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Preparation method of novel hard foam polyether polyol

A technology of polyether polyol and hard foam, which is applied in the field of polyether polyol synthesis, can solve problems such as hazardous operation, inconvenient, and harmful to human health, and achieve the effects of reduced dosage, sufficient reaction, and environmental protection

Inactive Publication Date: 2020-03-17
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this chemical has a pungent ammonia smell, which is harmful to human health to a certain extent. In addition, it is very easy to absorb moisture and carbon dioxide in the air, and it will solidify at low temperature. It is harmful and inconvenient to operate as a curing catalyst when preparing a combined polyether.
In addition, polyethylene polyamine is a strong alkaline substance and acid to form a salt, and the refined polymerization process needs to be post-treated with acid. Therefore, when polyethylene polyamine is used as a catalyst, it cannot be combined with the refined polyether polymerization process.

Method used

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  • Preparation method of novel hard foam polyether polyol
  • Preparation method of novel hard foam polyether polyol
  • Preparation method of novel hard foam polyether polyol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 480g of sucrose, 120g of diethylene glycol, 100g of water, 10g of dimethylamine and 130g of triethylenetetramine into a 5L polymerization reactor, and then punch and test the polymerization reactor to ensure good sealing, and perform nitrogen replacement 5 times , then evacuate to the minimum vacuum degree of -0.093MPa, set the temperature to 85°C and raise the temperature, start to add propylene oxide dropwise at 80°C, maintain the temperature at 80°C, until the amount of propylene oxide added is 146g, Stop feeding propylene oxide, and start aging for 2 hours at a temperature of 90°C, maintaining a pressure of 0.15 MPa. After curing, keep the vacuum pressure less than -0.088MPa until the sampling test result is 0.3%. Then add 15g of dimethylamine, stir evenly, raise the temperature to 110°C, start to add 805g of propylene oxide dropwise until the feeding is completed, maintain the pressure at 0.15MPa and mature for 2h, then add 10g of ethylenediamine and stir evenl...

Embodiment 2

[0031] 370g of solid sorbitol, 180g of glycerin, 90g of water, 13g of dimethylamine and 140g of tetraethylenepentamine were added to a 5L polymerization reactor, and then the polymerization reactor was stamped and tested to ensure good sealing, and nitrogen replacement was performed 5 times. Then evacuate to the minimum vacuum degree -0.093MPa, set the temperature to 85°C and heat up, start to add propylene oxide dropwise at 80°C, keep the temperature at 80°C, stop when the amount of propylene oxide added is 224g Add propylene oxide, and start aging for 2 hours at a temperature of 90°C and maintain a pressure of 0.15MPa. After curing, keep the vacuum pressure less than -0.088MPa until the sampling test result is 0.3%. Then add 17g of dimethylamine and stir evenly, raise the temperature to 110°C, start to drop 747g of propylene oxide until the end of feeding, maintain the pressure of 0.15MPa and mature for 2h, then add 10g of ethylenediamine and stir evenly, start to dropwise a...

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Abstract

Belonging to the technical field of polyether polyol synthesis, the invention particularly relates to a preparation method of novel hard foam polyether polyol. The preparation method includes the steps of: (1) adding a high-functionality initiator, a small molecular initiator, water, an amine catalyst and polyethylene polyamine into a reaction kettle, conducting nitrogen displacement, then controlling the temperature at 70-90DEG C, adding alkylene oxide for reaction, and conducting curing; (2) performing dehydration under a vacuum condition; (3) adding an amine catalyst, controlling the temperature at 105-130DEG C, adding alkylene oxide for reaction, and conducting curing; (4) adding an amine catalyst and alkylene oxide, and performing curing; and (5) carrying out vacuum pumping to removeunreacted polymerization monomers, thereby obtaining the product. The method provided by the invention has the characteristics of high production efficiency, good reaction activity and small residualamount of later polymerization monomers, and the compound amine catalyst and olefin oxide are subjected to polymerization reaction and retained in a polyether system, thus ensuring shortening of the curing time in the polyether foaming process, and meeting the foam application requirements for high strength and low dimensional change rate.

Description

technical field [0001] The invention belongs to the technical field of polyether polyol synthesis, and in particular relates to a preparation method of a novel rigid foam polyether polyol. Background technique [0002] Polyethylene polyamine is a joint product of ethylenediamine, diethylenetriamine, triethylenetetramine and tetraethylenepentamine. It is a kind of fine chemical with a wide range of uses. It is used in curing agents, preservatives, chelating agents, surface active It is involved in the production of agents and crosslinking agents, and occupies an important position in the industry. However, this chemical has a pungent ammonia smell, which is harmful to human health to a certain extent. In addition, it is very easy to absorb moisture and carbon dioxide in the air, and it will solidify at low temperature. It is harmful and inconvenient to operate as a curing catalyst when preparing a combined polyether. . In addition, polyethylene polyamine is a strong alkalin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G18/48C08G101/00
CPCC08G18/4829C08G18/4883C08G65/2609C08G65/2672C08G65/2696C08G2110/0025
Inventor 宁晓龙宋录武杨琦赵鹏刘秀青
Owner SHANDONG INOV NEW MATERIALS CO LTD
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