Flame retardant, polyester, flame-retarding epoxy resin cured material and preparation method thereof

A flame-retardant epoxy resin, epoxy resin curing technology, applied in the direction of chemical instruments and methods, manufacture of fire-resistant and flame-retardant filaments, compounds of Group 5/15 elements of the periodic table, etc. Elongation strength and mechanical properties are greatly affected, and the effects of mechanical strength improvement, easy realization of conditions and simple operation are achieved.

Inactive Publication Date: 2017-10-17
YANCHENG INST OF IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to obtain a better flame retardant effect, the addition of phosphate flame retardants and phosphorus oxide flame retardants is relatively large, and the addition amount needs to reach about 15-40%, and it has a great impact on the mechanical properties of the product. lower tensile strength

Method used

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  • Flame retardant, polyester, flame-retarding epoxy resin cured material and preparation method thereof
  • Flame retardant, polyester, flame-retarding epoxy resin cured material and preparation method thereof
  • Flame retardant, polyester, flame-retarding epoxy resin cured material and preparation method thereof

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preparation example Construction

[0023] The embodiment of the present invention also provides a method for preparing a cured flame-retardant epoxy resin, comprising the following steps:

[0024] S1, synthesis of intermediates;

[0025] The addition accelerator and 2-hydroxybenzaldehyde undergo a catalytic reaction under the action of a catalyst, and what actually occurs between the addition accelerator and 2-hydroxybenzaldehyde is a condensation reaction. The reaction mechanism is: the carbonyl of 2-hydroxybenzaldehyde undergoes nucleophilic addition reaction with the amino group to form a secondary amine with a hydroxyl group, and under the action of a catalyst, a part of water is removed to form an imine.

[0026] A further specific operation process is that the addition accelerator and the solvent are mixed under the atmosphere of protective gas, and then mixed with 2-hydroxybenzaldehyde and a catalyst to undergo a catalytic reaction. The use of protective gas is to prevent the oxygen in the air from affe...

Embodiment 1

[0052] A flame retardant provided in this embodiment has a structural formula as shown below.

[0053]

[0054] The embodiment of the present invention also provides a method for preparing a flame retardant:

[0055] S1. Synthesis of intermediates: After mixing 1mol 4,4'-diaminophenylsulfone and 100ml tetrahydrofuran, under the protection of nitrogen, heat to the reflux temperature of tetrahydrofuran, then add 2mol 2-hydroxybenzaldehyde and 0.2g acetic acid, and react 6 Hour. After the reaction was completed, it was cooled, filtered, washed three times with tetrahydrofuran, and then dried to obtain 0.96 mol of an orange-red intermediate, ie, the yield of the intermediate was 96.5%.

[0056] S2, the synthesis of flame retardant: after mixing 1.3mol intermediate with 1mol 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, add tetrahydrofuran as reaction solvent, and in tetrahydrofuran Reaction at reflux temperature for 12 hours. After the reaction, the reaction solution w...

Embodiment 2

[0063] Embodiments of the present invention provide a method for preparing a flame retardant:

[0064] S1. Synthesis of intermediates: After mixing 1mol 4,4'-diaminophenylsulfone and 200ml chloroform, under the protection of nitrogen, heat to the reflux temperature of chloroform, and then add 2.5mol 2-hydroxybenzaldehyde and 0.1g p-toluenesulfonic acid, and reacted for 8 hours. After the reaction was completed, it was cooled, filtered, washed with chloroform for 3 times, and then dried to obtain 0.97 mol of an orange-red intermediate, that is, the yield of the intermediate was 97.1%.

[0065] S2, synthesis of flame retardant: after mixing 1.4mol intermediate with 1mol 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, add chloroform as reaction solvent, and The reaction was carried out at the reflux temperature of chloroform for 10 hours. After the reaction, the reaction solution was naturally cooled to room temperature, and the flame retardant was precipitated from the rea...

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Abstract

The invention relates to the field of flame-retarding products, in particular to a flame retardant, polyester, a flame-retarding epoxy resin cured material and a preparation method thereof. The flame retardant obtains high flame retardancy under the synergistic action of nitrogen and phosphorus, and the strength of epoxy resin is enhanced through amino and hydroxyl in a molecule. The flame-retarding epoxy resin cured material is high in flame retardancy and relatively high in mechanical property.

Description

technical field [0001] The invention relates to the field of flame retardant products, and in particular to a flame retardant, polyester, and a cured product of flame retardant epoxy resin and a preparation method thereof. Background technique [0002] Polyester, epoxy resin, etc. can be flame-retardant processed by using additive flame retardants or introducing flame-retardant monomers into the molecules. The additive flame retardant is directly mixed with the resin, which is easy to process and has a wide range of applications. It is the main body of the flame retardant; the reactive flame retardant is often bonded to the polymer chain as a monomer, which has little effect on the performance of the product and is flame retardant. The effect is long-lasting; commonly used flame retardants are divided into halogen flame retardants, nitrogen flame retardants, phosphorus flame retardants, silicon flame retardants, intumescent flame retardants, inorganic fillers, etc. At prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08G59/56C08G59/50C08G59/62D01F6/92D01F1/07C07F9/6574
CPCD01F1/07D01F6/92C07F9/65748C08G59/5033C08G59/504C08G59/5093C08G59/56C08G59/621C08L63/00C08L2201/02
Inventor 李亮张伟封怀兵
Owner YANCHENG INST OF IND TECH
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