Patent US4001142A successfully refreshed from Google Patents.
US4594404A
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Polycarbonates having improved hydrolytic stability
Assignee: BP Corp North America Inc
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Filing: 1984-03-20
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Granted: 1986-06-10
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Expires: 2004-03-20
Abstract
Abstract This invention relates to moldable polycarbonate compositions and in particular to moldable polycarbonates which have ordered alternating repeating units derived from bis-(3,5-dimethyl-4-hydroxyphenyl)sulfone (TMBS) and 2,2-bis-(4-hydroxyphenyl)propane (Bisphenol A) dihaloformate, or ordered, alternating repeating units derived from bis-(3,5-dimethyl-4-hydroxyphenyl) sulfone (TMBS) dihaloformate and a bisphenol compound such as 2,2-bis-(4-hydroxyphenyl)propane (Bisphenol A). Such polycarbonates exhibit improved hydrolytic stability and also excellent processability in molding applications.
Inventors
- 👤 James H. Kawakami
- 👤 James E. Harris
- 👤 Louis M. Maresca
- 👤 Lloyd M. Robeson
- 👤 Robert J. Cotter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:36
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G64/08; C08G64/081
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
137 words
A composition comprising a polycarbonate containing ordered, alternating repeating units having the formula ##STR22## in an amount sufficient to enhance hydrolytic stability of the polycarbonate, wherein Y is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, each z, independently, has a value of from 0 to 4 inclusive, n has a value of 0 or 1, R 1 is a divalent saturated or unsaturated hydrocarbon radical, O, CO, SO 2 , S or a direct bonds, with the proviso that when R 1 is SO 2 then the subunit having the formula ##STR23## is not the same as the subunit having the formula ##STR24## and wherein the polycarbonate has a reduced viscosity of at least about 0.3 dl/g as measured in chloroform at a concentration of 0.5 g/100 ml at 25° C.
Claim 2
Dependent Claim
137 words
A composition comprising a polycarbonate containing ordered, alternating repeating units having the formula ##STR22## in an amount sufficient to enhance hydrolytic stability of the polycarbonate, wherein Y is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, each z, independently, has a value of from 0 to 4 inclusive, n has a value of 0 or 1, R 1 is a divalent saturated or unsaturated hydrocarbon radical, O, CO, SO 2 , S or a direct bonds, with the proviso that when R 1 is SO 2 then the subunit having the formula ##STR23## is not the same as the subunit having the formula ##STR24## and wherein the polycarbonate has a reduced viscosity of at least about 0.3 dl/g as measured in chloroform at a concentration of 0.5 g/100 ml at 25° C.
Claim 3
Dependent Claim
19 words
A composition as defined in claim 1 wherein the polycarbonate contains ordered, alternating repeating units having the formula ##STR25##
Claim 4
Dependent Claim
19 words
A composition as defined in claim 1 wherein the polycarbonate contains ordered, alternating repeating units having the formula ##STR26##
Claim 5
Dependent Claim
33 words
A composition as defined in claim 1 wherein the polycarbonate has a reduced viscosity of at least about 0.5 dl/g as measured in chloroform at a concentration of 0.5 g/100 at 25° C.
Claim 6
Dependent Claim
178 words
A process for preparing a polycarbonate comprising ordered, alternating repeating units having the formula ##STR27## in an amount sufficient to enhance hydrolytic stability of the polycarbonate, wherein Y is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, each z, independently, has a value of from 0 to 4 inclusive, n has a value of 0 or 1, R 1 is a divalent saturated or unsaturated hydrocarbon radical, O, CO, SO 2 , S or a direct bond, with the proviso that when R 1 is SO 2 then the subunit having the formula ##STR28## is not the same as the subunit having the formula ##STR29## and wherein the polycarbonate has a reduced viscosity of at least about 0.3 dl/g as measured in chloroform at a concentration of 0.5 g/100 ml at 25° C., which process comprises reacting a compound having the formula ##STR30## wherein Y, z, n and R 1 are as defined above and X is halogen, and a bisphenol compound having the formula ##STR31## in amounts sufficient to form the polycarbonate.
