US3673158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfobetaine glycol modified poly(ethylene terephthalate)
Assignee: Celanese Corp
•
Filing: 1970-08-14
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Granted: 1972-06-27
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Expires: 1990-08-14
Abstract
Abstract Sulfobetaine glycols prepared by reaction of bis (hydroxyalkyl) amines with sultones are incorporated into polyesters and polyamides to improve dyeability.
Inventors
- 👤 Arthur M Reader
- 👤 Robert W Stackman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:27
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6884; C08G69/00; C08G69/02; Y; Y10; Y10S; Y10S8/00; Y10S8/04; Y10S8/21
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
36 words
said amine is selected from the group consisting of diethanolamine; dipropanolamine; dibutanolamine; dihexanolamine; dioctanolamine; N-ethyl, N,N-di (2-hydroxyethyl) amine; N-ethyl, N,N-di(3-hydroxypropyl) amine; N-propyl, N,N-di(3-hydroxypropyl) amine; N-hexyl, N,N-di(6-hydroxyhexyl)amine; and N-octyl, N,N-di(8-hydroxyoctyl)amine; b. said salt is of the formula
Claim 2
Dependent Claim
58 words
The composition of claim 1, wherein: a. said salt comprises from about 2 to about 8 weight per cent of said polyester, and b. said salt is prepared by reacting said dihydroxy amine with a sultone selected from the group consisting of 1,3-propane sultone and 1,3-butane sultone at a temperature of from about 25* to about 100* C.
Claim 3
Dependent Claim
26 words
The composition of claim 2, wherein said salt is prepared by reacting said dihydroxy amine with 1,3-propane sultone and said dihydroxy amine is of the formula
Claim 4
Dependent Claim
13 words
The composition of claim 3, wherein R'''''' is alkyl of two carbon atoms.
References Cited (Backward Citations)
US3238180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |