18959-30-3, Name is 4,5-Difluorophthalic Anhydride, belongs to benzofurans compound, is a common compound. Quality Control of 4,5-Difluorophthalic AnhydrideIn an article, once mentioned the new application about 18959-30-3.
Disclosed herein is a polyimide resin including a silica filler surface-treated with a fluorine-containing compound, and a polyimide film formed using the polyimide resin. The polyimide resin has improved dispersibility and heat resistance because the surface of a silica filler is fluorinated.
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Reference：
Benzofuran – Wikipedia,
Benzofuran | C8H2912O – PubChem