Bis glycol ester of sodium sulfo isophthalic acid from its dimet

Details Bis glycol ester of sodium sulfo isophthalic acid from its dimet Bis glycol ester of sodium sulfo isophthalic acid from its dimet

1973-06-14

1976-02-03

Sebastian, Leland A.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

260 75S, 260470, C08G 7900

Patent

active

039363899

ABSTRACT:
Glycol solutions of a bis glycol ester of a difunctional aromatic compound possessing one or more metallo sulfonate groups suitable for use in continuous or non-continuous preparation of fiber-forming cationic dyeable copolyesters by copolymerization with a low molecular weight glycol-dicarboxylic acid prepolymer are prepared by reacting the dimethyl ester of a metallo sulfo dicarboxylic acid with glycol at a mole ratio of about 4-30 of the glycol to 1 of the dimethyl ester, under ester interchange conditions so as to provide a solution of the bis glycol ester of the metallo sulfo dicarboxylic acid in glycol containing about 20-75% of the bis glycol ester having a carboxyl plus carboxylate content of not more than about 200.mu.eq/g of bis glycol ester, and no more than about 10 weight percent of glycol ether based on bis glycol ester. A conventional ester interchange catalyst and glycol ether suppressant may be employed.

REFERENCES:
patent: 3033824 (1962-05-01), Huffman
patent: 3060152 (1962-10-01), Ringwald
patent: 3169944 (1965-02-01), Scott et al.
patent: 3634541 (1972-01-01), Kelkheim et al.
patent: 3636131 (1972-01-01), Davis et al.
patent: 3639352 (1972-01-01), Katsoura et al.
patent: 3663508 (1972-05-01), Mobius et al.
patent: 3725348 (1973-04-01), Harrison et al.
Encyclopedia of Chemical Technology, Vol. 16, 1968, 2nd Edition, John Wiley, pp. 165, 166, 174, 175, 176, 177.

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