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High-activity flame-retardant polymer polyol and preparation method thereof

A technology for flame retardant polymers and polyols, applied in the field of polyether polyols, can solve problems such as insufficient flame retardant efficiency and corrosive gas pollution, and achieve the effects of improving stability and flame retardancy

Inactive Publication Date: 2021-05-28
福建省天骄化学材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For polyether polyol products in the prior art, there are generally insufficient flame retardant efficiency, volatile and corrosive gas to cause pollution, etc., the present invention provides a kind of highly active flame retardant polymer polyol, which is composed of the following by weight: The composition is made of:

Method used

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  • High-activity flame-retardant polymer polyol and preparation method thereof
  • High-activity flame-retardant polymer polyol and preparation method thereof
  • High-activity flame-retardant polymer polyol and preparation method thereof

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Embodiment approach

[0039] As a preferred embodiment, the polymer polyol has a water content of less than or equal to 0.15%, a viscosity of greater than or equal to 1500mPa.s / 25°C, a nitrogen content of greater than or equal to 1%, and the oxygen index of the synthetic polyurethane product is above 25%. .

[0040] As a preferred embodiment, the water content of the polymer polyol is less than or equal to 0.14%, the viscosity is greater than 5000mPa.s / 25°C, the nitrogen content is greater than or equal to 5%, and the oxygen index of the synthetic polyurethane product is above 25%. .

[0041] This embodiment also provides a method for preparing the above-mentioned highly active flame-retardant polymer polyol, which is characterized in that it includes the following steps:

[0042] Step 1, mix melamine, dicyandiamide, paraformaldehyde and water evenly;

[0043] In step 2, the temperature of the mixed solution in step 1 is raised to 75-85° C. to react under normal pressure, and the reaction time is...

Embodiment 1

[0048] The preparation method of polymer polyol in the present embodiment, comprises the steps:

[0049] Step 1, mixing 19 parts by weight of melamine, 1.5 parts by weight of dicyandiamide, 5 parts by weight of paraformaldehyde and 15 parts by weight of water;

[0050] In step 2, the temperature of the mixed solution in step 1 is raised to 75-85° C. to react under normal pressure, and the reaction time is 1-2 hours to prepare the precursor;

[0051] Step 3, add 58 parts by weight of 6000 molecular weight polyether, 0.5 parts by weight of urea, 0.1 part by weight of triethylamine, and 0.9 parts by weight of amines to the product of step 2 and mix them evenly, and the temperature rises to 90 -110°C, keep the pressure at normal pressure, and continue to react for 4-8 hours;

[0052] Step 4, passing inert gas under high vacuum state to remove moisture to obtain the required polymer polyol.

Embodiment 2

[0054] The preparation method of polymer polyol in the present embodiment, comprises the steps:

[0055] Step 1, mixing 20 parts by weight of melamine, 4 parts by weight of dicyandiamide, 4 parts by weight of paraformaldehyde and 20 parts by weight of water;

[0056] In step 2, the temperature of the mixed solution in step 1 is raised to 75-85° C. to react under normal pressure, and the reaction time is 1-2 hours to prepare the precursor;

[0057]Step 3: Add 55 parts by weight of 6000 molecular weight polyether, 0.2 parts by weight of urea, 0.2 parts by weight of triethylamine, and 1 part by weight of amines into the block polyether of the initiator and mix evenly with the product of step 2, and the temperature rises to 90 -110°C, keep the pressure at normal pressure, and continue to react for 4-8 hours;

[0058] Step 4, passing inert gas under high vacuum state to remove moisture to obtain the required polymer polyol.

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Abstract

The invention discloses a high-activity flame-retardant polymer polyol and a preparation method thereof, and belongs to the technical field of polyether polyols. The high-activity flame-retardant polymer polyol comprises: 48 to 60 parts of 6000 molecular weight polyether; 10 to 20 parts of melamine; 1 to 5 parts of dicyandiamide; 0.1 to 1 part of urea; 0.1 to 0.4 part of triethylamine; 1 to 5 parts of paraformaldehyde; 10 to 25 parts of pure water; and 0.5 to 1.5 parts of block polyether with amine as an initiator. The preparation method comprises the following steps: uniformly mixing melamine, dicyandiamide, paraformaldehyde and water, heating to 75-85 DEG C, and reacting at normal pressure for 1-2 hours to prepare a precursor; adding the precursor into 6000 molecular weight polyether, urea, triethylamine and the block polyether with amine as the initiator, uniformly mixing, heating to 90-110 DEG C, keeping the pressure at normal pressure, and continuously reacting for 4-8 hours; and introducing inert gas in a high vacuum state, and removing water to prepare the polymer polyol. The product does not contain harmful components such as halogen and phosphate ester, is stable in structure and good in flame retardant property, and provides a new thought for research of environment-friendly flame-retardant polyether polyol.

Description

technical field [0001] The invention relates to the technical field of polyether polyols, in particular to a highly active flame-retardant polymer polyol and a preparation method thereof. Background technique [0002] Zhou Hongxin and others synthesized a bromine-containing flame-retardant polyether polyol. Without the use of flame retardants, the oxygen index of its polyurethane products reached 24.1%. However, when the halogen-containing polyether polyol is burned, a large amount of smoke will be produced, and the released hydrogen halide is a corrosive and toxic gas, which often causes secondary damage. [0003] Li Yan and others synthesized phosphorus-containing flame-retardant polyether polyols with trihydroxymethyl phosphine and propylene oxide. Without using flame retardants, the oxygen index of polyurethane products reached 25.6%. However, phosphorus-containing flame-retardant polyether polyols are easy to decompose, have high volatility, and poor heat resistance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/54C08G18/48
CPCC08G18/6795C08G18/544C08G18/482C08G18/4027
Inventor 苏国传谢泽成陈惠香
Owner 福建省天骄化学材料有限公司