Preparation and application method of self-repairing flame-retardant molten-drop-resistant wear-resistant polyurethane coating

A polyurethane coating, self-healing technology, used in polyurea/polyurethane coatings, fire retardant coatings, epoxy resin coatings, etc.

Active Publication Date: 2022-01-21
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Polyurethane is often used as a coating during use. The coating is in contact with the human body during use, and the coating

Method used

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  • Preparation and application method of self-repairing flame-retardant molten-drop-resistant wear-resistant polyurethane coating
  • Preparation and application method of self-repairing flame-retardant molten-drop-resistant wear-resistant polyurethane coating
  • Preparation and application method of self-repairing flame-retardant molten-drop-resistant wear-resistant polyurethane coating

Examples

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Effect test

preparation example 1

[0037] The preparation method of self-repairing flame-retardant, droplet-resistant, wear-resistant polyurethane coating is characterized in that the following steps:

[0038] (1) Add 10 g of 15-micron hollow glass beads (abbreviated as HGB) and 90 mL of sodium hydroxide solution with a mass fraction of 10% in a three-neck flask protected by nitrogen, raise the temperature of the system to 70° C. and stir for 2 h to obtain the product. Wash with filtered water until neutral, then add 90g of ethanol and 10g of deionized water to the obtained suction-filtered product, and ultrasonically disperse for 30min to obtain a HGB-OH dispersion; add aminopropyltriethoxysilane to the HGB-OH dispersion for coupling Add 0.1 g of 4-bromoaniline and 0.1 g of 4-bromoaniline, heat up to 70 ° C and stir for 2 h, then filter with suction, wash with 15 mL of ethanol in the Buchner funnel three times during the suction filtration (that is, wash with 15 mL of ethanol for each suction filtration, the sa...

preparation example 2

[0048] The preparation method of self-repairing flame-retardant, droplet-resistant, wear-resistant polyurethane coating is characterized in that the following steps:

[0049](1) Add 10 g of 65-micron hollow glass beads (abbreviated as HGB) and 90 mL of potassium hydroxide solution with a mass fraction of 10% in a three-necked flask protected by nitrogen, raise the temperature of the system to 85 ° C and stir for 3 h, and the obtained product is suction-filtered Wash with water until neutral, then add 90g of ethanol and 10g of deionized water to the obtained suction filtration product, and ultrasonically disperse for 40min to obtain a HGB-OH dispersion; add aminopropyltriethoxysilane coupling agent to the HGB-OH dispersion 0.2g and 0.1g of 4-bromoaniline, heated up to 85°C and stirred for 3h, then filtered with suction, washed three times with 15mL of ethanol in the Buchner funnel during the suction filtration, and dried the product in vacuum at 70°C for 14h to obtain HGB-NH 2 ...

preparation example 3

[0059] The preparation method of self-repairing flame-retardant, droplet-resistant, wear-resistant polyurethane coating is characterized in that the following steps:

[0060] (1) Add 10 g of 40-micron hollow glass beads (abbreviated as HGB) and 90 mL of sodium hydroxide solution with a mass fraction of 10% in a nitrogen-protected reaction vessel, raise the temperature of the system to 75° C. and stir for 2.5 h, and the obtained product is pumped Wash with filtered water until neutral, then add 90 g of ethanol and 10 g of deionized water to the obtained suction filtration product, and disperse it ultrasonically for 35 minutes to obtain a HGB-OH dispersion; add aminopropyltriethoxysilane to the HGB-OH dispersion for coupling Add 0.15 g of 4-bromoaniline and 0.1 g of 4-bromoaniline, raise the temperature to 75 ° C and stir for 2.5 h, then filter with suction, wash three times with 15 mL of ethanol in the Buchner funnel during the suction filtration, and dry the product in vacuum a...

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Abstract

The invention relates to a preparation and application method of a self-repairing flame-retardant melt-drop-resistant wear-resistant polyurethane coating, the method comprises the following steps: loading isocyanate on vacuum glass beads HGB-DI, adding polypropylene glycol, polytetrahydrofuran glycol, isophorone diisocyanate and HGB-DI into a reaction container under the protection of nitrogen, heating the system to 80 DEG C, adding a solvent into a reaction kettle, adding dibutyltin dilaurate, a chain extender 2, 2-dithiodiethanol and a nitrogen-phosphorus intumescent flame retardant, cooling to 50-70 DEG C, and adding a thickening agent N, N-diethyl formamide; then cooling to 40 DEG C, adding triethylamine to obtain a transparent viscous liquid, cooling to room temperature, and adding deionized water, epoxy resin E51, trimethylolpropane trimethacrylate and 3, 4 '-diaminodiphenyl ether to finally obtain the polyurethane emulsion, and the obtained polyurethane emulsion is obviously superior to the prior art in flame-retardant self-repairing, molten drop resistance and wear resistance.

Description

technical field [0001] The invention relates to a preparation method of a polyurethane coating, in particular to a preparation method of a self-repairing flame-retardant, drop-resistant, wear-resistant polyurethane coating, and also relates to an application method of the prepared polyurethane coating. Background technique [0002] Water-based polyurethane has the advantages of safety, harmlessness and strong adhesion, and is widely used in furniture, fabric coating, automobile leather and other fields. When water-based polyurethane is used as a coating material, it is often subjected to friction, collision, bending, etc. Physical damage such as scratches and micro-cracks will appear on the surface, which will lead to damage to the coating, loss of function, and shortened service life. Self-healing polymer materials have the ability to repair external physical damage by relying on their own structure. After the polymer material drops, it relies on its own structure to repair...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D163/02C08G18/38C08G18/48C08G18/66C09D5/18C09D7/62C09D7/65
CPCC09D175/08C09D5/185C09D7/65C09D7/62C09D7/70C08G18/4854C08G18/4825C08G18/4808C08G18/6674C08G18/3876C08L63/00C08L79/02C08K7/28C08K9/04C08K9/06C08K5/55
Inventor 段宝荣李国荣唐志海翁永根冯练享于涵王全杰王琦研扈乐成
Owner YANTAI UNIV
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