US4985509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat curable resin composition
Assignee: Hitachi Ltd
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Filing: 1989-05-12
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Granted: 1991-01-15
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Expires: 2009-05-12
Abstract
Abstract A heat curable resin composition comprising (A) a polyimide and (B) a polymaleimide is excellent in heat resistance and suitable for use as a film-shaped adhesive, a laminate or a molding material.
Inventors
- 👤 Hidekazu Matuura
- 👤 Yasuo Miyadera
- 👤 Toshihiko Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:37
CPC Classifications
C; C08; C08L; C08L79/00; C08L79/04; C08L79/08; C08J; C08J5/00; C08J5/24; C08J5/241; C08J5/244; C08J5/249; C08L79/085; C09; C09J; C09J7/00; C09J7/10; H; H05; H05K; H05K3/00; H05K3/38; H05K3/386; C08J2379/00; C08J2379/04; C08J2379/08; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0346; H05K1/0393; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/0154; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
An unsupported film-shaped adhesive consisting essentially of a heat curable resin composition comprising (A) a polyimide produced by using as a diamine component 90 to 30% by mol of bis sulfone and 10 to 70% by mol of 2,4-diamino-toluene and as an acid component 3,3',4,4'-benzophenone-tetracarboxylic dianhydride in substantially equimolar amounts, and (B) a polymaleimide of the formula: ##STR5## wherein R is a hydrocarbon group having a valence of 2 or more or a diphenoxy group; and m is an integer of 2 or more.
Claim 2
Dependent Claim
84 words
An unsupported film-shaped adhesive consisting essentially of a heat curable resin composition comprising (A) a polyimide produced by using as a diamine component 90 to 30% by mol of bis sulfone and 10 to 70% by mol of 2,4-diamino-toluene and as an acid component 3,3',4,4'-benzophenone-tetracarboxylic dianhydride in substantially equimolar amounts, and (B) a polymaleimide of the formula: ##STR5## wherein R is a hydrocarbon group having a valence of 2 or more or a diphenoxy group; and m is an integer of 2 or more.
Claim 3
Dependent Claim
21 words
An unsupported film-shaped adhesive according to claim 1, wherein the diamine component and the acid component are used in equimolar amounts.
Claim 4
Dependent Claim
33 words
An unsupported film-shaped adhesive according to claim 1, obtained by casting a solution of the heat curable resin composition to form a film, drying the film with heating, and peeling off the film.
Claim 5
Dependent Claim
21 words
An unsupported film-shaped adhesive according to claim 1, wherein R is a hydrocarbon group having a valence of 2 or more.
Claim 6
Dependent Claim
45 words
An unsupported film-shaped adhesive according to claim 1, wherein the polymaleimide is at least one selected from the group consisting of N,N'-(b 4,4'-diphenyl-methane)-bismaleimide, N,N'-(4,4'-diphenyloxy)bismaleimide N,N'-p-phenylenebismaleimide, N,N'-m-phenylenebismaleimide, N,N'-2,4-toylenebismaleimide, N,N'-2,6-tolylenebismaleimide, N,N'-ethylenebismaleimide, N,N'-hexamethylenebismaleimide, and polymaleimides of the formulae: ##STR6## wherein n is an integer of 1 or more.
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) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |