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Flame-retardant polyurethane material and preparation method thereof

A technology of polyurethane materials and prepolymers, which is applied in the field of polymer materials to achieve good flame-retardant and heat-insulating properties, improved tensile strength, and stable performance

Active Publication Date: 2019-10-15
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polymer prepolymer synthesized using cyanuric acid as a raw material is a low-carbon material, and there is no report on the use of this low-carbon material to prepare polyurethane materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of flame-retardant polyurethane material, comprising the steps of:

[0030] (1) Mix 129g of cyanuric acid and 213g of ethanolamine, add 5g of 5A molecular sieve, stir and react at 260°C for 4 hours, and when the viscosity of the material is 1000mPa.s, stop the reaction, remove water, and obtain cyanuric acid polyol Amine prepolymer;

[0031] (2) Add 80g of toluene diisocyanate and 5g of silicone oil into the reactor, stir, heat up to 80-100°C, and add the polyolamine cyanurate prepolymer prepared in step (1) into the reactor in batches , the mass ratio of the amount of prepolymer added to toluene diisocyanate is 0.8:1, and the heat preservation reaction is carried out for 1 hour after each addition until the mass ratio of the total amount of cyanuric acid polyolamine prepolymer added to toluene diisocyanate is 3.2 : 1; After the reaction is completed, add 10g of triethylenediamine, continue to react for 1h, and after cooling down to below 80°C, pou...

Embodiment 2

[0033] A preparation method of flame-retardant polyurethane material, comprising the steps of:

[0034] (1) Mix 129g of cyanuric acid and 217g of ethylene glycol, add 5g of ammonium chloride, stir and heat up to 220°C, keep the temperature for 4 hours, and when the viscosity of the material is 1000mPa.s, stop the reaction and remove water to obtain Cyanuric acid polyol amine prepolymer;

[0035] (2) Add 80g of toluene diisocyanate, 10g of triethylene amine, and 10g of aluminum oxide into the reactor, stir, heat up to 80-100°C, and add the cyanuric acid polyolamine prepolymer prepared in step (1) Add to the reactor in batches, the mass ratio of prepolymer addition to toluene diisocyanate is 0.5:1, keep warm for 1 hour after each addition, until the total addition of cyanuric acid polyol amine prepolymer and toluene diisocyanate The mass ratio of acid to fat is 3.5:1; after the reaction is completed, add 10g of triethylenediamine and continue the reaction for 0.5h. After coolin...

Embodiment 3

[0037] A preparation method of flame-retardant polyurethane material, comprising the steps of:

[0038] (1) Mix 129g cyanuric acid and 257g triethylenetetramine, add 10g ammonium chloride, stir and heat up to 220°C, keep the temperature for 4 hours, and when the viscosity of the material is 1000mPa.s, stop the reaction, remove water, Obtain cyanuric acid polyol amine prepolymer;

[0039](2) Add 80g of toluene diisocyanate, 5g of silicone oil, and 10g of aluminum oxide into the reactor, stir, and heat up to 80-100°C, then divide the cyanuric acid polyolamine prepolymer prepared in step (1) into batches Add the reactor once, the mass ratio of the prepolymer addition to toluene diisocyanate is 0.9:1, and keep warm for 2 hours after adding each time until the total addition of the cyanuric acid polyol amine prepolymer is equal to the mass ratio of toluene diisocyanate The mass ratio is 3.6:1; after the reaction is completed, 10g of triethylenediamine is added, and the reaction is...

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PUM

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Abstract

The invention mainly relates to a preparation method of a flame-retardant polyurethane material. The preparation method comprises the following steps: mixing cyanuric acid, used as a main raw material, with an alcohol amine, a polyol or a polyamine, and then carrying out a reaction to obtain a cyanuric acid polyol amine prepolymer; and mixing an isocyanate with the prepared cyanuric acid polyol amine prepolymer, carrying out a reaction, adding a curing agent after the reaction is completed, continuously performing a reaction for 0.5-1 h, lowering the temperature to 80 DEG C or less, fixing theobtained cooled reaction product by using a mold, and performing curing to prepare the flame-retardant polyurethane material. The flame-retardant polyurethane material prepared in the invention has the triazine ring structure, so the material has good flame-retarding and heat-insulating properties, and does not need any flame retardant; and the tensile strength of the polyurethane material is improved, so the flame-retardant polyurethane material has broad application prospects.

Description

technical field [0001] The invention relates to a flame-retardant polyurethane material and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Polyurethane (referred to as PU) is a polymer made of polyisocyanate and polyether polyol or polyester polyol or / and small molecule polyol, polyamine or water. It is porous, low in density and chemically resistant. And other excellent properties, are widely used in many fields of life and production. However, while polyurethane materials bring convenience to people, they also pose a threat to people's safety because of their low ignition point and are easy to burn in the air. Flame-retardant polyurethane materials have emerged as the times require. By changing the type and composition of raw materials, the form and performance of the product can be greatly changed, and final products with different performance can be obtained to meet different use requirements. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/32
CPCC08G18/3851
Inventor 朱维群唐震朱超王倩
Owner SHANDONG UNIV
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