Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1999-10-19
2000-06-13
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528274, 528283, 528286, 528294, 524706, 524709, 524710, 524730, 524745, 524765, 524773, C08G 6378, C08J 302
Patent
active
060751150
ABSTRACT:
The invention provides a process that can be used for producing a bis-glycolate ester of 5-sulfo isophthalate metal salt. The process comprises contacting a 5-sulfo isophthalate a metal salt or a dialkyl ester of 5-sulfo isophthalate metal salt, in the presence of a catalyst, with a glycol. The catalyst comprises (1) a titanium compound, a solubility promoter, a phosphorus source, and optionally a solvent, (2) a titanium compound, a complexing agent, a phosphorus source, and optionally a solvent, a sulfonic acid, or combinations thereof, or (3) combinations of (1) and (2). The solubility promoter can be selected from the group consisting of ortho silicates, ortho zirconates and combinations thereof. The phosphorus source is selected from the group consisting of a phosphonic acid, a phosphinic acid, a phosphine, and combinations of two or more thereof. The complexing agent can be selected from the group consisting of hydroxycarboxylic acids, aminocarboxylic acids, and combinations thereof. The invention also provides a process that can be used for producing a cationic dyeable polyalkylene terephthalate. The process comprises contacting a mixture, in the presence of an esterification or transesterification catalyst, with a glycol in which the mixture comprises the bis-glycolate ester of 5-sulfo isophthalate metal salt produced by the process disclosed above and either a terephthalate acid or a dialkyl terephthalate.
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Peet William G
Putzig Donald Edward
Acquah Samuel A.
E. I. Du Pont de Nemours and Company
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