US4313868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass filled polyamide-imide phthalamide copolymer
Assignee: BP Corp North America Inc
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Filing: 1980-04-30
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Granted: 1982-02-02
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Expires: 2000-04-30
Abstract
Abstract Novel copolymers and molding compositions are prepared from acyl halide derivatives of dicarboxylic acids, acyl halide derivatives of tricarboxylic aromatic anhydrides and aromatic diamines. Also glass filled copolymers are prepared. The copolymers are useful as engineering plastics.
Inventors
- 👤 Robert B. Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:17
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/14; C08K; C08K3/00; C08K3/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
125 words
A polyamide molding composition suitable for injection molding comprising recurring polyamide A units of ##STR6## capable of undergoing imidization wherein→denotes isomerization and polyamide B units of ##STR7## wherein the molar ratio of A units to B units is about 80 to 20 to 20 to 80 and the molding composition contains from about 30 to 50 weight percent of glass fibers, glass beads or a mixture thereof and R is a divalent aromatic hydrocarbon radical of from 6 to about 20 carbon atoms or 2 divalent hydrocarbon radicals of from about 6 to about 20 carbon atoms joined directly or by stable linkages selected from the group consisting of --O--, methylene, --CO--, --SO 2 -- and --S-- radicals and X is a divalent aromatic radical.
Claim 2
Dependent Claim
125 words
A polyamide molding composition suitable for injection molding comprising recurring polyamide A units of ##STR6## capable of undergoing imidization wherein→denotes isomerization and polyamide B units of ##STR7## wherein the molar ratio of A units to B units is about 80 to 20 to 20 to 80 and the molding composition contains from about 30 to 50 weight percent of glass fibers, glass beads or a mixture thereof and R is a divalent aromatic hydrocarbon radical of from 6 to about 20 carbon atoms or 2 divalent hydrocarbon radicals of from about 6 to about 20 carbon atoms joined directly or by stable linkages selected from the group consisting of --O--, methylene, --CO--, --SO 2 -- and --S-- radicals and X is a divalent aromatic radical.
Claim 3
Dependent Claim
27 words
The composition of claim 1 wherein the molding composition contains from about 30 to about 50 weight percent of glass fibers, glass beads or a mixture thereof.
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein R is ##STR8## and X is ##STR9##
Claim 5
Dependent Claim
11 words
Shaped article comprising reinforced polyamide copolymer as claimed in claim 1.
Claim 6
Dependent Claim
11 words
Shaped article comprising reinforced polyamide copolymer as claimed in claim 2.
Claim 7
Dependent Claim
121 words
A polyamide-imide molding composition suitable for injection molding and forming shaped articles comprising recurring A' units of ##STR10## and polyamide B units of ##STR11## wherein the molar ratio of A' units to B units is about 80 to 20 to 20 to 80, and the molding composition contains from about 30 to 50 weight percent of glass fibers, glass beads or a mixture thereof and R is a divalent aromatic hydrocarbon radical of from 6 to about 20 carbon atoms or 2 divalent hydrocarbon radicals of from about 6 to 20 carbon atoms joined directly or by stable linkages selected from the group consisting of --O--, methylene, --CO--, --SO 2 -- and --S-- radicals and X is a divalent aromatic radical.
Claim 8
Dependent Claim
121 words
A polyamide-imide molding composition suitable for injection molding and forming shaped articles comprising recurring A' units of ##STR10## and polyamide B units of ##STR11## wherein the molar ratio of A' units to B units is about 80 to 20 to 20 to 80, and the molding composition contains from about 30 to 50 weight percent of glass fibers, glass beads or a mixture thereof and R is a divalent aromatic hydrocarbon radical of from 6 to about 20 carbon atoms or 2 divalent hydrocarbon radicals of from about 6 to 20 carbon atoms joined directly or by stable linkages selected from the group consisting of --O--, methylene, --CO--, --SO 2 -- and --S-- radicals and X is a divalent aromatic radical.
Claim 9
Dependent Claim
27 words
The composition of claim 6 wherein the molding composition contains from about 30 to about 50 weight percent of glass fibers, glass beads or a mixture thereof.
Claim 10
Dependent Claim
13 words
The composition of claim 6 wherein R is ##STR12## and X is ##STR13##
Claim 11
Dependent Claim
11 words
Shaped article comprising reinforced polyamide copolymer as claimed in claim 6.
References Cited (Backward Citations)
US3984375A
Cited
US4016140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |