US3836327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic alcohol-aromatic aldehyde carrier dyeing of aromatic polyamides
Assignee: Sybron Transition Corp
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Filing: 1972-07-20
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Granted: 1974-09-17
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Expires: 1992-07-20
Abstract
Abstract Yarns and other shaped articles made of aromatic polyamides of the non-flammable type are dyed by a process which includes treating the material with a cationic dye composition using as a carrier a blend of an aromatic aldehyde and an aromatic alcohol in which the aromatic alcohol is present in a ratio of greater than 1 part of the aromatic alcohol per each part of the aromatic aldehyde. A typical dye carrier blend consists of 10 grams per liter of dye bath of p-tolylaldehyde and 30 grams per liter of dye bath of benzyl alcohol.
Inventors
- 👤 F Bartsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:08
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/651; D06P1/65106; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/242; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
22 words
The method of claim 1 wherein said dye carrier composition comprises at least 25 grams per liter of said dye bath solution.
Claim 2
Dependent Claim
29 words
The method of claim 1 further comprising adding about 0.5 to 3.0 grams per liter of dye bath solution of a non-ionic emulsifying agent to the dye carrier composition.
Claim 3
Dependent Claim
30 words
The method of claim 1 further comprising adding about 0.5 to 3.0 grams per liter of dye bath solution of an anionic-non-ionic emulsifying agent mixture to the dye carrier composition.
Claim 4
Dependent Claim
39 words
The method of claim 1 further comprising adding about 0 to 10 grams per liter of dye bath solution of an auxiliary selected from the group consisting of benzoic acid, p-phenylphenol and benzene sulfonamide to the dye carrier composition.
Claim 5
Dependent Claim
36 words
The method of claim 1 wherein said dye carrier composition comprises 30 grams per liter of dye bath solution of said aromatic alcohol and 10 grams per liTer of dye bath solution of said aromatic aldehyde.
Claim 6
Dependent Claim
23 words
The method of claim 1 wherein the pH of the dye bath solution is adjusted to a pH of about 2 to 5.
Claim 7
Dependent Claim
203 words
A process for dyeing an aromatic polyamide shaped article prepared from an aromatic diamine and an aromatic dicarboxylic acid with a cationic dye comprising: a. treating said aromatic polyamide shaped article with a dye carrier composition consisting essentially of an aromatic alcohol selected from the group consisting of benzyl alcohol, o-tolyl alcohol, m-tolyl alcohol and p-tolyl alcohol and 2-hydroxylethyl phenyl ether and an aromatic aldehyde selected from the group consisting of benzaldehyde, o-tolylaldehyde, m-tolylaldehyde and p-tolylaldehyde wherein the ratio of the aromatic alcohol to the aromatic aldehyde is greater than 1.0; b. treating said aromatic polamide shaped article which has been treated with said dye carrier composition, in a dye bath solution having a pH of about 2 to 7 consisting essentially of water and a cationic dye; c. heating said dye bath solution containing said aromatic polyamide shaped article gradually to about 210* to 270*F.; d. maintaining said dye bath solution at a temperature of about 210* to 270*F. for about 1-3 hours to produce a dyed aromatic polyamide shaped article; e. cooling said dye bath solution; f. rinsing said dyed aromatic polyamide shaped article with warm water; and g. drying said dyed aromatic polyamide shaped article at about 100* to 400*F.
Claim 8
Dependent Claim
39 words
The process of claim 8 further comprising adding about 5 to 40 percent (based on the weight of said dye carrier composition) of an auxiliary dye carrier selected from the group consisting of benzoic acid, p-phenylphenol and benzene sulfonamide.
References Cited (Backward Citations)
GB856381A
Cited
US3506990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |