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Flame-retardant diphenylmethane diisocyanate derivative and synthetic method thereof

A technology of diisocyanate and diphenylmethane, which is applied in the field of polyurethane materials, can solve the problems of poor flame retardancy of polyurethane foam materials, achieve the effects of improving flame retardancy and VOC performance, high flame retardancy upper limit, and reducing usage

Pending Publication Date: 2020-09-11
WANHUA ENERGY-SAVING TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention solves the problem of poor flame retardancy of polyurethane foam materials, and provides a derivative of flame retardant diphenylmethane diisocyanate and its synthesis method, which has good flame retardant effect and can reduce the physical and chemical properties of polyether polyol components. The amount of flame retardant added to achieve the purpose of reducing VOC and odor while flame retardant

Method used

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  • Flame-retardant diphenylmethane diisocyanate derivative and synthetic method thereof
  • Flame-retardant diphenylmethane diisocyanate derivative and synthetic method thereof
  • Flame-retardant diphenylmethane diisocyanate derivative and synthetic method thereof

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Embodiment 1

[0042] The structural formula of the flame-retardant diphenylmethane diisocyanate derivative of the present embodiment is:

[0043]

[0044] The synthetic method of the flame-retardant diphenylmethane diisocyanate derivative of the present embodiment is as follows:

[0045] Bromoaniline-containing monomer small molecule raw material, the structural formula is as follows:

[0046]

[0047] First, small molecules containing bromoaniline monomers react with 25% to 35% hydrochloric acid catalyst (the molar ratio of hydrochloric acid to small molecules of aniline monomers is 0.5 to 1.0:1) to generate aniline hydrochloride solution, and then add 35% ~39% formaldehyde aqueous solution (the molar ratio of formaldehyde and aniline monomer small molecules is 0.3~0.5:1), conduct condensation reaction at 80°C for 1~2h, then raise the temperature to about 100°C for 1h, carry out Rearrangement reaction, the solution is neutralized with caustic soda aqueous solution to become neutral ...

Embodiment 2

[0056] The flame-retardant diphenylmethane diisocyanate derivative of the present embodiment has the structural formula:

[0057]

[0058] The synthetic method of the flame-retardant diphenylmethane diisocyanate derivative of the present embodiment is as follows:

[0059] Bromoaniline-containing monomer small molecule raw material, the structural formula is;

[0060]

[0061]First, small molecules containing bromoaniline monomers react with 25% to 35% hydrochloric acid catalyst (the molar ratio of hydrochloric acid to small molecules of aniline monomers is 0.5 to 1.0:1) to generate aniline hydrochloride solution, and then add 35% ~39% formaldehyde aqueous solution (the molar ratio of formaldehyde and aniline monomer small molecules is 0.3~0.5:1), conduct condensation reaction at 80°C for 1~2h, then raise the temperature to about 100°C for 1h, carry out Rearrangement reaction, the solution is neutralized with caustic soda aqueous solution to become neutral to obtain a fl...

Embodiment 3

[0070] The flame-retardant diphenylmethane diisocyanate derivative of the present embodiment has the chemical structural formula:

[0071]

[0072] The synthetic method of the flame-retardant diphenylmethane diisocyanate derivative of the present embodiment comprises the following steps:

[0073] Bromoaniline-containing monomer small molecule raw material, the chemical structure formula is:

[0074]

[0075] First, small molecules containing bromoaniline monomers react with 25% to 35% hydrochloric acid catalyst (the molar ratio of hydrochloric acid to small molecules of aniline monomers is 0.5 to 1.0:1) to generate aniline hydrochloride solution, and then add 35% ~39% formaldehyde aqueous solution (the molar ratio of formaldehyde and aniline monomer small molecules is 0.3~0.5:1), conduct condensation reaction at 80°C for 1~2h, then raise the temperature to about 100°C for 1h, carry out Rearrangement reaction, the solution is neutralized with caustic soda aqueous solutio...

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Abstract

The invention relates to a flame-retardant diphenylmethane diisocyanate derivative and a synthesis method of the derivative, and belongs to the technical field of polyurethane materials. The general chemical structural formula of the flame-retardant diphenylmethane diisocyanate derivative is n (X) NCO-Ar-CH2-Ar-NCO(X)n, wherein the Ar is a benzene ring, n is 1-4, and X is Br or Cl; the synthesis method of a derivative of flame-retardant diphenylmethane diisocyanate comprises the following steps: carrying out condensation reaction on bromine-containing aniline monomer micromolecules and formaldehyde, sequentially carrying out hydrochloric acid salification, molecular rearrangement and caustic alkali neutralization reaction to obtain a flame-retardant diphenylamine intermediate, and carryingout phosgenation reaction on the flame-retardant diphenylamine intermediate to obtain the flame-retardant diphenylmethane diisocyanate derivative. The flame retardant effect is good, the addition amount of a physical flame retardant in the polyether polyol component can be reduced, and the purpose of reducing VOC and odor while achieving high flame retardance is achieved.

Description

technical field [0001] The invention relates to a derivative of flame-retardant diphenylmethane diisocyanate and a synthesis method thereof, belonging to the technical field of polyurethane materials. Background technique [0002] Flame retardancy has always been an important issue facing the polyurethane foam industry. Fire protection has stricter requirements on thermal insulation materials, and building fire protection design measures have become more and more standardized. The application of polyurethane foam in the field of building insulation and sound insulation has been restricted, especially since GB 50016-2014 was implemented on May 1, 2015. The wall insulation market continues to decline. In the field of passenger cars, GB38262-2019 The combustion characteristics of passenger car interior materials will be implemented on July 1, 2020. It stipulates that the horizontal combustion of polyurethane seats is A0 level, and the vertical combustion is ≤100mm / min; In add...

Claims

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Application Information

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IPC IPC(8): C07C263/10C07C265/14C07C209/78C07C211/52C08G18/77
CPCC07C209/78C07C263/10C07C265/14C08G18/773C07C211/52
Inventor 王磊潘振勇韩延康刘永亮窦忠山王耀西余郁
Owner WANHUA ENERGY-SAVING TECH GRP CO LTD
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