Patent US4456725A successfully refreshed from Google Patents.
US4456725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions comprising polycarbonates, acrylate resins, and aliphatic hydrocarbons
Assignee: General Electric Co
•
Filing: 1982-12-20
•
Granted: 1984-06-26
•
Expires: 2002-12-20
Abstract
Abstract A composition of an aromatic of an aromatic carbon polymer, an acrylate impact modifier and an aliphatic hydrocarbon low temperature impact modifier.
Inventors
- 👤 Ping Y. Liu
- 👤 Niles R. Rosenquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:41
CPC Classifications
C; C08; C08L; C08L69/00; C08K; C08K5/00; C08K5/01; C08L69/005
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
90 words
A composition which consists essentially in admixture a. a major amount of aromatic carbonate polymer; b. a minor amount of a rubber-elastic graft copolymer acrylate resin having a glass transition temperature below about -20° C., which is sufficient to impact modify the aromatic carbonate polymer; c. a minor amount of an aliphatic hydrocarbon of molecular weight less than about 1,000 which is sufficient to impact modify the composition of a and b at low temperatures, the quantity of a above about 90 weight percent of components a, b and c.
Claim 2
Dependent Claim
90 words
A composition which consists essentially in admixture a. a major amount of aromatic carbonate polymer; b. a minor amount of a rubber-elastic graft copolymer acrylate resin having a glass transition temperature below about -20° C., which is sufficient to impact modify the aromatic carbonate polymer; c. a minor amount of an aliphatic hydrocarbon of molecular weight less than about 1,000 which is sufficient to impact modify the composition of a and b at low temperatures, the quantity of a above about 90 weight percent of components a, b and c.
Claim 3
Dependent Claim
17 words
The composition in accordance with claim 1 wherein the aromatic carbonate polymer is derived from bisphenol A.
Claim 4
Dependent Claim
13 words
The composition in accordance with claim 1 wherein the acrylate comprises n-butyl acrylate.
Claim 5
Dependent Claim
24 words
The composition in accordance with claim 1 wherein the acrylate is a multiphase composite interpolymer comprised of C 1-5 acrylate and C 1-5 methacrylate.
Claim 6
Dependent Claim
18 words
The composition in accordance with claim 1 wherein the aliphatic hydrocarbon is an alkane or blend of alkanes.
Claim 7
Dependent Claim
36 words
The composition in accordance with claim 2 wherein the acrylate is a multiphase composite interpolymer comprising a C 1-5 acrylate and a C 1-5 methacrylate and the aliphatic hydrocarbon is an alkane or blend of alkanes.
Claim 8
Dependent Claim
25 words
The composition in accordance with claim 2 wherein the aliphatic hydrocarbon is from about 0.5 to about 5.0 weight percent of a, b and c.
Claim 9
Dependent Claim
42 words
The composition in accordance with claim 6 wherein the aromatic carbonate polymer is above about 90 weight percent, the acrylate is from about 2.5 to about 6.0 weight percent and the aliphatic hydrocarbon is from about 0.5 to about 2.0 weight percent.
Claim 10
Dependent Claim
18 words
The composition in accordance with claim 6 wherein the aromatic carbonate polymer is above about 94 weight percent.
Claim 11
Dependent Claim
21 words
The composition in accordance with claim 2 wherein the quantity of b and c together is above about 4.0 weight percent.
Claim 12
Dependent Claim
21 words
The composition in accordance with claim 9 wherein the quantity of b anc c together is above about 4.0 weight percent.
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) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |