US4296232A
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Process for preparing polyarylates in the presence of a diphenyl ether compound and a catalyst
Assignee: BP Corp North America Inc
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Filing: 1979-08-27
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Granted: 1981-10-20
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Expires: 1999-08-27
Abstract
Abstract Described herein is a process for preparing polyarylates which comprises reacting a diester derivative of a dihydric phenol with an aromatic dicarboxylic acid in the presence of from about 10 to about 60 weight percent of a diphenyl ether compound at a temperature of from about 260 DEG to about 350 DEG C. and in the presence of a magnesium catalyst.
Inventors
- 👤 Louis M. Maresca
- 👤 Peter J. Gill
- 👤 Mitchell H. Berger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:00
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08G63/78; C08G63/81; C08G63/82; C08G63/83
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
189 words
A process for preparing a polyarylate having a reduced viscosity of from about 0.5 to greater than 1.0 dl/gm, which process comprises reacting: (a) at least one diester derivative of a dihydric phenol having the following formula: ##STR3## wherein R is independently selected from an alkyl radical having from 1 to about 6 carbon atoms or cycloalkyl having from 4 to about 7 carbon atoms, y is independently selected from alkyl groups of 1 to 4 carbon atoms, chlorine, or bromine, z independently has a value of from 0 to 4, inclusive, and R' is independently selected from a divalent saturated aliphatic hydrocarbon radical having 1 to 8 carbon atoms, a cycloalkylene, or cycloalkylidene radical having up to and including 9 carbon atoms, O S, SO, SO 2 , CO, x is 0 or 1; with (b) at lease one aromatic dicarboxylic acid, in the presence of from about 10 to about 60 weight percent, based on the polyarylate produced, of a diphenyl ether compound, at a temperature of from about 260° to about 350° C. and in the presence of a catalytically effective amount of a magnesium catalyst.
Claim 2
Dependent Claim
189 words
A process for preparing a polyarylate having a reduced viscosity of from about 0.5 to greater than 1.0 dl/gm, which process comprises reacting: (a) at least one diester derivative of a dihydric phenol having the following formula: ##STR3## wherein R is independently selected from an alkyl radical having from 1 to about 6 carbon atoms or cycloalkyl having from 4 to about 7 carbon atoms, y is independently selected from alkyl groups of 1 to 4 carbon atoms, chlorine, or bromine, z independently has a value of from 0 to 4, inclusive, and R' is independently selected from a divalent saturated aliphatic hydrocarbon radical having 1 to 8 carbon atoms, a cycloalkylene, or cycloalkylidene radical having up to and including 9 carbon atoms, O S, SO, SO 2 , CO, x is 0 or 1; with (b) at lease one aromatic dicarboxylic acid, in the presence of from about 10 to about 60 weight percent, based on the polyarylate produced, of a diphenyl ether compound, at a temperature of from about 260° to about 350° C. and in the presence of a catalytically effective amount of a magnesium catalyst.
Claim 3
Dependent Claim
20 words
A process as defined in claim 1 wherein the diester derivative of a dihydric phenol has the following formula: ##STR4##
Claim 4
Dependent Claim
12 words
A process as defined in claim 2 wherein each z is 0.
Claim 5
Dependent Claim
21 words
A process as defined in claim 1 wherein the aromatic dicarboxylic acid is a mixture of isophthalic acid and terephthalic acid.
Claim 6
Dependent Claim
24 words
A process as defined in claim 4 wherein the isophthalic acid to terephthalic acid ratio in the mixture is about 20:80 to about 100:0.
Claim 7
Dependent Claim
30 words
A process as defined in claim 1 wherein the diphenyl ether is substituted with alkyl groups, chlorine, bromine, or any substituent which does not interfere with the polyarylate forming reaction.
Claim 8
Dependent Claim
22 words
A process as defined in claim 1 wherein the polyarylate produced has a reduced viscosity of from about 0.5 to about 0.8.
Claim 9
Dependent Claim
25 words
A process as defined in claim 1 wherein the diphenyl ether is present in an amount of from about 25 to about 40 weight percent.
Claim 10
Dependent Claim
18 words
A process as defined in claim 1 wherein the temperature is between about 275° to about 295° C.
Claim 11
Dependent Claim
19 words
A process as defined in claim 1 wherein the magnesium catalyst is a magnesium salt of an organic acid.
Claim 12
Dependent Claim
13 words
A process as defined in claim 10 wherein the catalyst is magnesium acetate.
Claim 13
Dependent Claim
171 words
A process for preparing a polyarylate having a reduced viscosity of from about 0.5 to greater than 1.0 dl/gm which process comprises reacting: (a) an acid anhydride derived from acids containing from 2 to 8 carbon atoms; (b) at least one dihydric phenol having the following formula: ##STR5## wherein y is independently selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, z independently has a value of from 0 to 4, inclusive, R' is independently selected from a divalent saturated hydrocarbon radical having 1 to 8 carbon atoms, a cycloalkylene, or cycloalkylidene radical having up to and including 9 carbon atoms, O, S, SO, SO 2 , CO, x is 0 or 1; and (c) at least one aromatic dicarboxylic acid, in the presence of from about 10 to about 60 weight percent, based on the polyarylate produced, of a diphenyl ether compound, at a temperature of from about 260° to about 350° C. and in the presence of a catalytically effective amount of a magnesium catalyst.
Claim 14
Dependent Claim
171 words
A process for preparing a polyarylate having a reduced viscosity of from about 0.5 to greater than 1.0 dl/gm which process comprises reacting: (a) an acid anhydride derived from acids containing from 2 to 8 carbon atoms; (b) at least one dihydric phenol having the following formula: ##STR5## wherein y is independently selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, z independently has a value of from 0 to 4, inclusive, R' is independently selected from a divalent saturated hydrocarbon radical having 1 to 8 carbon atoms, a cycloalkylene, or cycloalkylidene radical having up to and including 9 carbon atoms, O, S, SO, SO 2 , CO, x is 0 or 1; and (c) at least one aromatic dicarboxylic acid, in the presence of from about 10 to about 60 weight percent, based on the polyarylate produced, of a diphenyl ether compound, at a temperature of from about 260° to about 350° C. and in the presence of a catalytically effective amount of a magnesium catalyst.
Claim 15
Dependent Claim
14 words
A process as defined in claim 12 wherein the acid anhydride is acetic anhydride.
Claim 16
Dependent Claim
16 words
A process as defined in claim 12 wherein the dihydric phenol has the following formula: ##STR6##
Claim 17
Dependent Claim
12 words
A process as defined in claim 14 wherein each z is 0.
Claim 18
Dependent Claim
21 words
A process as defined in claim 12 wherein the aromatic dicarboxylic acid is a mixture of isophthalic acid and terephthalic acid.
Claim 19
Dependent Claim
24 words
A process as defined in claim 16 wherein the isophthalic acid to terephthalic acid ratio in the mixture is about 20:80 to about 100:0.
Claim 20
Dependent Claim
19 words
A process as defined in claim 12 wherein the magnesium catalyst is a magnesium salt of an organic acid.
Claim 21
Dependent Claim
14 words
A process as defined in claim 18 wherein the magnesium catalyst is magnesium acetate.
References Cited (Backward Citations)
US2595343A
Cited
US3317464A
Cited
US3329653A
Cited
US3225003A
Cited
US3684766A
Cited
US3780148A
Cited
US3824213A
Cited
US3948856A
Cited
US4075173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |