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Reactive flame-retardant polyether polyol, polyurethane foam and synthesis method

A polyether polyol, reactive flame retardant technology, applied in the field of reactive flame retardant polyether polyol and its synthesis, and polyurethane foam, can solve problems such as product loss of advantages, poor flame retardant effect, and impact on polyurethane foam performance. , to achieve the effects of good mechanical properties, reduced product color value, and narrow molecular weight distribution

Inactive Publication Date: 2020-04-17
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method of adding flame retardants often affects the performance of the reacted polyurethane foam, making the product lose its own advantages, and the flame retardant effect is not good

Method used

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  • Reactive flame-retardant polyether polyol, polyurethane foam and synthesis method
  • Reactive flame-retardant polyether polyol, polyurethane foam and synthesis method
  • Reactive flame-retardant polyether polyol, polyurethane foam and synthesis method

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preparation example Construction

[0036] In a specific embodiment, the application provides a low unsaturation, high activity, high resilience flame retardant polyether polyol synthesis method, which is characterized in that it comprises the following steps:

[0037] (1) The mixture composed of hexamethylolmelamine and small molecule polyol compound is used as the initiator, potassium hydroxide is used as the catalyst, and the ethoxylation reaction is carried out with propylene oxide at a reaction temperature of 105-115°C, The pressure is 0.2-0.3Mpa, polyether polyol intermediate A is synthesized, the adsorbent is refined, and the material is discharged at 70°C;

[0038](2) Use polyether polyol intermediate A as the initiator, and use bimetallic (DMC) as the catalyst to undergo ethoxylation reaction with propylene oxide, and control the pressure inside the kettle to maintain a slight positive pressure (0-0.05Mpa) , the reaction temperature is 130±5°C, the pressure in the kettle is controlled to maintain 0.2-0....

Embodiment 1

[0058] (1) Add 234.21g of sorbitol and 2.7g of potassium hydroxide to a 2.5L stainless steel reaction kettle, replace with positive and negative nitrogen pressure for 3 times, raise the temperature to 110°C and start dehydration with nitrogen blowing for 2 hours, the pressure is -0.085Mpa, and then slowly add 1566g Propylene oxide, reaction temperature 105-115°C, reaction pressure 0.2-0.3Mpa, curing for 4 hours after feeding, curing temperature 105-115°C, curing pressure 0.2-0.3Mpa, nitrogen supplementary pressure during curing, pumping after curing Vacuum degassing for 0.5h, degassing temperature 100-110°C, pressure -0.101Mpa, lower the temperature to 70°C to obtain low molecular weight crude polyether polyol A1. During the post-refining treatment process, add phosphoric acid (modulate pH=4.5~5.5), 3.6g of magnesium silicate adsorbent, 54g of distilled water, vacuum dehydration and drying for 6h, drying temperature 100°C, moisture ≤0.03%, filter to remove slag, and obtain low ...

Embodiment 2

[0061] (1) Add 175.67g of sorbitol, 98.44g of hexamethylolmelamine, 2.7g of potassium hydroxide to a 2.5L stainless steel reaction kettle, replace it with positive and negative nitrogen pressure for 3 times, raise the temperature to 110°C and start dehydrating with nitrogen for 2 hours, and the pressure is -0.085 Mpa, then slowly add 1526g of propylene oxide, the reaction temperature is 105-115°C, the reaction pressure is 0.2-0.3Mpa, after feeding, it is matured for 4h, the curing temperature is 105-115°C, the curing pressure is 0.2-0.3Mpa, and nitrogen supplement is added during the curing After aging, vacuumize and degas for 0.5h. The degassing temperature is 100-110°C, the pressure is -0.101Mpa, and the temperature is lowered to 70°C to obtain low molecular weight crude polyether polyol A1. During the post-refining treatment process, add phosphoric acid (modulate pH=4.5~5.5), 3.6g of magnesium silicate adsorbent, 54g of distilled water, vacuum dehydration and drying for 6h, ...

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Abstract

The invention relates to a method for synthesizing a reactive flame-retardant polyether polyol, which comprises the following steps: (1) carrying out ethoxylation reaction on an initiator containing ahydroxyl-containing nitrogen-containing reactive flame retardant and a small molecular polyol compound and a first part of epoxypropane to synthesize a polyether polyol intermediate A; (2) carrying out ethoxylation reaction on the polyether polyol intermediate A and a second part of epoxypropane to synthesize a polyether polyol intermediate B; and (3) carrying out polymerization end-capping reaction on the polyether polyol intermediate B and ethylene oxide to obtain the reactive flame-retardant polyether polyol. The invention also relates to the reactive flame-retardant polyether polyol synthesized by the method. The invention also relates to polyurethane foam prepared from the reactive flame-retardant polyether polyol. The polyether polyol prepared in the invention has the advantages oflow unsaturation degree, high activity, large molecular weight and narrow molecular weight distribution, and the prepared polyether foam material has good resilience, tensile strength and other mechanical properties.

Description

technical field [0001] The application relates to the technical field of polymer material synthesis, in particular to a reactive flame-retardant polyether polyol and its synthesis method, and to a polyurethane foam made from the reactive flame-retardant polyether polyol. Background technique [0002] High activity and high resilience polyether polyols (PPG, EO-terminated) prepared with traditional alkali metal catalysts have disadvantages such as high unsaturation, wide molecular weight distribution, small molecular weight, and low viscosity. The high-resilience polyurethane foam material prepared by reacting with isocyanate and the like has corresponding disadvantages such as low tensile strength and low rebound rate. The polyether polyol (PPG) prepared by the bimetallic catalyst and the alkali metal catalyst catalyzed EO end-capping are used to obtain high activity and high resilience polyether polyol (PPG, EO end-capping) with low unsaturation, The advantages of large mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G18/50C08G101/00
CPCC08G65/263C08G65/2624C08G65/2609C08G18/5063C08G18/5024C08G2101/00
Inventor 方洇陆晨岳瑞丽黄斌
Owner SHANGHAI DONGDA CHEM
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