Preparation method of heat-resistant flame-retardant polyurethane

A water-based polyurethane heat-resistant technology, applied in the field of polyurethane, can solve the problems of poor heat resistance, limit the application of polyurethane materials, and fire safety hazards, and achieve excellent mechanical properties, excellent heat resistance and flame retardancy, and improve Effect of Tensile Strength and Water Resistance

Inactive Publication Date: 2016-08-17
CHUZHOU GLOBAL POLYURETHANE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary polyurethane materials are extremely flammable, and the heat resistance is not very good, which has great fire safety hazards in the application process, which greatly limits the practical application of polyurethane materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of preparation method of heat-resistant and flame-retardant water-based polyurethane proposed by the present invention comprises the following steps:

[0019] S1. Add 25 parts by weight of γ-aminoethylaminopropyltrimethoxysilane, 1 part of N,N-dimethylcyclohexylamine and 40 parts of tetrahydrofuran into the reaction vessel under ice-water bath conditions, and stir to dissolve Then add 2 parts of phenyl dichlorophosphate, react for 4 hours, then heat up to 45°C, stir and react for 6 hours, then filter, and the filtrate is rotary evaporated and then purified by a neutral alumina column to obtain a P-N-Si flame retardant;

[0020] S2, 20 parts of dibromoneopentyl glycol, 8 parts of isophthalic acid-5-sodium sulfonate, 0.01 part of stannous octoate are added in the reaction vessel by weight, in N 2 Under protection, raise the temperature to 200°C, keep it warm for 15 minutes, then add 20 parts of terephthalic acid, 38 parts of glutaric acid and 1 part of trimethylolp...

Embodiment 2

[0023] A kind of preparation method of heat-resistant and flame-retardant water-based polyurethane proposed by the present invention comprises the following steps:

[0024] S1. Add 15 parts by weight of γ-aminoethylaminopropyltrimethoxysilane, 2 parts of N,N-dimethylcyclohexylamine and 20 parts of tetrahydrofuran into the reaction vessel under the condition of ice-water bath, stir and dissolve Then add 5 parts of phenyl dichlorophosphate, react for 2.5 hours, then heat up to 55°C, stir and react for 2 hours, then filter, and the filtrate is rotary evaporated and then purified by a neutral alumina column to obtain a P-N-Si flame retardant;

[0025] S2, 50 parts of dibromoneopentyl glycol, 2 parts of isophthalic acid-5-sodium sulfonate, 0.05 part of stannous octoate are added in the reaction vessel by weight, in N 2 Under protection, raise the temperature to 180°C, keep it warm for 25 minutes, then add 35 parts of terephthalic acid, 20 parts of glutaric acid and 5 parts of trime...

Embodiment 3

[0028]A kind of preparation method of heat-resistant and flame-retardant water-based polyurethane proposed by the present invention comprises the following steps:

[0029] S1. Add 19 parts by weight of γ-aminoethylaminopropyltrimethoxysilane, 1.7 parts of N,N-dimethylcyclohexylamine and 28 parts of tetrahydrofuran into the reaction vessel under ice-water bath conditions, and stir to dissolve Finally, add 3.8 parts of phenyl dichlorophosphate, react for 3 hours, then heat up to 52°C, stir and react for 4 hours, then filter, and the filtrate is rotary evaporated and then purified by a neutral alumina column to obtain a P-N-Si flame retardant;

[0030] S2, 38 parts of dibromoneopentyl glycol, 4 parts of isophthalic acid-5-sodium sulfonate, 0.04 part of stannous octoate are added in reaction vessel by weight, in N 2 Under protection, raise the temperature to 185°C, keep it warm for 21 minutes, then add 31 parts of terephthalic acid, 25 parts of glutaric acid and 3 parts of trimeth...

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PUM

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Abstract

The invention discloses a preparation method of heat-resistant flame-retardant waterborne polyurethane. The method comprises the following steps of stirring gamma-(Trimethoxysilyl)-3-aza-hexylamine, N, N-dimethylcyolohexlemine and tetrahydrofuran, and then adding phenyl dichlorophosphate; after the reaction, obtaining a P-N-Si flame retardant; performing a heat insulation reaction on dibromoneopentyl glycol, m-phthalic acid-5-stannous octoate, and then adding the terephthalic acid, glutaric acid and trimethylolpropane; performing heating and stannous octoate, and adding dimethyl benzene until the materials are fused; performing backflow reaction to obtain polyester polyol; adding the polyester polyol and toluene di-isocyanate into a reaction device; adding 1, 4-butylene glycol after the reaction; after the reaction, adding the P-N-Si flame retardant, expansible graphite, multiwalled carbon nanotube and triethylamine; after the reaction, adding acetone; obtaining a finished product after the treatment. The preparation method of heat-resistant flame-retardant polyurethane provided by the invention has the advantages that the steps are simple; the conditions are mild; the obtained composite material has high intensity, excellent flame-retardant performance and good heat resistance.

Description

technical field [0001] The invention relates to the technical field of polyurethane, in particular to a preparation method of heat-resistant and flame-retardant waterborne polyurethane. Background technique [0002] Polyurethane is a general term for macromolecular compounds containing repeated carbamate groups on the main chain. It has excellent properties such as wear resistance, oil resistance, tear resistance, and chemical corrosion resistance. It has a wide range of uses and can replace rubber, plastic, and nylon. etc., used in airports, hotels, building materials, automobile factories, coal mines, cement factories, high-end apartments, villas, landscaping, colored stone art, parks and other fields. However, ordinary polyurethane materials are extremely flammable and have poor heat resistance, which poses a great fire safety hazard during application, which greatly limits the practical application of polyurethane materials. Contents of the invention [0003] Based on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08K3/04C08K5/544C08K7/24C08G18/66C08G18/46C08G18/32C08G63/688C08G63/682
CPCC08K3/04C08G18/4607C08G18/4676C08G18/664C08G63/6826C08G63/6886C08K5/544C08K7/24C08K2201/011C08L2201/02C08L2201/08C08L75/06
Inventor 龚文祥
Owner CHUZHOU GLOBAL POLYURETHANE TECH CO LTD
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