Polyester process comprising the addition of a tetraalkyl zircon

Details Polyester process comprising the addition of a tetraalkyl zircon Polyester process comprising the addition of a tetraalkyl zircon

1990-08-21

1992-06-09

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528176, C08G 6302, C08G 6300

Patent

active

051208229

ABSTRACT:
In a process for preparing polyesters by mixing at least one non-vicinal aliphatic diol, e.g., 1,4-butanediol or its ester-forming equivalents with at least one dicarboxylic acid, e.g., terephthalic acid or its ester-forming equivalents in the presence of a tetraalkyl titanate catalyst, and adding to the mixture a tetraalkyl zirconate catalyst in amounts such that the ratio of titanium atoms to zirconium atoms is 1.3:1 to 9:1, preferably 1.9:1 to 4.6:1.

REFERENCES:
patent: 3326965 (1967-06-01), Schultheis et al.
patent: 3915936 (1975-10-01), Vollkommer et al.
patent: 4424140 (1984-01-01), Weinberg et al.
patent: 4468489 (1984-08-01), Weinberg et al.

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