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Preparation method of flame-retardant polyurethane resin

A technology of polyurethane resin and phosphate ester, which is applied in the field of preparation of flame retardant resin materials, can solve the problems of decreased comprehensive performance of materials, poor dispersion of flame retardants, migration of flame retardants, etc., achieves excellent mechanical properties, improves mechanical properties and resistance Combustibility, the method is simple and easy to control the effect

Inactive Publication Date: 2015-12-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2014, the "Shanghai Jing'an Temple Fire" accident pushed the wall insulation material polyurethane to the public "judgment seat", and the poor flame retardancy of polyurethane seriously restricted the application of polyurethane
The flame retardant modification of polyurethane is mainly through physical addition in industrial production. This method has certain defects: the dispersion of flame retardants in polyurethane is poor, and it is easy to agglomerate, resulting in a decline in the overall performance of the material; on the other hand, after a long time , flame retardants are prone to migration, resulting in poor flame retardant effect
However, cyclodextrin inclusion complexes have not been reported for polyurethane flame retardancy.

Method used

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  • Preparation method of flame-retardant polyurethane resin

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add 3.08g of β-cyclodextrin and 1.54g of resorcinol bis(diphenyl) phosphate to 30ml of DMAc solution, and mix thoroughly at 50°C for 1 hour to form β-cyclodextrin / RDP Complex;

[0024] (2) Set aside to settle, filter, vacuum dry, add 10ml of ethanol, wash excess RDP, and obtain β-cyclodextrin / RDP clathrate;

[0025] (3) Take 0.53g of β-cyclodextrin / RDP clathrate, add it to 35g of polyurethane resin with a solid content of 30%, add 16ml of DMAc to dissolve, stir well at room temperature, let stand, defoam, and shape to prepare polyurethane resin Combustion film and spline.

Embodiment 2

[0027] (1) Add 3.27g of β-cyclodextrin and 3.27g of resorcinol bis(diphenyl) phosphate to 30ml of DMAc solution, and mix thoroughly at 55°C for 2 hours to form β-cyclodextrin / RDP Complex;

[0028] (2) Set aside to settle, filter, vacuum dry, add 15ml of ethanol, wash excess RDP, and obtain β-cyclodextrin / RDP clathrate;

[0029] (3) Take 1.05g of β-cyclodextrin / RDP clathrate, add it to 35g of polyurethane resin with a solid content of 30%, add 14ml of DMAc to dissolve, stir well at room temperature, let stand, defoam, and shape to prepare polyurethane resin Combustion film and spline.

Embodiment 3

[0031] (1) Add 2.59g of β-cyclodextrin and 5.18g of resorcinol bis(diphenyl) phosphate to 25ml of DMAc solution and mix thoroughly at 60°C for 3 hours to form β-cyclodextrin / RDP Complex;

[0032] (2) Set aside to settle, filter, vacuum dry, add 25ml of ethanol, wash excess RDP, and obtain β-cyclodextrin / RDP clathrate;

[0033] (3) Take 1.58g of β-cyclodextrin / RDP clathrate, add it to 35g of polyurethane resin with a solid content of 30%, add 12ml of DMAc to dissolve, stir well at room temperature, let stand, defoam, and shape to prepare polyurethane resin Combustion film and spline.

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Abstract

The invention relates to a preparation method of flame-retardant polyurethane resin. The preparation method comprises the steps of adding cyclodextrin and resorcinol bi(diphenyl) phosphate (RDP) to a solvent, conducting mixing, and obtaining a cyclodextrin / RDP compound; making the cyclodextrin / RDP compound be subjected to still standing for seimentation, filteration, vacuum drying and washing, and obtaining a cyclodextrin / RDP clathrate compound; adding the cyclodextrin / RDP clathrate compound to polyuretane resin, then adding the solvent, stirring the mixture uniformly, leaving the mixture still standing, conducting defoaming and formation, and obtaining the flame-retardant polyurethane resin. The preparation method of the flame-retardant polyurethane resin is simple and easy to control, the problems that resorcinol diphenyl phosphate is poor in dispersity in a base body and prone to migrating when serving as fire retardant can be solved, and meanwhile the mechanical property and the flame retardant property of polyurethane are substantially improved.

Description

technical field [0001] The invention belongs to the field of preparation of flame retardant resin materials, in particular to a preparation method of flame retardant polyurethane resin. Background technique [0002] Polyurethane foam has the advantages of low thermal conductivity, strong adhesion, and good water resistance, and is currently the best building insulation material. In 2014, the "Shanghai Jing'an Temple Fire" accident pushed the wall insulation material polyurethane to the public "judgment seat". The poor flame retardancy of polyurethane seriously restricted the application of polyurethane. The flame retardant modification of polyurethane is mainly through physical addition in industrial production. This method has certain defects: the dispersion of flame retardants in polyurethane is poor, and it is easy to agglomerate, resulting in a decline in the overall performance of the material; on the other hand, after a long time , the flame retardant is prone to migr...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K9/10C08K5/523
Inventor 陈大俊于东杰
Owner DONGHUA UNIV
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