Claim 7
Dependent Claim
178 words
A process for preparing a polycarbonate comprising ordered, alternating repeating units having the formula ##STR27## in an amount sufficient to enhance hydrolytic stability of the polycarbonate, wherein Y is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, each z, independently, has a value of from 0 to 4 inclusive, n has a value of 0 or 1, R 1 is a divalent saturated or unsaturated hydrocarbon radical, O, CO, SO 2 , S or a direct bond, with the proviso that when R 1 is SO 2 then the subunit having the formula ##STR28## is not the same as the subunit having the formula ##STR29## and wherein the polycarbonate has a reduced viscosity of at least about 0.3 dl/g as measured in chloroform at a concentration of 0.5 g/100 ml at 25° C., which process comprises reacting a compound having the formula ##STR30## wherein Y, z, n and R 1 are as defined above and X is halogen, and a bisphenol compound having the formula ##STR31## in amounts sufficient to form the polycarbonate.
Claim 8
Dependent Claim
18 words
A process as defined in claim 5 wherein the compound having the formula (III) is Bisphenol A dichloroformate.
Claim 9
Dependent Claim
18 words
A process as defined in claim 5 wherein the compound having the formula (III) is Bisphenol S dichloroformate.
Claim 10
Dependent Claim
10 words
A polycarbonate prepared according to the process of claim 5.
Claim 11
Dependent Claim
10 words
A molded article prepared from the polycarbonate of claim 8.
Claim 12
Dependent Claim
178 words
A process for preparing a polycarbonate comprising ordered, alternating repeating units having the formula ##STR32## in an amount sufficient to enhance hydrolytic stability of the polycarbonate, wherein Y is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, each z, independently, has a value of from 0 to 4 inclusive, n has a value of 0 or 1, R 1 is a divalent saturated or unsaturated hydrocarbon radical, O, CO, SO 2 , S or a direct bond, with the proviso that when R 1 is SO 2 then the subunit having the formula ##STR33## is not the same as the subunit having the formula ##STR34## and wherein the polycarbonate has a reduced viscosity of at least about 0.3 dl/g as measured in chloroform at a concentration of 0.5 g/100 ml at 25° C. which process comprises reacting a compound having the formula ##STR35## wherein X is halogen, and a bisphenol compound having the formula ##STR36## wherein Y, z, n and R 1 are as defined above, in amounts sufficient to form the polycarbonate.
Claim 13
Dependent Claim
178 words
A process for preparing a polycarbonate comprising ordered, alternating repeating units having the formula ##STR32## in an amount sufficient to enhance hydrolytic stability of the polycarbonate, wherein Y is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, each z, independently, has a value of from 0 to 4 inclusive, n has a value of 0 or 1, R 1 is a divalent saturated or unsaturated hydrocarbon radical, O, CO, SO 2 , S or a direct bond, with the proviso that when R 1 is SO 2 then the subunit having the formula ##STR33## is not the same as the subunit having the formula ##STR34## and wherein the polycarbonate has a reduced viscosity of at least about 0.3 dl/g as measured in chloroform at a concentration of 0.5 g/100 ml at 25° C. which process comprises reacting a compound having the formula ##STR35## wherein X is halogen, and a bisphenol compound having the formula ##STR36## wherein Y, z, n and R 1 are as defined above, in amounts sufficient to form the polycarbonate.
Claim 14
Dependent Claim
18 words
A process as defined in claim 10 wherein the compound having the formula (V) is bis-(3,5-dimethyl-4-hydroxyphenyl)sulfone (TMBS) dichloroformate.
Claim 15
Dependent Claim
17 words
A process as defined in claim 10 wherein the compound having the formula (VI) is Bisphenol A.
Claim 16
Dependent Claim
17 words
A process as defined in claim 10 wherein the compound having the formula (VI) is Bisphenol S.
Claim 17
Dependent Claim
10 words
A polycarbonate prepared according to the process of claim 10.
Claim 18
Dependent Claim
10 words
A molded article prepared from the polycarbonate of claim 14.
Claim 19
Dependent Claim
10 words
A molded article prepared from the composition of claim 1.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
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