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Preparation method of polyether polyol for all-water flame-retardant system

A polyether polyol and system technology, applied in the field of polyether polyol preparation, can solve the problems of low mutual solubility of additives, low flame retardant performance and high viscosity

Active Publication Date: 2021-04-20
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most products on the market are limited by basic raw materials such as sucrose and sorbitol, and have high viscosity, low miscibility with additives, poor storage stability or low flame retardancy, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 94g melamine, 181g formaldehyde solution and 0.2g triethylamine catalyst into the reaction kettle. After the leak test and replacement of the kettle, the temperature is raised to 65±5℃ under nitrogen atmosphere, and the pressure of nitrogen atmosphere in the kettle is kept in the range of 0.12±0.02MPa. Within, react for 1h to prepare methylol melamine.

[0029] Take 146g of trishydroxyethyl isocyanurate and pump it into the reaction kettle under vacuum, add 10.2g of propylene glycol and 1g of triethylamine catalyst at the same time, stir and heat to 80°C, and start pre-dropping 65g of propylene oxide after reaching the temperature. After pre-dropping, raise the temperature to 110±5°C, start dehydration, and dehydrate by bubbling for 1.5h.

[0030] After the dehydration is completed, the temperature is raised to about 125±5°C. After reaching the temperature, continue to add propylene oxide dropwise, with a mass of 109g. During the dropwise addition, keep the temperat...

Embodiment 2

[0032] Add 94g melamine and 89.5g paraformaldehyde to the reaction kettle, and add 0.5g dimethylcyclohexylamine catalyst at the same time. After the leak test and replacement of the kettle, the temperature is raised to 65±5°C under nitrogen atmosphere, and the pressure of nitrogen atmosphere in the kettle is kept at Within the range of 0.12±0.02MPa, react for 1.5h to prepare methylol melamine.

[0033] Take 73g of trishydroxyethyl isocyanurate and pump it into the reaction kettle under vacuum, add 14.2g of diethylene glycol and 1g of triethylamine catalyst at the same time, stir and heat to 75°C, and start pre-dropping ethylene oxide after reaching the temperature 131.3 g. After pre-dropping, raise the temperature to 110±5°C, start dehydration, and dehydrate by bubbling for 2 hours.

[0034] After the dehydration is completed, the temperature is raised to about 125±5°C. After reaching the temperature, continue to add propylene oxide dropwise, with a mass of 116g. During the d...

Embodiment 3

[0036] Add 94g melamine and 120.9g formaldehyde solution to the reaction kettle, and add 0.3g dimethylcyclohexylamine catalyst at the same time. After the leak test and replacement of the kettle, the temperature is raised to 65±5°C under nitrogen atmosphere, and the pressure of nitrogen atmosphere in the kettle is maintained at 0.12 Within the range of ±0.02MPa, react for 1.5h to prepare methylol melamine.

[0037] Take 42g of trihydroxyethylisocyanurate and pump it into the reaction kettle under vacuum, add 28g of diethylene glycol and 0.7g of triethylamine catalyst at the same time, stir and heat to 75°C, and start pre-dropping ethylene oxide after reaching the temperature 88g. After pre-dropping, raise the temperature to 110±5°C, start dehydration, and dehydrate by bubbling for 2 hours.

[0038] After the dehydration is completed, raise the temperature to about 125±5°C, and continue to add propylene oxide dropwise after reaching the temperature, the mass is 58g, keep the t...

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PUM

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Abstract

The invention relates to a preparation method of polyether polyol for an all-water flame-retardant system, and belongs to the technical field of polyether polyol modification. According to the preparation method of the polyether polyol for the all-water flame-retardant system, trihydroxyethyl isocyanurate, hydroxymethyl melamine and small molecular alcohol are used as composite initiators and subjected to a polymerization reaction with alkylene oxide under the catalytic action of alkali, and the polyether polyol is obtained. The preparation method is scientific and reasonable in design, the cost is reduced, and the prepared polyether is low in viscosity, good in compatibility with water and auxiliaries and good in flame-retardant effect.

Description

technical field [0001] The invention relates to a preparation method of polyether polyol for an all-water flame-retardant system, and belongs to the technical field of polyether polyol modification. Background technique [0002] Full water rigid polyurethane foam uses water as the foaming agent and does not contain ozone-depleting substances. It is the most environmentally friendly type of polyurethane insulation material. The principle of water foaming is that water reacts with polyisocyanate to generate CO 2 , C0 2 Remains in the cells as a foam blowing agent. The ODP value of this system is zero, non-toxic, environmentally friendly, simple process, no special requirements for equipment, and low cost. It is one of the main directions for foaming agent replacement at present. [0003] The all-water foaming system has no physical foaming agent added, and polyether polyols with low viscosity and good miscibility with water and additives must be used. At present, most prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G18/50C08G101/00
Inventor 郭怀泉李海东毛可强白维坤宋录武
Owner SHANDONG INOV NEW MATERIALS CO LTD
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