Intumescent flame retardant and application thereof in polyurethane foam

An intumescent flame retardant and solvent technology, which is applied in the field of foaming materials, can solve problems such as not easy to precipitate, unsustainable flame retardant effect, easy water absorption and failure of phosphate flame retardant, etc., and achieve good compactness and good water resistance and solubility , outstanding flame retardant effect

Inactive Publication Date: 2016-11-23
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an intumescent flame retardant resistant to hydrolysis and not easy to precipitate and its application in polyurethane foam, so as to solve the problems that phosphate flame retardants are easy to absorb water and fail in polyurethane foam, and the flame retardant effect cannot last

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) In parts by weight, add 5g of sodium dodecylsulfonate to 40g of toluene solvent, then add 15g of ammonium dihydrogen phosphate and 50g of an aqueous solution with a mass concentration of ethylene glycol of 30%, and mix well to obtain emulsion A.

[0041] (2) Add 2g of stannous octoate and 100g of hexamethylene diisocyanate (HDI) to 40g of toluene, and disperse evenly to form emulsion B

[0042] (3) Mix emulsion A and emulsion B under stirring, heat slowly to 50 o C, react for 1 hour, cool down and centrifuge, and the precipitate is washed with water, suction filtered and dried to obtain a high-efficiency intumescent flame retardant.

Embodiment 2

[0044] (1) In parts by weight, add 10 g of sodium dodecyl diphenyl ether disulfonate to 50 g of tetrahydrofuran solvent, then add 25 g of diammonium hydrogen phosphate and 60 g of polyethylene glycol-200 in an aqueous solution with a mass concentration of 40%. , mixed evenly to obtain emulsion A.

[0045] (2) Add 3g of dibutyltin dilaurate and 100g of isophorone diisocyanate (IPDI) to 50g of tetrahydrofuran, and disperse evenly to form emulsion B

[0046] (3) Mix emulsion A and emulsion B under stirring, heat slowly to 60 o C, react for 2 hours, cool down and centrifuge, and the precipitate is washed with water, suction filtered and dried to obtain a high-efficiency intumescent flame retardant.

Embodiment 3

[0048] (1) In parts by weight, add 15 g of sodium lauryl sulfate to 100 g of acetone solvent, then add 40 g of dipotassium hydrogen phosphate and 100 g of an aqueous solution with a mass concentration of 50% of pentanediol, and mix well to obtain emulsion A.

[0049] (2) Add 5g of dibutyltin dilaurate and 150g of toluene diisocyanate (TDI) to 100g of acetone, and disperse evenly to form emulsion B

[0050] (3) Mix emulsion A and emulsion B under stirring, heat slowly to 60 o C, react for 2 hours, cool down and centrifuge, and the precipitate is washed with water, suction filtered and dried to obtain a high-efficiency intumescent flame retardant.

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Abstract

The invention discloses an intumescent flame retardant and application thereof in polyurethane foam, the intumescent flame retardant is a microcapsule which takes a phosphate as a capsule core and is coated with a polymer as a wall shell, and the intumescent flame retardant is prepared by the following process: a solvent is divided into two equal parts, an emulsifying agent, the phosphate and a water solution of a water soluble polymer reaction monomer are added into one part of the solvent for mixing to obtain an emulsion A; isocyanate and a catalyst are added into the other part of the solvent to obtain an emulsion B; and the emulsion A and the emulsion B are stirred for mixing reaction to obtain the intumescent flame retardant. The intumescent flame retardant is the microcapsule which takes the phosphate as the capsule core, is coated with the polymer as the wall shell and is prepared by interfacial polymerization method, when the microcapsule is heated, the phosphate is used as an acid source and a foaming agent, the coating polyurea or polyurethane is used as a charring agent, and the new intumescent flame retardant comprising the microcapsule has prominent flame retardant effect and can be widely used.

Description

[0001] technical field [0002] The invention belongs to the technical field of foaming materials, and in particular relates to an intumescent flame retardant and its application in polyurethane foam. [0003] Background technique [0004] Because phosphate has the characteristics of low melting point, high phosphorus content and low carbon content, it can absorb heat and decompose into metaphosphoric acid or phosphoric acid during combustion, and melt at low temperature to produce a layer of glass-like film residue covering, which is generated during combustion. It has less smoke, so it can be used as a flame retardant. For example, Chinese patent CN103755908A discloses that when hollow glass microspheres and phosphate are added to rigid polyurethane foam, the phosphate can absorb heat and decompose into metaphosphoric acid and phosphoric acid when it is burned. The glass-like film remains the covering, and then forms a molten heat insulation layer with the non-combustibl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10C08K3/32C08G18/32C08G18/48C08G18/66C08G18/61C08K9/06C08K7/28
Inventor 杨桂生袁海霞徐芹
Owner HEFEI GENIUS NEW MATERIALS
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