US3966678A
Expired / Lapsed
US
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Maleic anhydride-polyaldimine prepolymers
Assignee: Rhone Poulenc SA
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Filing: 1974-09-30
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Granted: 1976-06-29
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Expires: 1994-09-30
Abstract
Abstract Multicellular polymers having excellent chemical inertness and heat resistance are produced by heating at a temperature from 100° to 300°C, maleic anhydride and a polyaldimine of the general formula A (N = CH -- G).sub.n (I) in which G represents a monovalent organic radical which contains less than 35 carbon atoms and at least one aromatic or heterocyclic ring in the α-position to the imine group in formula (I), A represents an organic radical of valency n which contains less than 50 carbon atoms and at least one aromatic or heterocyclic ring in the α-position to the imine group in formula (I), and n represents a number at least equal to 2.
Inventors
- 👤 Max Gruffaz
- 👤 Bernard Rollet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:08
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08J2379/00; C08J2379/04; C08J2379/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
284 words
A prepolymer obtained by heating maleic anhydride and a polyaldimine of the general formula: A (N = CH -- G).sub.n in which G represents a phenyl, naphthyl, pyridyl, pyrimidinyl, furyl, thienyl, benzo[b]thienyl, indolyl, triazolyl or 3,4-methylenedioxy-phenyl radical or a several said radicals connected to one another directly or via a --O--, --S--, --NH--, --COO--, --CONH--, --SO 2 --, --N=N--, --N=N(O)--, --CO-- or a linear or branched alkylene or alkenylene group with up to 8 carbon atoms, A represents a phenylene radical, a radical of the formula: ##SPC4## ##EQU4## or a divalent radical containing 12 to 30 carbon atoms, consisting of phenylene radicals bonded to one another by a simple valency bond or by --O--, --S--, --SO 2 --, --NR 1 --, --N=N--, --CONH--, --COO--, --P(O)R 1 --, --CONH--X--NHCO--, --N=N(→O)--, an alkylene group with 1 to 3 carbon atoms, ##SPC5## wherein R 1 represents a hydrogen atom, an alkyl radical with 1 to 4 carbon atoms, a phenyl radical or a cyclohexyl radical, and X represents an alkylene radical with less then 13 carbon atoms or a 3 to 5 valent naphthalene, pyridine, triazine or benzene radical or a 3 to 5 valent radical consisting of several benzene nuclei bonded to one another by a --O--, --S--, --SO 2 --, --NR 1 --, --N=N--, --CONH--, --COO--, --P(O)R 1 --, --CONH--X--NHCO--, --N=N(→O)--, an alkylene group with 1 to 3 carbon atoms, ##SPC6## wherein R 1 represents a hydrogen atom, an alkyl radical with 1 to 4 carbon atoms, a phenyl radical or a cyclohexyl radical, and X represents an alkylene radical with less than 13 carbon atoms or ##EQU5## and n represents a number at least equal to 2, at a temperature from 100° to 200°C.
Claim 2
Dependent Claim
284 words
A prepolymer obtained by heating maleic anhydride and a polyaldimine of the general formula: A (N = CH -- G).sub.n in which G represents a phenyl, naphthyl, pyridyl, pyrimidinyl, furyl, thienyl, benzo[b]thienyl, indolyl, triazolyl or 3,4-methylenedioxy-phenyl radical or a several said radicals connected to one another directly or via a --O--, --S--, --NH--, --COO--, --CONH--, --SO 2 --, --N=N--, --N=N(O)--, --CO-- or a linear or branched alkylene or alkenylene group with up to 8 carbon atoms, A represents a phenylene radical, a radical of the formula: ##SPC4## ##EQU4## or a divalent radical containing 12 to 30 carbon atoms, consisting of phenylene radicals bonded to one another by a simple valency bond or by --O--, --S--, --SO 2 --, --NR 1 --, --N=N--, --CONH--, --COO--, --P(O)R 1 --, --CONH--X--NHCO--, --N=N(→O)--, an alkylene group with 1 to 3 carbon atoms, ##SPC5## wherein R 1 represents a hydrogen atom, an alkyl radical with 1 to 4 carbon atoms, a phenyl radical or a cyclohexyl radical, and X represents an alkylene radical with less then 13 carbon atoms or a 3 to 5 valent naphthalene, pyridine, triazine or benzene radical or a 3 to 5 valent radical consisting of several benzene nuclei bonded to one another by a --O--, --S--, --SO 2 --, --NR 1 --, --N=N--, --CONH--, --COO--, --P(O)R 1 --, --CONH--X--NHCO--, --N=N(→O)--, an alkylene group with 1 to 3 carbon atoms, ##SPC6## wherein R 1 represents a hydrogen atom, an alkyl radical with 1 to 4 carbon atoms, a phenyl radical or a cyclohexyl radical, and X represents an alkylene radical with less than 13 carbon atoms or ##EQU5## and n represents a number at least equal to 2, at a temperature from 100° to 200°C.
References Cited (Backward Citations)
US3875113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |