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US4115372A
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Novel copolyamideimides
Assignee: Pharmacia and Upjohn Co
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Filing: 1977-01-21
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Granted: 1978-09-19
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Expires: 1997-01-21
Abstract
Abstract Novel solvent soluble and injection moldable copolyamideimides are disclosed that are characterized in that from about 30 percent to about 70 percent of the recurring units are <IMAGE> and in the remaining 30-70 percent of the recurring units are <IMAGE> wherein CnH2n represents alkylene from 7 to 12 carbon atoms, inclusive, and Ar is <IMAGE> where X = -SO2-, -CO-, -O-, or alkylene (C1-4). The copolyamideimides are further characterized by ease of melt processing such as by extruding or injection molding while at the same time prossessing good high temperature stability and unexpectedly high impact and tensile yield strengths.
Inventors
- 👤 Kemal B. Onder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:48
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/14; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
A copolyamideimide characterized by solvent solubility, injection moldability, and an inherent viscosity of at least 0.5 measured at 30° C. using a 0.5 weight percent solution of said copolyamideimide dissolved in N-methylpyrrolidone or m-cresol and further characterized by having from about 30 percent to about 70 percent of the recurring units of the formula: ##STR13## and the remaining 30 percent to 70 percent of the recurring units of the formula: ##STR14## wherein C n H 2n represents alkylene from 7 to 12 carbon atoms, inclusive, and Ar is the divalent radical ##STR15## wherein X is selected from the group consisting of --SO 2 --, --CO--, --O--, and alkylene from 1 to 4 carbon atoms, inclusive.
Claim 2
Dependent Claim
115 words
A copolyamideimide characterized by solvent solubility, injection moldability, and an inherent viscosity of at least 0.5 measured at 30° C. using a 0.5 weight percent solution of said copolyamideimide dissolved in N-methylpyrrolidone or m-cresol and further characterized by having from about 30 percent to about 70 percent of the recurring units of the formula: ##STR13## and the remaining 30 percent to 70 percent of the recurring units of the formula: ##STR14## wherein C n H 2n represents alkylene from 7 to 12 carbon atoms, inclusive, and Ar is the divalent radical ##STR15## wherein X is selected from the group consisting of --SO 2 --, --CO--, --O--, and alkylene from 1 to 4 carbon atoms, inclusive.
Claim 3
Dependent Claim
29 words
A copolyamideimide according to claim 1 wherein said C n H 2n has the formula --CH 2 ) n wherein n is an integer from 7 to 12 inclusive.
Claim 4
Dependent Claim
13 words
A copolyamideimide according to claim 1 wherein said divalent radical Ar is 4,4'-methylenebis(phenylene).
Claim 5
Dependent Claim
81 words
A copolyamideimide characterized by solvent solubility, injection moldability, and an inherent viscosity of at least 0.5 measured at 30° C. using a 0.5 weight percent solution of said copolyamideimide dissolved in N-methylpyrrolidone or m-cresol and further characterized by having from about 40 percent to about 60 percent of the recurring units of the formula: ##STR16## wherein n is an integer from 7 to 12 inclusive, and the remaining 40 percent to 60 percent of the recurring units of the formula: ##STR17##
Claim 6
Dependent Claim
81 words
A copolyamideimide characterized by solvent solubility, injection moldability, and an inherent viscosity of at least 0.5 measured at 30° C. using a 0.5 weight percent solution of said copolyamideimide dissolved in N-methylpyrrolidone or m-cresol and further characterized by having from about 40 percent to about 60 percent of the recurring units of the formula: ##STR16## wherein n is an integer from 7 to 12 inclusive, and the remaining 40 percent to 60 percent of the recurring units of the formula: ##STR17##
Claim 7
Dependent Claim
11 words
A copolyamideimide according to claim 4 wherein said n = 7.
Claim 8
Dependent Claim
23 words
A copolyamideimide according to claim 5 wherein about 50 percent of the recurring units are ##STR18## and the remaining 50 percent are ##STR19##
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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |