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Benzimidazole-type humidity-sensitive high-molecular coating material and preparation method and application thereof

A technology of benzimidazole and polybenzimidazole imide is applied in the fields of humidity-sensitive polymer coatings and their preparation and application, which can solve problems such as poor sensitivity, accuracy and resolution, and achieve convenient source, simple operation, The effect of mild reaction conditions

Inactive Publication Date: 2013-02-06
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to poor sensitivity, accuracy and resolution, traditional measurement methods are difficult to connect with modern communication record control equipment

Method used

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  • Benzimidazole-type humidity-sensitive high-molecular coating material and preparation method and application thereof
  • Benzimidazole-type humidity-sensitive high-molecular coating material and preparation method and application thereof
  • Benzimidazole-type humidity-sensitive high-molecular coating material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Put 22.4 grams (0.1 moles) of 2-(4-aminophenyl)-5-aminobenzimidazole (APABI) and 1500 grams of N-methyl-2-pyrrolidone into the reaction kettle, stir and dissolve at room temperature, then add 33.6 g (0.1 mol) 3,5-bis(4-aminophenoxy)benzoic acid (35DAPOBA) and 42.8 g (0.1 mol) 1,4-bis(2-trifluoromethyl-4-aminophenoxy) ) benzene (14BAPB-2TF), after stirring and dissolving, add 93.0 g (0.3 moles) of 3,3',4,4'-tetracarboxydiphenyl ether dianhydride (ODPA), stir and react for 3 hours, then add 200 g of toluene , heated to reflux for water separation for 6 hours, then cooled to room temperature to obtain 1891.8 g of polybenzimidazolium imide solution, namely component A, with a solid content of 10.1%, denoted as A1.

Embodiment 2

[0048] Put 2.24 g (0.01 mol) of 2-(4-aminophenyl)-5-aminobenzimidazole (APABI) and 685.2 g of N-methyl-2-pyrrolidone into the reaction kettle, stir and dissolve at room temperature, then add 33.6 g (0.1 mole) 3,5-bis(4-aminophenoxy)benzoic acid (35DAPOBA), and 16.2 g (0.15 mole) p-phenylenediamine (PDA), 20.0 g (0.1 mole) 3,4' -Diaminodiphenyl ether (34DADPE) and 27.33 g (0.05 mol) of 2,2-bis[4-(2-trifluoromethyl-4-aminophenoxy)phenyl]propane (BAPOPP-2TF), stirred After dissolving, add 67.6 grams (0.31 moles) of pyromellitic anhydride (PMDA) and 29.4 grams (0.1 moles) of 3,3',4,4'-tetracarboxybiphenyl dianhydride (BPDA), and stir for 4 hours , add 100 grams of toluene, heat and reflux for 8 hours, then cool to room temperature to obtain 981.5 grams of polybenzimidazolium imide solution, that is, component A, with a solid content of 20%, which is designated as A2.

Embodiment 3

[0050] Put 22.4 g (0.1 mol) of 2-(4-aminophenyl)-5-aminobenzimidazole (APABI), 500 g of N,N-dimethylacetamide and 500 g of N-methyl-2-pyrrolidone After stirring and dissolving at room temperature, add 168.0 grams (0.5 moles) of 3,5-bis(4-aminophenoxy)benzoic acid (35DAPOBA) and 4.3 grams (0.01 moles) of 1,3-bis(2 -Trifluoromethyl-4-aminophenoxy)benzene (13BAPB-2TF), after stirring to dissolve, add 57.2 g (0.11 moles) of 2,2-bis[4-(3,4-dicarboxyphenoxy) Phenyl]propane dianhydride (BPADA), 54.5 g (0.25 mol) pyromellitic anhydride (PMDA), 77.5 g (0.25 mol) 3,3',4,4'-tetracarboxydiphenyl ether dianhydride (ODPA ), after stirring and reacting for 6 hours, add 160 grams of toluene, heat and reflux for 10 hours and then cool to room temperature to obtain 1543.9 grams of polybenzimidazolium imide solution, namely component A, with a solid content of 24.8%. Make A3.

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Abstract

The invention relates to a benzimidazole-type humidity-sensitive high-molecular coating material and a preparation method and application thereof. The humidity-sensitive high-molecular coating material comprises poly(benzimidazole-imide), N,N,N',N'O,O'-hexa-glycidyl group-2,2-bis(3-amino group-4-hydroxyphenyl)-hexafluoropropane, 2-ethyl-4-methylimidazole and an organic solvent. The preparation method comprises the following steps of: putting 2-(4-aminophenyl)-5-aminobenzimidazole and a strongly polar non-protonic organic solvent into a reaction vessel, and stirring and dissolving under room temperature; then adding 3,5-bis(4-aminophenoxy)benzoic acid and other aromatic diamines, stirring, dissolving and adding aromatic dianhydride, stirring, and reacting; adding methylbenzene, heating, refluxing, separating water, reacting, and cooling to room temperature to obtain A component; adding B component, and uniformly stirring and mixing to obtain the benzimidazole-type humidity-sensitive high-molecular coating material. The invention has the advantages of excellent comprehensive performance, simple manufacturing method, capability of completing preparation process in general-purpose equipment, and suitability for industrialized production.

Description

technical field [0001] The invention belongs to the field of moisture-sensitive polymer paint and its preparation and application, and in particular relates to a benzimidazole-type moisture-sensitive polymer paint and its preparation method and application. Background technique [0002] In the fields of meteorology, environmental protection, national defense, aviation, aerospace, navigation, industry, agriculture, medical care, electronic microelectronics, etc., it is often necessary to measure and control the ambient humidity. The measurement of humidity is much more complicated than the measurement of temperature, mainly because temperature is an independent measurand, while the measurement of humidity cannot be measured due to the partial pressure of water vapor in the air, so it has to be transformed into The humidity value can only be obtained by measuring the secondary parameters related to humidity and then converting them. [0003] There are three main types of trad...

Claims

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Application Information

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IPC IPC(8): C09D179/08C09D7/12C08G73/18
Inventor 虞鑫海陈思远
Owner DONGHUA UNIV
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