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Patent US4624995A successfully refreshed from Google Patents.
US4624995A
Expired / Lapsed
US
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Triazolinethione-containing polymer
Assignee: 3M Co
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Filing: 1985-04-09
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Granted: 1986-11-25
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Expires: 2005-04-09
Abstract
Abstract A poly(triazolinethione) is prepared by a process comprising the steps: (a) providing a poly(acylthiosemicarbazide), (b) cyclodehydrating the poly(acylthiosemicarbazide) by subjecting it to an elevated temperature in the presence of an aqueous alkaline solution to form a polyanion of a poly(triazolinethione), (c) treating the polyanion of the poly(triazolinethione) with aqueous acid solution to provide the poly(triazolinethione), and (d) isolating the resulting poly(triazolinethione).
Inventors
- 👤 Alan R. Katritzky
- 👤 Stephen J. Cato
- 👤 Jerald K. Rasmussen
- 👤 Larry R. Krepski
- 👤 Steven M. Heilmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:45
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0605
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
92 words
A poly(triazolinethione) prepared by a process comprising the steps: (a) providing a poly(acylthiosemicarbazide), (b) cyclodehydrating said poly(acylthiosemicarbazide) by subjecting it to an elevated temperature of 60° to 150° C. in the presence of an aqueous alkaline solution to form a polyanion of a poly(triazolinethione), (c) treating said polyanion of said poly(triazolinethione) with aqueous acid solution to provide said poly(triazolinethione), and (d) isolating said resulting poly(triazolinethione); said poly(triazolinethione) being uncrosslinked, and at least 0.1 weight percent of said poly(triazolinethione) being capable of dissolving in dimethylformamide, dimethylacetamide, dimethyl sulfoxide, or N-methylpyrrolidone at 23° C.
Claim 2
Dependent Claim
92 words
A poly(triazolinethione) prepared by a process comprising the steps: (a) providing a poly(acylthiosemicarbazide), (b) cyclodehydrating said poly(acylthiosemicarbazide) by subjecting it to an elevated temperature of 60° to 150° C. in the presence of an aqueous alkaline solution to form a polyanion of a poly(triazolinethione), (c) treating said polyanion of said poly(triazolinethione) with aqueous acid solution to provide said poly(triazolinethione), and (d) isolating said resulting poly(triazolinethione); said poly(triazolinethione) being uncrosslinked, and at least 0.1 weight percent of said poly(triazolinethione) being capable of dissolving in dimethylformamide, dimethylacetamide, dimethyl sulfoxide, or N-methylpyrrolidone at 23° C.
Claim 3
Dependent Claim
135 words
A poly(triazolinethione) prepared by a process comprising the steps: (a) providing a poly(acylthiosemicarbazide) having units of the formula ##STR19## (b) cyclodehydrating said poly(acylthiosemicarbazide) by subjecting it to a temperature in the range of 60°-150° C. in the presence of an aqueous alkaline solution having a pH in the range of 8 to 13 to form a polyanion of a poly(triazolinethione) having the units of the formula ##STR20## wherein M is a monovalent ion, (c) treating said polyanion of said poly(triazolinethione) with an aqueous acid solution having a pH of 6 or less to provide units of said poly(triazolinethione) having the formula ##STR21## and (d) isolating and resulting poly(triazolinethione), said poly(triazolinethione) being uncrosslinked, and at least 0.1 weight percent of said poly(triazolinethione) being capable of dissolving in dimethylformamide, dimethylacetamide, dimethyl sulfoxide, or N-methylpyrrolidone at 23° C.
Claim 4
Dependent Claim
135 words
A poly(triazolinethione) prepared by a process comprising the steps: (a) providing a poly(acylthiosemicarbazide) having units of the formula ##STR19## (b) cyclodehydrating said poly(acylthiosemicarbazide) by subjecting it to a temperature in the range of 60°-150° C. in the presence of an aqueous alkaline solution having a pH in the range of 8 to 13 to form a polyanion of a poly(triazolinethione) having the units of the formula ##STR20## wherein M is a monovalent ion, (c) treating said polyanion of said poly(triazolinethione) with an aqueous acid solution having a pH of 6 or less to provide units of said poly(triazolinethione) having the formula ##STR21## and (d) isolating and resulting poly(triazolinethione), said poly(triazolinethione) being uncrosslinked, and at least 0.1 weight percent of said poly(triazolinethione) being capable of dissolving in dimethylformamide, dimethylacetamide, dimethyl sulfoxide, or N-methylpyrrolidone at 23° C.
Claim 5
Dependent Claim
19 words
The poly(triazolinethione) according to claim 2 wherein said poly(triazolinethione) comprises in the range of 2 to 10,000 triazolinethione units.
Claim 6
Dependent Claim
19 words
The poly(triazolinethione) according to claim 3 wherein said poly(triazolinethione) comprises in the range of 5 to 5,000 triazolinethione units.
Claim 7
Dependent Claim
23 words
The poly(triazolinethione) according to claim 1 wherein said poly(acylthiosemicarbazide) of Step (a) is prepared by reacting a bis(hydrazide) compound with a bis(isothiocyanate) compound.
