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High-barrier polyurethane self-repairing composition and preparation method thereof

A polyurethane and self-healing technology, applied in polyurea/polyurethane coatings, coatings, anti-corrosion coatings, etc., can solve the problems of poor dispersion stability and achieve high barrier properties and enhanced anti-corrosion properties

Pending Publication Date: 2021-12-24
江苏图研新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene is a substance that is hydrophobic, chemically stable and easy to agglomerate during the dispersion process, so its dispersion stability is poor.

Method used

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  • High-barrier polyurethane self-repairing composition and preparation method thereof
  • High-barrier polyurethane self-repairing composition and preparation method thereof
  • High-barrier polyurethane self-repairing composition and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0034] The high-barrier polyurethane self-healing composition includes: polyisocyanate, polyol, chain extender, graphene microcapsule, anti-aging additive, talcum powder and catalyst.

[0035] The mass ratio of the above-mentioned substances is:

[0036] Polyisocyanate: polyol: chain extender: graphene microcapsule: anti-aging additive: talcum powder: catalyst=28.6:56.2:5.2:5:1:3:2.

[0037] In this embodiment, the polyisocyanate is selected from diphenylmethane diisocyanate (MDI, Wanhua Chemical), the polyol is selected from polytetramethylene ether glycol (PTMEG1000, BASF Chemical), and the chain extender is selected from 1, 4-Butanediol (BDO), the catalyst is selected from dibutyltin dilaurate (Your Chemical) and triethylamine (Hualu Hengsheng), wherein the mass ratio of dibutyltin dilaurate to triethylamine is 1.3:1 .

[0038] Such as figure 1 As shown, the graphene microcapsule has a double-wrapped structure, the wall material 10 is methacrylonitrile, the central core ...

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Abstract

The invention provides a high-barrier polyurethane self-repairing composition and a preparation method thereof. The high-barrier polyurethane self-repairing composition comprises the following components in mass ratio: 20-30 of polyisocyanate, 55-65 of polyhydric alcohol, 3-8 of a chain extender, 5-10 of graphene microcapsules, 1-2 of an anti-aging auxiliary agent, 2-6 of talcum powder and 1-3 of acatalyzer. The graphene microcapsule is of a double-wrapping structure, a wall material is methacrylonitrile, a central core material is silica sol, and a middle core material between the wall material and the central core material is graphene oxide. The prepared high-barrier polyurethane self-repairing composition has an excellent self-repairing function, micro-mark repairing can be rapidly achieved when the high-barrier polyurethane self-repairing composition is heated, meanwhile, excellent barrier performance is achieved, erosion of external water vapor and salt can be effectively blocked, and the protection effect is better.

Description

technical field [0001] The invention belongs to the technical field of adhesive materials, and in particular relates to a high-barrier polyurethane self-repairing composition and a preparation method thereof. Background technique [0002] Polyurethane has the characteristics of wear resistance, tear resistance, sealing, sound insulation, and good processing performance. The main body is made by reacting raw materials such as isocyanate, polyether polyol, polyester polyol, and chain extender. , the performance of solvent resistance and wear resistance is not perfect. At the same time, as a protective material for the surface of airplanes, helicopters, fighter jets or wind turbine blades, automobiles, etc., polyurethane itself does not have self-repairing functions, and the protective material itself is extremely vulnerable to wind and sand. , gravel, trees, vehicle collision scratch damage, as a paint protection effect and active service life is greatly reduced. [0003] The...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/08C09D7/62
CPCC09D175/04C09D5/08C09D7/62C08K9/10C08K3/042C08K3/36Y02W90/10
Inventor 杨小青于锦张欣戎李亚兵董秀莲
Owner 江苏图研新材料科技有限公司
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