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US4468501A
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US
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Cross-linked polyphenylene oxide
Assignee: Permea Inc
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Filing: 1983-06-30
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Granted: 1984-08-28
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Expires: 2003-06-30
Abstract
Abstract Cross-linked polyphenylene oxide compositions comprise the reaction product of an alkyl halogenated phenylene oxide polymer and ammonia. The cross-linkage between phenylene groups is benzyl amine linkage represented by the structural formula --CH 2 NHCH 2 --. The cross-linked polyphenylene oxide is useful as a membrane.
Inventors
- 👤 Anthony Zampini
- 👤 Raymond F. Malon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:11
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/48; C08G65/485; B; B01; B01D; B01D71/00; B01D71/06; B01D71/52; B01D71/522; B01D71/5223
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
38 words
A cross-linked phenylene oxide polymer composition comprising the reaction product of an alkyl halogenated phenylene oxide polymer and ammonia, wherein cross-linkage between phenylene groups is represented by the structural formula --CHRNHCHR--, where R is hydrogen or an alkyl.
Claim 2
Dependent Claim
38 words
A cross-linked phenylene oxide polymer composition comprising the reaction product of an alkyl halogenated phenylene oxide polymer and ammonia, wherein cross-linkage between phenylene groups is represented by the structural formula --CHRNHCHR--, where R is hydrogen or an alkyl.
Claim 3
Dependent Claim
43 words
The composition of claim 1 wherein the phenylene oxide polymer has at least one alkyl group having 1 to 3 carbon atoms, said alkyl groups being in an ortho position on the phenylene ring with respect to the oxygen of the phenylene oxide.
Claim 4
Dependent Claim
19 words
The composition of claim 2 wherein said at least one alkyl group is halogenated at the benzylic carbon atom.
Claim 5
Dependent Claim
13 words
The composition of claim 3 wherein the phenylene oxide has two methyl groups.
Claim 6
Dependent Claim
15 words
The composition of claim 4 wherein the methyl groups are halogenated with chlorine or bromine.
Claim 7
Dependent Claim
48 words
A cross-linked phenylene oxide polymer composition comprising the reaction product of brominated poly(2,6-dimethyl-1,4-phenylene oxide) and ammonia wherein there are from 0.1 to 2.0 benzylic bromine atoms per phenylene oxide unit, wherein thereis benzyl amine cross-linkage between phenylene groups represented by the structural formula --CH 2 NHCH 2 --.
Claim 8
Dependent Claim
48 words
A cross-linked phenylene oxide polymer composition comprising the reaction product of brominated poly(2,6-dimethyl-1,4-phenylene oxide) and ammonia wherein there are from 0.1 to 2.0 benzylic bromine atoms per phenylene oxide unit, wherein thereis benzyl amine cross-linkage between phenylene groups represented by the structural formula --CH 2 NHCH 2 --.
References Cited (Backward Citations)
US3306875A
Cited
US3306874A
Cited
US3337499A
Cited
US3262892A
Cited
US3330806A
Cited
US3334069A
Cited
US3375298A
Cited
US3406147A
Cited
US3396146A
Cited
US3630900A
Cited
US3729433A
Cited
US3780496A
Cited
US3875114A
Cited
US4230463A
Cited
US4321331A
Cited
EP0031730A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |