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US3879347A
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High molecular, statistical copolycarbonates
Assignee: Bayer AG
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Filing: 1972-06-20
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Granted: 1975-04-22
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Expires: 1992-06-20
Abstract
Abstract Statistical copolycarbonates based on aromatic dihydroxy compounds and containing at least 50 mole % of identical or different structural units of the general formula:
Inventors
- 👤 Volker Serini
- 👤 Hugo Vernaleken
- 👤 Hermann Schnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:37
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G64/20; C08G64/22; C08G64/24; C08G64/26; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
25 words
STATISTICAL COPOLYCARBONATES BASED ON AROMATIC DIHYDROXY COMPOUNDS AND COMPRISING AT LEAST 50 MOL % OF IDENTICAL OR DIFFERENT TETRAALKYLATED STTUCTURAL UNITS OF THE GENERAL FORMULA
Claim 2
Dependent Claim
25 words
STATISTICAL COPOLYCARBONATES BASED ON AROMATIC DIHYDROXY COMPOUNDS AND COMPRISING AT LEAST 50 MOL % OF IDENTICAL OR DIFFERENT TETRAALKYLATED STTUCTURAL UNITS OF THE GENERAL FORMULA
Claim 3
Dependent Claim
25 words
Statistical copolycarbonates based on aromatic dihydroxy compounds and comprising at least 50 mol % of identical or different tetraalkylated structural units of the general formula
Claim 4
Dependent Claim
25 words
Statistical copolycarbonates based on aromatic dihydroxy compounds and comprising at least 50 mol % of identical or different tetraalkylated structural units of the general formula
Claim 5
Dependent Claim
46 words
The copolycarbonates of claIm 1 wherein the tetraalkylated structural units are residues of aromatic dihydroxy compounds selected from the group consisting of: bis-(3,5-dimethyl-4-hydroxyphenyl)-methane and 2,2-bis-(3,5-dimethyl-4-hydroxyphenyl)-propane and the remaining structural units are residues of aromatic dihydroxy compounds selected from the group consisting of: 2,2-bis-(4-hydroxyphenyl)-propane, 2,2-bis-(3,5-dichloro-4-hydroxyphenyl)-propane and 2,2-bis-(3,5-dibromo-4-hydroxyphenyl)-propane.
Claim 6
Dependent Claim
10 words
The copolycarbonates of claim 1 containing no saponifiable chlorine constituents.
Claim 7
Dependent Claim
37 words
The copolycarbonates of claim 1 wherein the remaining structural units are residues of aromatic dihydroxy compounds selected from the group consisting of: hydroquinone; resorcinol; dihydroxydiphenyls; bis-(hydroxyphenyl)-alkanes; bis-(hydroxyphenyl)-cycloalkanes; bis-(hydroxyphenyl)-sulfides; bis-(hydroxyphenyl)-ethers; bis-(hydroxyphenyl)-ketones; bis-(hydroxyphenyl)-sulfoxides; bis-(hydroxyphenyl)-sulfones and Alpha , Alpha ''-bis-(hydroxyphenyl)-diisopropylbenzenes.
Claim 8
Dependent Claim
32 words
The copolycarbonates of claim 1 wherein the remaining structural units are residues of aromatic dihydroxy compounds selected from the group consisting of: 4,4''-dihydroxydiphenyl; 2, 2-bis-(4-hydroxyphenyl)-propane; 2,2-bis-(3,5-dichloro-4-hydroxyphenyl)-propane; 2,2-bis-(3,5-dibromo-4-hydroxyphenyl)-propane and Alpha , Alpha ''-bis-(4-hydroxyphenyl)-p-diisopropylbenzene.
Claim 9
Dependent Claim
30 words
The copolycarbonates of claim 1 wherein the tetraalkylated structural units are residues of aromatic dihydroxy compounds selected from the group consisting of: bis-(3,5-dimethyl-4-hydroxyphenyl)-methane; bis-(3,5-diisopropyl-4-hydroxyphenyl)-methane; 2,2-bis-(3-methyl-5-isopropyl-4-hydroxyphenyl)-propane; 2,2-bis-(3,5-dimethyl-4-hydroxyphenyl)-propane; 2,2-bis-(3,5-diethyl-4-hydroxyphenyl)-propane; 3,3-bis-(3,5-dimethyl-4-hydroxyphenyl)-pentane; 1,1-bis-(3,5-dimethyl-4-hydroxyphenyl)-cyclohexane; 1,4-bis-(3,5-dimethyl-4-hydroxyphenyl)-cyclohexane.
