Water-soluble, ultra-filtrable polyurethane anionomers and the u

Details Water-soluble, ultra-filtrable polyurethane anionomers and the u Water-soluble, ultra-filtrable polyurethane anionomers and the u

1979-10-30

1981-06-30

Cockeram, H. S.

Bleaching and dyeing; fluid treatment and chemical modification

Chemical modification of textiles or fibers or products thereof

260 292TN, 260 23, 528 71, 528230, 528904, 528905, D06L 112, C08G 1850, C08G 1882, C08J 306

Patent

active

042760445

ABSTRACT:
There is described a polyurethane anionomer which is particularly suitable as a textile sizing agent because it is water-soluble and sufficiently hydrolysis-resistant to be recoverable by ultra-filtration. It is superior to previously known ionomers in being hard, tough and having a smooth surface.
This anionomer is produced by reacting organic diisocyanates with tri- or tetra-ethylene glycol and optionally other aliphatic glycols as well as glycols bearing carboxyl, carboxylate, sulphonic acid or sulphonate groups in selected ratios which render the anionomer water-soluble after neutralization of an appropriate amount of the carboxyl or sulphonic acid groups. Aqueous solutions can be formed by dissolving the solid anionomer in water and these solutions can be used to size textile fibers with the recovery of excess anionomer by ulra-filtration.

REFERENCES:
patent: 3061470 (1962-10-01), Kuemmerer
patent: 3412054 (1968-11-01), Milligan et al.
patent: 3879450 (1975-04-01), Velker et al.
patent: 4048001 (1977-09-01), Remley
patent: 4068035 (1978-01-01), Violland et al.
patent: 4096127 (1978-06-01), Schurmann et al.
patent: 4108814 (1978-08-01), Reiff et al.
patent: 4110284 (1978-08-01), Violland et al.
patent: 4163094 (1979-07-01), Turpin
Hackh's Chemical Dictionary, 3rd Ed., McGraw-Hill, N.Y., 1944, p. 878.

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