Preparation method of intumescent flame-retardant polyurethane

A technology of intumescent flame retardant and polyurethane, which is applied in the field of polymer materials, can solve the problems of polyurethane foam expansion and flame retardant, and achieve the effects of increasing flame retardant efficiency, low cost, and reducing fatality

Inactive Publication Date: 2021-02-05
台州耘智科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of intumescent flame-retardant polyurethane to solve the problem of polyurethane foam intumescent flame-retardant proposed in the above-mentioned background technology

Method used

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  • Preparation method of intumescent flame-retardant polyurethane

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[0019] The invention provides a preparation method of intumescent flame-retardant polyurethane, which solves the problems of dispersion and compatibility of organic flame retardants in polyurethane resins, increases the flame-retardant efficiency of flame retardants, and improves the mechanical properties of polyurethane foams , see figure 1

[0020] The preparation method of this expanded flame-retardant polyurethane comprises the steps:

[0021] S1: Raw materials: polyether trihydric alcohol: 100 parts, polyethylene oxide glycol: 10-40 parts, foaming agent urea: 3-15 parts, foaming agent carbonate organic alcohol amine salt: 2-10 parts, 2- Potassium ethylhexanoate: 0-4 parts, dibutylene dilaurate: 0-4 parts, foam stabilizer: 0-10 parts, copolymerization reaction monomer flame retardant: 15-40 parts, nano aluminum hydroxide : 0-10 parts, ammonium octamolybdate: 0-5 parts, several parts of isocyanate;

[0022] S2: Stirring and dispersing: polyether trihydric alcohol, polyet...

Embodiment 1

[0026] Add 68g (0.5mol) pentaerythritol and 226.7mL (2.5mol) phosphorus oxychloride in four-neck flask, heat up to 80 DEG C of reaction 8 hours, then heat to reflux until no HCl is emitted. Cool to room temperature, filter, wash with chloroform, anhydrous ethanol, and anhydrous ether successively, and vacuum-dry at room temperature for 12 hours to obtain a white solid as bisspirophosphoryl chloride, yield: 84%, melting point: 241-242°C .

[0027] Add 29.7g (0.1mol) double spirophosphoryl chloride and 90mL acetonitrile in a four-neck round bottom flask, add 20mL dropwise at 60°C to dissolve 12.0g (0.2mol) ethylenediamine and 30.3g (0.3mol) triethylene The acetonitrile solution of the amine was reacted for 6 hours, cooled and filtered, and the filter cake was washed with acetonitrile, distilled water and ethanol in sequence, and dried to obtain a solid that was a copolymerized reaction monomer flame retardant, with a yield of 48.2%. Structural characterization of copolymerized ...

Embodiment 2

[0029] The synthetic operation of double spiro phosphorus oxychloride is with embodiment 1, and the synthetic operation of copolymerization reaction monomer flame retardant is with embodiment 1, and in the reaction of compound and ethylenediamine that double spiro phosphorus oxychloride and ethylenediamine reaction make, The amount ratio of the compound prepared by the reaction of double spirophosphoryl chloride and ethylenediamine to ethylenediamine is 1.0:3.2, the solvent is dichloromethane, the acid binding agent is pyridine, the double spirophosphoryl chloride and ethylenediamine The ratio of the compound produced by the reaction to the acid-binding agent was 1.0:2.5, the reaction temperature was 0°C, the reaction time was 10 hours, and the yield was 32.9%.

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Abstract

The invention discloses a preparation method of intumescent flame-retardant polyurethane in the technical field of high polymer materials. The preparation method of the intumescent flame-retardant polyurethane is characterized by comprising the following steps: preparing materials, polyether triol, polyoxyethylene glycol, a foaming agent urea, a foaming agent carbonic acid organic alcohol amine salt, potassium ethylhexanoate, dibutyl dilaurate, a foam stabilizer, a copolymerization monomer flame retardant, nano aluminum hydroxide, ammonium octamolybdate and a plurality of parts of isocyanate,and stirring and dispersing: adding polyether triol, polyoxyethylene glycol, a foaming agent urea, a foaming agent carbonic acid organic alcohol amine salt, potassium 2-ethylhexanoate, dibutyl dilaurate, a foam stabilizer, a copolymerization monomer flame retardant, nano aluminum hydroxide and ammonium octamolybdate into a dispersing machine. The invention effectively solves the problems of dispersity and compatibility of the organic flame retardant in the polyurethane resin, enhances the flame-retardant efficiency of the flame retardant, and enhances the mechanical properties of the polyurethane foam plastic.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a preparation method of intumescent flame-retardant polyurethane. Background technique [0002] Polyurethane (PU) foam is a rigid, thermosetting foam formed by the reaction of isocyanate and polyol, adding a foam stabilizer, foaming agent, and curing agent. It is currently the most widely used rigid foam product. It is widely used in furniture, automobile industry, construction, transportation shock absorption, insulation and heat insulation materials. However, due to the porous structure of PU foam, the density is low, the flammable components are many, and the flame retardancy is very poor. The limiting oxygen index (LOI) is usually between 17% and 19%. At the same time, when polyurethane foam burns, it will produce a large amount of highly toxic gases such as carbon monoxide and hydrocyanic acid and smoke, which greatly limits its application. Therefore, improving ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/48C08K3/22C08K3/24C08J9/10C08J9/08C08G101/00
CPCC08G18/7671C08G18/7664C08G18/4812C08G18/4825C08G18/4829C08K3/22C08K3/24C08J9/104C08J9/08C08G2101/00C08K2003/2227C08K2201/011C08J2203/18C08J2203/04C08J2203/02
Inventor 黄国波刘义林袁康杰王军华
Owner 台州耘智科技有限公司
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