US4245058A
Expired / Lapsed
US
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Polycarbonate compositions
Assignee: General Electric Co
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Filing: 1979-08-27
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Granted: 1981-01-13
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Expires: 1999-08-27
Abstract
Abstract The present invention is concerned with ternary polycarbonate compositions having improved impact strength. The ternary compositions comprise a mixture of thermoplastic, aromatic polycarbonates which are derived from aromatic dihydroxy compounds, an acrylate copolymer and a polyolefin.
Inventors
- 👤 Ping Y. Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:20
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/08; H01J23/087; C; C08; C08L; C08L69/00; H01F; H01F7/00; H01F7/02; H01F7/0273; H01F7/0278
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
76 words
A ternary polycarbonate composition comprising in admixture, a high molecular weight aromatic polycarbonate which is based on a dihydric phenol, from about 2 to about 6 parts by weight per hundred parts of aromatic polycarbonate of an acrylate copolymer, which is a copolymer of a C 1 -C 5 acrylate and a C 1 -C 5 methacrylate, and from about 0.5 to about 4 parts by weight per hundred parts of aromatic polycarbonate of a polyolefin.
Claim 2
Dependent Claim
76 words
A ternary polycarbonate composition comprising in admixture, a high molecular weight aromatic polycarbonate which is based on a dihydric phenol, from about 2 to about 6 parts by weight per hundred parts of aromatic polycarbonate of an acrylate copolymer, which is a copolymer of a C 1 -C 5 acrylate and a C 1 -C 5 methacrylate, and from about 0.5 to about 4 parts by weight per hundred parts of aromatic polycarbonate of a polyolefin.
Claim 3
Dependent Claim
30 words
The composition of claim 1 wherein the acrylate copolymer is present in an amount of from about 3 to about 5 parts by weight per hundred parts of aromatic polycarbonate.
Claim 4
Dependent Claim
29 words
The composition of claim 1 wherein the polyolefin is present in an amount of from about 1 to about 3 parts by weight per hundred parts of aromatic polycarbonate.
Claim 5
Dependent Claim
66 words
The composition of claim 1 wherein the polyolefin is selected from the group consisting of polyethylene and polypropylene and, in the acrylate copolymer, the methacrylate is selected from the group consisting of methyl methacrylate, 1,3-butylene dimethacrylate, isobutyl methacrylate, butyl methacrylate and ethyl methacrylate and the acrylate is selected from the group consisting of 1,4-butanediol diacrylate, isobutyl acrylate, methyl acrylate, ethyl acrylate, n-butyl acrylate and 1,3-butylene diacrylate.
Claim 6
Dependent Claim
13 words
The composition of claim 4 wherein the aromatic polycarbonate is derived from 2,2-bis(4-hydroxyphenyl)propane.
Claim 7
Dependent Claim
21 words
The composition of claim 5 wherein, in the acrylate copolymer, the methacrylate is methyl methacrylate and the acrylate is n-butyl acrylate.
Claim 8
Dependent Claim
26 words
The composition of claim 6 wherein, in the acrylate copolymer, the weight ratio of methyl methacrylate to n-butyl acrylate ranges from about 1/2 to about 2/1.
Claim 9
Dependent Claim
77 words
A ternary polycarbonate composition comprising in admixture a high molecular weight aromatic polycarbonate which is derived from 2,2-bis(4-hydroxyphenyl)propane and from about 1 to about 3 parts by weight, per hundred parts of said aromatic polycarbonate, of a polyolefin and from about 3 to about 5 parts by weight, per hundred parts of said aromatic polycarbonate, of a copolymer of methyl methacrylate and n-butyl acrylate, wherein the weight ratio of n-butyl acrylate to methyl methacrylate is about 3/2.
Claim 10
Dependent Claim
77 words
A ternary polycarbonate composition comprising in admixture a high molecular weight aromatic polycarbonate which is derived from 2,2-bis(4-hydroxyphenyl)propane and from about 1 to about 3 parts by weight, per hundred parts of said aromatic polycarbonate, of a polyolefin and from about 3 to about 5 parts by weight, per hundred parts of said aromatic polycarbonate, of a copolymer of methyl methacrylate and n-butyl acrylate, wherein the weight ratio of n-butyl acrylate to methyl methacrylate is about 3/2.
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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) | 1984-01-13 | 1984-07-14 | 1985-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-13 | 1988-07-14 | 1989-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-13 | 1992-07-14 | 1993-01-13 | $7700.00 | Window Closed / Lapsed |