A kind of polyurethane containing alkyne group and preparation method thereof

A polyurethane and alkyne-based technology, applied in the field of flame retardant materials and high temperature resistant materials, can solve the problems of fire hazards, accompanied by black smoke, violent flames, etc., to reduce the peak heat release rate, reduce the amount of heat release, and mild reaction conditions stable effect

Inactive Publication Date: 2018-07-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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

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Embodiment 1

[0035] Preparation of MDI: PTMG: 1,4-butynediol molar ratio of 2:1:1 alkyne-containing polyurethane, called PU211, PTMG data molecular weight of 2000;

[0036] The raw materials are: 50.0g of MDI, 200.0g of PTMG, 8.6g of 1,4-butynediol,

[0037] 1) Put 200.0g of PTMG in a high-temperature vacuum oven at 120°C to remove moisture under vacuum for 2 hours;

[0038] 2) Add 50.0g of solid MDI into the reaction vessel and melt it at 50°C;

[0039] 3) Add 200.0 g of liquid PTMG obtained in step 1) into 50.0 g of liquid MDI obtained in step 2), stir under vacuum, and perform an addition reaction at 80° C. for 1 hour, and release the vacuum;

[0040] 4) Add 8.6 g of 1,4-butynediol to the product obtained in step 3), stir, and carry out chain extension reaction at 70° C. for 24 hours to obtain alkyne-containing polyurethane TPU211.

[0041] The reaction scheme of above-mentioned steps 3 and 4 is as follows:

[0042]

[0043] Table 1

[0044]

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Abstract

Belonging to the technical field of high temperature resistant materials and flame retardant materials, the invention relates to an alkynyl-containing polyurethane and a preparation method thereof. The method includes: mixing liquid polyether diol with liquid diisocyanate, conducting heating to carry out addition reaction, adding 1, 4-butynediol, performing heating to carry out condensation polymerization reaction, thus obtaining the high temperature resistant alkynyl-containing polyurethane at the end of the reaction. The method provided by the invention has the characteristics of mild and stable reaction conditions, good repeatability, high yield, and short cycle, etc., and is suitable for expanded production. The obtained polymer has excellent high temperature resistance, mechanical strength, flame retardance and other properties.

Description

technical field [0001] The invention relates to a high-temperature-resistant polyurethane containing alkyne groups and a preparation method thereof, belonging to the technical fields of high-temperature-resistant materials and flame-retardant materials. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is an elastic material between general rubber and plastic. Its main chain contains repeated urethane segments. It has excellent mechanical properties, such as high strength, high elasticity, and high elongation, so it can be made into rubber, coatings, adhesives, A series of products such as waterproof materials are widely used in the fields of automobiles, machinery, medical and aerospace. 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 droplet phenomenon, and its limiting oxygen index (LOI) is only between 18-20. , a serious fire ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/67C08G18/66C08G18/48
CPCC08G18/4825C08G18/4854C08G18/6666C08G18/679C08G18/7614C08G18/7671
Inventor 何吉宇唐启恒杨荣杰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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