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A kind of self-flame-retardant aqueous polyurethane emulsion and preparation method thereof

A water-based polyurethane flame-retardant technology, applied in polyurea/polyurethane coatings, anti-fouling/underwater coatings, biocide-containing paints, etc., can solve the problem of harmful coatings, short flame-retardant time, and easy release of flame retardants and other problems, to achieve the effect of long-lasting self-flame retardant performance and good adhesion

Active Publication Date: 2018-10-23
UNION FOSHAN CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of flame retardants such as ammonium polyphosphate, melamine and pentaerythritol, small molecules, soluble compounds or harmful substances, there are disadvantages such as flame retardants are easy to dissociate on the surface of the coating, the flame retardant time is short, and the coating is harmful to the human body.

Method used

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  • A kind of self-flame-retardant aqueous polyurethane emulsion and preparation method thereof
  • A kind of self-flame-retardant aqueous polyurethane emulsion and preparation method thereof
  • A kind of self-flame-retardant aqueous polyurethane emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] a. 20.0 parts of polytetrahydrofuran ether diol-2000, 2.0 parts of dimethylol propionic acid, 15.0 parts of bromotoluene diisocyanate, and 20.0 parts of dibromotoluene diisocyanate were stirred at 600r / min under nitrogen protection for 80 ℃ for 2 hours, until the measured -NCO content reaches the theoretical value specified by titration with di-n-butylamine-toluene solution;

[0022] b. Keeping other conditions in a constant, cool down the system to 80°C, add 30.0 parts of butanone, then add 2.0 parts of 1,4-butanediol and 0.02 parts of dibutyltin dilaurate, and then use di-n-butyl Amine-toluene solution was used to measure the -NCO content, when the -NCO content reached the theoretical value, the bromine-modified polyurethane prepolymer was obtained;

[0023] c. Maintain the above speed, cool down the reaction system prepared in step b to 35°C, add 2.0 parts of neutralizing agent triethylamine, and neutralize for 3 minutes; then add 80.0 parts of water, then increase t...

Embodiment 2

[0025] a. 15.0 parts of polybutylene adipate diol-1500, 10.0 parts of polypropylene oxide ether diol-2100, 6.0 parts of dimethylol propionic acid, 30.0 parts of trichlorodiphenylmethane diisocyanate , under the condition of stirring at 300r / min, under the protection of nitrogen, react at 80°C for 2h, and react until the measured -NCO content reaches the theoretical value specified by titration with di-n-butylamine-toluene solution;

[0026] b. Keep other conditions in a constant, cool the system down to 60°C, add 50.0 parts of acetone, then add 10.0 parts of 1,6-hexanediol and 0.1 part of dibutyltin dilaurate, and then use di-n-butylamine -Toluene solution measures -NCO content, when -NCO content reaches theoretical value, promptly obtains bromine-modified polyurethane prepolymer;

[0027] c. Maintain the above speed, cool down the reaction system prepared in step b to 45°C, add 5.0 parts of neutralizing agent triethylamine, and neutralize for 10 minutes; then add 150.0 parts ...

Embodiment 3

[0029] a. React 20.0 parts of polycaprolactone diol, 3.2 parts of dimethylolpropionic acid, and 20.0 parts of tribromodiphenylmethane diisocyanate at 500 r / min under nitrogen protection at 90°C for 2 hours. Until the measured -NCO content reaches the theoretical value specified by di-n-butylamine-toluene solution titration;

[0030] b. Keep other conditions in a constant, cool the system down to 70°C, add 30.0 parts of N-methylpyrrolidone, then add 3.0 parts of trimethylolpropane and 0.04 parts of dibutyltin dilaurate, and then use dibutyltin dilaurate The n-butylamine-toluene solution was used to measure the -NCO content, and when the -NCO content reached the theoretical value, the bromine-modified polyurethane prepolymer was obtained;

[0031]c. Maintain the above speed, cool down the reaction system prepared in step b to 40°C, add 3.0 parts of neutralizing agent triethylamine, and neutralize for 8 minutes; then add 120.0 parts of water, then increase the speed to 1200r / min,...

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Abstract

The invention relates to a self-flame retardant type waterborne polyurethane emulsion which is characterized in that the self-flame retardant type waterborne polyurethane emulsion is prepared by using an isocyanate monomer containing an inert halogen functional group for immobilizing a halogen-containing flame retardant group on a polyurethane resin structure in a chemical bond way, so that the halogen-containing flame retardant group is unlikely to dissociate, and the synthesized polyurethane emulsion has a self-flame retardant property and can play a role of long-lasting self-flame retardant property without adding other flame retardants when the polyurethane emulsion is used for preparing a coating; the invention further provides a preparation method of the self-flame retardant type waterborne polyurethane emulsion. The self-flame retardant type waterborne polyurethane emulsion prepared by the invention has excellent adhesion and flexibility; a prepared coating film has stain resistance, water resistance, alkali resistance, durability and long-lasting self-flame retardant property; the self-flame retardant type waterborne polyurethane emulsion is widely used in flame-retardant coatings of woodware, steel structures and buildings, so as to not only play a decoration role, but also play a protection role.

Description

technical field [0001] The invention relates to a preparation method of water-based polyurethane emulsion, in particular to a preparation method of self-flame-retardant water-based polyurethane emulsion, which belongs to the technical field of water-based synthetic resin. technical background [0002] Strict environmental regulations have been enacted at home and abroad to limit the emission of volatile organic compounds (VOC) into the atmosphere. High performance and environmental protection have become the development direction of coatings. The synthesis of polyurethane resin has changed from traditional solvent-based to water-based polyurethane. Water-based polyurethane coatings use water as a solvent, which has the advantages of no pollution, safety and reliability, excellent mechanical properties, good compatibility, and easy modification. Famous for its chemical properties, it is favored by users due to its excellent performance in the field of wood lacquer and automot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/77C08G18/66C08G18/48C08G18/42C08G18/34C08G18/12C08G18/32C09D175/08C09D175/06C09D5/16C09D5/18
CPCC08G18/12C08G18/348C08G18/4018C08G18/4238C08G18/4277C08G18/4825C08G18/4854C08G18/6692C08G18/773C08L2201/02C09D5/1662C09D5/1687C09D5/18C09D175/06C09D175/08C08G18/3228C08L1/284C08K5/053C08K2003/2241
Inventor 谢义鹏许钧强康伦国姚东生孙小光周利军
Owner UNION FOSHAN CHEM
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