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Synthetic method of flame-retardation hard foam polyether polyol

A technology of polyether polyol and synthesis method, which is applied in the field of synthesis of flame-retardant rigid foam polyether polyol, can solve the problems of difficult and incomplete reaction of flame-retardant rigid foam polyether melamine, achieve high activity, improve resistance The effect of flammability

Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of flame-retardant rigid foam polyether by this method has the problem of difficult and incomplete reaction of melamine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 324.3 g of formaldehyde aqueous solution to the four-neck flask, adjust the pH to 10.2 with triethanolamine, add 126 g of melamine, place the flask in a water bath and heat to 82° C., and react for 4 hours. Prepare the initiator for flame-retardant polyether, then take 470g of the initiator and put it into the reactor, add the catalyst dimethylethanolamine 6.0g, triethanolamine 64.5g, nitrogen replacement three times, heat up to 65 ° C, and continue to feed PO400g is ring-opened and etherified, the temperature is controlled within the range of 65-75°C, and then the temperature is raised to 100°C for vacuum dehydration, and after 3 hours, PO300g is continuously fed to obtain a flame-retardant polyether.

Embodiment 2

[0022] Add 324.3g of formaldehyde aqueous solution into the four-neck flask, adjust the pH to 10.4 with triethanolamine, add 126g of melamine, place the flask in a water bath and heat it to 80°C, and react for 3 hours to prepare an initiator for flame-retardant polyether, and then Take 470g of the initiator and put it into the reactor, add 8.0g of catalyst dimethylethanolamine, 85g of sucrose, replace with nitrogen three times, raise the temperature to 65°C, continue to feed PO400g for ring-opening etherification, and control the temperature at 65-75°C within the range, then the temperature was raised to 100°C for vacuum dehydration, and after 3 hours, 600 g of PO was continuously introduced to obtain a flame-retardant polyether.

Embodiment 3

[0024] Add 324.3 g of formaldehyde aqueous solution to the four-necked flask, adjust the pH to 10.5 with triethanolamine, add 126 g of melamine, place the flask in a water bath and heat it to 83 ° C, and react for 3.5 hours to prepare the initiator for flame-retardant polyether, and then Take 470g of the initiator and put it into the reaction kettle, add 9.0g of catalysts dimethylethanolamine, 90g of sorbitol, replace with nitrogen three times, raise the temperature to 65°C, continue to feed PO400g for ring-opening etherification, and control the temperature at 65-75°C Within the range, then the temperature was raised to 100°C for vacuum dehydration, and after 3 hours, 500 g of PO was continued to be passed through to obtain a flame-retardant polyether.

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Abstract

The invention relates to a synthetic method of flame-retardation hard foam polyether polyol. The method comprises the following steps: using triethanolamine to adjust a pH value scope of a formaldehyde solution to 10.0-10.5, then uniformly mixing the formaldehyde solution and melamine, heating the raw materials to the temperature of 80-85 DEG C and reacting the raw materials to obtain a starting agent; placing the starting agent in an intermittent reaction vessel, adding a catalyst dimethyl ethanolamine and a dispersant, heating the materials, and replacing the materials by nitrogen, in a temperature scope of 65-75 DEG C, introducing a first segment epoxypropane for an etherification reaction at pressure of 0.10-0.20 MPa, then heating the materials and perform vacuum-dehydration on the materials, then continuously introducing a second segment epoxypropane, and heating the material to finish the reaction. The activity of the modified melamine is high, and melamine and other polyol starting agents are subjected to complex formulation, and the reaction is complete. The synthesized melamine hard foam polyether does not contain harmful elements such as halogen and phosphor, has structural flame resistance, and has obvious foam flame retardation performance when applied in the polyurethane hard foam.

Description

technical field [0001] The invention relates to a synthesis method of flame-retardant rigid polyether polyol, in particular to a synthesis method using liquefied melamine resin as an initiator. Background technique [0002] Polyurethane rigid foam has small bulk density, high strength, low thermal conductivity and heat insulation. Excellent sound insulation performance, simple and fast processing and molding, so it is widely used as thermal insulation materials and structural materials in petroleum, chemical industry, construction, refrigeration, transportation, etc. In developed countries in Europe and the United States, polyurethane rigid foam is mainly used in construction, accounting for 50% of the total. [0003] However, polyurethane foam products are extremely flammable and produce a large amount of smoke and dust when burned, which has a very bad impact on human health and the environment. Over the past few years, foreign countries have paid great attention to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26
Inventor 关淞云龚彦文李玉松丁炳海袁宝丰陈伟孙静
Owner CHINA PETROLEUM & CHEM CORP
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