Patent US5532296A successfully refreshed from Google Patents.
US5532296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bismaleimide resin systems toughened by addition of preformed functionalized low Tg elastomer particles
Assignee: Cytec Technology Corp
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Filing: 1993-09-24
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Granted: 1996-07-02
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Expires: 2013-09-24
Abstract
Abstract Bismaleimide resin systems and fiber reinforced prepregs prepared therefrom having exceptional toughness are prepared by dispersing into a bismaleimide base resin system preformed functionalized elastomer particles having a T g of less than 10° C.
Inventors
- 👤 Hans G. Recker
- 👤 Helmut Tesch
- 👤 Thomas Weber
- 👤 Volker Altstaedt
- 👤 Jack D. Boyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:12
CPC Classifications
C; C08; C08L; C08L79/00; C08L79/04; C08J; C08J5/00; C08J5/24; C08J5/241; C08J5/243; C08L63/00; C08L79/08; C08L79/085; C08J2379/00; C08J2379/04; C08J2379/08
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
109 words
A toughened thermosetting bismaleimide resin system, comprising: A. A base resin system comprising (i) one or more bismaleimide functional monomers; (ii) a comonomer which is an alkenylphenol; and (iii) optionally, a dissolved thermoplastic having a T g greater than 150° C.; B. from about 1 percent to about 10 percent by weight relative to the total system weight of a functionalized, lightly crosslinked elastomer having a T g of less than 10° C., and a particle size of from about 2 μm to about 70 μm; and C. optionally, particulate engineering thermoplastics in an amount of from 10 to 30 weight percent based on the total resin system weight.
Claim 2
Dependent Claim
109 words
A toughened thermosetting bismaleimide resin system, comprising: A. A base resin system comprising (i) one or more bismaleimide functional monomers; (ii) a comonomer which is an alkenylphenol; and (iii) optionally, a dissolved thermoplastic having a T g greater than 150° C.; B. from about 1 percent to about 10 percent by weight relative to the total system weight of a functionalized, lightly crosslinked elastomer having a T g of less than 10° C., and a particle size of from about 2 μm to about 70 μm; and C. optionally, particulate engineering thermoplastics in an amount of from 10 to 30 weight percent based on the total resin system weight.
Claim 3
Dependent Claim
19 words
The resin system of claim 1 wherein said functionalized elastomer has a T g of less than 0° C.
Claim 4
Dependent Claim
18 words
The resin system of claim 1 wherein said functionalized elastomer contains carboxyl, carboxamide, epoxy amine, or anhydride functionality.
Claim 5
Dependent Claim
18 words
The resin system of claim 2 wherein said functionalized elastomer contains carboxyl, carboxamide, epoxy, amine, or anhydride functionality.
Claim 6
Dependent Claim
14 words
The resin system of claim 1, further comprising: D. a low viscosity epoxy resin.
Claim 7
Dependent Claim
25 words
The resin system of claim 5 wherein the resin system contains from about 5 weight percent to about 15 weight percent of a dissolved thermoplastic.
Claim 8
Dependent Claim
25 words
The resin system of claim 4 wherein the resin system contains from about 5 weight percent to about 15 weight percent of a dissolved thermoplastic.
Claim 9
Dependent Claim
25 words
The resin system of claim 6 wherein said resin system contains from about 5 weight percent to about 30 weight percent of a particulate thermoplastic.
Claim 10
Dependent Claim
16 words
The resin system of claim 1 wherein said particulate thermoplastic B is a differentially soluble thermoplastic.
Claim 11
Dependent Claim
16 words
The resin system of claim 5 wherein said particulate thermoplastic B is a differentially soluble thermoplastic.
Claim 12
Dependent Claim
33 words
A fiber reinforced thermosettable prepreg comprising (a) from 20 to about 80 weight percent of fibrous reinforcement; and (b) from 80 to about 20 weight percent of the resin system of claim 1.
Claim 13
Dependent Claim
33 words
A fiber reinforced thermosettable prepreg comprising (a) from 20 to about 80 weight percent of fibrous reinforcement; and (b) from 80 to about 20 weight percent of the resin system of claim 2.
Claim 14
Dependent Claim
33 words
A fiber reinforced thermosettable prepreg comprising (a) from 20 to about 80 weight percent of fibrous reinforcement; and (b) from 80 to about 20 weight percent of the resin system of claim 3.
Claim 15
Dependent Claim
33 words
A fiber reinforced thermosettable prepreg comprising (a) from 20 to about 80 weight percent of fibrous reinforcement; and (b) from 80 to about 20 weight percent of the resin system of claim 4.
Claim 16
Dependent Claim
33 words
A fiber reinforced thermosettable prepreg comprising (a) from 20 to about 80 weight percent of fibrous reinforcement; and (b) from 80 to about 20 weight percent of the resin system of claim 5.
Claim 17
Dependent Claim
33 words
A fiber reinforced thermosettable prepreg comprising (a) from 20 to about 80 weight percent of fibrous reinforcement; and (b) from 80 to about 20 weight percent of the resin system of claim 6.
Claim 18
Dependent Claim
33 words
A fiber reinforced thermosettable prepreg comprising (a) from 20 to about 80 weight percent of fibrous reinforcement; and (b) from 80 to about 20 weight percent of the resin system of claim 7.
Claim 19
Dependent Claim
33 words
A fiber reinforced thermosettable prepreg comprising (a) from 20 to about 80 weight percent of fibrous reinforcement; and (b) from 80 to about 20 weight percent of the resin system of claim 8.
Claim 20
Dependent Claim
33 words
A fiber reinforced thermosettable prepreg comprising (a) from 20 to about 80 weight percent of fibrous reinforcement; and (b) from 80 to about 20 weight percent of the resin system of claim 9.
Claim 21
Dependent Claim
33 words
A fiber reinforced thermosettable prepreg comprising (a) from 20 to about 80 weight percent of fibrous reinforcement; and (b) from 80 to about 20 weight percent of the resin system of claim 10.
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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) | 1999-07-02 | 2000-01-01 | 2000-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-02 | 2004-01-01 | 2004-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-02 | 2008-01-01 | 2008-07-02 | $7700.00 | Window Closed / Lapsed |