Title:
DYED ANTISTAIN NYLON WITH CATIONIC DYE MODIFIER
Document Type and Number:
WIPO Patent Application WO1992002570
Kind Code:
A3
Abstract:
Shaped articles, such as fibers, formed of a polyamide formed by salt-blending the polyamide precursor salt with a cationic dye modifier, such as the dimethyl ester of 5-sulfoisophthalic acid, followed by polymerization, are rendered resistant to staining by acid dyes at ambient conditions either by adding an acid dye to the polymer melt or by dyeing with an acid dye from an acid dyebath at pH 2 to 7 and 60 DEG to 100 DEG C. so that the shaped article contains from at least 0.0048 and preferably at least 0.0096 wt % of an acid dyestuff. In a preferred aspect of the invention, the shaped articles are oriented, crimped, heat-set fibers for use as the facing in carpets.
More Like This:
Inventors:
WINDLEY WILLIAM THOMAS (US)
Application Number:
PCT/US1991/005332
Publication Date:
September 03, 1992
Filing Date:
August 01, 1991
Export Citation:
Assignee:
DU PONT (US)
International Classes:
C08G69/48; D01F1/06; D01F6/80; D06P3/24; (IPC1-7): C08G69/48; C08G69/26; C08G69/36; D01F1/06; D01F6/80; D06P3/24
Domestic Patent References:
| WO1991017301A1 | 1991-11-14 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 13, no. 546 (C-661)6 December 1989 & JP,A,1 223 908 ( TEIJIN LTD ) 7 September 1989 cited in the application
Download PDF: