Self-repairing antibacterial polyurethane coating and preparation method thereof

A polyurethane coating, self-healing technology, applied in polyurea/polyurethane coatings, coatings, anti-corrosion coatings, etc., can solve the complex preparation process, high cost, coating transparency and film-forming effects of the microcapsule repair method, etc. question

Pending Publication Date: 2021-12-14
卢超
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of the microcapsule repair method is complicated, the cost is high, and the application of the coating has great limitations, and it cannot be repaired multiple times; the thermal reversible repair method requires a specific repair environment or condition, and the transparency of the coating and film-forming properties are easily affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of self-healing antibacterial polyurethane coating, by weight parts, mainly comprises:

[0031] 19 parts of amino silicone oil, 3.04 parts of polyethylene glycol, 11 parts of isophorone diisocyanate, 1 part of hydrogen peroxide, 19 parts of N,N-dimethylformamide, and 5 parts of modified graphene.

[0032] A kind of preparation method of self-repairing antibacterial polyurethane coating, the preparation method of described self-repairing antibacterial polyurethane coating is:

[0033] (1) Mix α, ω dihydroxypolydimethylsiloxane and 2,3-epoxypropyltrimethylammonium chloride with 0.3 times the mass of α, ω dihydroxypolydimethylsiloxane In a three-neck flask, stir evenly and heat to 80°C, keep warm for 20 minutes, then add N-β-aminoethylγ-aminopropyl trimethylsiloxane and α,ωdihydroxypolydimethylsiloxane 8 times the mass of triethylamine with a mass fraction of 3%, after stirring evenly, heat to 120°C, keep it warm for 10h, adjust the pressure to 0.01MPa, and continu...

Embodiment 2

[0043] A kind of self-healing antibacterial polyurethane coating, by weight parts, mainly comprises:

[0044] 38 parts of amino silicone oil, 6.46 parts of polyethylene glycol, 22.6 parts of isophorone diisocyanate, 2 parts of hydrogen peroxide, 38 parts of N,N-dimethylformamide, and 10 parts of modified graphene.

[0045] A kind of preparation method of self-repairing antibacterial polyurethane coating, the preparation method of described self-repairing antibacterial polyurethane coating is:

[0046] (1) Mix α, ω dihydroxypolydimethylsiloxane and 2,3-epoxypropyltrimethylammonium chloride with 0.5 times the mass of α, ω dihydroxypolydimethylsiloxane In a three-necked flask, stir evenly and heat to 120°C, keep warm for 20 minutes, then add N-β-aminoethylγ-aminopropyl trimethylsiloxane and α,ωdihydroxy polydimethylsiloxane 10 times the mass of triethylamine with a mass fraction of 2%, after stirring evenly, heat to 120°C, keep warm for 10h, adjust the pressure to 0.01MPa, and c...

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Abstract

The invention discloses a self-repairing antibacterial polyurethane coating and a preparation method thereof, and relates to the field of polyurethane coatings. When the self-repairing antibacterial polyurethane coating is prepared, amino silicon oil, polyester polyol and isocyanate are used for jointly preparing a polyurethane coating material, then modified graphene is added, the self-repairing antibacterial polyurethane coating material is prepared, and finally coating is conducted. The amino silicon oil is prepared by adding 2, 3-epoxypropyl trimethyl ammonium chloride to react when the amino silicon oil is prepared; and the modified graphene is prepared by grafting 2-(N, N-dimethylamino) ethylamino dithiocarboxylic acid onto graphene oxide and then performing reduction. The self-repairing antibacterial polyurethane coating prepared by the preparation method disclosed by the invention not only has self-repairing antibacterial capability, but also has relatively good water resistance and hydrophobicity.

Description

technical field [0001] The invention relates to the field of polyurethane coatings, in particular to a self-repairing antibacterial polyurethane coating and a preparation method thereof. Background technique [0002] Polyurethane is a general term for a class of polymer compounds whose main chain contains urethane units. It is a multi-block polymer formed by the gradual polymerization of polyols, small molecule chain extenders and polyisocyanates. The polyol constitutes the soft segment, and the small molecule chain extender and polyisocyanate constitute the hard segment. By adjusting the composition and ratio of the soft and hard segments, the molecular structure and physical and chemical properties of polyurethane can be effectively controlled. [0003] At present, self-healing polyurethane materials have been reported, and their self-healing mechanisms mainly include: thermal reversible repair, photoreversible repair and microcapsule repair. The preparation process of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D5/14C09D5/08C09D7/62C08G18/61C08G18/48
CPCC09D175/08C09D5/14C09D5/08C09D7/62C08G18/61C08G18/48C08K9/04C08K3/042
Inventor 卢超
Owner 卢超
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