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A kind of preparation method of waterborne polyurethane coating

The technology of coating and hexamethylene diisocyanate is applied in the field of preparation of flame retardant coatings, can solve problems such as fire safety and hidden danger, and achieve the effect of simple preparation process

Active Publication Date: 2016-08-24
山东扬名新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water-based polyurethane is mainly used in leather finishing, textile printing and dyeing, papermaking, architectural coatings, adhesives, etc. Almost all of the materials involved are flammable materials. If these materials are not treated with flame retardant, they will inevitably become a fire hazard.

Method used

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  • A kind of preparation method of waterborne polyurethane coating
  • A kind of preparation method of waterborne polyurethane coating

Examples

Experimental program
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Effect test

example 1

[0015] (1), in the 500ml four-necked flask that stirring blade, thermometer, condenser tube are housed, chloral hydrate 16.5g is mixed with hexamethylene diisocyanate 33.3g, dibutyltin dilaurate catalyst 0.249g Under the condition of existence, react at 70°C for 1 h to obtain 49.9g of polyurethane prepolymer A;

[0016] (2) Add 0.96 g of hydrophilic chain extender maleic acid, 5.24 g of hydroxysilane with a number average molecular weight of 600 g / mol and 4.99 g of pyridine to product A, and react at 65° C. for 1.5 h to obtain product B;

[0017] (3) Add 1.0g of dihydroxydimethylmelamine to product B, react at 65°C for 1 hour, add 2.79g of triethylamine for neutralization reaction for 30 minutes, add 140g of water for emulsification to form 202.2g of flame-retardant polyurethane C .

example 2

[0019] (1), in a 500ml four-necked flask equipped with a stirring blade, a thermometer, and a condenser tube, mix 22.2g of n-butylbis(hydroxypropyl)phosphine oxide with 75.6g of hexamethylene diisocyanate, In the presence of 0.88 g of dibutyltin catalyst, react at 90°C for 3 h to obtain 97.6 g of polyurethane prepolymer A;

[0020] (2) Add 4.48 g of succinic acid, 15.1 g of hydroxysilane with a number average molecular weight of 1000 g / mol and 19.5 g of cyclohexanone to product A, and react at 95°C for 3.5 h to obtain product B;

[0021] (3) Add 5.86g of diethanolamine to the product B, the reaction temperature is 85°C, the reaction time is 3h, 6.39g of triethylamine is added for neutralization reaction for 70 minutes, and 130g of water is added for emulsification to form 275g of flame-retardant polyurethane C.

example 3

[0023] (1), in the 500ml four-neck flask that stirrer blade, thermometer, condensation pipe are housed, chloral hydrate 16.5g is mixed with hexamethylene diisocyanate 66.6g, dibutyltin dilaurate catalyst 0.58g Under the condition of existence, react at 80°C for 2 h to obtain 83g of polyurethane prepolymer A;

[0024] (2), 1.66g of oxalic acid, 10.8g of hydroxysilane with a number average molecular weight of 800 g / mol and 12.5g of N,N-dimethylacetamide were added to product A, and reacted at 75°C for 2.5 h to obtain product B;

[0025] (3) Then add 3.32g of dihydroxydimethylmelamine to B, the reaction temperature is 75°C, the reaction time is 2h, add 4.1g of triethylamine for neutralization reaction for 50 minutes, add 140g of water for emulsification, and form 245.9g of flame retardant Polyurethane C;

[0026] Table 1 and Table 2 are the performance indicators obtained by the film formation of the coating prepared in Example 2 of the present invention.

[0027] The flame re...

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Abstract

The invention discloses a method for preparing a paint. In the presence of a dibutyltin dilaurate catalyst, dihydric alcohol is mixed with hexamethylene diisocyanate, and reacted at 70-90°C for 1.0-3.0 hours to obtain polyurethane Prepolymer: add hydrophilic chain extender, hydroxysilane and organic solvent to polyurethane prepolymer, react at 65~95℃ for 1.5~3.5h, add nitrogen-containing compound and react at 65~85℃ for 1~3h, According to the molar ratio of COOH / NH2 of 0.6:1~1.2:1, triethylamine is added for neutralization reaction for 30~70min, and water is added for emulsification to form a flame retardant coating. The prepared flame-retardant coating is environmentally friendly and low in price, and can meet market demand.

Description

[0001] This application is a divisional application, the application number of the original application: 201310094271.3, the application date: 2013-03-22, the title of the invention: a method for preparing a flame-retardant coating. technical field [0002] The invention relates to a method for preparing a coating, in particular to a method for preparing a flame-retardant coating. Background technique [0003] Water-based polyurethane is an important research direction for coatings. It (also known as water-based polyurethane) is a polyurethane resin containing hydrophilic groups in the molecular chain of polyurethane. It has a strong affinity with water and adopts a specific process. Can make it dispersed in water and form a stable system. Water-based polyurethane is mainly used in leather finishing, textile printing and dyeing, papermaking, architectural coatings, adhesives, etc. Almost all of the materials involved are flammable materials. If these materials are not treate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D5/18C08G18/32C08G18/34C08G18/10
CPCC08G18/0823C08G18/3275C08G18/341C08G18/3808C08G18/3851C08G18/388C08G18/73C08G18/8054C09D5/18C09D175/04
Inventor 王伟民高筱刚季利宏
Owner 山东扬名新材料技术有限公司
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