Polymerization catalyst for polyester, method for producing...

Details Polymerization catalyst for polyester, method for producing... Polymerization catalyst for polyester, method for producing...

2007-12-20

2010-11-16

Boykin, Terressa M (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

C210S500210, C210S640000, C528S378000, C528S400000

Reexamination Certificate

active

07834128

ABSTRACT:
A process for producing a polyester using a catalyst, which catalyst enables producing a polyester excellent in color tone and transparency at a high reaction velocity; the catalyst; and a method for producing the catalyst, which catalyst comprises:(1) at least one metal element selected from the group consisting of metal elements of Group 4A of the Periodic Table,(2) at least one metal element selected from the group consisting of metal elements of Group 2A of the Periodic Table, aluminum, manganese, iron, cobalt, zinc, gallium and germanium,(a) when the total amount of metal atoms derived from metal element (1) is represented by t (mol/catalyst kg), and the total amount of metal atoms derived from metal element (2) is represented by m (mol/catalyst kg), the value of m/t is within 0.50≦m/t≦3.50.

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