US4431793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic polycarbonate end capped with branched chain alkyl acyl halide or acid
Assignee: General Electric Co
•
Filing: 1982-06-09
•
Granted: 1984-02-14
•
Expires: 2002-06-09
Abstract
Abstract Aromatic polycarbonates end-capped with branched alkyl acyl halides and/or acids from four to seven carbon atoms, inclusive, provide higher heat resistance and better impact resistance after aging at elevated temperature compared with normal alkyl acyl agents. The resins of the invention are injection molded.
Inventors
- 👤 Niles R. Rosenquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:50
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G64/14
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
45 words
A composition comprising an aromatic polycarbonate resin derived from a dihydric phenol and a carbonate precursor chain terminated with a residue having the formula ##STR10## wherein R is a branched alkyl of from four to seven carbon atoms, inclusive and X is halogen or hydroxy.
Claim 2
Dependent Claim
45 words
A composition comprising an aromatic polycarbonate resin derived from a dihydric phenol and a carbonate precursor chain terminated with a residue having the formula ##STR10## wherein R is a branched alkyl of from four to seven carbon atoms, inclusive and X is halogen or hydroxy.
Claim 3
Dependent Claim
17 words
A composition in accordance with claim 1 wherein R contains four carbon atoms and X is chlorine.
Claim 4
Dependent Claim
11 words
A composition in accordance with claim 2 wherein R is ##STR11##
Claim 5
Dependent Claim
11 words
A composition in accordance with claim 2 wherein R is ##STR12##
Claim 6
Dependent Claim
22 words
A composition in accordance with claim 1 wherein X is chlorine or hydroxy and R is five to seven carbon atoms, inclusive.
Claim 7
Dependent Claim
11 words
A composition in accordance with claim 5 wherein X is chlorine.
Claim 8
Dependent Claim
11 words
A composition in accordance with claim 6 wherein R is ##STR13##
Claim 9
Dependent Claim
11 words
A composition in accordance with claim 6 wherein R is ##STR14##
Claim 10
Dependent Claim
25 words
A composition in accordance with claim 1, 2, 3, 4, 7 or 8 wherein the aromatic polycarbonate has a repeating unit of the structure ##STR15##
Claim 11
Dependent Claim
75 words
A composition comprising an aromatic polycarbonate resin derived from a dihydric phenol and a carbonate precursor chain terminated with a residue having the formula ##STR16## wherein R is a branched alkyl of from four to seven carbon atoms, inclusive and X is halogen or hydroxy, said chain terminated aromatic polycarbonate prepared by adding a chain terminating effective amount of the compound ##STR17## to the reactor vessel initially or during the synthesis of the aromatic polycarbonate.
Claim 12
Dependent Claim
75 words
A composition comprising an aromatic polycarbonate resin derived from a dihydric phenol and a carbonate precursor chain terminated with a residue having the formula ##STR16## wherein R is a branched alkyl of from four to seven carbon atoms, inclusive and X is halogen or hydroxy, said chain terminated aromatic polycarbonate prepared by adding a chain terminating effective amount of the compound ##STR17## to the reactor vessel initially or during the synthesis of the aromatic polycarbonate.
Claim 13
Dependent Claim
17 words
A composition in accordance with claim 10 wherein R contains four carbon atoms and X is chlorine.
Claim 14
Dependent Claim
11 words
A composition in accordance with claim 11 wherein R is ##STR18##
Claim 15
Dependent Claim
11 words
A composition in accordance with claim 11 wherein R is ##STR19##
Claim 16
Dependent Claim
22 words
A composition in accordance with claim 10 wherein X is chlorine or hydroxy and R is five to seven carbon atoms, inclusive.
Claim 17
Dependent Claim
11 words
A composition in accordance with claim 14 wherein X is chlorine.
Claim 18
Dependent Claim
11 words
A composition in accordance with claim 15 wherein R is ##STR20##
Claim 19
Dependent Claim
11 words
A composition in accordance with claim 15 wherein R is ##STR21##
Claim 20
Dependent Claim
25 words
A composition in accordance with claims 10, 11, 12, 13, 16 or 17 wherein the aromatic polycarbonate has a repeating unit of the structure ##STR22##
Claim 21
Dependent Claim
71 words
A process for preparing an aromatic polycarbonate resin derived from a dihydric phenol and a carbonate precursor chain terminated with a residue having the formula ##STR23## wherein R is a branched alkyl of from four to seven carbon atoms, inclusive and X is halogen or hydroxy which comprises adding to the reactor vessel a chain terminating effective amount of the compound ##STR24## initially or during the synthesis of the aromatic polycarbonate.
Claim 22
Dependent Claim
71 words
A process for preparing an aromatic polycarbonate resin derived from a dihydric phenol and a carbonate precursor chain terminated with a residue having the formula ##STR23## wherein R is a branched alkyl of from four to seven carbon atoms, inclusive and X is halogen or hydroxy which comprises adding to the reactor vessel a chain terminating effective amount of the compound ##STR24## initially or during the synthesis of the aromatic polycarbonate.
Claim 23
Dependent Claim
17 words
A process in accordance with claim 19 wherein R contains four carbon atoms and X is chlorine.
Claim 24
Dependent Claim
11 words
A process in accordance with claim 20 wherein R is ##STR25##
Claim 25
Dependent Claim
11 words
A process in accordance with claim 20 wherein R is ##STR26##
Claim 26
Dependent Claim
22 words
A process in accordance with claim 19 wherein X is chlorine or hydroxy and R is five to seven carbon atoms, inclusive.
Claim 27
Dependent Claim
11 words
A process in accordance with claim 23 wherein X is chlorine.
Claim 28
Dependent Claim
11 words
A process in accordance with claim 24 wherein R is ##STR27##
Claim 29
Dependent Claim
11 words
A process in accordance with claim 24 wherein R is ##STR28##
Claim 30
Dependent Claim
25 words
A process in accordance with claims 19, 20, 21, 22, 25 or 26 wherein the aromatic polycarbonate has a repeating unit of the structure ##STR29##
References Cited (Backward Citations)
US3475373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |