A kind of polyurethane containing dopo group and preparation method thereof

A polyurethane and group technology, applied in the field of flame retardant materials, can solve the problems of severe flames, droplet phenomenon, fire hazards, etc., and achieve the effects of reducing the peak heat release rate, short cycle, and reducing heat release

Inactive Publication Date: 2017-02-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an organic polymer material, it is easy to burn in the air. When burning, the flame is very violent and accompanied by black smoke, and it has serious droplet phenomenon, and its limiting oxygen index (LOI) is only between 18-20. , a serious fire hazard

Method used

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  • A kind of polyurethane containing dopo group and preparation method thereof
  • A kind of polyurethane containing dopo group and preparation method thereof
  • A kind of polyurethane containing dopo group and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of MDI:PTMG:DOPO-NQ molar ratio of 3:2:1 DOPO group-containing polyurethane, called PU321; the number average molecular weight of PTMG is 2000; DOPO-NQ molecular formula is:

[0035] The raw materials are: 75.0g of MDI, 400.0g of PTMG, 37.4g of DOPO-NQ, and 500mL of N,N-dimethylformamide solvent;

[0036] 1) Put 400.0g of PTMG in a high-temperature vacuum oven at 120°C to remove moisture under vacuum for 3 hours;

[0037] 2) Add 75.0g of solid MDI into the reaction vessel and melt it at 50°C;

[0038] 3) Add 400.0 g of liquid PTMG obtained in step 1) into 75.0 g of liquid MDI obtained in step 2), stir under vacuum, and perform addition reaction at 80° C. for 1 hour, and release the vacuum;

[0039] 4) Add the N,N-dimethylformamide solution containing 37.4g DOPO-NQ to the product obtained in step 3), stir, and carry out the chain extension reaction at 70°C for 24 hours to obtain the polyurethane PU321 containing DOPO groups .

[0040] Above-mentioned ste...

Embodiment 2

[0044]Preparation of MDI:PTMG:DOPO-NQ molar ratio of 2:1:1 DOPO-containing polyurethane, called PU211;

[0045] The raw materials are: 50.0g of MDI, 200.0g of PTMG, 37.4g of DOPO-NQ, and 500mL of N,N-dimethylformamide solvent;

[0046] The preparation method is the same as in Example 1 to obtain DOPO-containing polyurethane PU211.

Embodiment 3

[0048] Preparation of MDI:PTMG:DOPO-NQ molar ratio of 3:1:2 DOPO-containing polyurethane, called PU321;

[0049] The raw materials are: MDI is 75.0g, PTMG is 100.0g, DOPO-NQ is 74.8g, N,N-dimethylformamide solvent is 500mL;

[0050] The preparation method is the same as in Example 1 to obtain DOPO-containing polyurethane PU312.

[0051] Table 1

[0052]

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PUM

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Abstract

The invention relates to polyurethane containing DOPO groups and a preparation method thereof and belongs to the technical field of high-temperature resistant materials and flame-retardant materials. The preparation method comprises the following steps: mixing liquid polyether diol with liquid diisocyanate, heating to perform addition reaction, subsequently adding a solution of a DOPO derivative, heating to perform condensation polymerization, and drying the solvent, thereby obtaining DOPO polyurethane. The polyurethane has the characteristics of gentle and stable reaction condition, good repeatability, high yield, short period and the like, and is applicable to large-scale production.

Description

technical field [0001] The invention relates to a DOPO group-containing polyurethane and a preparation method thereof, belonging to the technical field of flame-retardant materials. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a kind of main chain containing repeated urethane segments. The main chain of the macromolecule is composed of a flexible segment with a glass transition temperature lower than room temperature and a rigid chain with a glass transition temperature higher than room temperature. It has not only the high strength of plastics, but also the high elasticity and elongation of rubber, and can be made into a series of products such as foam plastics, adhesives, fibers, waterproof materials, etc., so it is widely used In automotive, medical and aerospace fields. However, as an organic polymer material, it is easy to burn in the air. When burning, the flame is very violent and accompanied by black smoke, and it also has serious drop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32
CPCC08G18/388C08G18/4854C08G18/6666
Inventor 何吉宇唐启恒杨荣杰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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