Boron-containing polyester, and synthesizing method and applications thereof

A synthesis method and polyester technology, applied in chemical instruments and methods, compounds containing elements of Group 3/13 of the periodic table, organic chemistry, etc., can solve problems such as high toxicity

Inactive Publication Date: 2013-05-01
张曦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Usually, the heat resistance of epoxy resin cured by amines and acid anhydrides is generally 80-180 °C, which is a flammable material. When it burns, it smokes a lot and is highly toxic. Therefore, it cannot meet the requirements of social development and the needs of high-tech development.

Method used

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  • Boron-containing polyester, and synthesizing method and applications thereof
  • Boron-containing polyester, and synthesizing method and applications thereof
  • Boron-containing polyester, and synthesizing method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The structural formula of boron-containing polyester of the present invention is as follows:

[0024]

[0025] where n is greater than or equal to 1.

[0026] The boron-containing polyester of the present invention has a brown-red appearance, is a viscous liquid or immobile body (depending on the amount of dehydration) at room temperature, basically does not burn on fire, and is basically smokeless.

[0027] figure 1 Be the infrared spectrogram of boron-containing polyester of the present invention, from figure 1 It can be seen from the figure that the peak with a wavenumber between 1370 and 1380 is the characteristic absorption peak of the B-O bond, and the peak with a wavenumber at 3220 is the characteristic absorption peak of the C-H bond in the resorcinol benzene nucleus. Therefore, it is proved that resorcinol and boric acid occur chemical reaction.

[0028] The density of boron-containing polyester of the present invention is 1.25~1.35g / cm 3 ; The oxygen in...

Embodiment 2

[0032] Weigh the raw materials according to 1.4 moles of resorcinol and 1 mole of boric acid, add the raw materials into a 500ml three-necked flask, and then put the three-necked flask into an electric control heating device for heating; when the temperature of the raw materials in the three-necked flask reaches around 120°C Melt gradually, turn on the agitator to stir, and at the same time open the cooling water outflow valve of the condenser to let the cooling water flow out; when the temperature of the raw material in the three-necked bottle reaches 130°C, condensed water will drip out, and then slowly adjust the temperature of the electric control heating device Voltage, so that the temperature in the three-necked bottle is gradually raised at a rate of 0.3g per minute according to the condensed water, and continuous condensation dripping is maintained; when the condensed water reaches 95% of the theoretical dehydration amount, the reaction is terminated; the reactant in the...

Embodiment 3

[0035] Weigh the raw materials according to 1.5 moles of resorcinol and 1 mole of boric acid, add the raw materials into a 500ml three-necked flask, and then put the three-necked flask into an electric-controlled heating and heat-conducting oil pan for heating. When the temperature of the raw materials in the three-necked bottle reaches 110°C The raw material melts gradually, turn on the agitator to stir, and at the same time open the cooling water valve of the condenser to let the cooling water flow out; when the temperature of the raw material in the three-necked bottle reaches 125°C, condensed water will drip out, and then slowly adjust the electric control to heat the heat transfer oil The voltage of the pot makes the inside of the three-necked bottle gradually heat up at a rate of 0.4g per minute according to the condensed water, and maintains continuous condensation dripping; when the condensed water reaches 98% of the theoretical dehydration amount, the reaction is termin...

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Abstract

The invention relates to the field of polyester, and the synthesizing and applications thereof. The invention discloses a boron-containing polyester with a specific structure represented as the following, wherein n is no smaller than 1. The invention also discloses a synthesizing method of the boron-containing polyester. The method comprises the steps that: raw materials are weighed according to a molar ratio that resorcinol: boric acid=1.0-3.0:1; a feeding reaction is carried out, wherein the materials are added into a reactor, such that resorcinol and boric acid are subjected to a sufficient reaction in the reactor; and a product is obtained, wherein the reaction product after the feeding reaction is discharged, such that the boron-containing polyester is obtained. The invention also discloses applications of the boron-containing polyester: (1) the polyester can be adopted as a curing agent and especially a curing agent of epoxy resin; with the ester, cured resin has fame-retardant performance that the epoxy resin cured product reaches an off-fire extinguishing effect or a short-time extinguishing effect, and he epoxy resin cured product has the properties of no smoke or less smoke; the cured epoxy resin can be applied as an ablation material in an aerospace field, wherein a linear ablation rate is no higher than -0.003mm/s, and mass ablation rate is no higher than 0.086g/s; and (2) the polyester can be applied as a flame retardant, wherein the boron-containing polyester provided by the invention is substantially non-flammable on fire, such that the ester can be directly used as the flame retardant.

Description

technical field [0001] The invention relates to a boron-containing polyester, a synthesis method and the application of the polyester. Background technique [0002] The outermost layer of boron element has only 3 electrons, and it is difficult to form a saturated state of 8 electrons when forming a compound, so it has an electron-withdrawing effect; boron element also has the function of absorbing neutron rays, and the B-O energy is very high. [0003] Epoxy resin is a chemical substance commonly used in daily life, and it is generally used after curing. Cured epoxy resin has the following characteristics: (1) High mechanical properties: epoxy resin has strong cohesion and compact molecular structure, so its mechanical properties are higher than those of general-purpose thermosetting resins such as phenolic resin and unsaturated polyester. (2) Strong adhesion: The epoxy resin curing system contains highly active epoxy groups, hydroxyl groups, and polar groups such as ether ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G79/08C07F5/04C08G59/62C08G18/64C08G18/66C08G18/48C08G18/32C09K21/06
Inventor 张曦
Owner 张曦
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