652-39-1, Name is 4-Fluoroisobenzofuran-1,3-dione, belongs to benzofuran compound, is a common compound. category: benzofuranIn an article, once mentioned the new application about 652-39-1.
Polyurethane dispersant and the method for its preparation
The present invention is related to a polyurethane dispersant and a preparation method thereof. The polyurethane dispersant is terminated by a nitrogen-containing heterocyclic compound during synthesis. The nitrogen-containing heterocyclic compound is prepared by subjecting anhydride and a compound containing a primary amine and a secondary amine or a hydroxyl or mercapto group to dehydration condensation. The condensed product is the nitrogen-containing heterocyclic compound, containing a reactive hydrogen. The structural formula of the compound containing the primary amine and the secondary amine or hydroxyl or mercapto group is shown as follows: wherein n=1 to 5, and preferably 2 to 4, R1 and R2 are respectively alkyls containing 1 to 8 carbons, R1 and R2 are independent of each other or connected by a chemical bond to form one or more saturated or unsaturated 4-member to 8-member rings, and X represents N, O, or S.
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Reference£º
Benzofuran – Wikipedia,
Benzofuran | C8H2500O – PubChem