Patent US3875256A successfully refreshed from Google Patents.
US3875256A
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Bis(polyphenylene)-carbonate block copolymers
Assignee: General Electric Co
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Filing: 1973-07-30
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Granted: 1975-04-01
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Expires: 1993-07-30
Abstract
Abstract The invention relates to block copolymers of the A-B-A type where each A is the phenoxy residue of a poly(2,6-disubstituted1,4-phenylene oxide) having one terminal hydroxyl per polymer molecule and B is the residue of a carbonate precursor having two groups which are reactive with the hydroxyl group of said poly(phenylene oxide). These compositions are useful in producing molded articles, films, fibers, etc., having modified properties compared to the parent poly(phenylene oxides).
Inventors
- 👤 Dwain M White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:38
CPC Classifications
C; C08; C08L; C08L67/00; C08G; C08G63/00; C08G63/66; C08G63/668; C08G64/00; C08G64/04; C08G64/06; C08G64/18; C08G64/183; C08G64/20; C08G64/22; C08G64/24; C08G64/26; C08G65/00; C08G65/34; C08G65/48; C08G65/485; C08G81/00; C08L69/00; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
6 words
A BLOCK COPOLYMER HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
A BLOCK COPOLYMER HAVING THE FORMULA
Claim 3
Dependent Claim
11 words
The block copolymer of claim 1 which is a bis(polyphenylene oxide)carbonate.
Claim 4
Dependent Claim
18 words
The block copolymer of claim 1 wherein the carbonate moiety is the dicarbonate or polymeric carbonate of 4,4''-isopropylidenediphenol.
Claim 5
Dependent Claim
18 words
The block copolymer of claim 1 wherein the carbonate moiety is a polymeric carbonate of a dihydroxy compound.
Claim 6
Dependent Claim
25 words
The block copolymer of claim 4 wherein the dihydroxy compound is a phenol having each of the two phenolic hydroxyl groups on separate benzene rings.
Claim 7
Dependent Claim
17 words
The block copolymer of claim 1 wherein the carbonate moiety is a dicarbonate of a dihydric phenol.
Claim 8
Dependent Claim
14 words
The block copolymer of claim 1 wherein the poly(phenylene oxide) moiety is poly(2,6-dimethyl-1,4-phenylene oxide).
Claim 9
Dependent Claim
11 words
The block copolymer of claim 7 which is bis-(poly(2,6-dimethyl-1,4-phenylene oxide)) carbonate.
Claim 10
Dependent Claim
15 words
The block copolymer of claim 7 wherein the carbonate moiety is the dicarbonate of 4,4''-isopropylidenediphenol.
Claim 11
Dependent Claim
16 words
The block copolymer of claim 7 wherein the carbonate moiety is a polymeric carbonate Of 4,4''-isopropylidenediphenol.
Claim 12
Dependent Claim
20 words
The process of making the block copolymers of claim 1 which comprises reacting: a. a polyphenylene oxide having the formula
Claim 13
Dependent Claim
39 words
The block copolymer of claim 1 wherein R'' is C2-8 alkylene, phenylene, biphenylene or the aforementioned groups containing a phenylene or biphenylene group wherein one up to the total number of aromatic hydrogens have been replaced by C1-8 groups.
Claim 14
Dependent Claim
17 words
The block copolymer of claim 1 wherein n is in the range of from 0 to 1.
Claim 15
Dependent Claim
10 words
The block copolymer of claim 1 wherein n is 0.
Claim 16
Dependent Claim
17 words
The block copolymer of claim 1 wherein n is in the range of from 75 to 100.
Claim 17
Dependent Claim
16 words
The block copolymer of claim 15 wherein n is in the range of 75 to 85.
Claim 18
Dependent Claim
14 words
The block copolymer of claim 1 wherein the poly(phenylene oxide) moiety is poly(2,6-diphenyl-1,4-phenylene oxide).
Claim 19
Dependent Claim
33 words
The block copolymer of claim 1 wherein the poly(phenylene oxide) moiety is prepared by the process of forming self-condensation products of phenols which comprises reacting oxygen with a phenol having the structural formula
Claim 20
Dependent Claim
13 words
The block copolymer of claim 18 wherein the amine is a tertiary amine.
Claim 21
Dependent Claim
48 words
The block copolymer of claim 18 wherein the amine is selected from the group consisting of monoamines, diamines and triamines whose amine nitrogen atoms are directly bonded to an aliphatic carbon atom and at least one of said nitrogen atoms has at least one directly bonded hydrogen atom.
References Cited (Backward Citations)
US3342892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |