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Patent US4740568A successfully refreshed from Google Patents.
US4740568A
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Triazolinethione-containing polymer
Assignee: 3M Co
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Filing: 1986-09-03
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Granted: 1988-04-26
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Expires: 2006-09-03
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 03:42
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0605
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
45 words
A copolymer comprising at least one triazolinethione unit of the formula ##STR19## and copolymerizable comonomeric units, said copolymer being non-migratable and uncrosslinked, and at least 0.1 weight percent of said copolymer being capable of dissolving in dimethylformamide, dimethylacetamide, dimethyl sulfoxide, or N-methylpyrrolidone at 23° C.
Claim 2
Dependent Claim
45 words
A copolymer comprising at least one triazolinethione unit of the formula ##STR19## and copolymerizable comonomeric units, said copolymer being non-migratable and uncrosslinked, and at least 0.1 weight percent of said copolymer being capable of dissolving in dimethylformamide, dimethylacetamide, dimethyl sulfoxide, or N-methylpyrrolidone at 23° C.
Claim 3
Dependent Claim
28 words
The copolymer according to claim 1 wherein said copolymerizable comonomer is selected from the group consisting of a diamine, diol, diester, diisocyanate, bis(azlactone), bis(epoxide), diacid, or diacid chloride.
Claim 4
Dependent Claim
15 words
The copolymer according to claim 1 wherein said copolymerizable comonomer is a diamine or diol.
Claim 5
Dependent Claim
49 words
A copolymer comprising at least one triazolinethione unit having the formula ##STR20## or its tautomeric form, and copolymerizable comonomeric units, said copolymer being non-migratable and uncrosslinked, and at least 0.1 weight percent of said copolymer being capable of dissolving in dimethylformamide, dimethylacetamide, dimethyl sulfoxide, or N-methylpyrrolidone at 23° C.
Claim 6
Dependent Claim
49 words
A copolymer comprising at least one triazolinethione unit having the formula ##STR20## or its tautomeric form, and copolymerizable comonomeric units, said copolymer being non-migratable and uncrosslinked, and at least 0.1 weight percent of said copolymer being capable of dissolving in dimethylformamide, dimethylacetamide, dimethyl sulfoxide, or N-methylpyrrolidone at 23° C.
Claim 7
Dependent Claim
28 words
The copolymer according to claim 4 wherein said copolymerizable comonomer is selected from the group consisting of a diamine, diol, diester, diisocyanate, bis(azlactone), bis(epoxide), diacid, and diacid chloride.
Claim 8
Dependent Claim
63 words
A copolymer comprising at least one triazolinethione unit of the formula ##STR21## and copolymerizable comonomeric units are derived from comonomers selected from the group consisting of diester, diisocyanate, bis(azlactone), bis(epoxide), diacid, or diacide chloride, said copolymer being non-migratable and uncrosslinked, and at least 0.1 weight percent of said copolymer being capable of dissolving in dimethylformamide, dimethylacetamide, dimethyl sulfoxide, and N-methylpyrrolidone at 23° C.
Claim 9
Dependent Claim
63 words
A copolymer comprising at least one triazolinethione unit of the formula ##STR21## and copolymerizable comonomeric units are derived from comonomers selected from the group consisting of diester, diisocyanate, bis(azlactone), bis(epoxide), diacid, or diacide chloride, said copolymer being non-migratable and uncrosslinked, and at least 0.1 weight percent of said copolymer being capable of dissolving in dimethylformamide, dimethylacetamide, dimethyl sulfoxide, and N-methylpyrrolidone at 23° C.
Claim 10
Dependent Claim
88 words
A process for preparing a copolymer comprising the steps: (a) reacting a bis(hydrazide) compound with a bis(isothiocyanate) compound and a comonomer copolymerizable with at least one of said bis(hydrazide) compound or said bis(isothiocyanate) to provide a co(poly)acylthiosemicarbazide, (b) cyclodehydrating said copoly(acylthiosemicarbazide) by subjecting it to an elevated temperature in the presence of an aqueous alkaline solution to form a polyanion of a copoly(triazolinethione), (c) treating said polyanion of said copoly(triazolinethine) with aqueous acid solution to provide a copoly(triazolinethione), and (d) isolating the resulting copoly(triazolinethione), said copoly(triazolinethione) being non-migratable.
Claim 11
Dependent Claim
88 words
A process for preparing a copolymer comprising the steps: (a) reacting a bis(hydrazide) compound with a bis(isothiocyanate) compound and a comonomer copolymerizable with at least one of said bis(hydrazide) compound or said bis(isothiocyanate) to provide a co(poly)acylthiosemicarbazide, (b) cyclodehydrating said copoly(acylthiosemicarbazide) by subjecting it to an elevated temperature in the presence of an aqueous alkaline solution to form a polyanion of a copoly(triazolinethione), (c) treating said polyanion of said copoly(triazolinethine) with aqueous acid solution to provide a copoly(triazolinethione), and (d) isolating the resulting copoly(triazolinethione), said copoly(triazolinethione) being non-migratable.
Claim 12
Dependent Claim
28 words
The process according to claim 7 wherein said copolymerizable comonomer is selected from the group consisting of a diamine, diol, diester, diisocyanate, bis(azlactone), bis(epoxide), diacid, and diacid chloride.
Claim 13
Dependent Claim
118 words
A process for preparing a copoly(triazolinethione) comprising the steps: (a) providing a copoly(acylthiosemicarbazide) having units of the formula ##STR22## (b) cyclodehydrating said copoly(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 copoly(triazolinethione) having units of the formula ##STR23## wherein M is a monovalent ion and copolymerized comonomeric units, (c) treating said polyanion of said copoly(triazolinethione) with an aqueous acid solution having a pH of 6 or less to provide units of said copoly(triazolinethione) having the formula ##STR24## and copolymerized comonomeric units, (d) isolating said resulting copoly(triazolinethione), said copoly(triazolinethione) being non-migratable.
Claim 14
Dependent Claim
118 words
A process for preparing a copoly(triazolinethione) comprising the steps: (a) providing a copoly(acylthiosemicarbazide) having units of the formula ##STR22## (b) cyclodehydrating said copoly(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 copoly(triazolinethione) having units of the formula ##STR23## wherein M is a monovalent ion and copolymerized comonomeric units, (c) treating said polyanion of said copoly(triazolinethione) with an aqueous acid solution having a pH of 6 or less to provide units of said copoly(triazolinethione) having the formula ##STR24## and copolymerized comonomeric units, (d) isolating said resulting copoly(triazolinethione), said copoly(triazolinethione) being non-migratable.
Claim 15
Dependent Claim
36 words
The process according to claim 9 wherein said copoly(acylthiosemicarbazide) is prepared by reacting a bis(hydrazide) compound with a bis(isothiocyanate) compound and a comonomer copolymerizable with at least one of said bis(hydrazide) compound or said bis(isothiocyanate) compound.
Claim 16
Dependent Claim
28 words
The process according to claim 10 wherein said copolymerizable comonomer is selected from the group consisting of a diamine, diol, diester, diisocyanate, bis(azlactone), bis(epoxide), diacid, and diacid chloride.
References Cited (Backward Citations)
US3307944A
Cited
US3647451A
Cited
US3615522A
Cited
US3718468A
Cited
US3832186A
Cited
US4624995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |