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US4853458A
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Carboxy-functionalized polycarbonate from carboxyphenol
Assignee: General Electric Co
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Filing: 1987-10-19
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Granted: 1989-08-01
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Expires: 2007-10-19
Abstract
Abstract Carboxy-functionalized polycarbonates are prepared by incorporating a carboxylic acid-substituted phenol, preferably t-butyl p-hydroxybenzoate, as a chainstopper in a polycarbonate-forming reaction. The products are capable of forming copolymers with other polymers such as polyamides and functionalized olefin polymers, by generation of a carboxy group which reacts therewith.
Inventors
- 👤 Ronald J. Gambale
- 👤 Susan J. Hathaway
- 👤 Kathryn L. Longley
- 👤 Timothy J. Ullman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:04
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/02; C08G64/0208; C08G64/0216; C08G64/04; C08G64/06; C08G64/14; C08G81/00; C08G81/02; C08G81/024; C08G81/027
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
40 words
A carboxy-functionalized polycarbonate containing end groups of the formula ##STR10## wherein each R 1 is independently a divalent aliphatic, alicyclic or aromatic radical and A 1 is a carboxylic acid-substituted phenyl group or an ester, anhydride or imide derivative thereof.
Claim 2
Dependent Claim
40 words
A carboxy-functionalized polycarbonate containing end groups of the formula ##STR10## wherein each R 1 is independently a divalent aliphatic, alicyclic or aromatic radical and A 1 is a carboxylic acid-substituted phenyl group or an ester, anhydride or imide derivative thereof.
Claim 3
Dependent Claim
14 words
A polycarbonate according to claim 1 which comprises structural units of the formula ##STR11##
Claim 4
Dependent Claim
25 words
A polycarbonate according to claim 2 wherein A 1 is a mono- or dicarboxylic acid-substituted phenyl group or an ester, anhydride or imide derivative thereof.
Claim 5
Dependent Claim
23 words
A polycarbonate according to claim 3 wherein at least about 60% of the total number of R 1 radicals are aromatic hydrocarbon radicals.
Claim 6
Dependent Claim
50 words
A polycarbonate according to claim 4 wherein each R 1 has the formula --A.sup.2 --Y--A.sup.3 --, (III) wherein each of A 2 and A 3 is a monocyclic divalent aromatic radical and Y is a bridging radical in which one or two atoms separate A 2 from A 3 .
Claim 7
Dependent Claim
46 words
A polycarbonate according to claim 5 wherein A 1 has the formula ##STR12## wherein R 2 is hydrogen, C 1-6 alkyl or phenyl and each X is independently OH, C 1-6 alkoxy or phenoxy or both X radicals taken together are O or N--R 2 .
Claim 8
Dependent Claim
19 words
A polycarbonate according to claim 6 wherein Y is isopropylidene and A 2 and A 3 are each p-phenylene.
Claim 9
Dependent Claim
28 words
A polycarbonate according to claim 7 wherein A 1 has formula IV and R 2 is a C 4-6 tertiary alkyl radical containing at least one β-hydrogen atom.
Claim 10
Dependent Claim
48 words
A method for preparing a carboxy-functionalized polycarbonate according to claim 1 which comprises incorporating a carboxylated phenol of the formula A 1 --OH as a chainstopper in a polycarbonate-forming reaction between a carbonate source and at least one dihydroxy compound of the formula R 1 (OH) 2 .
Claim 11
Dependent Claim
38 words
A method according to claim 9 wherein A 1 is a mono- or dicarboxylic acid-substituted phenyl group or functional derivative thereof and at least about 60% of the total number of R 1 radicals are aromatic hydrocarbon radicals.
Claim 12
Dependent Claim
12 words
A method according to claim 10 wherein the carbonate source is phosgene.
Claim 13
Dependent Claim
50 words
A method according to claim 11 wherein each R 1 has the formula --A.sup.2 --Y--A.sup.3 --, (III) wherein each of A 2 and A 3 is a monocyclic divalent aromatic radical and Y is a bridging radical in which one or two atoms separate A 2 and A 3 .
Claim 14
Dependent Claim
16 words
A method according to claim 12 wherein A 1 contains an ester, anhydride or imide group.
Claim 15
Dependent Claim
46 words
A method according to claim 13 wherein A 1 has the formula ##STR13## wherein R 2 is hydrogen, C 1-6 alkyl or phenyl and each X is independently OH, C 1-6 alkoxy or phenoxy or both X radicals taken together are O or N--R 2 .
Claim 16
Dependent Claim
29 words
A method according to claim 14 wherein the proportion of chainstopper in the polycarbonate-forming reaction mixture is in the range of about 2-7 mole percent, based on dihydroxy compound.
Claim 17
Dependent Claim
19 words
A method according to claim 15 wherein Y is isopropylidene and A 2 and A 3 are each p-phenylene.
Claim 18
Dependent Claim
28 words
A method according to claim 16 wherein A 1 has formula IV and R 2 is a C 4-6 tertiary alkyl radical containing at least one β-hydrogen atom.
References Cited (Backward Citations)
US4556704A
Cited
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