US4506047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate compositions having improved rigidity
Assignee: Bayer Corp
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Filing: 1983-06-06
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Granted: 1985-03-19
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Expires: 2003-06-06
Abstract
Abstract It is an object of the invention to provide a polycarbonate composition having improved mechanical properties and a process for the preparation of said composition. These objects are achieved in accordance with the present invention which teaches a blend of a polycarbonate resin and an additive amount of an aromatic bis-imide compound. The composition comprising said blend retains a surprising degree of ductility as measured by tensile elongation and yield strength and exhibits an improvement in both tensile strength and flexural modulus.
Inventors
- 👤 Mark W. Witman
- 👤 Gerard E. Reinert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:24
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415; C08K5/3417
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
90 words
A thermoplastic molding composition comprising an aromatic polycarbonate resin and about 1.0 to about 10.0%, relative to the weight of said polycarbonate resin, of at least one halogen-free bisimide compound selected from the group consisting of ##STR5## wherein R denotes a divalent aliphatic, aromatic, cycloaliphatic or mixed aliphatic-aromatic radical having 1 to 20 carbon atoms and ##STR6## wherein R' denotes a C 1 -C 20 alkyl, and cycloalkyl radical, said compound further characterized in that its melting temperature is at or below the melting temperature range of said polycarbonate resin.
Claim 2
Dependent Claim
90 words
A thermoplastic molding composition comprising an aromatic polycarbonate resin and about 1.0 to about 10.0%, relative to the weight of said polycarbonate resin, of at least one halogen-free bisimide compound selected from the group consisting of ##STR5## wherein R denotes a divalent aliphatic, aromatic, cycloaliphatic or mixed aliphatic-aromatic radical having 1 to 20 carbon atoms and ##STR6## wherein R' denotes a C 1 -C 20 alkyl, and cycloalkyl radical, said compound further characterized in that its melting temperature is at or below the melting temperature range of said polycarbonate resin.
Claim 3
Dependent Claim
22 words
The composition of claim 1 wherein said aromatic bis-imide compound is characterized in that its melting temperature is at most 260° C.
Claim 4
Dependent Claim
31 words
The composition of claim 1 wherein said R is selected from the group consisting of --CH 2 CH 2 --, --CH 2 -- 6 , and --CH 2 -- 12 .
Claim 5
Dependent Claim
26 words
The composition of claim 1 wherein said R' is a --CH 2 ) n CH 3 radical wherein n denotes an integer from 1 to 12.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-18 | 1988-09-17 | 1989-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-18 | 1992-09-17 | 1993-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-18 | 1996-09-17 | 1997-03-19 | $7700.00 | Window Closed / Lapsed |