Granted Patent
B2
US 6,942,706 · App. 10/806,854 · Granted Sep 13, 2005
Vat acid dyeing of textile fibers
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Abstract
A process for dyeing certain textile fibers, utilizing vat acid dyeing and specific additional (second) reducing agents such as α-hydroxyalkylsulfinic acids, their salts and 1,2,4-trithiolane, resulting in excellent depth of shade and washfastness, is provided.
Claims (2)
1. A solid mixture comprising at least one vat acid dye, at least one carboxylic acid comprising 12-22 carbon atoms, at least one reducing agent selected from the group consisting of sodium dithionite, α-hydroxyalkylsulfinic acids comprising 1-6 carbon atoms, water-soluble salts of such acids, 1,2,4-trithiolane, and mixtures thereof, and at least one surfactant.
2. The mixture of claim 1 wherein the carboxylic acid comprises 16-20 carbon atoms, and the surfactant is anionic.
Assignments (5)
RELEASE OF SECURITY INTEREST
Recorded Nov 10, 2011
From: DEUTSCHE BANK AG NEW YORK BRANCH
To: INVISTA NORTH AMERICA S.A.R.L.
Reel/Frame 027211/0298 →
SECURITY AGREEMENT
Recorded Mar 19, 2009
From: INVISTA NORTH AMERICA S.A.R.L.
To: DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT
Reel/Frame 022416/0849 →
RELEASE OF U.S. PATENT SECURITY INTEREST
Recorded Mar 19, 2009
From: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT AND COLLATERAL AGENT (F/K/A JPMORGAN CHASE BANK)
To: INVISTA NORTH AMERICA S.A.R.L. (F/K/A ARTEVA NORTH AMERICA S.A.R.L.)
Reel/Frame 022427/0001 →
SECURITY INTEREST
Recorded Jun 23, 2004
From: INVISTA NORTH AMERICA S.A.R.L. F/K/A ARTEVA NORTH AMERICA S.A.R.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 015592/0824 →
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded May 27, 2004
From: E. I. DU PONT DE NEMOURS AND COMPANY
To: INVISTA NORTH AMERICA S.A.R.L.
Reel/Frame 015286/0708 →