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Preparation method of polyether polyol containing foaming agent for rigid foam

A technology of polyether polyol and foaming agent is applied in the field of preparation of polyether polyol to achieve the effects of high reactivity, fast curing speed, and solving difficulties in transportation and storage

Active Publication Date: 2014-04-16
JIANGSU YINGTIAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, methyl formate is a flammable and explosive product, so it is necessary to find a better transportation and use method to realize its application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 500g of glycerin and 3000g of sucrose to the polyether reactor respectively, replace it with nitrogen for 3 times, then add 31.5g of KOH after depressurizing the reactor to above -0.098MPa, gradually put 6000g of propylene oxide into the reactor, and make the reactor The pressure is always maintained between 0.2MPa, slowly raise the temperature to 90°C, react for 1h, continue to heat up to 110°C, and keep warm for 3h before adding a mixture of 500g propylene oxide and 500g ethylene oxide; wait until the pressure drops to -0.04MPa After that, vacuumize for 1 hour, and maintain the pressure and temperature at -0.095MPa and 105°C respectively; when the temperature drops to 80°C, add 400g of deionized water, stir for 0.5h, then throw in 66g of phosphoric acid solution, continue the reaction for 0.5h, and add 31.5g of silicon Magnesium aluminum acid, after 0.5h, nitrogen gas is introduced and vacuum is applied, the pressure and temperature are maintained at -0.095MPa and ...

Embodiment 2

[0021] Add 1000g of glycerin and 2000g of sucrose to the polyether reactor respectively, replace it with nitrogen 4 times, then add 26.5g of KOH after depressurizing the reactor to above -0.098MPa, gradually put 6400g of propylene oxide into the reactor, and make the reactor Keep the pressure at 0.3MPa, slowly raise the temperature to 100°C, react for 0.5h, continue to raise the temperature to 115°C, keep warm for 2h, then add a mixture of 600g propylene oxide and 600g ethylene oxide; wait until the pressure drops to - Below 0.04MPa, vacuumize for 1h, maintain the pressure and temperature at -0.095MPa and 105°C respectively; when the temperature drops to 80°C, add 350g of deionized water, stir for 0.5h, then throw in 57g of phosphoric acid solution, continue the reaction for 0.5h, add 26.5 g magnesium aluminum silicate, after 0.5h, feed nitrogen and vacuumize, maintain the pressure and temperature at -0.095MPa and 110°C respectively, cool to below 85°C after 2h, press and filte...

Embodiment 3

[0023] Add 800g of glycerin and 2500g of sucrose to the polyether reactor, replace it with nitrogen for 3 times, then add 30g of KOH after depressurizing the reactor to above -0.098MPa, gradually put 5900g of propylene oxide into the reactor, and keep the pressure of the reactor Maintain between 0.4MPa, slowly raise the temperature to 95°C, react for 1h, continue to raise the temperature to 115°C, and keep warm for 2h before adding a mixture of 800g propylene oxide and 800g ethylene oxide; when the pressure drops below -0.04MPa, Vacuumize for 1 hour, maintain the pressure and temperature at -0.095MPa and 105°C respectively; when the temperature drops to 80°C, add 400g of deionized water, stir for 0.5h, then add 54g of phosphoric acid solution, continue the reaction for 0.5h, and add 30g of magnesium aluminum silicate After 0.5h, nitrogen gas was introduced and vacuum was applied, and the pressure and temperature were maintained at -0.095MPa and 110°C respectively. After 2.5h, i...

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PUM

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Abstract

The invention discloses a preparation method of polyether polyol containing a foaming agent for rigid foam. The preparation method comprises the following steps: putting an initiator into a polyether reaction still; feeding a catalyst after pressure reduction; feeding part of epoxypropare step by step; raising temperature slowly; reacting for 0.5-1 hour; preserving heat for 2-3 hours; adding the mixture of epoxypropare and ethane epoxide; when the pressure drops to be lower than -0.04 MPa, vacuumizing for 1 hour; when the temperature drops to 80 DEG C, adding water, stirring and feeding into a phosphoric acid solution for reaction; adding a refining agent; 0.5 hour later, pumping nitrogen gas and vacuumizing; 2-3 hours later, reducing lowering the temperature to be lower than 85 DEG C for filter pressing and discharging to obtain the polyether polyol for rigid foam. The mixture of epoxypropare and ethane epoxide is adopted as a polyether sealing terminal agent, so that the prepared polyether polyol is higher in reactivity, and better in demoulding capability; meanwhile, the foaming agent Ecomate is mixed into the polyether polyol for transport and sell, the product is more safe and environment-friendly.

Description

technical field [0001] The invention relates to a preparation method of polyether polyol, in particular to a preparation method of polyether polyol for hard foam containing foaming agent. Background technique [0002] Polyether polyol is the main raw material for the production of rigid polyurethane foam. Its preparation method is to polymerize the initiator with active hydrogen and epoxide under certain pressure, temperature and catalyst. Commonly used starters are glycerin, propylene glycol, pentaerythritol, trimethylolethane, sorbitol, mannitol, sucrose, and amine compounds, such as ethylenediamine; the epoxide is usually propylene oxide. For example, the starter used in the production of sucrose polyether polyols is mixed starters such as glycerol and sucrose, triethanolamine, ethylenediamine, toluenediamine and sucrose, diethanolamine and sucrose. However, the activity of polyether polyols terminated with propylene oxide is relatively small, and the release property is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/00C08G65/28C08G18/48
Inventor 杨水清蒋文俊王荣华陈玉龙罗伟
Owner JIANGSU YINGTIAN CHEM
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