Carbodiimide-modified polyester fiber and preparation thereof

Details Carbodiimide-modified polyester fiber and preparation thereof Carbodiimide-modified polyester fiber and preparation thereof

1996-10-25

1999-03-23

Acquah, Samuel A.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

525437, 525440, 525452, 525511, 525540, 428364, 524195, D02G 300, C08K 529, C08F 2000

Patent

active

058857095

ABSTRACT:
There are described polyester fibers and filaments which, following reaction with carbodiimides, have capped carboxyl end groups, the carboxyl end groups being predominantly capped by reaction with mono- and/or biscarbodiimides which are present in the fibers and filaments in an amount of from 30 to 200 ppm, based on the weight of the polyester, the free carboxyl end group content being less than 3 meq/kg of polyester, and the fibers and filaments additionally containing at least 0.02 percent by weight of at least one free polycarbodiimide or of a reaction product containing still reactive carbodiimide groups, and also a process for the preparation thereof.
The filaments described are suitable in particular for producing papermaker's machine wire-cloths.

REFERENCES:
patent: 3193522 (1965-07-01), Neumann et al.
patent: 3193523 (1965-07-01), Neumann et al.
patent: 3193524 (1965-07-01), Holtschmidt
patent: 3972933 (1976-08-01), Lawton
patent: 3975329 (1976-08-01), Barnewell et al.
patent: 4022752 (1977-05-01), Horn et al.
patent: 4071503 (1978-01-01), Thomas et al.
patent: 4772649 (1988-09-01), Andrews et al.
English language abstract of CH-A-621 135 (Inventa AG ); 15, Jan. 1981.

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