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Preparation method of multiplex self-repair polyurethane blended material

A self-healing, polyurethane technology, applied in the field of polyurethane material crack repair, can solve the problems of not being able to repair repeatedly, affecting normal use, and obvious bonding parts, and achieving the effects of good material performance, improved bonding ability, and high repair efficiency.

Inactive Publication Date: 2017-06-13
UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most polyurethane materials on the market cannot self-repair themselves. Adhesives and repair agents need to be added to the cracks of polyurethane materials; repair

Method used

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  • Preparation method of multiplex self-repair polyurethane blended material
  • Preparation method of multiplex self-repair polyurethane blended material

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preparation example Construction

[0022] The preparation method of the multiple self-healing polyurethane blend material proposed by the present invention comprises the following steps:

[0023] (1) The following monomers, initiators, polyurethane resins and solvents are mixed in mass fractions to obtain mixtures:

[0024] Monomer 10-150 parts,

[0025] Initiator 1-10 parts,

[0026] 325-500 parts of polyurethane resin;

[0027] Solvent 2400-3200 parts

[0028] Wherein the monomer is dopamine methacrylamide or dopamine acrylamide, or two kinds are mixed in any proportion; the initiator is azobisisobutyronitrile, dimethyl azobisisobutyrate, One of azodiisovaleronitrile, azobiscyclohexylcarbonitrile or benzoyl peroxide, and the solvent is N,N-dimethylformamide;

[0029] (2) Stir and mix the mixture in step (1) evenly, and carry out solution radical polymerization reaction under the protection of an inert gas, the reaction temperature is 60-70° C., and the reaction time is 20-28 hours to obtain the reactant; ...

Embodiment 1

[0037] (1) The following monomers, initiators, polyurethane resins and solvents are mixed in mass fractions to obtain mixtures:

[0038] Monomer (dopamine methacrylamide) 0.175g

[0039] Initiator (azobisisobutyronitrile) 9.0mg

[0040] Polyurethane resin 3.325g

[0041] N,N-Dimethylformamide (DMF) 17g

[0042] (2) Stir and mix the mixture in step (1) evenly, and carry out solution radical polymerization reaction under the protection of an inert gas, the reaction temperature is 60-70° C., and the reaction time is 20-28 hours to obtain the reactant;

[0043] (3) Pour the reactants of step (2) into a mold, and dry at 68°C in an inert gas environment for 40 hours until the quality remains unchanged, and a multi-self- Repair the polyurethane blend material Poly(DMA) / PU blend film, and then cut the polyurethane blend film into specifications of 50mm in length and 6mm in width.

[0044] An electronic universal testing machine was used to test the tensile strength of the sample a...

Embodiment 2

[0047] (1) The following monomers, initiators, polyurethane resins and solvents are mixed in mass fractions to obtain mixtures:

[0048] Monomer (dopamine methacrylamide) 0.35g

[0049] Initiator (azobisisobutyronitrile) 18.0mg

[0050] Polyurethane resin 3.15g

[0051] N,N-Dimethylformamide (DMF) 20g

[0052] (2) Stir and mix the mixture in step (1) evenly, carry out solution radical polymerization reaction under the protection of inert gas, the reaction temperature is 70° C., and the reaction time is 28 hours to obtain the reactant;

[0053] (3) Pour the reactants of step (2) into a mold, and dry at 68°C in an inert gas environment for 44 hours until the quality remains unchanged, and a multi-self- Repair the polyurethane blend material Poly(DMA) / PU blend film, and then cut the polyurethane blend film into specifications of 50mm in length and 6mm in width.

[0054] According to the method of Example 1, heat it in an oven at 90°C for 40 minutes or place it under an infrared...

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Abstract

The invention relates to a preparation method of a multiplex self-repair polyurethane blended material, and belongs to the technical field of polyurethane material crack repair. The preparation method comprises the following steps: dissolving polyurethane resin in solvent, then pouring into a reactor in which a monomer, initiator and solvent having a specific mole ratio have been proportionally added, and performing solution free-radical polymerization reaction in an inert gas protective atmosphere; and after reacting at 60-70 DEG C for some time, stopping the reaction, uniformly stirring and mixing, pouring the mixture into a polytetrafluoroethylene mold, transferring to an inert gas atmosphere, putting in a baking oven of 70 DEG C, and drying until the mass is unchanged to obtain a Poly(DMA) / PU blended film. The preparation method provided by the invention can compensate for a polyurethane blended material crack gap; the self-repair efficiency is high; and the self-repair method is diversified and simple.

Description

technical field [0001] The invention relates to a preparation method of multiple self-repairing polyurethane blend materials, and belongs to the technical field of crack repairing of polyurethane materials. Background technique [0002] Polyurethane (PU) has the advantages of high strength, wear resistance, tear resistance, good bending performance and excellent processing performance, and its oil resistance and water resistance are extremely excellent. In recent years, as an emerging organic polymer material, it has been widely used in many fields of the national economy because of its excellent performance. The product application fields involve light industry, chemical industry, electronics, textile, medical treatment, construction, building materials, automobile, national defense, aerospace, aviation, etc., and is known as the "fifth largest plastic". [0003] Due to a wide range of applications and different use environments, polyurethane materials will inevitably have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/58
CPCC08F283/006C08F220/58
Inventor 黄继军宋盛菊
Owner UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
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