Claim 10
Dependent Claim
14 words
The copolycarbonates of claim 1 wherein the tetraalkylated structural units are residues of 2,2-bis-(3,5-dimethyl-4-hydroxyphenyl)-propane.
Claim 11
Dependent Claim
23 words
A process for the production of the copolycarbonates of claim 1 comprising reacting at least one tetraalkylated aromatic dihydroxy compound of the formula
Claim 12
Dependent Claim
43 words
The process of claim 8 wherein a mono- and/or bis-chlorocarbonic acid ester of at least one tetraalkylated aromatic dihydroxy compound is reacted with a mono- and/or bis-chlorocarbonic acid ester of the at least one other aromatic dihydroxy compound in the absence of phosgene.
Claim 13
Dependent Claim
46 words
The process of claim 8 wherein the at least one tetraalkylated aromatic dihydroxy compound is reacted with the at least one other aromatic dihydroxy compound and phosgene and wherein all of the at least 1.05 equivalents of chlorine-bonded-via-carbonyl per hydroxyl equivalent is provided by the phosgene.
Claim 14
Dependent Claim
14 words
The process of claim 8 carried out in the presence of a chain stopper.
Claim 15
Dependent Claim
29 words
The process of claim 8 wherein the at least one tetraalkylated aromatic dihydroxy compound is selected from the group consisting of: bis-(3,5-dimethyl-4-hydroxyphenyl)-methane; bis-(3,5-diisopropyl-4-hydroxyphenyl)-methane; 2,2-bis-(3-methyl-5-isopropyl-4-hydroxyphenyl)-propane; 2,2-bis-(3,5-dimethyl-4-hydroxyphenyl)-propane; 2,2-bis-(3,5-diethyl-4-hydroxyphenyl)-propane; 3,3-bis-(3,5-dimethyl-4-hydroxyphenyl)-pentane; 1,1-bis-(3,5-dimethyl-4-hydroxyphenyl)-cyclohexane; 1,4-bis-(3,5-dimethyl-4-hydroxyphenyl)-cyclohexane.
Claim 16
Dependent Claim
16 words
The process of claim 8 wherein the at least one tetraalkylated aromatic dihydroxy compound is 2,2-bis-(3,5-dimethyl-4-hydroxyphenyl)-propane.
Claim 17
Dependent Claim
36 words
The process of claim 8 wherein the at least one other aromatic dihydroxy compound is selected from the group consisting of: hydroquinone; resorcinol; dihydroxydiphenyls; bis-(hydroxyphenyl)-alkanes; bis-(hydroxyphenyl)-cycloalkanes; bis-(hydroxyphenyl)-sulfides; bis-(hydroxyphenyl)-ethers; bis-(hydroxyphenyl)-ketones; bis-(hydroxyphenyl)-sulfoxides; bis-(hydroxyphenyl)-sulfones and Alpha , Alpha ''-bis-(hydroxyphenyl)-diisopropylbenzenes.
Claim 18
Dependent Claim
31 words
The process of claim 8 wherein the at least one other aromatic dihydroxy compound is selected from the group consisting of: 4,4''-dihydroxydiphenyl; 2,2-bis-(4-hydroxyphenyl)-propane; 2, 2-bis-(3,5-dichloro-4-hydroxyphenyl)-propane; 2,2-bis-(3,5-dibromo-4-hydroxyphenyl)-propane and Alpha , Alpha ''-bis-(4-hydroxyphenyl)-p-diisopropylbenzene.
Claim 19
Dependent Claim
21 words
The process of claim 8 wherein the aliphatic tertiary amine concentration is 0.012 to 0.1 mol per liter of two-phase mixture.
Claim 20
Dependent Claim
14 words
The process of claim 8 wherein the reaction time is 0.05 to 5 hours.
Claim 21
Dependent Claim
24 words
The process of claim 8 wherein the aliphatic tertiary amine is selected from the group consisting of triethylamine, dimethyl benzyl amine or triethylene diamine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |