Coordination complexes and process of producing polycarbonate by copolymerization of carbon dioxide and epoxide using the same as catalyst
View Patent ↗Provided are a complex prepared from ammonium salt-containing ligands and having such an equilibrium structural formula that the metal center takes a negative charge of 2 or higher, and a method for preparing polycarbonate via copolymerization of an epoxide compound and carbon dioxide using the complex as a catalyst. When the complex is used as a catalyst for copolymerizing an epoxide compound and carbon dioxide, it shows high activity and high selectivity and provides high-molecular weight polycarbonate, and thus easily applicable to commercial processes. In addition, after forming polycarbonate via carbon dioxide/epoxide copolymerization using the complex as a catalyst, the catalyst may be separately recovered from the copolymer.
1. A phenol derivative represented by Chemical Formula 14:
wherein
B 9 and B 10 independently represent (C2-C20)alkylene or (C3-C20) cycloalkylene; R 26 represents primary or secondary (C1-C20)alkyl; R 27 is selected from (C1-C20)alkyl and (C6-C30)aryl; and X 3 and X 4 are independently selected from Cl, Br and I, wherein the alkylene, cycloalkylene, alkyl, and aryl groups consist only of hydrogen and carbon atoms.
2. A method for preparing a phenol derivative according to claim 1 represented by Chemical Formula 14, comprising:
reacting a phenol compound represented by Chemical Formula 15 with tertiary alcohol compound represented by Chemical Formula 16 in the presence of an acid catalyst:
wherein
B 9 and B 10 independently represent (C2-C20)alkylene or (C3-C20)cycloalkylene; R 26 represents primary or secondary (C1-C20)alkyl; R 27 is selected from (C1-C20)alkyl and (C6-C30)aryl; and X 3 and X 4 are independently selected from Cl Br and I,
wherein the alkylene, cycloalkylene, alkyl, and aryl groups consist only of hydrogen and carbon atoms.
3. The method according to claim 2 , wherein B 9 and B 10 independently represent (C2-C6)alkylene; R 26 represents primary or secondary (C1-C7)alkyl; and R 27 represents (C1-C7)alkyl.
4. The method according to claim 3 , wherein B 9 and B 10 independently represent propylene; and R 26 and R 27 independently represent methyl.
5. The method according to claim 2 , wherein the acid catalyst is selected from AlCl 3 , inorganic acid and solid acid catalysts.
6. The method according to claim 3 , wherein the acid catalyst is selected from AlCl 3 , inorganic acid and solid acid catalysts.
7. The method according to claim 4 , wherein the acid catalyst is selected from AlCl 3 , inorganic acid and solid acid catalysts.