Modified polyurethane resin coating and preparation method thereof

A polyurethane resin and coating technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of no stimulus-responsive release of corrosion inhibitors, coating foaming, and damage to coating integrity. Achieve superior coating function and stability, high yield effect

Inactive Publication Date: 2016-03-23
中山新隆昌化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this direct incorporation method sometimes does not provide sufficient protection, and the corrosion inhibitor is in direct contact with the coating. In most cases, this system does not have the ability to release the corrosi

Method used

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  • Modified polyurethane resin coating and preparation method thereof

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preparation example Construction

[0015] The preparation method of this coating is as follows:

[0016] 1) Add 60-80 parts of toluene diisocyanate, 5-10 parts of dicyclohexylmethane diisocyanate, 5-10 parts of hexamethylene diisocyanate, and 5-10 parts of ethyl acetate into the reaction kettle, and use a mixer to fully stir, Raise the temperature to 90-100°C, slowly add 4-8 parts of adipic acid;

[0017] 2) Continue to add 1-5 parts of alkyd resin, 2-4 parts of epoxy resin, stir well for more than 1 hour,

[0018] 3) Add chain extender, activator and catalyst: Add 1-3 parts of propylene glycol, 1-3 parts of methyldiethanolamine, 1-4 parts of dibutyltin diesterate, and 0.5-1 part of phosphoric acid in four equal intervals of 30 minutes , then keep warm at 80 degrees Celsius for more than 4 hours, add ionized water for emulsification for more than 30 minutes;

[0019] 4) The polymer nanoparticles coated with benzotriazole are dispersed and mixed in the above emulsion by ultrasonic dispersion, fully stirred and...

Embodiment 1

[0026] Polyurethane resin-nanoparticle composite coating is made from the following raw materials according to the weight ratio: 60 parts of toluene diisocyanate, 5 parts of dicyclohexylmethane diisocyanate, 5 parts of hexamethylene diisocyanate, 4 parts of adipic acid, alkyd resin 1 part, 2 parts of epoxy resin, 1 part of propylene glycol, 1 part of methyldiethanolamine, 1 part of dibutyltin diesterate, 6 parts of ethyl acetate, 0.5 part of phosphoric acid, 15 parts of deionized water; and 8 parts of polymer nanoparticles share. The preparation method is as described above.

Embodiment 2

[0028] Polyurethane resin-nanoparticle composite coating is made from the following raw materials according to the weight ratio: 70 parts of toluene diisocyanate, 10 parts of dicyclohexylmethane diisocyanate, 10 parts of hexamethylene diisocyanate, 8 parts of adipic acid, alkyd resin 3 parts, 4 parts of epoxy resin, 3 parts of propylene glycol, 2 parts of methyldiethanolamine, 4 parts of dibutyltin diester, 10 parts of ethyl acetate, 0.5 parts of phosphoric acid, 30 parts of deionized water; and 10 parts of polymer nanoparticles share. The preparation method is as described above.

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Abstract

The invention discloses a modified polyurethane resin coating, which is made from raw materials with parts by weight: toluene diisocynate 60-80 parts, dicyclohexylmethane diisocyanate 5-10 parts, hexamethylene diisocyanate 5-10 parts, hexanedioic acids 4-8 parts, alkyd resins 1-5 parts, epoxy resins 2-4 parts, propylene glycol 1-3 parts, methyldiethanolamine 1-3 parts, di-n-butyltin diester 1-4 parts, acetic ethers 5-10 parts, phosphoric acids 0.5-1 part, deionized water 10-30 parts and polymer nanoparticles 8-16 parts. The modified polyurethane resin coating combines the polymer nanoparticles and a coating, disperses in modified polyurethane resins, forms an effective corrosion resistant composite coating, and has the excellent performance of oil resistivity, seawater resistant, wear resistance and impact resistance and the like.

Description

technical field [0001] The invention relates to a modified polyurethane resin coating and a preparation method thereof. Background technique [0002] The water-based polyurethane resin has gradually replaced the solvent-based and has become an important direction for the development of the polyurethane industry. Polyurethane can be widely used in coatings, adhesives, fabric coating and finishing agents, leather finishing agents, paper surface treatment agents and fiber surface treatment agents. Waterborne polyurethane emulsion is not only a relatively environmentally friendly coating, but also has excellent properties such as oil resistance, seawater resistance, abrasion resistance and impact resistance. At present, the polyurethane formula is designed and adjusted to meet the requirements of actual use, and high-performance water-based polyurethane can be prepared by combining nano-hybrid technology. Polyurethane or modified polyurethane is the main film-forming substance...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D5/08C08G18/68C08G18/65C08F220/14C08F220/06C08F220/18C08F212/08C08F2/44
CPCC08F2/44C08F220/14C08G18/6511C08G18/6535C08G18/6541C08G18/68C09D5/08C09D175/14C08L33/12C08K5/3475C08F220/06C08F220/1804C08F212/08
Inventor 董晓娜
Owner 中山新隆昌化工有限公司
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