Patent US4073769A successfully refreshed from Google Patents.
US4073769A
Expired / Lapsed
US
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Esters of phosphorous acid
Assignee: Bayer AG
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Filing: 1975-11-25
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Granted: 1978-02-14
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Expires: 1995-11-25
Abstract
Abstract Phosphites of the general formula: ##STR1## in which N 1 IS AN INTEGER; n 2 is 0 or an integer; n 3 is an integer; At least one of the groups R is an oxetane group as hereinafter defined or a hydrocarbon radical being substituted at least by one oxetane group as hereinafter defined; The remaining groups R are selected from alkyl, aralkyl, cycloalkyl, aryl and hetaryl groups; and The group or groups Ar are the same or different at-least-divalent aromatic groups the free valencies of which are directly linked to the aromatic nuclei; And a process for their preparation.
Inventors
- 👤 Erich Eimers
- 👤 Dieter Margotte
- 👤 Helmut Schmid
- 👤 Rolf Dhein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:36
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/655; C07F9/6551; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/529
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
113 words
A plastics material comprising an aromatic polycarbonate and 0.01 to 0.2 weight %, based on the weight of the aromatic polycarbonate and the phosphite, of a phosphite of the formula ##STR17## wherein n 1 is an integer; n 2 is 0 or an integer; n 3 is an integer; at least one of the groups R is an oxetane group or a hydrocarbon radical being substituted by at least one oxetane group; the remaining groups R are identical or different and are selected from alkyl, aralkyl, cycloalkyl, aryl and hetaryl groups; and Ar are the same or different at-least-divalent aromatic groups, the free valences of which are directly linked to the aromatic nuclei.
Claim 2
Dependent Claim
113 words
A plastics material comprising an aromatic polycarbonate and 0.01 to 0.2 weight %, based on the weight of the aromatic polycarbonate and the phosphite, of a phosphite of the formula ##STR17## wherein n 1 is an integer; n 2 is 0 or an integer; n 3 is an integer; at least one of the groups R is an oxetane group or a hydrocarbon radical being substituted by at least one oxetane group; the remaining groups R are identical or different and are selected from alkyl, aralkyl, cycloalkyl, aryl and hetaryl groups; and Ar are the same or different at-least-divalent aromatic groups, the free valences of which are directly linked to the aromatic nuclei.
Claim 3
Dependent Claim
30 words
The plastics material of claim 1 wherein the phosphite is present in an amount of from 0.025 to 0.1 weight % based on the weight of the polycarbonate and phosphite.
Claim 4
Dependent Claim
18 words
The plastics material of claim 1 wherein the polycarbonate has a molecular weight of from 20,000 to 40,000.
Claim 5
Dependent Claim
20 words
The plastics material of claim 1 wherein the polycarbonate is based on bis-(3-hydroxy-phenyl)-propane-2,2; bis-(4-hydroxy-3,5-dichloro-phenyl)-propane-2,2; bis-(4-hydroxy-3,5-dibromophenyl)-propane-2,2; bis-(4-hydroxy-3,5-dimethyl-phenyl)-propane-2,2; bis-(4-hydroxy-3-methyl-phenyl)-propane-2,2; bis-(4-hydroxy-phenyl)-cyclohexane-1,1 or α,α'-bis-(4-hydroxyphenyl)-p-diisopropyl-benzene.
Claim 6
Dependent Claim
22 words
The plastics material of claim 1 which also includes a carbonate selected from the group consisting of barium, strontium and calcium carbonates.
Claim 7
Dependent Claim
192 words
A plastics material comprising an aromatic polycarbonate and 0.01 to 0.2 weight %, based on the weight of the aromatic polycarbonate and the phosphite, of a phosphite of the formula ##STR18## wherein n 1 is an integer 1 to 4 inclusive; n 2 is 0, 1 or 2; n 3 is an integer 1 to 4 inclusive; at least one of the groups R is an oxetane group of the formula ##STR19## in which Z is H, a C 1 -C 16 -alkyl, C 1 -C 4 -alkoxy, C 7 -C 10 -aralkyl, alkoxyalkyl having 2-18 carbon atoms or aryloxyalkyl having 7-16 carbon atoms, or a C 1 -C 18 alkyl radical being substituted at least by one oxetane group of the formula ##STR20## in which Z is a hydrogen, C 1 -C 16 -alkyl, C 1 -C 4 -alkoxy, C 7 -C 10 -aralkyl, alkoxyalkyl having 2-18 carbon atoms, or aryloxyalkyl having 7-16 carbon atoms; the remaining groups R are selected from alkyl, aralkyl, cycloalkyl, aryl and hetaryl groups; and Ar are the same or different at-least-divalent aromatic groups, the free valences of which are directly linked to the aromatic nuclei.
Claim 8
Dependent Claim
192 words
A plastics material comprising an aromatic polycarbonate and 0.01 to 0.2 weight %, based on the weight of the aromatic polycarbonate and the phosphite, of a phosphite of the formula ##STR18## wherein n 1 is an integer 1 to 4 inclusive; n 2 is 0, 1 or 2; n 3 is an integer 1 to 4 inclusive; at least one of the groups R is an oxetane group of the formula ##STR19## in which Z is H, a C 1 -C 16 -alkyl, C 1 -C 4 -alkoxy, C 7 -C 10 -aralkyl, alkoxyalkyl having 2-18 carbon atoms or aryloxyalkyl having 7-16 carbon atoms, or a C 1 -C 18 alkyl radical being substituted at least by one oxetane group of the formula ##STR20## in which Z is a hydrogen, C 1 -C 16 -alkyl, C 1 -C 4 -alkoxy, C 7 -C 10 -aralkyl, alkoxyalkyl having 2-18 carbon atoms, or aryloxyalkyl having 7-16 carbon atoms; the remaining groups R are selected from alkyl, aralkyl, cycloalkyl, aryl and hetaryl groups; and Ar are the same or different at-least-divalent aromatic groups, the free valences of which are directly linked to the aromatic nuclei.
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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |