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Preparation method of inflaming retarding type aqueous polyurethane coating

A water-based polyurethane, flame-retardant technology, applied in polyurea/polyurethane coatings, fire-resistant coatings, coatings, etc., can solve the problems of polyurethane performance, easy-to-corrosion equipment, and a large amount of smoke, and achieve fire, smoke, and flame retardancy Effect, smoke reduction, flame retardant and cost-effective effect

Active Publication Date: 2014-09-10
广东新灏元科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when polyurethane modified by brominated flame retardants burns, it produces a lot of smoke and is easy to corrode equipment, so it is subject to certain restrictions.
However, the flame-retardant water-based polyurethane currently on the market in my country is mainly of the blended compound type, and the flame-retardant effect is achieved by adding a large amount of flame retardant. This method is costly and has a great impact on the performance of polyurethane.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be further described below in conjunction with examples.

example 1

[0020] (1), in the 500ml four-necked flask that stirring blade, thermometer, condenser tube are housed, add 0.3g dibutylboron trifluoromethanesulfonate, 1,4-bis(dimethylhydroxysilyl)benzene 66g and 33g of hexamethylene diisocyanate was reacted at 80°C for 2 hours, then 0.99g of parathion was added into a four-neck flask, the reaction temperature was 80°C, and the reaction time was 40min, to obtain 99.8g of polyurethane prepolymer;

[0021] (2), add 1.4g of diphenyldihydroxysilane and 16g of butanone to the polyurethane prepolymer, stir and react at 65°C for 3h, add 9.98g of triethylamine for neutralization reaction for 10min, add 160g of water for emulsification, Forming a kind of waterborne polyurethane 282g that solid content is 35.4%, transfers in the 500ml beaker for subsequent use;

[0022] (3) Add 3g of aluminum diphenylphosphinate, 27g of water and 0.45g of N,N-dimethylaminopropylamine into a 50ml beaker, and ultrasonically pulverize for 20min at a temperature of 30°C a...

example 2

[0025] (1) In a 500ml four-necked flask equipped with a stirring blade, a thermometer and a condenser tube, add 0.7g of dibutylboron trifluoromethanesulfonate, 66g of 1,4-bis(dimethylhydroxysilyl)benzene and 33g of hexamethylene diisocyanate was reacted at 110°C for 4h, then 1.39g of parathion was added into a four-neck flask, the reaction temperature was 110°C, and the reaction time was 60min to obtain 100.5g of polyurethane prepolymer;

[0026] (2) Add 2.8 g of 4,4'-bis(dimethylhydroxysilyl)diphenyl ether and 24.1 g of methyl ethyl ketone to the polyurethane prepolymer, stir and react at 85°C for 5 hours, and add 20.1 g of triethylamine g carry out neutralization reaction 40min, add water 150g and carry out emulsification, form a kind of solid content and be 295g of water-based polyurethane of 35%, transfer to standby in the 500ml beaker;

[0027] (3) Add 3g of aluminum dipropylphosphinate, 27g of water and 0.54g of sodium dodecylbenzenesulfonate into a 50ml beaker, and ultr...

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PUM

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Abstract

The invention discloses a preparation method of an inflaming retarding type aqueous polyurethane coating. Under the condition that dibutylboron trifluoromethanesulfonate catalysts exist, 1,4-Bis(hydroxydimethylsily)benzene and hexamethylene diisocyanate are mixed by a weight ratio of 2:1 and react for 2-4 hours at 80-110 DEG C, then parathion is added into a reaction system, the reaction temperature is 80-110 DEG C, the reaction time is 40-60 minutes, and a polyurethane prepolymer is obtained; chain extenders and butanone are added into the polyurethane prepolymer and are stirred for 3-5 hours at 65-85 DEG C, trithylamine is added for neutral reaction for 10-40 minutes, water is added for emulsification, and aqueous polyurethane is formed; aluminum salt dispersion liquid, L-pyroglutamic acid, screw ring phosphoryl nafoxidine ester and N-aminoethyl-3-aminopropyl triethoxysilane are added into the aqueous polyurethane and are sheared and stirred for 40-80 minutes under the condition of pH being 7, and the inflaming retarding type aqueous polyurethane coating is obtained. The flammability and mechanical property of the obtained polyurethane coating are greatly improved.

Description

technical field [0001] The invention relates to a preparation method of water-based polyurethane paint, in particular to a preparation method of flame-retardant water-based polyurethane paint. Background technique [0002] Water-based polyurethane (also known as water-based polyurethane) is a polyurethane resin containing hydrophilic groups in the molecular chain of polyurethane, which has a strong affinity with water. It can be dispersed in water and formed by using a specific process. stable system. Waterborne polyurethane is mainly used in leather finishing, textile printing and dyeing, papermaking, architectural coatings, adhesives, cast steel coatings, etc. Almost all of the materials involved are flammable materials. If these materials are used without flame retardant treatment, they will inevitably become fire hazards Fire safety hazard. The flame retardancy of waterborne polyurethane is one of the important directions of functionalization of waterborne polyurethane...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/18C08G18/32C08G18/10
Inventor 朱蕾
Owner 广东新灏元科技有限公司
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