Patent US2305509A successfully refreshed from Google Patents.
Patent US3429868A successfully refreshed from Google Patents.
Patent US4412066A successfully refreshed from Google Patents.
US4412066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer bound dyes prepared by diazo coupling reactions with poly(organophosphazenes)
Assignee: United States Department of Health and Human Services
•
Filing: 1982-06-16
•
Granted: 1983-10-25
•
Expires: 2002-06-16
Abstract
Abstract Polymer-bound dyes have been prepared by the diazotization of high polymeric [NP(OC6H5)x- (OC6H4NH2-p)y]n, followed by coupling to phenol, beta -naphthol, 6'-NaO3S- beta -naphthol, and p-aminophenylnaphthalene. These reactions were preceded by model compound studies with the cyclic trimer [NP(OC6H4NH2-p-)2]3. In both cases, the aminophenoxy units were generated by reduction of 4-nitrophenoxy groups with the use of PtO2 and hydrogen. The phosphazene skeleton was unaffected by the reduction, diazotization, and diazo coupling processes. The physical characteristics of the trimers and high polymers are described.
Inventors
- 👤 Harry R. Allcock
- 👤 Paul E. Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:42
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/10; C09B69/106; C08; C08G; C08G79/00; C08G79/02; C08G79/025; C09B41/00; G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
80 words
A polymer-bound dye prepared by diazotization of a high polymeric polyorganophosphazine [NP(OC 6 H 5 ) x (OC 6 H 4 NH 2 -p) y ] n , at about 0° C. in mineral acid solution by addition of alkali metal nitrite in acid solution followed by the addition of a coupling member in alkaline solution at a temperature not greater than about 2° C. to one member of the group consisting of phenol, β-naphthol, 6'-NaO 3 S-β-naphthol, and p-aminophenylnaphthalene.
Claim 2
Dependent Claim
80 words
A polymer-bound dye prepared by diazotization of a high polymeric polyorganophosphazine [NP(OC 6 H 5 ) x (OC 6 H 4 NH 2 -p) y ] n , at about 0° C. in mineral acid solution by addition of alkali metal nitrite in acid solution followed by the addition of a coupling member in alkaline solution at a temperature not greater than about 2° C. to one member of the group consisting of phenol, β-naphthol, 6'-NaO 3 S-β-naphthol, and p-aminophenylnaphthalene.
Claim 3
Dependent Claim
12 words
The polymer-bound dye according to claim 1 wherein the member is phenol.
Claim 4
Dependent Claim
12 words
The polymer-bound dye according to claim 1 wherein the member is β-naphthol.
Claim 5
Dependent Claim
14 words
The polymer-bound dye according to claim 1 wherein the member is 6'-NaO 3 S-β-naphthol.
Claim 6
Dependent Claim
12 words
The polymer-bound dye according to claim 1 wherein the member is p-aminophenylnaphthalene.
Claim 7
Dependent Claim
26 words
The polymer-bound dye according to claim 1 wherein the reaction proceeded from a cyclic trimer [NP(OC 6 H 4 NH 2 -p) 2 ] 3 .
Claim 8
Dependent Claim
21 words
A polymer-bound dye according to claim 1 wherein the coupling member is utilized in about equimolar quantities to the sodium nitrite.
References Cited (Backward Citations)
US4242499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |