Patent US3853583A successfully refreshed from Google Patents.
US3853583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent whitening compositions
Assignee: Bayer Corp
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Filing: 1973-03-19
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Granted: 1974-12-10
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Expires: 1993-03-19
Abstract
Abstract Aqueous compositions of tetra-alkali metal salts of 4,4''-bus(4p-sulfoanilino-6-diisopropanolamino-s-triazin-2-ylamino) -2,2''stilbenedisulfonic acid which are stable and have excellent pot life when used for whitening cellulose fibers concomitantly with their treatment with conventional thermosetting textile resins.
Inventors
- 👤 A Neave
- 👤 T Langstroth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:55
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/60; D06L4/664; D06L4/657
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
141 words
A METHOD OF PRODUCING FLUORESCENTLY WHITENED, RESINTREATED COTTOM WHICH COMPRISES CONTACTING THE RESIN-FREE-FIBERS WITH AN EFFECTIVE AMOUNT OF A STABLE AQUEOUS, FLUORESCENT WHITENING COMPOSITION WHICH CONTAINS AS THE ESSENTIAL FLUORESCENT WHITENING INGREDIENT APPROXIMATELY 10 TO 30 PERCENT BY WEIGHT OF A DISSOLVED TETRA-ALKALI METAL SALT OF 4,4''-BIS((4-PSULFOANILINO-6-DIISOPROPANOLAMINO-S-TRAZIN-2-YLAMINO) -2,2''STIBENEDISULFONIC ACID, AND APPROXIMATELY 5 TO 15 PERCENT BY WEIGHT OF A CO-SOLVENT SELECTED FROM THE GROUP CONSISTING OF POLYHYDRIC ALCOHOLS, DIGLYCOL ETHERS, POLYETHYLENE GLYCOLS OF THE FORMULA H(OCH2XH2)NOH, WHEREIN N IS AN INTEGER FROM 4 TO 6, AND ALKANOLAMINES OF THE FORMULA (HO-ALK)P-NR3-P WHEREIN ALK IS A BIVALENT ALKANE RADICAL OF 2 TO 4 CARBON ATOMS, R IS HYDROGEN OR ALKYL OF 1 TO 2 CARBON ATOMS, AND P IS AN INTEGER FROM 1 TO 3 CONCOMITANTLY WITH THE APPLICATION OF THE TEXTILE TREATING RESIN; AND DRYING THE FLUORESCENTLY WITHENED AND RESIN-TREATED FIBERS.
Claim 2
Independent Claim
141 words
A METHOD OF PRODUCING FLUORESCENTLY WHITENED, RESINTREATED COTTOM WHICH COMPRISES CONTACTING THE RESIN-FREE-FIBERS WITH AN EFFECTIVE AMOUNT OF A STABLE AQUEOUS, FLUORESCENT WHITENING COMPOSITION WHICH CONTAINS AS THE ESSENTIAL FLUORESCENT WHITENING INGREDIENT APPROXIMATELY 10 TO 30 PERCENT BY WEIGHT OF A DISSOLVED TETRA-ALKALI METAL SALT OF 4,4''-BIS((4-PSULFOANILINO-6-DIISOPROPANOLAMINO-S-TRAZIN-2-YLAMINO) -2,2''STIBENEDISULFONIC ACID, AND APPROXIMATELY 5 TO 15 PERCENT BY WEIGHT OF A CO-SOLVENT SELECTED FROM THE GROUP CONSISTING OF POLYHYDRIC ALCOHOLS, DIGLYCOL ETHERS, POLYETHYLENE GLYCOLS OF THE FORMULA H(OCH2XH2)NOH, WHEREIN N IS AN INTEGER FROM 4 TO 6, AND ALKANOLAMINES OF THE FORMULA (HO-ALK)P-NR3-P WHEREIN ALK IS A BIVALENT ALKANE RADICAL OF 2 TO 4 CARBON ATOMS, R IS HYDROGEN OR ALKYL OF 1 TO 2 CARBON ATOMS, AND P IS AN INTEGER FROM 1 TO 3 CONCOMITANTLY WITH THE APPLICATION OF THE TEXTILE TREATING RESIN; AND DRYING THE FLUORESCENTLY WITHENED AND RESIN-TREATED FIBERS.
Claim 3
Dependent Claim
46 words
The method according to claim 1 wherein the aqueous composition contains approximately 10 to 30 percent by weight of the dissolved tetra-alkali metal salt of 4,4''-bis(4-p-sulfoanilino-6-diisopropanolamino-s-triazin-2-ylamino)-2,2'' -stilbenedisulfonic acid and approximately 5 to 15 percent by weight of a diglycol ether containing 4 or 6 carbon atoms.
Claim 4
Dependent Claim
24 words
The method according to claim 2 wherein the dissolved alkali metal salt is the disodium dipotassium salt and the diglycol ether is dipropylene glycol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |