Patent US4654407A successfully refreshed from Google Patents.
US4654407A
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Aromatic bismaleimide and prepreg resin therefrom
Assignee: BP Corp North America Inc
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Filing: 1985-08-02
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Granted: 1987-03-31
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Expires: 2005-08-02
Abstract
Abstract Described herein are novel bismaleimides and prepregable resin compositions comprising these bismaleimides and one or more liquid coreactants and optionally, one or more other additives. The novel bismaleimides, such as alpha, alpha-bis-(4-maleimidophenyl)-meta-diisopropylbenzene, are characterized by the presence of three aromatic rings in the molecular structure and in some respects optimize the desirable characteristics of the one or two and four aromatic ring-containing bismaleimides in resins prepared therefrom.
Inventors
- 👤 Linda A. Domeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:54
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/44; C07D207/444; C07D207/448; C07D207/452; C08; C08F; C08F283/00; 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; C08G8/00; C08G8/28; C08J; C08J5/00; C08J5/24; C08J5/241; C08J5/243; C08J2379/00; C08J2379/04; C08J2379/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
83 words
A bismaleimide of the formula: ##STR16## wherein Ar is selected from the group consisting of a single aromatic nucleus, a fused aromatic nucleus, a single aromatic nucleus containing one or more R or R 1 groups, and a fused aromatic nucleus containing one or more R or R 1 groups; R and R 1 individually represent alkyl or halogen groups; R 2 represents an alkyl group of from 1 to 12 carbon atoms; and n has a value of from 0 to 4.
Claim 2
Dependent Claim
83 words
A bismaleimide of the formula: ##STR16## wherein Ar is selected from the group consisting of a single aromatic nucleus, a fused aromatic nucleus, a single aromatic nucleus containing one or more R or R 1 groups, and a fused aromatic nucleus containing one or more R or R 1 groups; R and R 1 individually represent alkyl or halogen groups; R 2 represents an alkyl group of from 1 to 12 carbon atoms; and n has a value of from 0 to 4.
Claim 3
Dependent Claim
18 words
A bismaleimide as defined in claim 1 where Ar is phenylene, and R and R 1 are hydrogen.
Claim 4
Dependent Claim
11 words
A bismaleimide as defined in claim 1 where Ar is meta-phenylene.
Claim 5
Dependent Claim
11 words
A bismaleimide as defined in claim 1 where Ar is para-phenylene.
Claim 6
Dependent Claim
12 words
A bismaleimide as defined in claim 1 of the following formula: ##STR17##
Claim 7
Dependent Claim
12 words
A bismaleimide as defined in claim 1 of the following formula: ##STR18##
Claim 8
Dependent Claim
112 words
A bismaleimide of the formula: ##STR19## wherein Ar is selected from the group consisting of a single aromatic nucleus, a fused aromatic nucleus, a single aromatic nucleus containing one or more R or R 1 groups, and a fused aromatic nucleus containing one or more R or R 1 groups; R and R 1 individually represent alkyl or halogen groups; R 2 represents an alkyl group of from 1 to 12 carbon atoms; and n has a value of from 0 to 4 in which up to 50% of the maleimide or substituted maleimide groups have been replaced by the following terminal imide groups: ##STR20## succinimide, phthalimide, and substituted succinimide, and phthalimide.
Claim 9
Dependent Claim
112 words
A bismaleimide of the formula: ##STR19## wherein Ar is selected from the group consisting of a single aromatic nucleus, a fused aromatic nucleus, a single aromatic nucleus containing one or more R or R 1 groups, and a fused aromatic nucleus containing one or more R or R 1 groups; R and R 1 individually represent alkyl or halogen groups; R 2 represents an alkyl group of from 1 to 12 carbon atoms; and n has a value of from 0 to 4 in which up to 50% of the maleimide or substituted maleimide groups have been replaced by the following terminal imide groups: ##STR20## succinimide, phthalimide, and substituted succinimide, and phthalimide.
Claim 10
Dependent Claim
16 words
A bismaleimide mixture consisting of a mixture of the bismaleimides of claim 3 and claim 4.
Claim 11
Dependent Claim
17 words
A bismaleimide mixture which consists of a mixture of the bismaleimides of claim 5 and claim 6.
Claim 12
Dependent Claim
16 words
A prepregable resin composition comprising the bismaleimide of claim 1 and one or more liquid coreactants.
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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) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |