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Self-repairing reprocessable polyurea material as well as preparation method and application

A repetitive processing and self-repairing technology, applied in polyurea/polyurethane coatings, additive processing, anti-corrosion coatings, etc., can solve problems such as storage difficulties and poor stability of polyurea, and achieve improved mechanical strength, good reprocessing performance, and self-healing The effect of high repair efficiency

Inactive Publication Date: 2018-09-21
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: In order to solve the problems of poor stability and difficult storage of the existing polyurea, the present invention provides a self-repairing and reprocessable polyurea material and its preparation method and application. It is obtained that under the action of high temperature or catalyst, it is a new type of thermoresponsive dynamic bond, which can make the material self-repair at 80°C, and the hydrogen bond interaction between urea bonds can improve the mechanical strength of the material. The polyurea The material has excellent mechanical properties, certain transparency, good reprocessing performance, high self-repair efficiency, low repair temperature, simple preparation process, and relatively low cost

Method used

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  • Self-repairing reprocessable polyurea material as well as preparation method and application
  • Self-repairing reprocessable polyurea material as well as preparation method and application
  • Self-repairing reprocessable polyurea material as well as preparation method and application

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preparation example Construction

[0031] The amino-terminated polyetheramine is an amino-terminated polyetheramine with a molecular weight of 200-20000. The diisocyanate is any one of toluene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate, hexamethylene diisocyanate, and dicyclohexylmethane diisocyanate. The crosslinking agent is hexamethylene diisocyanate trimer, toluene diisocyanate trimer, and diphenylmethane diisocyanate trimer. The catalyst is zinc acetate, trifluoromethanesulfonate (such as zinc trifluoromethanesulfonate, nickel trifluoromethanesulfonate, lanthanum trifluoromethanesulfonate, cerium trifluoromethanesulfonate, etc.), dibutyltin dilaurate , Stannous octoate, iron trichloride, cesium fluoride, ammonium fluoride, triethylamine, N,N-dimethylcyclohexylamine or any one of Lewis acid and Lewis base catalyst. The polyetheramine is an amino-terminated polyamide, an amino-terminated polysiloxane, an amino-terminated dihydrazide, an amino-terminated nylon, an amino-containing organ...

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Abstract

The invention relates to the field of new materials, in particular to a self-repairing reprocessable polyurea material as well as a preparation method and application. The self-repairing reprocessablepolyurea material comprises the following raw materials in parts by weight: 3 to 13 parts of a cross-linking agent, 79 parts of amino-terminated polyetheramine, 8 to 18 parts of diisocyanate, and 1 to 5 parts of a catalyst. The polyurea material is obtained by reacting an amino group with isocyanate, and is a novel heat-responsive dynamic bond under the action of high temperature or the catalyst,so that the material can be self-repaired at 80 DEG C, and the interaction of hydrogen bonds between urea bonds can improve the mechanical strength of the material; and the polyurea material is excellent in mechanical properties, endowed with certain transparency, good in reworking properties, high in self-repairing efficiency, relatively low in repair temperature, simple in preparation technology, and low in relative cost.

Description

Technical field [0001] The invention relates to the field of new materials, in particular to a self-repairing and repeatable polyurea material and its preparation method and application. Background technique [0002] Polyurea is an elastomer substance formed by the reaction of isocyanate component and amino compound component. Divided into pure polyurea and semi-polyurea, their performance is different, the most basic characteristics of polyurea are anti-corrosion, waterproof, wear resistance and so on. Polyurea technology will provide China's future large-scale infrastructure construction, such as chemical protection, pipeline anti-corrosion, marine anti-corrosion, tunnel waterproofing, dam maintenance, bridge protection, foundation reinforcement, roof planting, prop production, fender manufacturing, etc. The most advanced overweight anti-corrosion, waterproof, wear-resistant and decorative materials, and the most convenient and quick construction. [0003] At present, there are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/50C08L75/02B33Y70/00C09D175/02C09D5/08C08L63/00C08L67/00C08L33/12C08L25/06C08L75/04C08L83/04C08L61/06C08L61/24C08K3/04C08K3/36C08K3/22C08K7/14
CPCB33Y70/00C08G18/5024C08K2003/2241C08K2201/011C08L25/06C08L33/12C08L61/06C08L61/24C08L63/00C08L67/00C08L75/02C08L75/04C08L83/04C09D5/08C09D175/02C08K3/042C08K3/041C08K3/36C08K3/22C08K7/14
Inventor 夏和生王占华王振华傅代华蒲武利孙劭杰
Owner SICHUAN UNIV
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