US4335032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate resin impact modified with polyolefins and containing polyorganosiloxane fluids
Assignee: General Electric Co
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Filing: 1980-12-31
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Granted: 1982-06-15
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Expires: 2000-12-31
Abstract
Abstract A polycarbonate composition having improved melt flow and improved impact strength after aging at elevated temperatures comprising polycarbonate resin with polyolefins and a polyorganosiloxane. A preferred composition comprises in admixture a high molecular weight aromatic carbonate polymer and a minor amount of a polyolefin and a polydimethylsiloxane fluid.
Inventors
- 👤 Niles R. Rosenquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:13
CPC Classifications
C; C08; C08L; C08L69/00; C08L69/005
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
A polycarbonate composition comprising in admixture a high molecular weight aromatic carbonate polymer and a minor amount of a polyolefin and a polyorganosiloxane of the following formula: ##STR2## wherein R 1 is a radical selected from the group consisting of alkyl, haloalkyl, aryl, aralkyl, alkaryl, alkoxy, aryloxy, and halogenated derivatives of the aforesaid aryl, aralkyl, alkaryl, alkoxy or aryloxy radicals; R 2 and R 3 are radicals selected from the group consisting of straight chain or branched lower alkyl radicals containing from 1 to about 10 carbon atoms and phenyl radicals; and m is an integer of such value that the polyorganosiloxane is a fluid at ambient temperatures.
Claim 2
Dependent Claim
108 words
A polycarbonate composition comprising in admixture a high molecular weight aromatic carbonate polymer and a minor amount of a polyolefin and a polyorganosiloxane of the following formula: ##STR2## wherein R 1 is a radical selected from the group consisting of alkyl, haloalkyl, aryl, aralkyl, alkaryl, alkoxy, aryloxy, and halogenated derivatives of the aforesaid aryl, aralkyl, alkaryl, alkoxy or aryloxy radicals; R 2 and R 3 are radicals selected from the group consisting of straight chain or branched lower alkyl radicals containing from 1 to about 10 carbon atoms and phenyl radicals; and m is an integer of such value that the polyorganosiloxane is a fluid at ambient temperatures.
Claim 3
Dependent Claim
14 words
The composition of claim 1, wherein said aromatic carbonate polymer is derived from bisphenol-A.
Claim 4
Dependent Claim
25 words
The composition of claim 1, wherein the polyorganosiloxane is selected from the group consisting of polyorganosiloxane consisting of polymethylalkylsiloxane, polymethylphenylsiloxane, polydimethylsiloxane, polydiphenylsiloxane and copolymers thereof.
Claim 5
Dependent Claim
16 words
The composition of claim 1, wherein R 1 , R 2 and R 3 are methyl.
Claim 6
Dependent Claim
24 words
The composition of claim 1, wherein the polyolefin is selected from the group consisting of polyethylene, polypropylene, polyisobutylene, ethylenepropylene, diene copolymer, copolymers and terpolymers.
Claim 7
Dependent Claim
21 words
The composition of claim 1, comprising from about 0.1 to about 10.0 parts polyorganosiloxane per hundred parts of aromatic carbonate polymer.
Claim 8
Dependent Claim
21 words
The composition of claim 1, comprising from about 0.2 to about 2.0 parts polyorganosiloxane per hundred parts of aromatic carbonate polymer.
Claim 9
Dependent Claim
21 words
The composition of claim 1, comprising from about 0.5 to about 10.0 parts polyolefin per hundred parts of aromatic carbonate polymer.
Claim 10
Dependent Claim
22 words
The composition of claim 1, comprising from about 2.0 parts to about 7.0 parts polyolefin per hundred parts of aromatic carbonate polymer.
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) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |