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Heatproof coating layer and preparation method thereof

A technology of heat-resistant coating and aminophenylsulfone amide terminated, which is applied in coatings, fireproof coatings, electrical components, etc., can solve the problem that heat-resistant coatings cannot take into account thinner thickness and excellent heat resistance, and achieve Low heat shrinkage, excellent heat shrinkage resistance, and the effect of eliminating the force of aggregation

Active Publication Date: 2019-09-06
上海钱丰纺织品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the heat-resistant coating in the prior art cannot take into account the thinner thickness and excellent heat-resistant performance, and to provide a heat-resistant coating and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of a heat-resistant coating, the steps are as follows:

[0028] (1) After mixing isophthaloyl dichloride and p-phenylenediaminodiphenyl sulfone in a dimethyl sulfoxide solvent at a molar ratio of 5:5.1 to obtain a mixed solution, polycondensation reaction was carried out at a temperature of 1°C for 30 minutes. Terminated aminophenylsulfone amide surfactant, wherein, when the reaction started, the sum of isophthaloyl chloride and p-phenylenediaminodiphenylsulfone weight was 5% of the mixed solution weight, and the prepared aminophenylsulfone amide surfactant Molecular structure is NH 2 -C 6 h 4 -SO 2 -C 6 h 4 -NH-[CO-C 6 h4 -CO-NH-C 6 h 4 -SO 2 -C 6 h 4 ] n -NH 2 , n is 9, and the molar ratio of terminal amino group and sulfone group is 1:5;

[0029] (2) Dissolve the aminophenylsulfoneamide surfactant, aluminum oxide and polysulfoneamide in dimethylacetamide to form a coating solution, wherein the aminophenylsulfoneamide surfactant, alu...

Embodiment 2

[0035] A method for preparing a heat-resistant coating, the steps of which are as follows:

[0036] (1) After mixing isophthaloyl dichloride and p-phenylenediaminodiphenyl sulfone in a dimethyl sulfoxide solvent at a molar ratio of 5:5.2 to obtain a mixed solution, polycondensation reaction was carried out at a temperature of 2°C for 40 minutes. Terminated aminophenylsulfone amide surfactant, wherein, when the reaction started, the sum of isophthaloyl chloride and p-phenylenediaminodiphenylsulfone weight was 6% of the mixed solution weight, and the prepared aminophenylsulfone amide surfactant Molecular structure is NH 2 -C 6 h 4 -SO 2 -C 6 h 4 -NH-[CO-C 6 h 4 -CO-NH-C 6 h 4 -SO 2 -C 6 h 4 ] n -NH 2 , n is 11, and the molar ratio of the terminal amino group to the sulfone group is 1:6;

[0037] (2) dissolving the aminophenylsulfoneamide surfactant, zirconium dioxide and polyimide in dimethylformamide to form a coating solution, wherein the aminophenylsulfoneamide...

Embodiment 3

[0043] A method for preparing a heat-resistant coating, the steps of which are as follows:

[0044] (1) After mixing isophthaloyl dichloride and p-phenylenediaminodiphenyl sulfone in a dimethyl sulfoxide solvent at a molar ratio of 5:5.3 to obtain a mixed solution, polycondensation reaction was carried out at a temperature of 3°C for 50 minutes. Terminated aminophenylsulfone amide surfactant, wherein, when the reaction started, the sum of isophthaloyl chloride and p-phenylenediaminodiphenylsulfone weight was 10% of the mixed solution weight, and the prepared aminophenylsulfone amide surfactant Molecular structure is NH 2 -C 6 h 4 -SO 2 -C 6 h 4 -NH-[CO-C 6 h 4 -CO-NH-C 6 h 4 -SO 2 -C 6 h 4 ] n -NH 2 , n is 13, and the molar ratio of the terminal amino group to the sulfone group is 1:7;

[0045] (2) dissolving the aminophenylsulfoneamide surfactant, titanium dioxide and polysulfoneamide in dimethyl sulfoxide to form a coating solution, wherein the mass of the ami...

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Abstract

The invention relates to a heatproof coating layer and a preparation method thereof. The heatproof coating layer is mainly composed of an inorganic inert nanopowder, an amino-terminated benzenesulfonamide surfactant and a matrix material, wherein a molar ratio of amino groups at the end to sulfonyl groups of the amino-terminated benzenesulfonamide surfactant is 1:(5-8). The heatproof coating layerhas a thickness of 0.5-15 [mu]m and a porosity of 50-80%, and the heatproof temperature of a porous film containing the heatproof coating layer can reach 300 DEG C. The preparation method of the heatproof coating layer comprises the following steps: dissolving the inorganic inert nanopowder, the amino-terminated benzenesulfonamide surfactant and the matrix material in a polar solvent to form a coating layer solution, coating the surface of the porous film with the coating layer solution, and removing the polar solvent to form the heatproof coating layer on the surface of the porous film. Theporous film containing the heatproof coating layer of the present invention has an excellent heat shrinkage resistance and a small thickness, and can be used as a micro-porous separator for a lithiumion battery to improve the heating safety and the specific capacitance of the lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of coatings, and relates to a heat-resistant coating and a preparation method thereof, in particular to an ultra-thin heat-resistant coating with excellent heat shrinkage resistance and a preparation method thereof, in particular to a heat-resistant coating located in A heat-resistant coating containing inorganic inert nanometer powder on the surface of a porous film and a preparation method thereof. Background technique [0002] The materials commonly used for lithium-ion battery microporous separators are polyethylene microporous membranes or polypropylene microporous membranes prepared by wet or dry methods. These films have caused many unsafe problems due to their poor heat resistance during application. For this reason, many manufacturers use coatings to improve their heat resistance, and have achieved beneficial effects, such as a multi-layer lithium battery separator (201721306659.5), a safe lithium ...

Claims

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Application Information

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IPC IPC(8): C09D181/10C09D179/08C09D7/61C09D7/63H01M2/16H01M10/0525
CPCC08K2003/2227C08K2003/2244C08L2201/08C09D5/18C09D179/08C09D181/10C09D7/61C09D7/63H01M10/0525H01M50/446H01M50/449C08K3/22Y02E60/10
Inventor 钱辉春赵炯心陈利
Owner 上海钱丰纺织品有限公司
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