Patent US4898923A successfully refreshed from Google Patents.
US4898923A
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Polypyridinium copolymer
Assignee: 3M Co
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Filing: 1989-03-01
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Granted: 1990-02-06
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Expires: 2009-03-01
Abstract
Abstract A novel class of polymers comprises one or more dipyridinium units, having the formula ##STR1## contained within the main polymer backbone where Ar 1 , Ar 2 , and Ar 3 are aromatic or heteroaromatic nuclei each of which can consist of one ring or two fused or catenated rings having 5 to 12 ring carbon and heteroatoms which can include 1 to 3 unitary heteroatoms selected from S, N, and O, R 1 is any divalent organic bridging group, and Z.sup.⊖ is a counterion.
Inventors
- 👤 Alan R. Katritzky
- 👤 Larry R. Krepski
- 👤 Jerald K. Rasmussen
- 👤 Steven M. Heilmann
- 👤 Richard D. Tarr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:48
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0622; C08G73/0627
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
75 words
A copolymer comprising at least one dipyridinium unit having the formula: ##STR36## wherein Ar 1 , Ar 2 , and Ar 3 are the same or different aromatic or heteroaromatic group each of which contains one ring or two fused or catenated rings having 5 to 12 ring carbon or heteroatoms, R 1 is any divalent organic bridging group, and Z.sup.⊖ is a counterion, said copolymer further comprising copolymeric units derived from amine-reactive difunctional comonomers.
Claim 2
Dependent Claim
75 words
A copolymer comprising at least one dipyridinium unit having the formula: ##STR36## wherein Ar 1 , Ar 2 , and Ar 3 are the same or different aromatic or heteroaromatic group each of which contains one ring or two fused or catenated rings having 5 to 12 ring carbon or heteroatoms, R 1 is any divalent organic bridging group, and Z.sup.⊖ is a counterion, said copolymer further comprising copolymeric units derived from amine-reactive difunctional comonomers.
Claim 3
Dependent Claim
47 words
The copolymer according to claim 1 wherein said bridging group is selected from the group consisting of an alkylene group having 2 to 20 carbon atoms, an arylene group having 2 to 20 carbon atoms, a polyoxyalkylene group, a dimer acid based group, and a polysiloxane group.
Claim 4
Dependent Claim
23 words
The copolymer according to claim 1 wherein said heteroatoms of each heteroarmatic group comprises 1 to 3 unitary S, N, or O atoms.
Claim 5
Dependent Claim
55 words
The copolymer according to claim 1 wherein said ring carbon atoms are substituted by atoms and groups selected from the class consisting of halogen atoms, and C 1 to C 10 alkyl, C 1 to C 10 alkoxy, N,N-di(C 1 to C 10 alkyl)amino, nitro, cyano, SO 3 .sup.⊖, CO 2 .sup.⊖ and trifluoromethyl groups
Claim 6
Dependent Claim
23 words
The copolymer according to claim 1 wherein said comonomers are selected from the group consisting of diisocyanates, diacids, diacid chlorides, diesters, and bis(azlactones).
Claim 7
Independent Claim
102 words
A method for preparing a copolymer comprising polypyridinium units comprising the steps of: (a) reacting a mixture of a bis(pyrylium) salt and copolymeric units derived from amine-reactive difunctional comonomers, said bis(pyrylium) salt having the formula ##STR37## wherein Ar 1 , Ar 2 , and Ar 3 are as previously defined, and Z.sup.⊖ is a counterion with a diamine having the formula H.sub.2 N--R.sup.1 --NH.sub.2 wherein R 1 is a divalent organic bridging group, in the presence of an organic base, (b) adding acid in excess relative to the amount of organic base present, and (c) isolating the resulting copolymer comprising polypyridinium units.
Claim 8
Independent Claim
102 words
A method for preparing a copolymer comprising polypyridinium units comprising the steps of: (a) reacting a mixture of a bis(pyrylium) salt and copolymeric units derived from amine-reactive difunctional comonomers, said bis(pyrylium) salt having the formula ##STR37## wherein Ar 1 , Ar 2 , and Ar 3 are as previously defined, and Z.sup.⊖ is a counterion with a diamine having the formula H.sub.2 N--R.sup.1 --NH.sub.2 wherein R 1 is a divalent organic bridging group, in the presence of an organic base, (b) adding acid in excess relative to the amount of organic base present, and (c) isolating the resulting copolymer comprising polypyridinium units.
Claim 9
Dependent Claim
21 words
The method according to claim 6 wherein said bis(pyrylium) salt, said diamine, and said organic base are present in equimolar amounts.
Claim 10
Dependent Claim
18 words
The method according to claim 6 wherein said components of step (a) further comprise a nonreactive organic solvent.
Claim 11
Dependent Claim
22 words
The method according to claim 6 wherein said acid is added in an amount of 2 equivalents compared to said organic base.
Claim 12
Dependent Claim
14 words
The method according to claim 6 wherein said acid is an organic carboxylic acid.
Claim 13
Dependent Claim
16 words
The method according to claim 6 wherein said organic base is an amine or aza compound.
References Cited (Backward Citations)
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