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US4761460A
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Polymaleimide compound and composition containing the same
Assignee: Asahi Kasei Corp
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Filing: 1987-03-04
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Granted: 1988-08-02
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Expires: 2007-03-04
Abstract
Abstract There is provided a novel polymaleimide compound represent by the formula (a) ##STR1## The present polymaleimide compound has a curability comparable to that of an epoxy resin. In addition, it is noted that a cured product prepared from the present polymaleimide compound is excellent in heat resistance and adhesion property and has a low linear expansion coefficient as compared with an epoxy resin. The above-mentioned excellent characteristics of the present polymaleimide compound are never observed with respect to conventional maleimide resins. There is also provided specific compositions containing the present polymaleimide compound for exerting the excellent effects of the present polymaleimide compound most effectively.
Inventors
- 👤 Masahiko Otsuka
- 👤 Hidekazu Ishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:11
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/44; C07D207/444; C07D207/448; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4042; C08G59/50; C08G59/56; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08G73/124; C08G8/00; C08G8/28; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0346
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
106 words
A polymaleimide compound having a structure represented by the formula (a): ##STR31## wherein X is selected from the group consisting of units represented by the formula (b) and units represented by the formula (c): ##STR32## in which A is selected from the group consisting of --CH 2 --, --C(CH 3 ) 2 -- and --SO 2 --; B 1 and B 2 are each independently selected from the group consisting of hydrogen atom, bromine atom and methyl group; Q is a group represented by the formula ##STR33## n is an integer of from 0 to 2; and m is an integer of from 1 to 10.
Claim 2
Dependent Claim
106 words
A polymaleimide compound having a structure represented by the formula (a): ##STR31## wherein X is selected from the group consisting of units represented by the formula (b) and units represented by the formula (c): ##STR32## in which A is selected from the group consisting of --CH 2 --, --C(CH 3 ) 2 -- and --SO 2 --; B 1 and B 2 are each independently selected from the group consisting of hydrogen atom, bromine atom and methyl group; Q is a group represented by the formula ##STR33## n is an integer of from 0 to 2; and m is an integer of from 1 to 10.
Claim 3
Dependent Claim
54 words
A polymaleimide compound according to claim 1, wherein X in the formula (a) is a group represented by the formula (d): ##STR34## wherein B 1 and B 2 are each independently selected from the group consisting of hydrogen atom, bromine atom and methyl group, and n is an integer of from 0 to 2.
Claim 4
Dependent Claim
32 words
A polymaleimide compound according to claim 1, wherein X in the formula (a) is a group represented by the formula (e): ##STR35## wherein n is an integer of from 0 to 2.
Claim 5
Dependent Claim
22 words
A polymaleimide compound according to claim 1, wherein X in the formula (a) is a group represented by the formula (f): ##STR36##
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-02 | 1992-02-01 | 1992-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-02 | 1996-02-01 | 1996-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-02 | 2000-02-01 | 2000-08-02 | $7700.00 | Window Closed / Lapsed |