Catalyst for preparation of polyester and process for...

Details Catalyst for preparation of polyester and process for... Catalyst for preparation of polyester and process for...

2002-07-16

2009-06-09

Zemel, Irina S (Department: 1796)

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

Synthetic resins

From carboxylic acid or derivative thereof

C528S286000, C528S302000, C528S208000, C502S102000, C502S103000, C502S111000, C502S121000, C502S127000

Reexamination Certificate

active

07544762

ABSTRACT:
A polyester having a good color tone (a high L value and a low b value) and a low acetaldehyde content is obtained by using a catalyst containing a reaction product of (A) a titanium compound (1) represented by the general formula (I) and/or a titanium compound (2) obtained by reacting the titanium compound (1) of the general formula (I) with an aromatic polyhydric carboxylic acid represented by the general formula (II) or an anhydride thereof, with (B) a phosphorus compound (3) represented by the general formula (III).[wherein R1, R2, R3, R4and R5=a C2-C10alkyl group, k=1 to 3, m=2 to 4, and R6=a substituted or non-substituted C6-C20aryl group or a C6-C20alkyl group].

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