Flame-retardant phosphate-containing diol modified polyurethane coating and preparation method thereof

A technology of polyurethane coating and phosphate ester, applied in the direction of polyurea/polyurethane coating, fireproof coating, coating, etc., can solve the problems of reducing the mechanical properties and mechanical properties of polyurethane materials, poor compatibility of polyurethane, and large amount of additives, etc. The effect of thermal decomposition temperature and thermal stability, increasing flame retardancy, and improving char formation rate

Inactive Publication Date: 2019-11-12
郝立勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a flame-retardant phosphate-containing diol-modified polyurethane coating and its preparation method, which solves the problems of low ignition point and poor flame retardancy of traditional polyurethane, and at the same time through the reaction The copolymerization type flame retardant method solves the problem that the addition type flame retardant method has a large amount of additives, poor compatibility with polyurethane, and reduces the mechanical properties and mechanical properties of polyurethane materials.

Method used

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  • Flame-retardant phosphate-containing diol modified polyurethane coating and preparation method thereof
  • Flame-retardant phosphate-containing diol modified polyurethane coating and preparation method thereof
  • Flame-retardant phosphate-containing diol modified polyurethane coating and preparation method thereof

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preparation example Construction

[0026] In order to achieve the above objective, the present invention provides the following technical solution: a flame-retardant phosphate-containing glycol-modified polyurethane coating and its preparation method, including the following raw materials in parts by weight: 6-14 parts 4,4' -Dihydroxydiphenyl sulfone, 3-7 parts of hydroxyethylene diphosphonic acid, 0.2-0.5 parts of esterification catalyst, 45-70 parts of polyoxypropylene glycol, 15-20 parts of 2,4-toluene diisocyanate, 0.8-1.5 parts 1,5-pentanediol, 2-4 parts dihydroxybutyric acid, 0.5-1 parts synergistic catalyst, 2-5 parts neutralizer, 0.5-2 parts chain extender, 4,4'-two The molecular formula of hydroxydiphenyl sulfone is C 12 H 10 O 4 S, its structural formula is The molecular formula of hydroxyethylene diphosphonic acid is C 2 H 8 O 7 P 2 , The structural formula is The esterification catalyst is dicyclohexylcarbodiimide, the molecular formula is C 13 H 22 N 2 , The structural formula is Polyoxypropylene ...

Embodiment 1

[0035] (1) Preparation of bishydroxydiphenylsulfone ethylene bisphosphonate compound: pass N into a 500mL three-necked flask 2 , And add 150mL N-methylpyrrolidone, and then weigh 6 parts of 4,4'-dihydroxydiphenyl sulfone, 3 parts of hydroxyethylene diphosphonic acid and 0.2 parts of dicyclohexylcarbodiimide into three In the neck flask, place the three-necked flask in an oil bath, heat to 150-155°C, stir the reaction at a constant speed for 12-15h, cool to room temperature after the reaction, and concentrate the solution in the three-necked flask on a rotary evaporator under reduced pressure. It is separated by thin-layer chromatography through a silica gel chromatography column. The eluent is petroleum ether: ethyl acetate=2:1. The product is enriched and decompressed by a rotary evaporator and filtered by an oil pump for vacuum distillation to remove the eluent. , The product bishydroxydiphenylsulfone ethylene bisphosphonate compound component 1 is obtained, and the reaction e...

Embodiment 2

[0040] (1) Preparation of bishydroxydiphenylsulfone ethylene bisphosphonate compound: pass N into a 500mL three-necked flask 2 , And add 150mL N-methylpyrrolidone, and then weigh 8 parts of 4,4'-dihydroxydiphenyl sulfone, 4 parts of hydroxyethylene diphosphonic acid and 0.3 parts of dicyclohexylcarbodiimide into three parts. In the neck flask, place the three-necked flask in an oil bath, heat to 150-155°C, stir the reaction at a constant speed for 12-15h, cool to room temperature after the reaction, and concentrate the solution in the three-necked flask on a rotary evaporator under reduced pressure. It is separated by thin-layer chromatography through a silica gel chromatography column. The eluent is petroleum ether: ethyl acetate=2:1. The product is enriched and decompressed by a rotary evaporator and filtered by an oil pump for vacuum distillation to remove the eluent. , The product bishydroxydiphenylsulfone ethylene bisphosphonate compound component 2 is obtained, and the rea...

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Abstract

The invention relates to the technical field of flame-retardant water-based polyurethane, and discloses a flame-retardant phosphate-containing diol modified polyurethane coating and a preparation method thereof. The coating comprises the following raw materials in parts by weight: 4,4'-dihydroxydiphenylsulfone, hydroxyethylidene diphosphonic acid, an esterification catalyst, polypropylene oxide glycol, 2,4-toluene diisocyanate, 1,5-pentanediol, dihydroxybutyric acid, a synergistic catalyst, a neutralizer and a chain extender. According to the flame-retardant phosphate-containing diol modifiedpolyurethane coating and the preparation method provided by the invention, polyurethane is modified by using dihydroxydiphenylsulfonyl ethylidene diphosphonate-diol, phosphorus and nitrogen elements are introduced into a molecular chain of a water-based polyurethane polymer to form O=S=O with higher energy and better thermal stability and an aromatic benzene ring group, so that the charring rate of the polyurethane is improved, the combustibility of the polyurethane is reduced, and the water-based polyurethane coating has higher thermal stability and flame-retardant effects.

Description

Technical field [0001] The invention relates to the technical field of flame-retardant waterborne polyurethane, in particular to a flame-retardant modified polyurethane coating containing phosphate glycol and a preparation method thereof. Background technique [0002] Water-based polyurethane is a new type of polyurethane system in which water replaces organic solvents as the dispersion medium. Water-based polyurethane has the advantages of environmental protection, safety and reliability, excellent mechanical properties, and good compatibility. The application of water-based polyurethane in textile and dyeing auxiliaries is increasing. Widely used, such as dyeing auxiliary, pigment printing adhesive, softening and anti-wrinkle finishing agent, antistatic and hydrophilic finishing agent, etc., which can improve its dyeing depth, fastness and other properties of textiles. Waterborne polyurethane is also widely used Used in petroleum demulsifiers, adhesives, wetting agents, pore le...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/38C08G18/32C08G18/34C09D175/08C09D5/18
CPCC08G18/3891C08G18/4825C08G18/6674C08G18/6685C08G18/6692C08G18/7614C09D5/18C09D175/08
Inventor 郝立勇
Owner 郝立勇
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