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Method for preparing aromatic polyester polyol with good pentane compatibility

An aromatic polyester and polyol technology, applied in the field of foaming agents, can solve problems such as poor compatibility of premixed pentane and aromatic polyester polyol, and achieve low cost, convenient operation, and easy mass production. Effect

Pending Publication Date: 2020-11-27
江苏德励达新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyurethane rigid foam is widely used in thermal insulation materials. In the application scenarios that require high flame retardancy, aromatic polyester polyols are widely used. Traditionally, the foaming agent is 141B. Due to the pressure of environmental protection, pentane foaming It is used to replace 141B and other blowing agents, but the compatibility between pentane blowing agents and aromatic polyester polyols is extremely poor. Generally, aromatic polyester polyols cannot be used in pre-mixed pentane systems. It is suitable for on-line mixing scenarios, but a considerable number of manufacturers require pre-mixed blowing agent products due to equipment limitations. Therefore, the existing aromatic polyester polyols cannot meet people's use requirements. Therefore, we propose A method for preparing aromatic polyester polyol with good pentane compatibility

Method used

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  • Method for preparing aromatic polyester polyol with good pentane compatibility
  • Method for preparing aromatic polyester polyol with good pentane compatibility
  • Method for preparing aromatic polyester polyol with good pentane compatibility

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Connect a water separator, agitator, condenser, thermometer and an electric heater to a 1.5L 4-necked flask, add 70g glycerin, 450g dipropylene glycol, 150g stearic acid, 350g phthalic anhydride and 0.2g T9, and heat up to 150°C after nitrogen replacement Carry out esterification reaction, cool down to 130 DEG C after 5 hours and vacuumize for 3 hours, cool down and discharge, and obtain a brown-yellow transparent product. The brown-yellow transparent product is tested, and the hydroxyl value test result is 220 mgKOH / g, and the viscosity is 9000 cps (25 DEG C).

Embodiment 2

[0021] Connect a water separator, stirrer, condenser, thermometer and electric heater to a 1.5L 4-necked flask, add 70g glycerin, 450g dipropylene glycol, 100g palmitic acid, 350g phthalic anhydride and 0.2g T9, and heat up to 150°C after nitrogen replacement Carry out esterification reaction, after 5 hours, cool down to 130°C and apply vacuum for 3 hours, then cool down and discharge to obtain a brownish-yellow transparent product with a hydroxyl value test result of 250mgKOH / g and a viscosity of 12000cps (25°C).

Embodiment 3

[0023] Connect a water separator, agitator, condenser, thermometer and an electric heater to a 1.5L 4-necked flask, add 70g glycerin, 400g dipropylene glycol, 200g oleic acid, 350g phthalic anhydride and 0.2g T9, and heat up to 150°C after nitrogen replacement After 5 hours of esterification reaction, the temperature was lowered to 130°C for 3 hours, the temperature was lowered and the material was discharged to obtain a brownish-yellow transparent product with a hydroxyl value test result of 170mgKOH / g and a viscosity of 13000cps (25°C).

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Abstract

The invention discloses a method for preparing aromatic polyester polyol with good pentane compatibility. The method comprises the following steps of: putting raw materials for synthesizing the aromatic polyester polyol into reaction equipment for nitrogen replacement; raising the temperature of the reaction equipment, so that the aromatic polyester polyol raw material is subjected to an esterification reaction; vacuumizing the reaction equipment, and then cooling and discharging to obtain the aromatic polyester polyol. The invention relates to a method for preparing aromatic polyester polyolwith good pentane compatibility. The aromatic polyester polyol prepared by the preparation method disclosed by the invention has good pentane compatibility, can be used for the combined polyester polyol of a premixed pentane system and a polyurethane rigid foam system with high requirements on flame retardance; the whole method for preparing the aromatic polyester polyol with good pentane compatibility is simple, has a better using effect compared with a traditional mode, is low in cost, can facilitate large-scale production for people, and brings a better using prospect.

Description

technical field [0001] The invention relates to the field of foaming agents, in particular to a method for preparing aromatic polyester polyols with good pentane compatibility. Background technique [0002] Polyurethane rigid foam is widely used in thermal insulation materials. In the application scenarios that require high flame retardancy, aromatic polyester polyols are widely used. Traditionally, the foaming agent is 141B. Due to the pressure of environmental protection, pentane foaming It is used to replace 141B and other blowing agents, but the compatibility between pentane blowing agents and aromatic polyester polyols is extremely poor. Generally, aromatic polyester polyols cannot be used in pre-mixed pentane systems. It is suitable for on-line mixing scenarios, but a considerable number of manufacturers require pre-mixed blowing agent products due to equipment limitations. Therefore, the existing aromatic polyester polyols cannot meet people's use requirements. Theref...

Claims

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Application Information

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IPC IPC(8): C08G63/672C08G63/183C08G63/21C08G63/78C08G18/42C08G18/68C08J9/14C08L75/06C08L75/14C08G101/00
CPCC08G63/672C08G63/183C08G63/21C08G63/78C08G18/425C08G18/4219C08G18/683C08J9/141C08J2375/06C08J2375/14
Inventor 王华
Owner 江苏德励达新材料股份有限公司
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