US4468503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amino ketone 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 haloacylated polyphenylene oxide and ammonia. The polyphenylene oxide chains are cross-linked by amino ketone bonding. Such cross-linked polymers are useful as membranes, for instance gas separation membranes.
Inventors
- 👤 Anthony Zampini
- 👤 Raymond F. Malon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:50
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
41 words
A cross-linked phenylene oxide polymer composition comprising the reaction product of a haloacylated phenylene oxide polymer and ammonia, wherein there is amino ketone cross-linkage between phenylene groups represented by the structural formula --COCHRNHCHRCO--, where R is hydrogen, methyl, ethyl or propyl.
Claim 2
Dependent Claim
41 words
A cross-linked phenylene oxide polymer composition comprising the reaction product of a haloacylated phenylene oxide polymer and ammonia, wherein there is amino ketone cross-linkage between phenylene groups represented by the structural formula --COCHRNHCHRCO--, where R is hydrogen, methyl, ethyl or propyl.
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
13 words
The composition of claim 2 wherein the phenylene oxide has two methyl groups.
Claim 5
Dependent Claim
14 words
The composition of claim 3 wherein the haloacyl group comprises haloacetyl, halopropionyl or halobutyryl.
Claim 6
Dependent Claim
20 words
The composition of claim 4 wherein the haloacyl groups have halogen selected from the group consisting of chlorine or bromine.
Claim 7
Dependent Claim
53 words
A cross-linked phenylene oxide polymer composition comprising the reaction product of haloacylated poly(2,6-dimethyl-1,4-phenylene oxide) and ammonia wherein there are from 0.1 to 1.0 acyl halogen atoms per phenylene oxide unit, wherein there is amino ketone cross-linkage between phenylene groups represented by the structural formula --COCHRNHCHRCO--, where R is hydrogen, methyl, ethyl or propyl.
Claim 8
Dependent Claim
53 words
A cross-linked phenylene oxide polymer composition comprising the reaction product of haloacylated poly(2,6-dimethyl-1,4-phenylene oxide) and ammonia wherein there are from 0.1 to 1.0 acyl halogen atoms per phenylene oxide unit, wherein there is amino ketone cross-linkage between phenylene groups represented by the structural formula --COCHRNHCHRCO--, where R is hydrogen, methyl, ethyl or propyl.
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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 |