Patent US4340683A successfully refreshed from Google Patents.
US4340683A
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Polycarbonate compositions
Assignee: General Electric Co
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Filing: 1980-03-03
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Granted: 1982-07-20
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Expires: 2000-03-03
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 and its oxide.
Inventors
- 👤 Ping Y. Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:05
CPC Classifications
C; C08; C08L; C08L69/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
52 words
A ternary polycarbonate composition comprising in admixture, a high molecular weight aromatic polycarbonate which is based on a dihydric phenol, a minor amount of an acrylate copolymer, which is a copolymer of a C 1 -C 5 acrylate and a C 1 -C 5 methacrylate, and a minor amount of polyethylene oxide.
Claim 2
Dependent Claim
52 words
A ternary polycarbonate composition comprising in admixture, a high molecular weight aromatic polycarbonate which is based on a dihydric phenol, a minor amount of an acrylate copolymer, which is a copolymer of a C 1 -C 5 acrylate and a C 1 -C 5 methacrylate, and a minor amount of polyethylene oxide.
Claim 3
Dependent Claim
53 words
The composition of claim 1 wherein, 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 4
Dependent Claim
13 words
The composition of claim 2 wherein the aromatic polycarbonate is derived from 2,2-bis(4-hydroxyphenyl)propane.
Claim 5
Dependent Claim
21 words
The composition of claim 3 wherein, in the acrylate copolymer, the methacrylate is methyl methacrylate and the acrylate is n-butyl acrylate.
Claim 6
Dependent Claim
26 words
The composition of claim 4 wherein, in the acrylate copolymer, the weight ratio of methyl methacrylate to n-butyl acrylate ranges from about 1/2 to about 2/1.
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) | 1985-07-19 | 1986-01-18 | 1986-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-19 | 1990-01-18 | 1990-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-19 | 1994-01-18 | 1994-07-20 | $7700.00 | Window Closed / Lapsed |