Claim 8
Dependent Claim
139 words
A poly(triazolinethione) prepared by a process comprising the steps: (a) providing a poly(acylthiosemicarbazide) having units of the formula ##STR22## (b) cyclodehydrating said poly(acylthiosemicarbazide) by subjecting it to a temperature in the range of 60°-150° C. in the presence of an aqueous alkaline solution having a pH in the range of 8 to 13 to form a polyanion of a poly(triazolinethione) having the units of the formula ##STR23## wherein M is a monovalent ion, (c) treating said polyanion of said poly(triazolinethione) with an aqueous acid solution having a pH of 6 or less to provide units of said poly(triazolinethione) having the formula ##STR24## and its tautomeric form, and (d) isolating said resulting poly(triazolinethione), said poly(triazolinethione) being uncrosslinked, and at least 0.1 weight percent of said poly(triazolinethione) being capable of dissolving in dimethylformamide, dimethylacetamide, dimethyl sulfoxide, or N-methylpyrrolidone at 23° C.
Claim 9
Dependent Claim
139 words
A poly(triazolinethione) prepared by a process comprising the steps: (a) providing a poly(acylthiosemicarbazide) having units of the formula ##STR22## (b) cyclodehydrating said poly(acylthiosemicarbazide) by subjecting it to a temperature in the range of 60°-150° C. in the presence of an aqueous alkaline solution having a pH in the range of 8 to 13 to form a polyanion of a poly(triazolinethione) having the units of the formula ##STR23## wherein M is a monovalent ion, (c) treating said polyanion of said poly(triazolinethione) with an aqueous acid solution having a pH of 6 or less to provide units of said poly(triazolinethione) having the formula ##STR24## and its tautomeric form, and (d) isolating said resulting poly(triazolinethione), said poly(triazolinethione) being uncrosslinked, and at least 0.1 weight percent of said poly(triazolinethione) being capable of dissolving in dimethylformamide, dimethylacetamide, dimethyl sulfoxide, or N-methylpyrrolidone at 23° C.
Claim 10
Dependent Claim
35 words
A poly(triazolinethione) having units of the formula ##STR25## said poly(triazolinethione) being uncrosslinked, and at least 0.1 weight percent of said poly(triazolinethione) being capable of dissolving in dimethylformamide, dimethylacetamide, dimethyl sulfoxide, or N-methylpyrrolidone at 23° C.
Claim 11
Dependent Claim
35 words
A poly(triazolinethione) having units of the formula ##STR25## said poly(triazolinethione) being uncrosslinked, and at least 0.1 weight percent of said poly(triazolinethione) being capable of dissolving in dimethylformamide, dimethylacetamide, dimethyl sulfoxide, or N-methylpyrrolidone at 23° C.
Claim 12
Dependent Claim
60 words
A process for preparing a poly(triazolinethione) comprising the steps: (a) providing a poly(acylthiosemicarbazide), (b) cyclodehydrating said poly(acylthiosemicarbazide) by subjecting it to an elevated temperature in the presence of an aqueous alkaline solution to form a polyanion of a poly(triazolinethione), (c) treating said polyanion of said poly(triazolinethione) with aqueous acid solution to provide said poly(triazolinethione), and (d) isolating the resulting poly(triazolinethione).
Claim 13
Dependent Claim
60 words
A process for preparing a poly(triazolinethione) comprising the steps: (a) providing a poly(acylthiosemicarbazide), (b) cyclodehydrating said poly(acylthiosemicarbazide) by subjecting it to an elevated temperature in the presence of an aqueous alkaline solution to form a polyanion of a poly(triazolinethione), (c) treating said polyanion of said poly(triazolinethione) with aqueous acid solution to provide said poly(triazolinethione), and (d) isolating the resulting poly(triazolinethione).
Claim 14
Dependent Claim
106 words
A process for preparing a poly(triazolinethione) comprising the steps: (a) providing a poly(acylthiosemicarbazide) having units of the formula ##STR26## (b) cyclodehydrating said poly(acylthiosemicarbazide) by subjecting it to a temperature in the range of 60°-150° C. in the presence of an aqueous alkaline solution having a pH in the range of 8 to 13 to form a polyanion of a poly(triazolinethione) having units of the formula ##STR27## wherein M is a monovalent ion, (c) treating said polyanion of said poly(triazolinethione) with an aqueous acid solution having a pH of 6 or less to provide units of said poly(triazolinethione) having the formula ##STR28## (d) isolating said resulting poly(triazolinethione).
Claim 15
Dependent Claim
106 words
A process for preparing a poly(triazolinethione) comprising the steps: (a) providing a poly(acylthiosemicarbazide) having units of the formula ##STR26## (b) cyclodehydrating said poly(acylthiosemicarbazide) by subjecting it to a temperature in the range of 60°-150° C. in the presence of an aqueous alkaline solution having a pH in the range of 8 to 13 to form a polyanion of a poly(triazolinethione) having units of the formula ##STR27## wherein M is a monovalent ion, (c) treating said polyanion of said poly(triazolinethione) with an aqueous acid solution having a pH of 6 or less to provide units of said poly(triazolinethione) having the formula ##STR28## (d) isolating said resulting poly(triazolinethione).
Claim 16
Dependent Claim
20 words
The process according to claim 8 wherein said poly(acylthiosemicarbazide) is prepared by reacting a bis(hydrazide) compound with a bis(isothiocyanate) compound.
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) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |