US4374959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Block copolymers of polyphenylene oxides and non-sterically-hindered high molecular weight aromatic polycarbonates
Assignee: General Electric Co
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Filing: 1981-10-08
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Granted: 1983-02-22
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Expires: 2001-10-08
Abstract
Abstract This invention relates to block copolymers of polyphenylene oxides and non-sterically-hindered high molecular weight aromatic polycarbonates. These block copolymers can be molded, calendered, or extruded as films, sheets, fibers, laminates or other useful articles of manufacture.
Inventors
- 👤 George R. Loucks
- 👤 John R. Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:28
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/18; C08G64/183; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
119 words
A process of forming a block copolymer of polyphenylene oxide and an non-sterically-hindered high molecular weight aromatic polycarbonate comprising the following process sequence: (1) Forming an agitated two-phase mixture comprising, (i) an organic phase containing a polyphenylene oxide, an nonsterically hindered-aromatic dihydroxy compound, an inert organic solvent, a tertiary amine, and, optionally, a sterically hindered-aromatic dihydroxy compound, (ii) an aqueous phase containing a solution of an alkali metal hydroxide having a pH value of at least 11, (2) Adding and reacting a carbonyl halide with both the polyphenylene oxide and the nonsterically hindered-aromatic dihydroxy compound plus any, optional sterically hindered-aromatic dihydroxy compound, to form a block copolymer and (3) Recovering the polyphenylene oxide and nonsterically hindered-aromatic polycarbonate block copolymer.
Claim 2
Dependent Claim
119 words
A process of forming a block copolymer of polyphenylene oxide and an non-sterically-hindered high molecular weight aromatic polycarbonate comprising the following process sequence: (1) Forming an agitated two-phase mixture comprising, (i) an organic phase containing a polyphenylene oxide, an nonsterically hindered-aromatic dihydroxy compound, an inert organic solvent, a tertiary amine, and, optionally, a sterically hindered-aromatic dihydroxy compound, (ii) an aqueous phase containing a solution of an alkali metal hydroxide having a pH value of at least 11, (2) Adding and reacting a carbonyl halide with both the polyphenylene oxide and the nonsterically hindered-aromatic dihydroxy compound plus any, optional sterically hindered-aromatic dihydroxy compound, to form a block copolymer and (3) Recovering the polyphenylene oxide and nonsterically hindered-aromatic polycarbonate block copolymer.
Claim 3
Dependent Claim
27 words
The claim process 1 wherein the nonsterically hindered-aromatic dihydroxy compound is present as a major portion relative to a minor portion of a sterically hindered-aromatic dihydroxy compound.
Claim 4
Dependent Claim
30 words
The claim 2 process wherein the nonsterically hindered-aromatic dihydroxy compound portion is present in an amount at least equal to 90 mol percent relative to a sterically hindered-aromatic dihydroxy compound.
Claim 5
Dependent Claim
19 words
The claim 3 process wherein the polyphenylene oxide is poly(2,6-dimethyl-1,4-phenylene oxide) and the nonsterically hindered-aromatic dihydroxy compound is bis(4-hydroxyphenyl)-propane-2,2.
Claim 6
Dependent Claim
18 words
The claim 4 process wherein the alkali metal hydroxide is sodium hydroxide and the tertiary amine is triethylamine.
Claim 7
Dependent Claim
11 words
The claim 5 process wherein a phase transfer agent is present.
References Cited (Backward Citations)
US3342892A
Cited
US3875256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |