Polyimide-type polyurethane containing DOPO group and preparation method of polyimide-type polyurethane

A technology of polyimide and polyurethane, which is applied in the field of flame retardant materials, can solve problems such as violent flames, droplet phenomena, and fire hazards, achieve mild and stable reaction conditions, reduce heat release, peak heat release rate, cycle time short effect

Inactive Publication Date: 2014-12-10
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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  • Polyimide-type polyurethane containing DOPO group and preparation method of polyimide-type polyurethane
  • Polyimide-type polyurethane containing DOPO group and preparation method of polyimide-type polyurethane
  • Polyimide-type polyurethane containing DOPO group and preparation method of polyimide-type polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Prepare MDI:PTMG:DOPO-NQ:PMDA molar ratio of 3:2:0.5:0.5 polyimide polyurethane, called PIU321, PTMG data molecular weight is 2000, DOPO-NQ molecular formula is:

[0041] The molecular formula of PMDA is:

[0042] The raw materials are: 75.0g of MDI, 400.0g of PTMG, 18.7g of DOPO-NQ, 10.9g of PMDA, and 500mL of N,N-dimethylformamide (DMF) solvent;

[0043] 1) Put 400.0g of PTMG in a vacuum oven at a high temperature of 120°C, and remove moisture under vacuum conditions for 2 hours;

[0044] 2) Add 75.0g of solid MDI into the reaction vessel and melt it at 50°C;

[0045] 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;

[0046] 4) Add N,N-dimethylformamide (DMF) solution containing 18.7g DOPO-NQ to the product obtained in step 3), stir, and carry out chain extension reaction at 110°C for 12h;

[0047] 5) Add the N,N-dimethyl...

Embodiment 2

[0051] Prepare MDI:PTMG:DOPO-NQ:PMDA molar ratio of 2:1:0.5:0.5 polyimide polyurethane, called PIU211;

[0052] The raw materials are: 50.0g of MDI, 200.0g of PTMG, 18.7g of DOPO-NQ, 10.9g of PMDA, and 500mL of N,N-dimethylformamide (DMF) solvent;

[0053] The preparation method is the same as in Example 1 to obtain polyimide polyurethane PIU211 containing DOPO groups.

Embodiment 3

[0055] Prepare MDI:PTMG:DOPO-NQ:PMDA molar ratio of 3:1:1:1 polyimide polyurethane, called PIU321;

[0056] The raw materials are: 75.0g of MDI, 100.0g of PTMG, 37.4g of DOPO-NQ, 21.8g of PMDA, and 500mL of N,N-dimethylformamide (DMF) solvent;

[0057] The preparation method is the same as in Example 1 to obtain polyimide polyurethane PIU312 containing DOPO groups.

[0058] Table 1

[0059]

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Abstract

The invention relates to polyimide-type polyurethane containing a DOPO group and a preparation method of the polyimide-type polyurethane, and belongs to the technical fields of heat-resistant materials and flame retardant materials. The method comprises the following steps: mixing liquid polyether diol with liquid diisocyanate, heating and carrying out addition reaction, and then adding a pyromellitic dianhydride (PMDA) and DOPO derivative mixed solution; heating and carrying out polycondensation; and drying a solvent, so as to obtain the polyimide-type polyurethane. The method has the characteristics of mild and stable reaction condition, good repeatability, high productive rate, short cycle and the like, and is suitable for expanded production, and the obtained polymer has a plurality of performances such as excellent flame retardant property.

Description

technical field [0001] The invention relates to a polyimide type polyurethane containing DOPO groups 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 macromolecular main chain is composed of a flexible segment with a glass transition temperature lower than room temperature and a rigid segment with a glass transition temperature higher than room temperature. As a kind of material with comprehensive properties, it not only has the high strength of plastic, but also has the high elasticity and high elongation of rubber, and can be made into a series of products such as rubber, adhesive, etc. It is widely used in automobile, machinery, aerospace and other 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 b...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/10C08G73/10
CPCC08G18/10C08G18/3218C08G18/346C08G18/4854C08G18/6674C08G18/6692C08G18/7671C08G73/10
Inventor 何吉宇唐启恒杨荣杰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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