Patent US4667003A successfully refreshed from Google Patents.
US4667003A
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Crosslinked polymers prepared from allyl or methallyl-bicyclo[2,2,1]hept-5-ene-2,3-dicarboxylic acid imides and bisimides
Assignee: Novartis Corp
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Filing: 1985-01-16
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Granted: 1987-05-19
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Expires: 2005-01-16
Abstract
Abstract Crosslinked polymers with excellent physical properties are prepared by heating at 180 DEG -300 DEG C. the imides of the formula I <IMAGE> (I) in which E is allyl or methallyl, R is hydrogen, alkyl, alkenyl, cycloalkyl, aryl or benzyl when n is 1, and R is alkylene or arylene when n is 2. The polymers can be used, in particular, for the preparation of glass fiber-reinforced and carbon fibre-reinforced plastics and as electrical insulating materials.
Inventors
- 👤 Alfred Renner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:05
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08G73/126; C07; C07D; C07D209/00; C07D209/56; C07D209/58; C07D209/72; C07D209/76; C08F; C08F12/00; C08F12/02; C08F12/32; C08F22/00; C08F22/36; C08F22/40; C08G73/125; C08G73/127
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
114 words
A polymer, which is obtained by heating an imide of formula I ##STR14## in which E is allyl or methallyl, n is 1 or 2 and, when n is 1, R is hydrogen, alkyl having 1-12 C atoms, alkenyl having 3-6 atoms, cycloalkyl having 5-8 C atoms, phenyl, tolyl, xylyl or naphthyl, or benzyl or, when n is 2, R is --C m H 2m --, in which m is an integer of 2-20, m-phenylene, p-phenylene, 1,3-naphthylene, 1,4-naphthylene or 1,5-naphthylene or a group of the formula II ##STR15## in which T is methylene, isopropylidene, CO, O, S or SO 2 , at a temperature between 180° and 300° C. for 6 to 24 hours.
Claim 2
Dependent Claim
114 words
A polymer, which is obtained by heating an imide of formula I ##STR14## in which E is allyl or methallyl, n is 1 or 2 and, when n is 1, R is hydrogen, alkyl having 1-12 C atoms, alkenyl having 3-6 atoms, cycloalkyl having 5-8 C atoms, phenyl, tolyl, xylyl or naphthyl, or benzyl or, when n is 2, R is --C m H 2m --, in which m is an integer of 2-20, m-phenylene, p-phenylene, 1,3-naphthylene, 1,4-naphthylene or 1,5-naphthylene or a group of the formula II ##STR15## in which T is methylene, isopropylidene, CO, O, S or SO 2 , at a temperature between 180° and 300° C. for 6 to 24 hours.
Claim 3
Dependent Claim
16 words
A polymer according to claim 1 where in the imide of formula I E is allyl.
Claim 4
Dependent Claim
79 words
A polymer according to claim 1 where in the imide of formula I E is the allyl group and, when n is 1, R is hydrogen, alkyl having 1-8 C atoms, allyl, cyclohexyl, phenyl or benzyl, or, when n is 2, R is --(CH 2 ) m --, in which m is an integer of 2-12, m- or p-phenylene or a group of the formula II ##STR16## in which T is the methylene group, O or SO 2 .
Claim 5
Dependent Claim
38 words
A polymer according to claim 1 where in the imide of formula I E is the allyl group, n is the number 2 and R is --(CH 2 ) 2 --, --(CH 2 ) 6 -- or ##STR17##
Claim 6
Dependent Claim
14 words
A polymer according to claim 1 where the imide of formula I is ##STR18##
Claim 7
Dependent Claim
14 words
A polymer according to claim 1 where the imide of formula I is ##STR19##
Claim 8
Dependent Claim
14 words
A polymer according to claim 1 where the imide of formula I is ##STR20##
Claim 9
Dependent Claim
40 words
A polymer according to claim 1 which is obtained by heating an imide of formula I where E is allyl, n is 2 and R is ##STR21## at a temperature of 240° to 250° C. for 6 to 12 hours.
References Cited (Backward Citations)
US2393999A
Cited
US2424220A
Cited
US3105839A
Cited
US3334075A
Cited
US3450711A
Cited
GB1277790A
Cited
US3839358A
Cited
US3879349A
Cited
US4229351A
Cited
US4271074A
Cited
EP0032745A2
Cited
US4526962A
Cited
US4380643A
Cited
US4587317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |