Bleaching and dyeing; fluid treatment and chemical modification – Chemical modification of textiles or fibers or products thereof – Cellulose fibers
Patent
1998-12-21
2000-09-12
Einsmann, Margaret
Bleaching and dyeing; fluid treatment and chemical modification
Chemical modification of textiles or fibers or products thereof
Cellulose fibers
8606, D06M 13328, D06M 13385
Patent
active
061171913
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a dye scavenging substrate, and to a method for its manufacture.
In U.S. Patent Specification No. U.S. Pat. No. 4,380,453 to Claiborne, there is disclosed a system for removing undesirable random free-flowing dye from baths containing other materials to which association of such random dyes is undesirable.
The Specification discloses a method for the production of a dye scavenging substrate or cloth and to a method for its use.
The problems which the present invention serves to solve are conveniently provided in the Claiborne Specification. These problems, as outlined in Claiborne primarily relate to fading in home and commercial laundries. This problem has plagued housewives and businessmen for a considerable period of time.
It is well known that a typical mix of materials being laundered will have somewhat different colours, even if sorted into the so-called "white" and "coloured" batches. Although fading of dyes is more prevalent from new, unlaundered, or heretofore infrequently laundered goods, even articles with considerable fastness to washing, or having a long history of numerous previous launderings, may continue to bleed small amounts of dyestuff or colorant into the bath or wash water. The well known, but aggravating and undesirable result of such fading is that at least part of the extraneous, free flowing colorant or dyestuff which has bled from its original material substrate may then be absorbed, adsorbed, reacted with, or otherwise physically deposited on or associated with other materials in the same bath or wash water, thus discolouring this latter item.
While prior attempts to solve this problem have primarily been directed toward making the dyes or colorants have greater affinity for their original material substrate, the present invention is directed to a different aspect of the problem, namely effectively eliminating dyestuffs or colorants which have bled from or faded from the original material upon which they entered the bath or wash water environment. More specifically, the present invention is directed to a dye scavenging member or cloth; and the methods by which such a dye scavenging cloth or substrate is manufactured.
While the substrate of Claiborne has, experimentally, been found to scavenge dyes, it has also been found that it is only capable of scavenging relatively minor colour runs. Furthermore, the production of the Claiborne substrate has been found to be very cumbersome and tedious as the substrate or cloth must be stored for over twelve hours. In addition, contrary to what is taught in the Specification, it has been found that the cloth is not particularly suitable for repeated use. In addition, the production costs are relatively high.
It is an object of the present invention to provide a more economical production method and to provide an improved substrate.
The invention, therefore, provides a method for the production of a dye scavenging substrate which comprises the steps of:-- an N-trisubstituted ammonium 2-hydroxy-3-halopropyl compound having the general formula: ##STR1## or a salt of epoxy propyl ammonium having the general formula: ##STR2## wherein X is a halogen radical, Y is a chloride, bromide, sulfate or sulfonate, and the R's are methyl, ethyl, butyl or benzyl groups or an hydroxyl substituted derivative thereof; (100-200 psi); 30.degree. C. and 40.degree. C.; material at a temperature of between 15.degree. C. and 100.degree. C. for a period of between 1 hour and 12 hours; through an acid bath; (150-250 psi); and
Preferably, the compound, which is a dye scavenging material, is glycidyltrimethylammonium chloride.
Preferably, the alkaline solution is at a temperature of between 30.degree. C. and 50.degree. C. most preferably approximately 45.degree. C.
Preferably, the cellulosic material is a textile material which may take any form such as a woven, non-woven, or knitted fabric, a braided rope or bail or any other desirable configuration. The cellulosic material may be paper or may be a naturally occurring material such as cotton or
REFERENCES:
patent: 3778225 (1973-12-01), Cuvelier et al.
patent: 4072464 (1978-02-01), Balland
patent: 4380453 (1983-04-01), Claiborne
patent: 5489313 (1996-02-01), Hall et al.
patent: 5667533 (1997-09-01), Hauser et al.
patent: 5881412 (1999-03-01), Ziskind
Einsmann Margaret
Little Island Patents
LandOfFree
Dye scavenging substrate, and a method for its manufacture does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dye scavenging substrate, and a method for its manufacture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dye scavenging substrate, and a method for its manufacture will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-92027