Preparation method of polyether polyol for all-water blown polyurethane foam capable of resisting high temperature of 220 DEG C

A technology of polyether polyol and full water foaming, which is applied in the field of preparation of polyether polyol for high temperature resistant full water foaming polyurethane at 220° C. problems such as high viscosity, to achieve the effect of stable product quality, low production cost and low volatility

Inactive Publication Date: 2014-10-08
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional rigid polyether polyols do not have the characteristics of high-temperature aging resistance, so when used to prepare high-temperature-resistant full-water rigid polyurethane foams, they often fail to meet the temperature-resistant requirements, and the use of a single polyether often results in excessive viscosity of the material. Poor manufacturability, must use complex polyether system to achieve lower viscosity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In a 5L autoclave equipped with a stirrer, a meter, a heating temperature control device, a cooling device (including an outer jacket and an inner coil) and a pressure sensor, add 272 g of pentaerythritol, 40.2 g of trimethylolpropane, and methyl o-phthalate Diamine 36.6g, potassium hydroxide 4.5g, lithium hydroxide 45mg, nitrogen replacement 5 times, add 75g propylene oxide, heat up and stir, and react at 85°C and pressure 0.4MPa for 2 hours. After that, the temperature was raised to 120°C, the pressure was controlled at 0.6MPa, and 875g of propylene oxide was divided into 8 batches and added successively. After the addition was completed, it was reacted for 4 hours, then matured for 3 hours, and then added phosphoric acid aqueous solution neutralizer to carry out neutralization reaction at 100°C 1 hour, the pH is 7, add 1.5g of magnesium silicate, 1.5g of aluminum silicate, after fully stirring for 20 minutes, dehydrate under the vacuum degree of -0.07Mpa for 2.5 hours...

Embodiment 2

[0033] In a 5L autoclave equipped with a stirrer, a meter, a heating temperature control device, a cooling device (including an outer jacket and an inner coil) and a pressure sensor, add 272 g of pentaerythritol, 40.2 g of trimethylolpropane, and methyl o-phthalate Diamine 36.6g, potassium hydroxide 4.5g, lithium hydroxide 45mg, nitrogen replacement 3 times, add 80g propylene oxide, heat up and stir, react at 80°C, pressure 0.1MPa for 2 hours. After that, the temperature was raised to 110°C, the pressure was controlled at 0.3MPa, and the remaining 1020g of propylene oxide was divided into 10 batches and added successively. After the addition was completed, it was reacted for 8 hours, then aged for 1.5 hours, and then neutralized by adding phosphoric acid aqueous solution neutralizer at 85°C React for 1 hour, pH is 5, add 2.3g of magnesium silicate, 2.3g of aluminum silicate, after fully stirring for 20 minutes, dehydrate for 3 hours under the vacuum degree of -0.05Mpa, then fil...

Embodiment 3

[0041] In a 5L autoclave equipped with a stirrer, a meter, a heating temperature control device, a cooling device (including an outer jacket and an inner coil) and a pressure sensor, add 272 g of pentaerythritol, 40.2 g of trimethylolpropane, and methyl o-phthalate Diamine 36.6g, potassium hydroxide 4.5g, lithium hydroxide 45mg, nitrogen replacement 4 times, add 80g propylene oxide, heat up and stir, react at 82°C, pressure 0.3MPa for 2 hours. After that, the temperature was raised to 115°C, and the pressure was controlled at 0.4MPa. The remaining 970g of propylene oxide was divided into 9 batches and added successively. After the addition was completed, it was reacted for 6 hours, then aged for 3.5 hours, and then neutralized by adding a phosphoric acid aqueous solution neutralizer at 95°C. React for 1 hour, pH is 6, add 2g of magnesium silicate, 2g of aluminum silicate, stir thoroughly for 20 minutes, dehydrate under vacuum degree of -0.06Mpa for 3 hours, then filter, add ant...

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Abstract

The invention relates to a preparation method of polyether polyol for all-water blown polyurethane foam capable of resisting high temperature of 220 DEG C, and belongs to the technical field of polyether polyol synthesis. The preparation method is as follows: carrying out ring-opening reaction by taking a compound initiator and epoxy propane as main raw materials, wherein the compound initiator is a mixture of pentaerythritol, trimethylolpropane and methyl o-phenylenediamine; neutralizing a polymerization product by phosphoric acid, adsorbing by a compound silicate adsorbent, dehydrating, filtering, adding a compound efficient antioxidant, and uniformly mixing to obtain polyether polyol for the all-water blown polyurethane foam capable of resisting high temperature of 220 DEG C. The polyether polyol has extremely good high-temperature resistance, has lower viscosity at the same time, and can be independently used as a main polyether for being applied to a high-temperature-resistant all-water blown polyurethane rigid foam system; the obtained foam is resistant to a high temperature of 220 DEG C, and can be completely used for thermal-insulation heat-insulation construction of high-temperature pipelines such as an overheated vapor pipeline and a hot oil pipeline.

Description

technical field [0001] The invention belongs to the technical field of polyether polyol synthesis, and in particular relates to a preparation method of polyether polyol for full water foaming polyurethane resistant to 220°C high temperature. Background technique [0002] Due to its excellent thermal insulation performance, extremely low moisture absorption and moisture resistance, and convenient molding performance, polyurethane foam has been widely used in the thermal insulation construction of various oil, gas, water and other pipelines. Most of the currently widely used rigid polyurethane foams use Freon, 141b and other foaming agents, which will be gradually replaced due to their destructive effect on the atmosphere. The all-water foaming system has become the most environmentally friendly foaming system because only carbon dioxide is generated during the foaming process. Due to the poor temperature resistance of general rigid polyurethane foam, its application in the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G18/48
Inventor 刘军宁晓龙马海晶孙兆仁刘延良
Owner SHANDONG INOV NEW MATERIALS CO LTD
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