Preparation method of self-repairing non-isocyanate polyurethane

A non-isocyanate, polyurethane technology, applied in the field of polyurethane, can solve problems such as environmental and human health hazards, and achieve the effects of easy operation, excellent mechanical properties, and excellent self-healing properties.

Inactive Publication Date: 2019-08-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyisocyanate and its raw material phosgene are highly toxic substances, which are harmful to the environment and human health.

Method used

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  • Preparation method of self-repairing non-isocyanate polyurethane
  • Preparation method of self-repairing non-isocyanate polyurethane
  • Preparation method of self-repairing non-isocyanate polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Preparation of furan ring-terminated non-isocyanate polyurethane prepolymer: Weigh 1 part of polyether triamine, 3 parts of diglycerol bicyclic carbonate, and 3 parts of furan methylamine in molar fractions, and react at 70°C for 8 hours to obtain Furan ring-terminated non-isocyanate polyurethane prepolymer M-NIPU-1 with polyethertriamine as the core;

[0033] 2) Weigh 1 part of aliphatic triamine, 3 parts of diglycerol bicyclic carbonate, and 3 parts of furyl methylamine in molar fractions, and react at 70°C for 8 hours to obtain a furan ring-terminated non- Isocyanate polyurethane prepolymer M-NIPU-2

[0034] 3) Preparation of self-healing non-isocyanate polyurethane: Weigh 8 parts of M-NIPU-1 and 12 parts of bismaleimide prepared in step 1) in molar parts, heat and mix at 160°C, pour into a mold Air bubbles were removed in a vacuum oven, and then cured at 60°C for 24 hours to obtain self-healing non-isocyanate polyurethane. Its tensile strength is 9MPa, and its ...

Embodiment 2

[0036] Take by weighing 6 parts of embodiment 1 in step 1) M-NIPU-1 and 2 parts of embodiment 1 in step 2) make M-NIPU-2 and 12 parts of bismaleimides in molar fractions , heated and mixed at 160°C, poured into a mold to remove air bubbles in a vacuum oven, and then cured at 60°C for 24 hours to obtain self-healing non-isocyanate polyurethane. Its tensile strength is 13MPa, and its initial self-healing efficiency is 71%.

Embodiment 3

[0038] Take by mole fraction 4 parts of M-NIPU-1 that step 1) makes in embodiment 1 and step 2) make M-NIPU-2 and 12 parts of bismaleimides in 4 parts of embodiment 1 , heated and mixed at 160°C, poured into a mold to remove air bubbles in a vacuum oven, and then cured at 60°C for 24 hours to obtain self-healing non-isocyanate polyurethane. Its tensile strength is 16MPa, and its initial self-healing efficiency is 73%.

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Abstract

The invention discloses a preparation method of self-repairing non-isocyanate polyurethane, and belongs to the technical field of polyurethane. Firstly, a furan ring-terminated non-isocyanate polyurethane pre-polymer is prepared by reacting diglycerin bicyclic carbonate with furfurylamine, a polyether triamine or an aliphatic triamine, and then the pre-polymer is mixed with bismaleimide for carrying out a DA reaction under catalyst-free and solvent-free conditions to prepare the self-repairing non-isocyanate polyurethane. According to the method, the raw material is easy to obtain, the reaction condition is mild, the operation is simple and convenient, the process is green and environment-friendly, and the prepared self-repairing non-isocyanate polyurethane has excellent mechanical properties and self-repairing efficiency.

Description

technical field [0001] The invention relates to a method for synthesizing self-repairing non-isocyanate polyurethane by using non-isocyanate polyurethane prepolymer and bismaleimide through DA reaction. It specifically involves synthesizing furan ring-terminated non-isocyanate polyurethane prepolymer with diglycerol bicyclic carbonate, furan methylamine and polyether triamine or aliphatic triamine, and then mixing with bismaleimide, through DA reaction in the absence of The invention discloses a catalyst for preparing self-repairing non-isocyanate polyurethane under the condition of no solvent, and belongs to the technical field of polyurethane. [0002] technical background [0003] During the use of polymer materials, they will inevitably be affected by chemical corrosion, mechanical wear and other effects, resulting in hard-to-observe cracks inside the material. These cracks not only reduce the mechanical properties of the material, but also greatly reduce its service lif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G71/04
CPCC08G71/04
Inventor 赵京波王鼎文张军营
Owner BEIJING UNIV OF CHEM TECH
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