CATALYST FOR POLYESTER PRODUCTION AND PROCESS FOR PRODUCING POLYESTER WITH THE SAME

摘要

New catalyst for producing a polyester comprises the reaction product of at least one titanium compound (A) with a phosphorus compound (B). New catalyst for producing a polyester comprises the reaction product of at least one titanium (Ti) compound (A) with a phosphorus (P) compound (B). (A) can be at least one Ti compound (1) represented by general formula (I) or a Ti compound (2) obtained by reacting Ti compound (1) with an aromatic polycarboxylic acid of general formula (II), or its anhydride. (B) is of formula (III) [Image] R 1>, R 2>, R 3>, R 4>2-10C alkyl; k : 1, 2 or 3; m : 2, 3 or 4; R 5>6-20C aryl or 1-20C alkyl group.