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Flame-resistant type polyurethane emulsion and preparation method thereof

A polyurethane emulsion, flame-retardant technology, applied in the field of fine polymers, can solve the problems of affecting the service life and reducing the flame-retardant effect, and achieve good flame-retardant and excellent physical properties

Inactive Publication Date: 2017-04-26
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the diffusion and migration of small molecule flame retardants in the use of products, the flame retardant effect will be greatly reduced, and the service life will be affected at the same time.

Method used

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  • Flame-resistant type polyurethane emulsion and preparation method thereof
  • Flame-resistant type polyurethane emulsion and preparation method thereof
  • Flame-resistant type polyurethane emulsion and preparation method thereof

Examples

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preparation example Construction

[0045] The raw materials for the preparation of the flame-retardant polyurethane emulsion provided by the present invention also include 4 to 9 parts by mass of 2,2-dimethylol propionic acid (DMPA), preferably 5 to 8 parts by mass, more preferably 6 to 7 parts by mass .

[0046] The raw materials for preparing the flame-retardant polyurethane emulsion provided by the present invention further include 25-56 parts by mass of diisocyanate, preferably 30-50 parts by mass, more preferably 35-45 parts by mass. The diisocyanate is selected from one or more of isophorone diisocyanate, hexamethylene diisocyanate, toluene diisocyanate and diphenylmethane diisocyanate; more preferably, the diisocyanate is isophorone A combination of ketone diisocyanate and hexamethylene diisocyanate.

[0047] The raw materials for preparing the flame-retardant polyurethane emulsion provided by the present invention further include 0.1-0.5 parts by mass of catalyst, preferably 0.2-0.4 parts by mass, more p...

Embodiment 1

[0072] Take a certain amount of DMC catalyst, 2.5L propylene oxide and relative molecular mass regulator DPG and add it to a dry 5L high-pressure reactor, seal the reactor, turn on the stirring device, and add 1.3kgCO 2 , heated up to 60°C while stirring, reacted for 12h and discharged to obtain polypropylene carbonate diol.

[0073] The number average molecular weight of the polypropylene carbonate diol was determined to be 3000, the hydroxyl functionality was 2, and the mole fraction of carbonate groups in the molecule was 30%.

[0074] Take 100 parts of the polypropylene carbonate diol prepared in Example 1, add it into a glass reactor with a vacuum device, vacuum dehydrate it at 120°C for 2 hours, lower it to normal temperature, and add 2,2-dimethylol propionic acid 7 parts, add 25 parts of N,N-dimethylamide, add 43 parts of hexamethylene diisocyanate and isophorone diisocyanate, 0.3 parts of stannous isooctanoate, react at 80 degrees for 3-4 hours, add flame retardant 11...

Embodiment 2

[0076] Take 100 parts of the polypropylene carbonate diol prepared in Example 1, add it into a glass reactor with a vacuum device, vacuum dehydrate it at 120°C for 2 hours, lower it to normal temperature, and add 2,2-dimethylol propionic acid 9 parts, add 25 parts of N,N-dimethylamide, add 52 parts of hexamethylene diisocyanate and isophorone diisocyanate, 0.32 parts of stannous isooctanoate, react at 80 degrees for 3-4 hours, add flame retardant 14 parts of N, N-di(2-hydroxyethyl)aminomethylphosphonic acid diethyl ester, react for 10-20 minutes. Lower the temperature by 30 degrees, add 6.8 parts of triethylamine for neutralization, add 380 parts of deionized water to emulsify to obtain component A, and finally add 10 parts of deionized water and 1 part of ethylenediamine to mix uniformly for component B. The chain is extended for 20-30 minutes to obtain a flame-retardant polyurethane emulsion.

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Abstract

The invention provides a flame-resistant type polyurethane emulsion. The flame-resistant type polyurethane emulsion is prepared from the following raw materials in parts by mass: 100 parts by mass of polypropylene carbonate neopentyl glycol, 4-9 parts by mass of 2,2-dimethylol propionic acid, 25-56 parts by mass of diisocyanate, 0.1-0.5 part by mass of a catalyst, 11-17 parts by mass of N, N-bis(2-hydroxyethyl)aminomethyl phosphonic acid diethyl ester, 2-18 parts by mass of a salt-forming agent, 10-30 parts by mass of an organic solvent, 0.55-1 part by mass of a chain extender and 320-430 parts by mass of deionized water. According to the flame-resistant type polyurethane emulsion disclosed by the invention, phosphate ester is introduced in a molecule main chain, through compounding of phosphate ester and carbonic ether, few phosphate ester compounds are used, and a good flame resistant effect can be achieved. A carbon dioxide copolymer polyalcohol is used as a soft segment, and hydrolysis-resistant; and besides, the molecule of the carbon dioxide copolymer polyalcohol contains a large quantity of ester bonds and ether bonds, so that intramolecular and intermolecular hydrogen bonds can be formed, and the aqueous polyurethane emulsion having favorable physical properties can be obtained.

Description

technical field [0001] The invention belongs to the technical field of fine polymers, and in particular relates to a flame-retardant polyurethane emulsion and a preparation method thereof. Background technique [0002] At present, in the coatings market, oil-based coatings occupy a dominant position. However, in the use of oil-based paints, a large amount of solvents will be used, and a large amount of VOC will be released, which will have a great impact on environmental protection. As the market has higher and higher requirements for environmental protection of materials, water-based coatings have developed rapidly due to their low VOC emissions. Water-based polyurethane coatings have the characteristics of high strength, good scratch resistance, high service temperature range and wide application range, and have been widely used. [0003] There are many requirements for flame retardancy in the application field of waterborne polyurethane. At present, the flame retardancy...

Claims

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Application Information

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IPC IPC(8): C08G18/75C08G18/73C08G18/66C08G18/44C08G18/34C08G18/32C08G18/12C08G64/34C09J175/04
CPCC08G18/755C08G18/12C08G18/348C08G18/388C08G18/44C08G18/6659C08G18/722C08G18/73C08G64/34C08G2170/80C09J175/04C08G18/3228
Inventor 麻乐刘保华冼文琪丁鹄兰王恒
Owner GUANGDONG UNIV OF TECH
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