US4446296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acyloxy terminated polycarbonates
Assignee: General Electric Co
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Filing: 1982-12-17
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Granted: 1984-05-01
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Expires: 2002-12-17
Abstract
Abstract Aromatic polycarbonate resins exhibiting improved heat resistance chain terminated with a residue represented by the general formula ##STR1## wherein: each R is independently selected from monovalent hydrocarbon radicals, substituted monovalent hydrocarbon radicals, or halogen radicals; a represents a whole number having a value of from 1 to 3 inclusive; n represents a whole number having a value of from 0 up to the number of replaceable hydrogen atoms present on the ring carbon atoms of the aromatic nucleus; and each Z is independently selected from radicals represented by the general formulae ##STR2## wherein R 1 is selected from rigid or bulky monovalent hydrocarbon radicals or rigid or bulky substituted monovalent hydrocarbonradicals. The instant resins may be fabricated into molded articles, films, and sheets.
Inventors
- 👤 Niles R. Rosenquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:23
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G64/14
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
111 words
An aromatic polycarbonate resin chain terminated with at least one residue represented by the general formula ##STR20## wherein: each R is independently selected from monovalent hydrocarbon radicals, substituted monovalent hydrocarbon radicals, or halogen radicals; a represents a whole number having a value of from 1 to 3 inclusive; n represents a whole number having a value of from 0 up to the number of replaceable hydrogen atoms present on the ring carbon atoms of the aromatic nuclear residue; and Z is independently selected from radicals represented by the general formulae ##STR21## wherein R 1 is selected from bulky or rigid monovalent hydrocarbon radicals or bulky or rigid substituted monovalent hydrocarbon radicals.
Claim 2
Dependent Claim
111 words
An aromatic polycarbonate resin chain terminated with at least one residue represented by the general formula ##STR20## wherein: each R is independently selected from monovalent hydrocarbon radicals, substituted monovalent hydrocarbon radicals, or halogen radicals; a represents a whole number having a value of from 1 to 3 inclusive; n represents a whole number having a value of from 0 up to the number of replaceable hydrogen atoms present on the ring carbon atoms of the aromatic nuclear residue; and Z is independently selected from radicals represented by the general formulae ##STR21## wherein R 1 is selected from bulky or rigid monovalent hydrocarbon radicals or bulky or rigid substituted monovalent hydrocarbon radicals.
Claim 3
Dependent Claim
25 words
The resin of claim 1 wherein said monovalent hydrocarbon radicals represented by R are selected from alkyl radicals, aryl radicals, aralkyl radicals, or alkaryl radicals.
Claim 4
Dependent Claim
30 words
The resin of claim 1 wherein said substituted monovalent hydrocarbon radicals represented by R are selected from substituted alkyl radicals, substituted aryl radicals, substituted aralkyl radicals, or substituted alkaryl radicals.
Claim 5
Dependent Claim
9 words
The resin of claim 1 wherein n is zero.
Claim 6
Dependent Claim
28 words
The resin of claim 1 wherein said bulky or rigid monovalent hydrocarbon radicals are selected from branched alkyl radicals, cycloalkyl radicals, alkyl substituted cycloalkyl radicals, or aryl radicals.
Claim 7
Dependent Claim
18 words
The resin of claim 5 wherein said branched alkyl radicals contain from 3 to about 8 carbon atoms.
Claim 8
Dependent Claim
17 words
The resin of claim 5 wherein said cycloalkyls contain from 4 to about 7 ring carbon atoms.
Claim 9
Dependent Claim
34 words
The resin of claim 5 wherein said alkyl substituted cycloalkyl radicals contain from 4 to about 7 ring carbon atoms and from 1 to about 3 substituent alkyl groups on the ring carbon atoms.
Claim 10
Dependent Claim
48 words
The resin of claim 5 wherein said aryl radicals are represented by the general formula ##STR22## wherein: each R 3 is independently selected from alkyl radicals, aryl radicals, aralkyl radicals, or alkaryl radicals; and b represents a whole number having a value of from 0 to 5 inclusive.
Claim 11
Dependent Claim
17 words
The resin of claim 9 wherein said aromatic polycarbonate is derived from bisphenol-A and a carbonate precursor.
Claim 12
Dependent Claim
11 words
The resin of claim 10 wherein said carbonate precursor is phosgene.
Claim 13
Dependent Claim
33 words
The resin of claim 1 wherein said bulky or rigid substituted monovalent hydrocarbon radicals are selected from substituted branched alkyl radicals, substituted cycloalkyl radicals, substituted alkyl substituted cycloalkyl radicals, or substituted aryl radicals.
Claim 14
Dependent Claim
38 words
The resin of claim 1 wherein Z is independently selected from radicals represented by the general formula ##STR23## wherein R 1 is selected from bulky or rigid monovalent hydrocarbon radicals or bulky or rigid substituted monovalent hydrocarbon radicals.
Claim 15
Dependent Claim
13 words
The resin of claim 13 wherein a is 2 and n is zero.
Claim 16
Dependent Claim
17 words
The resin of claim 13 wherein R 1 is selected from bulky or rigid monovalent hydrocarbon radicals.
Claim 17
Dependent Claim
28 words
The resin of claim 15 wherein said bulky or rigid monovalent hydrocarbon radicals are selected from branched alkyl radicals, cycloalkyl radicals, alkyl substituted cycloalkyl radicals, or aryl radicals.
Claim 18
Dependent Claim
18 words
The resin of claim 16 wherein said bulky or rigid monovalent hydrocarbon radicals are selected from alkyl radicals.
Claim 19
Dependent Claim
47 words
The resin of claim 16 wherein said aryl radicals are represented by the general formula ##STR24## wherein R 3 is independently selected from alkyl radicals, aryl radicals, alkaryl radicals, or aralkyl radicals; and b is a whole number having a value of from 0 to 5 inclusive.
Claim 20
Dependent Claim
17 words
The resin of claim 18 wherein said aromatic polycarbonate is derived from bisphenol-A and a carbonate precursor.
Claim 21
Dependent Claim
11 words
The resin of claim 19 wherein said carbonate precursor is phosgene.
Claim 22
Dependent Claim
9 words
The resin of claim 18 wherein b is one.
Claim 23
Dependent Claim
13 words
The resin of claim 21 wherein R 3 is a tertiary butyl radical.
Claim 24
Dependent Claim
9 words
The resin of claim 22 wherein n is zero.
Claim 25
Dependent Claim
17 words
The resin of claim 1 wherein said aromatic polycarbonate is derived from bisphenol-A and a carbonate precursor.
Claim 26
Dependent Claim
11 words
The resin of claim 24 wherein said carbonate precursor is phosgene.
Claim 27
Dependent Claim
14 words
The resin of claim 25 wherein said residue is represented by the formula ##STR25##
References Cited (Backward Citations)
WO1982002389A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |