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Fire-retardant and high-functionality aromatic polyester polyol and preparation method and applications thereof

A high-functionality, flame-retardant polyester technology, applied in the field of high-functionality polyester polyol and its preparation, can solve the problem of poor compressive strength and dimensional stability of polyurethane foam, general compressive strength and dimensional stability, flame retardant polyol The problem of general flame retardant effect is to achieve the effect of good carbonization, improved performance and enhanced flame retardant performance.

Active Publication Date: 2013-10-23
WANHUA CHEM NINGBO RONGWEI POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestically produced polyester polyols are all difunctional products, but in order to meet the ever-increasing flame retardant requirements, a large amount of flame retardants need to be added to the polyurethane foam prepared with them, so the physical and mechanical properties of the material are often reduced. As time goes by, the flame retardant in the material will migrate and the flame retardant performance of the material will be reduced. Therefore, polyester polyol and flame retardant polyol are usually used to further improve the flame retardant performance of polyurethane foam. However, commonly used polyester polyols and flame retardant polyols often have the following problems:
[0004] 1. The flame retardant performance of ordinary polyester polyol is slightly better than that of polyether polyol, but it still cannot meet the ever-increasing flame retardant standards
[0005] 2. Compared with polyether polyol, the reactivity of polyester polyol itself is relatively low. Therefore, when polyester polyol is used as raw material, it is usually necessary to increase the amount of catalyst added in the formula
[0006] 3. The functionality of polyester polyol is mostly 2, and the compressive strength and dimensional stability of polyurethane foam prepared with it are poor
Common high-functionality polyester polyols usually use high-functionality polyether polyols as raw materials. Since the branch center is a carbon atom instead of a benzene ring, the polyurethane foam prepared with it has general compressive strength and dimensional stability, and its resistance Poor combustion performance
[0007] 4. The existing flame retardant polyols on the market have a general flame retardant effect, and it is difficult to meet the ever-increasing flame retardant standards

Method used

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  • Fire-retardant and high-functionality aromatic polyester polyol and preparation method and applications thereof
  • Fire-retardant and high-functionality aromatic polyester polyol and preparation method and applications thereof
  • Fire-retardant and high-functionality aromatic polyester polyol and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Weigh 400g (0.5mol) of halogen-containing aromatic polycarbonate polyol with a hydroxyl value of 140mgKOH / g prepared according to Example 4 in patent CN201210235747.6, N,N-bis(2-hydroxyethyl) Add 102g (0.4mol) of diethyl aminomethylphosphonate, 400g (3.78mol) of diethylene glycol, 299.5g (1.56mol) of trimellitic anhydride and 4.6g of catalyst tetrabutyl titanate into the reactor, and pass Nitrogen was added for protection, and then heating was started. After the temperature in the reaction kettle rose to 100°C, stirring was started, and the temperature was gradually raised to 120°C. The reaction was carried out at normal pressure, and the reaction was carried out at constant temperature for 2 hours. After the reaction, the material was uniform and transparent.

[0050] (2) Continue to heat up and feed nitrogen gas. When the temperature in the reactor reaches 150°C, water begins to evaporate. When the temperature rises to 200°C, keep warm and continue to react for 6 h...

Embodiment 2

[0053] (1) Weigh 800g (1mol) of halogen-containing aromatic polycarbonate polyol with a hydroxyl value of 140mgKOH / g in Example 4 of patent CN201210235747.6, N,N-bis(2-hydroxyethyl)aminomethylphosphine Add 51g (0.2mol) of diethyl diethylene glycol (0.2mol), 178g (1.68mol) of diethylene glycol, 184g (0.96mol) of trimellitic anhydride and 0.3g of catalyst tetraisopropyl titanate into the reaction kettle, and pass nitrogen gas for protection , and then began to heat up. After the temperature in the reactor rose to 100°C, stirring was started, and the temperature was gradually increased to 120°C. The reaction was carried out at normal pressure, and the reaction was carried out at constant temperature for 2 hours. After the reaction, the material was uniform and transparent.

[0054] (2) Continue to heat up and feed nitrogen gas. When the temperature in the reactor reaches 160°C, water begins to evaporate. When the temperature rises to 220°C, keep warm and continue to react for 11 h...

Embodiment 3

[0056] (1) Weigh 500g (0.53mol) of halogen-containing aromatic polycarbonate polyol with a hydroxyl value of 120mgKOH / g in Example 3 of patent CN201210235747.6, N,N-bis(2-hydroxyethyl)aminomethyl Add 199g (0.78mol) of diethyl phosphonate, 329g (3.1mol) of diethylene glycol, 588g (1.47mol) of maleopimaric anhydride and 1.6g of catalyst dibutyltin dilaurate into the reaction kettle, and pass into Nitrogen was used for protection, and then heating was started. After the temperature in the reactor rose to 100°C, stirring was started, and the temperature was gradually raised to 120°C. The reaction was carried out at normal pressure, and the reaction was carried out at constant temperature for 2 hours. After the reaction, the material was uniform and transparent.

[0057] (2) Continue to heat up and feed nitrogen gas. When the temperature in the reactor reaches 170°C, water begins to evaporate. When the temperature rises to 200°C, keep warm and continue to react for 8 hours. When the...

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Abstract

The invention provides a fire-retardant and high-functionality aromatic polyester polyol and a preparation method and applications thereof. Halogen-containing aromatic polycarbonate polyol, N,N-bi(2-hydroxyethyl)aminomethyl diethyl phosphoric acid and micro-molecular alcohol react with acid anhydride, which has three or more carboxyl groups, or acid in the presence of catalyst so as to obtain fire-retardant and high-functionality aromatic polyester polyol. The fire-retardant and high-functionality aromatic polyester polyol has an average functionality not small than 3, an average hydroxyl value between 140 and 260 mgKOH / g, an acid value smaller than 2 mgKOH / g, an average molecular weight in a range of 600 to 1300 g / mol, and a viscosity of 7000 to 14000 Pa.S / 25 DEG C. The polyester polyol has the advantages of simple synthesis technology and good compatibility with other polyether and polyester polyol. Polyurethane foam made of the polyester polyol has higher heat-stability and permanent fire-retardant ability, and is capable of being applied to the field of heat insulation in construction.

Description

technical field [0001] The present invention relates to a high-functionality polyester polyol which can be used for flame-retardant polyurethane materials and its preparation method and application, more specifically to a high-functionality aromatic flame-retardant polyester polyol and its preparation method, and its Application as polyol component in polyurethane foam. Background technique [0002] Polyurethane rigid foam is a polymer material with superior performance. It has the advantages of good heat insulation effect, high mechanical strength, electrical performance, chemical corrosion resistance and sound insulation effect. And many other engineering fields have an irreplaceable role for other materials, especially in building insulation. Due to the world's energy shortage and the continuous improvement of energy-saving goals, polyurethane rigid foam will be widely used as an insulation material with ideal performance. Its thermal conductivity is low, only 0.018~0.02...

Claims

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Application Information

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IPC IPC(8): C08G64/42C08G64/10C08G18/46C08G101/00
Inventor 鞠昌迅陈海波董龙跃袁银龙郭可银张少伟黎源
Owner WANHUA CHEM NINGBO RONGWEI POLYURETHANE
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