US4507462A
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Low molecular weight aromatic polymers with biphenylene end groups
Assignee: POLYMER SCIENCE
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Filing: 1981-08-03
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Granted: 1985-03-26
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Expires: 2001-08-03
Abstract
Abstract Biphenylene end-capped low molecular weight thermally stable aromatic polymers and the process for their preparation. The invention is further directed to crosslinked biphenylene end-capped aromatic polymers and to the process for their preparation. The process for preparing the biphenylene end-capped low molecular weight thermally stable aromatic polymers comprises carrying out a misbalanced polymerization reaction of a suitable aromatic aminoketone compound and a suitable aromatic ketomethylene compound and thereafter adding a monofunctional biphenylene compound.
Inventors
- 👤 John K. Stille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:01
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/48; C08G63/00; C08G63/68; C08G63/685; C08G63/91; C08G73/00; C08G73/06; C08G73/0683; C08G73/0688; C08G73/18; C08G85/00; C08G85/004
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
54 words
A process for preparing biphenylene end-capped low molecular weight thermally stable aromatic polyquinoline polymers which comprises carrying out a misbalanced polymerization reaction of a suitable aromatic aminoketone and a suitable aromatic ketomethylene compound, wherein there is a molar excess of the aminoketone as compared to ketomethylene compound, and thereafter adding a monofunctional biphenylene compound.
Claim 2
Dependent Claim
54 words
A process for preparing biphenylene end-capped low molecular weight thermally stable aromatic polyquinoline polymers which comprises carrying out a misbalanced polymerization reaction of a suitable aromatic aminoketone and a suitable aromatic ketomethylene compound, wherein there is a molar excess of the aminoketone as compared to ketomethylene compound, and thereafter adding a monofunctional biphenylene compound.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the aromatic aminoketone compound is 4,4'-oxy-bis(2-benzoyl-benzenamine) and the aromatic ketomethylene compound is 4,4'-oxy-bis(acetophenone).
Claim 4
Dependent Claim
42 words
The process of claims 1 or 2 wherein the end-capped low molecular weight polymer is a polyquinoline of the formula: ##STR6## wherein X in an integer such that the molecular weight of the biphenylene capped polymer is between about 5,000 and 15,000.
Claim 5
Dependent Claim
26 words
The process of claim 1 wherein the monofunctional biphenylene compound is selected from the group of biphenylene-2-carboxylic acid (and the corresponding acid chloride), 2-aminobiphenylene, and 2-biphenyleneglyoxal.
Claim 6
Dependent Claim
17 words
The process of claim 1 wherein the molecular weight of the polymer is below about 15,000 Mn.
Claim 7
Dependent Claim
13 words
The process of claim 1 which comprises further adding a transition metal catalyst.
Claim 8
Dependent Claim
20 words
The process of claim 6 wherein the transition metal catalyst is a rhodium (I) catalyst or a nickel (O) catalyst.
Claim 9
Dependent Claim
15 words
The process of claim 7 wherein the rhodium (I) catalyst is a norbornadieneclororhodium (I) dimer.
Claim 10
Dependent Claim
28 words
A biphenylene end-capped thermally stable low molecular weight aromatic polymer selected from the group of biphenylene end-capped polyquinolines, polyamides, polybenzimidazoles, polysulfones, poly(ketone ethers), poly(ketone ether sulfones) and polyesters.
Claim 11
Dependent Claim
28 words
A biphenylene end-capped thermally stable low molecular weight aromatic polymer selected from the group of biphenylene end-capped polyquinolines, polyamides, polybenzimidazoles, polysulfones, poly(ketone ethers), poly(ketone ether sulfones) and polyesters.
Claim 12
Dependent Claim
40 words
The process of claims 9 wherein the end-capped low molecular weight polymer is a polyquinoline of the formula: ##STR7## wherein X in an integer such that the molecular weight of the biphenylene capped polymer is between about 5,000 and 15,000.
Claim 13
Dependent Claim
14 words
The polymer of claim 9 wherein the molecular weight is below about 15,000 Mn.
Claim 14
Dependent Claim
14 words
The polymer of claim 9 wherein the molecular weight is above about 5,000 Mn.
Claim 15
Dependent Claim
56 words
A process for preparing crosslinked biphenylene end-capped aromatic polymers which comprises melt pressing a biphenylene end-capped low molecular weight aromatic polymer at a temperature above the glass transition temperature of the uncured polymer, and wherein the end-capped aromatic polymer is selected from the group of polyquinolines, polyamides, polybenzimidazoles, polysulfones, poly(ketone ethers), poly(ketone ether sulfones) and polyesters.
Claim 16
Dependent Claim
56 words
A process for preparing crosslinked biphenylene end-capped aromatic polymers which comprises melt pressing a biphenylene end-capped low molecular weight aromatic polymer at a temperature above the glass transition temperature of the uncured polymer, and wherein the end-capped aromatic polymer is selected from the group of polyquinolines, polyamides, polybenzimidazoles, polysulfones, poly(ketone ethers), poly(ketone ether sulfones) and polyesters.
Claim 17
Dependent Claim
68 words
A process for preparing crosslinked biphenylene end-capped aromatic polymers which comprises adding a suitable transition metal catalyst to the biphenylene end-capped low molecular weight aromatic polymer, and thereafter melt pressing the polymer at a temperature above about the glass transition temperatures of the uncured polymer, and wherein the end-capped aromatic polymer is selected from the group of polyquinolines, polyamides, polybenzimidazoles, polysulfones, poly(ketone ethers), poly(ketone ether sulfones) and polyesters.
Claim 18
Dependent Claim
68 words
A process for preparing crosslinked biphenylene end-capped aromatic polymers which comprises adding a suitable transition metal catalyst to the biphenylene end-capped low molecular weight aromatic polymer, and thereafter melt pressing the polymer at a temperature above about the glass transition temperatures of the uncured polymer, and wherein the end-capped aromatic polymer is selected from the group of polyquinolines, polyamides, polybenzimidazoles, polysulfones, poly(ketone ethers), poly(ketone ether sulfones) and polyesters.
Claim 19
Dependent Claim
42 words
The process of claims 13 or 14 wherein the end-capped low molecular weight polymer is a polyquinoline of the formula: ##STR8## wherein X in an integer such that the molecular weight of the biphenylene capped polymer is between about 5,000 and 15,000.
Claim 20
Dependent Claim
15 words
The process of claims 13 or 14 wherein the temperature is from about 300°-350° C.
Claim 21
Dependent Claim
22 words
The process of claims 13 or 14 wherein the melt pressing is carried out at a pressure of about 5000 lbs. load.
Claim 22
Dependent Claim
20 words
The process of claim 14 wherein the transition metal catalyst is a rhodium (I) catalyst or a nickel (O) catalyst.
Claim 23
Dependent Claim
15 words
The process of claim 18 wherein the rhodium (I) catalyst is a norbornadienechlororhodium (I) dimer.
Claim 24
Dependent Claim
15 words
The crosslinked biphenylene end-capped aromatic polymer produced by the process of claims 13 or 14.
Claim 25
Dependent Claim
12 words
The process of claim 1 wherein the monofunctional biphenylene compound is 2-acetylbiphenylene.
References Cited (Backward Citations)
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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) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |