining 115 g of epichlorohydrin is added in a continuous feeding manner to prepare crude polyether. The reaction temperature is 85±5°C, the reaction is 16h, and the reaction pressure is 0.1MPa.

[0039] (5) Cool down the crude polyether to 79°C, add water and phosphoric acid, and adjust the pH to 6.7.

[0040] (6) Activated carbon is added for adsorption, the temperature is raised to 95° C., and the water is vacuumed with nitrogen, and the finished polyether is obtained by circulating filtration.

[0041] The product yield is 82%.

[0042] Finished prod...

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Abstract

The invention relates to a preparation method of flame-retardant polyether glycol and belongs to the technical field of modification of polyether glycol. The flame-retardant polyether glycol is prepared from raw materials in parts by weight as follows: 100-200 parts of tetrabromobisphenol A, 100-150 parts of an initiator, 1.0-2.0 parts of potassium hydroxide and 120-300 parts of epoxyalkane, wherein the initiator is glycerin, propylene glycol or dipropylene glycol. The method is scientific, reasonable, simple and easy to implement, and the prepared flame-retardant polyether glycol is high in hydrolysis-resistant stability and good in flame-retardant effect.

Description

technical field [0001] The invention relates to a preparation method of flame-retardant polyether polyol, which belongs to the technical field of modification of polyether polyol. Background technique [0002] There are two main types of flame retardant polyether polyols in the current market: additive type and reactive type. Additive flame retardant polyether is mainly used by adding inorganic flame retardants, halogen flame retardants, phosphorus flame retardants, nitrogen flame retardants, etc. to the polyether and mixing them uniformly. To a certain extent, the higher the flame retardant content in the foam, the better the flame retardant effect. However, flame retardants have adverse effects on certain properties of the product, such as reducing foam hardness and delaying foaming time. Therefore, under the premise of ensuring the physical properties of the foam, flame retardants should be used as little as possible to achieve the flame retardant effect. Reactive flam...

Claims

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Application Information

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IPC IPC(8): C08G65/28C08G65/30C08G18/50
Inventor 耿佃勇荆晓东邹瑞董伟
Owner ZIBO DEXIN LIANBANG CHEM IND
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