Aromatic polyester polyol for improving compatibility of hydrocarbon blowing agent and preparation method thereof

A technology of aromatic polyester and hydrocarbon foaming agent, applied in the field of polyester polyol and its preparation, can solve the problem of unsatisfactory compatibility between aromatic polyester polyol and compatibilizer, and aromatic polyester polyol and compatibilizer. It is difficult for the compatibilizer to form a clear and transparent mixture, etc., to achieve the effect of less intermediate steps, low cost, and improved compatibility of hydrocarbon blowing agents

Active Publication Date: 2011-07-06
ZHEJIANG HUAFON NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with this method is that the compatibility between the aromatic polyester polyol and the compatibilizer is not ideal, and it is difficult for the aromatic polyester polyol and the compatibilizer to form a clear and transparent mixture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 0.130kg of dimer acid, 5.363kg of phthalic anhydride, and 8.674kg of diethylene glycol into the reactor with a stirring blade, a condensation water separator, a nitrogen pipe leading into the bottom of the reactor, a thermometer and a heating jacket, At the same time, 0.4 g of tetraisopropyl titanate was added as a catalyst, and the temperature was gradually raised to 160° C., stirring continuously during the heating process to fully mix the components. Incubate at 160°C for 1 hour. Then the temperature is raised rapidly to 180°C, at which temperature a condensation reaction occurs, and some water is separated until the water output reaches 80% of the theoretical water output. Continue to raise the temperature to 200°C, and feed nitrogen gas from the bottom of the reaction kettle to control the flow of nitrogen gas so that the temperature in the condensation and water separation device is not higher than 100°C. The acid value and hydroxyl value were detected in rea...

Embodiment 2

[0024] Add 0.255kg of dimer acid, 5.108kg of phthalic anhydride, and 8.674kg of diethylene glycol into the reactor with a stirring blade, a condensation water separator, a nitrogen pipe leading into the bottom of the reactor, a thermometer and a heating jacket, At the same time, 0.4 g of tetraisopropyl titanate was added as a catalyst, and the temperature was gradually raised to 160° C., stirring continuously during the heating process to fully mix the components. Incubate at 160°C for 1 hour. Then the temperature is raised rapidly to 180°C, at which temperature a condensation reaction occurs, and some water is separated until the water output reaches 80% of the theoretical water output. Continue to raise the temperature to 200°C, and feed nitrogen gas from the bottom of the reaction kettle to control the flow of nitrogen gas so that the temperature in the condensation and water separation device is not higher than 100°C. The acid value and hydroxyl value were detected in rea...

Embodiment 3

[0026] Add 0.488kg of dimer acid, 4.875kg of phthalic anhydride, and 8.674kg of diethylene glycol into the reactor with a stirring blade, a condensation water separator, a nitrogen pipe leading to the bottom of the reactor, a thermometer and a heating jacket, At the same time, 0.4 g of tetraisopropyl titanate was added as a catalyst, and the temperature was gradually raised to 160° C., stirring continuously during the heating process to fully mix the components. Incubate at 160°C for 1 hour. Then the temperature is raised rapidly to 180°C, at which temperature a condensation reaction occurs, and some water is separated until the water output reaches 80% of the theoretical water output. Continue to raise the temperature to 200°C, and feed nitrogen gas from the bottom of the reaction kettle to control the flow of nitrogen gas so that the temperature in the condensation and water separation device is not higher than 100°C. The acid value and hydroxyl value were detected in real ...

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Abstract

The invention provides aromatic polyester polyol for improving compatibility of a hydrocarbon blowing agent in a hard polyurethane foam composite material. The aromatic polyester polyol is characterized in that: the aromatic polyester polyol chemically modified by fatty acid has the acid ester of less than 3.0mgKOH/g, and the hydroxyl value of 30-800mgKOH/g. Meanwhile, the invention provides a method for preparing the aromatic polyester polyol for improving the compatibility of the hydrocarbon blowing agent in the hard polyurethane foam composite material. The method is convenient to operate,and the product has stable properties.

Description

technical field [0001] The invention relates to a polyester polyol and a preparation method thereof, in particular to an aromatic polyester polyol for improving the compatibility of a hydrocarbon blowing agent in a rigid polyurethane foam composition and a preparation method thereof. Background technique [0002] Aromatic polyester polyols can be used to make polyurethane and polyisocyanurate foams. Polyurethane and polyisocyanurate foams are prepared by reacting polyisocyanates, aromatic polyester polyols, and blowing agents, such as hydrocarbons, water, or both, in the presence of polyurethane catalysts. [0003] Aromatic polyester polyols can generally be prepared from, for example, ethylene glycol and / or diethylene glycol and carboxylic acids and / or carboxylic acid derivatives such as phthalic anhydride, terephthalic acid. Polyurethane and polyisocyanurate foams prepared from aromatic polyesters have good flame retardancy, high bonding strength, and good thermal insulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672C08G63/181C08G18/42C08G101/00
Inventor 杜春毅李善军段伟东温文宪赵叶宝刘旭
Owner ZHEJIANG HUAFON NEW MATERIALS CO LTD
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