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US 7,405,265 B2Granted
Method of preparing catalyst for polymerization of aliphatic polycarbonate and method of polymerizing aliphatic polycarbonate
AssigneesPosco, Postech Foundation
InventorsSeung-Jae Moon, Moon-Hor Ree, Jong-Sung Kim, Kie-Soo Kim
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Abstract
Disclosed is a method of preparing a catalyst for polymerization of aliphatic polycarbonates and a method of polymerizing an aliphatic polycarbonate. This method includes reacting a zinc precursor and organic dicarboxylic acid in a non-ionic surfactant-included solution.
Claims10
A method of preparing a zinc containing catalyst for polymerization of aliphatic polycarbonates, said method comprising:
- (i) mixing 1 to 20 parts by weight of a templating agent with 100 parts by weight of a solvent to form a solution;
- (ii) mixing 1 to 20 parts by weight of a zinc precursor with the solution;
- (iii) precipitating material comprising a zinc containing, dicarboxylic acid ester catalyst after mixing 1 to 10 parts by weight of an organic dicarboxylic acid with the solution and;
- (iv) separating the catalyst from the templating agent in the precipitated material.
1 more element
A method of polymerizing an aliphatic polycarbonate, said method comprising:
- (i) mixing 1 to 20 parts by weight of a templating agent with 100 parts by weight of a solvent to form a solution;
- (ii) mixing 1 to 20 parts by weight of a zinc precursor with the solution;
- (iii) precipitating material comprising a zinc containing, dicarboxylic acid ester catalyst after mixing 1 to 10 parts by weight of an organic dicarboxylic acid with the solution;
- (iv) separating the catalyst from the templating agent in the precipitated material;
- and
- (v) combining said catalyst with an alkylene oxide and carbon dioxide under copolymerization conditions to produce an aliphatic polycarbonate.
3 more elements
Dependencies are inferred from the claim text.