HIGH-PDIV INSULATING WORKPIECE AND PREPARATION METHOD THEREFOR

WIPO Patent Application WO/2024/037158

A1

A high-PDIV insulating workpiece and a preparation method therefor. The preparation method comprises: mixing polyimide, a modifier, an alkaline organic compound, an organic improver and a water-soluble polar solvent to obtain an electrophoretic coating intermediate; mixing the electrophoretic coating intermediate with water to obtain an electrophoretic solution; then using a workpiece to be plated as an electrode, performing electrophoretic deposition in the electrophoretic solution to form an insulating paint film on a surface of said workpiece; and finally drying same to obtain an insulating workpiece, wherein the modifier is selected from at least one of a fluorine-containing organic compound, hollow microspheres and a porous substance, the particle size of the modifier not exceeding the thickness of the insulating paint film; and the organic improver is selected from one or more of an alcohol compound, an ether compound and a ketone compound, the hydrophilic-lipophilic balance value thereof being between 8-18. The insulating workpiece has relatively good levels of film thickness uniformity, adhesion, flexibility and voltage resistance, and in particular, has a relatively high PDIV.

TENG CHAO (CN)
HUANG WEIQI (CN)

PCT/CN2023/099818

February 22, 2024

June 13, 2023

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HEFEI HANZHIHE MATERIAL SCIENCE & TECH CO LTD (CN)

H01B13/06; C09D179/08

CN102732147A	2012-10-17
CN101125955A	2008-02-20
CN103680700A	2014-03-26
CN112194968A	2021-01-08
JP2010106340A	2010-05-13
JP2013234257A	2013-11-21

UNITALEN ATTORNEYS AT LAW CO., LTD. (CN)

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