US4251425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate resin composition
Assignee: Teijin Ltd
•
Filing: 1978-12-12
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Granted: 1981-02-17
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Expires: 1998-12-12
Abstract
Abstract A stabilized polycarbonate resin composition comprising a polycarbonate resin and a benzenephosphonate of the general formula ##STR1## wherein R 1 and R 2 , independently from each other, are selected from the class consisting of hydrogen, alkyl groups having 1 to 22 carbon atoms and cycloalkyl groups having 5 to 10 carbon atoms, at least one of R 1 and R 2 being other than hydrogen. A stabilized colored polycarbonate resin composition is also provided by further incorporating a pigment and/or dye.
Inventors
- 👤 Osamu Ohara
- 👤 Kazuo Takiguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:24
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
52 words
A stabilized polycarbonate resin composition comprising a polycarbonate resin and a benzenephosphonate of the general formula ##STR5## wherein R 1 and R 2 , independently from each other, are selected from the class consisting of alkyl groups having 1 to 22 carbon atoms and cycloalkyl groups having 5 to 10 carbon atoms.
Claim 2
Dependent Claim
52 words
A stabilized polycarbonate resin composition comprising a polycarbonate resin and a benzenephosphonate of the general formula ##STR5## wherein R 1 and R 2 , independently from each other, are selected from the class consisting of alkyl groups having 1 to 22 carbon atoms and cycloalkyl groups having 5 to 10 carbon atoms.
Claim 3
Dependent Claim
26 words
The composition of claim 1 wherein the amount of benzenephosphonate is 0.005 to 0.5 part by weight per 100 parts by weight of the polycarbonate resin.
Claim 4
Dependent Claim
12 words
The composition of claim 1 wherein the benzenephosphonate is a dialkyl benzenephosphonate.
Claim 5
Dependent Claim
57 words
A stabilized colored polycarbonate resin composition comprising a polycarbonate resin, a pigment and/or dye, and a benzenephosphonate of the general formula ##STR6## wherein R 1 and R 2 , independently from each other, are selected from the class consisting of alkyl groups having 1 to 22 carbon atoms and cycloalkyl groups having 5 to 10 carbon atoms.
Claim 6
Dependent Claim
57 words
A stabilized colored polycarbonate resin composition comprising a polycarbonate resin, a pigment and/or dye, and a benzenephosphonate of the general formula ##STR6## wherein R 1 and R 2 , independently from each other, are selected from the class consisting of alkyl groups having 1 to 22 carbon atoms and cycloalkyl groups having 5 to 10 carbon atoms.
Claim 7
Dependent Claim
43 words
The composition of claim 4 wherein the amount of the pigment and/or dye is 0.001 to 5.0 parts by weight, and the amount of the benzenephosphonate is 0.005 to 0.5 parts by weight, both per 100 parts by weight of the polycarbonate resin.
Claim 8
Dependent Claim
14 words
The composition of claim 4 or 5 wherein the benzenephosphonate is a dialkyl benzenephosphonate.
Claim 9
Dependent Claim
18 words
The composition of one of claims 4 or 5 wherein the pigment is titanium dioxide or cadmium yellow.
Claim 10
Dependent Claim
83 words
The composition of one of claims 4 or 5 which further contains an organic phosphite of the general formula ##STR7## wherein R 1 , R 2 and R 3 , independently from each other, are selected from the class consisting of hydrogen, alkyl groups having 1 to 22 carbon atoms, cycloalkyl groups having 5 to 10 carbon atoms, aryl groups having 6 to 12 carbon atoms, aralkyl groups having 7 to 24 carbon atoms and alkylaryl groups having 7 to 24 carbon atoms.
Claim 11
Dependent Claim
28 words
The composition of claim 8 wherein the amount of the organic phosphite is 0.001 to 0.2 part by weight per 100 parts by weight of the polycarbonate resin.
Claim 12
Dependent Claim
14 words
The composition of claim 6 wherein the pigment is titanium dioxide or cadmium yellow.
Claim 13
Dependent Claim
12 words
The composition of claim 9 wherein the benzenephosphonate is a dialkyl benzenephosphonate.
Claim 14
Dependent Claim
14 words
The composition of claim 1 wherein the benzenephosphonate is dimethyl benzenephosphonate or diethyl benzenephosphonate.
Claim 15
Dependent Claim
23 words
The composition of claim 1 wherein the alkyl group is ethyl, butyl, octyl or dodecyl and the cycloalkyl group is cyclopentyl or cyclohexyl.
Claim 16
Dependent Claim
14 words
The composition of claim 4 wherein the benzenephosphonate is dimethyl benzenephosphonate or diethyl benzenephosphonate.
Claim 17
Dependent Claim
23 words
The composition of claim 4 wherein the alkyl group is ethyl, butyl, octyl or dodecyl and the cycloalkyl group is cyclopentyl or cyclohexyl.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |