Patent US3466383A successfully refreshed from Google Patents.
Patent US5627222A successfully refreshed from Google Patents.
US5627222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toughened, fiber-reinforced thermosetting resin matrix prepregs and composites made therefrom
Assignee: Cytec Technology Corp
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Filing: 1995-01-09
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Granted: 1997-05-06
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Expires: 2015-01-09
Abstract
Abstract The subject invention pertains to toughened thermosetting resin systems useful as structural adhesives and as matrix resins for thermosetting fiber-reinforced prepregs. These toughened resins employ a most minor amount of functionalized elastomeric particles having a T g of 10° C. or below dispersed in a thermosetting base resin system.
Inventors
- 👤 Hans G. Recker
- 👤 Volker Altsaedt
- 👤 Helmut Tesch
- 👤 Thomas Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:02
CPC Classifications
C; C08; C08L; C08L63/00; C08L79/00; C08L79/04; C08L79/08; C08L79/085
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
161 words
A curable thermosetting resin system for forming a toughened single phase cured matrix resin, said resin system consisting essentially of: A. a base resin system consisting essentially of (i) one or more thermosetting resin monomers selected from the group consisting of the bismaleimide resins, epoxy resins, cyanate resins, and mixtures thereof: (ii) at least one curing agent (iii) optionally catalysts; and (iv) optionally at least one dissolved thermoplastic in an amount effective to assist the toughness of the single phase cured matrix resin; B. optionally, particulate engineering thermoplastics in an amount of from 10 to 30 weight percent based on the total resin system weight; and C. from about 1 percent to about 10 percent by weight relative to the total system weight of preformed functionalized, lightly crosslinked elastomer particles having a T g of less than 10° C., and a particle size of from about 2 μm to about 70 μm wherein said elastomer particles remain in substantially particulate form.
Claim 2
Dependent Claim
161 words
A curable thermosetting resin system for forming a toughened single phase cured matrix resin, said resin system consisting essentially of: A. a base resin system consisting essentially of (i) one or more thermosetting resin monomers selected from the group consisting of the bismaleimide resins, epoxy resins, cyanate resins, and mixtures thereof: (ii) at least one curing agent (iii) optionally catalysts; and (iv) optionally at least one dissolved thermoplastic in an amount effective to assist the toughness of the single phase cured matrix resin; B. optionally, particulate engineering thermoplastics in an amount of from 10 to 30 weight percent based on the total resin system weight; and C. from about 1 percent to about 10 percent by weight relative to the total system weight of preformed functionalized, lightly crosslinked elastomer particles having a T g of less than 10° C., and a particle size of from about 2 μm to about 70 μm wherein said elastomer particles remain in substantially particulate form.
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
20 words
The resin system of claim 1 wherein the base resin (A) comprises in major part, one or more epoxy resins.
Claim 7
Dependent Claim
25 words
The resin system of claim 1 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 5 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 1 wherein said resin system contains from about 5 weight percent to about 30 weight percent of a particulate thermoplastic.
Claim 10
Dependent Claim
25 words
The resin system of claim 5 wherein said resin system contains from about 10 weight percent to about 30 weight percent of a particulate thermoplastic.
Claim 11
Dependent Claim
25 words
The resin system of claim 6 wherein said resin system contains from about 10 weight percent to about 30 weight percent of a particulate thermoplastic.
Claim 12
Dependent Claim
15 words
The resin system of claim 8 wherein said particulate thermoplastic is a differentially soluble thermoplastic.
Claim 13
Dependent Claim
15 words
The resin system of claim 9 wherein said particulate thermoplastic is a differentially soluble thermoplastic.
Claim 14
Dependent Claim
33 words
A fiber-reinforced prepreg, comprising: (a) from 20 to about 80 percent by weight of fibrous reinforcement; and (b) from 80 to about 20 percent by weight of the resin system of claim 1.
Claim 15
Dependent Claim
33 words
A fiber-reinforced prepreg, comprising: (a) from 20 to about 80 percent by weight of fibrous reinforcement; and (b) from 80 to about 20 percent by weight of the resin system of claim 2.
Claim 16
Dependent Claim
33 words
A fiber-reinforced prepreg, comprising: (a) from 20 to about 80 percent by weight of fibrous reinforcement; and (b) from 80 to about 20 percent by weight of the resin system of claim 4.
Claim 17
Dependent Claim
33 words
A fiber-reinforced prepreg, comprising: (a) from 20 to about 80 percent by weight of fibrous reinforcement; and (b) from 80 to about 20 percent by weight of the resin system of claim 5.
Claim 18
Dependent Claim
33 words
A fiber-reinforced prepreg, comprising: (a) from 20 to about 80 percent by weight of fibrous reinforcement; and (b) from 80 to about 20 percent by weight of the resin system of claim 6.
Claim 19
Dependent Claim
33 words
A fiber-reinforced prepreg, comprising: (a) from 20 to about 80 percent by weight of fibrous reinforcement; and (b) from 80 to about 20 percent by weight of the resin system of claim 9.
Claim 20
Dependent Claim
33 words
A fiber-reinforced prepreg, comprising: (a) from 20 to about 80 percent by weight of fibrous reinforcement; and (b) from 80 to about 20 percent by weight of the resin system of claim 10.
Claim 21
Dependent Claim
33 words
A fiber-reinforced prepreg, comprising: (a) from 20 to about 80 percent by weight of fibrous reinforcement; and (b) from 80 to about 20 percent by weight of the resin system of claim 11.
Claim 22
Dependent Claim
26 words
The resin system of claim 1 wherein said thermosetting resin monomer A.(i) is selected from the group consisting of bismaleimide resins, cyanate resins, and mixtures thereof.
Claim 23
Dependent Claim
26 words
The resin system of claim 2 wherein said thermosetting resin monomer A.(i) is selected from the group consisting of bismaleimide resins, cyanate resins, and mixtures thereof.
References Cited (Backward Citations)
US5089560A
Cited
US5153274A
Cited
US5087681A
Cited
US4946907A
Cited
US4656208A
Cited
US4654405A
Cited
US5364700A
Cited
US4740552A
Cited
US4999238A
Cited
EP0252725A2
Cited
US4783506A
Cited
US4863787A
Cited
US5028478A
Cited
EP0274899A2
Cited
GB2207139A
Cited
US4908088A
Cited
EP0351027A2
Cited
EP0351028A2
Cited
US5169710A
Cited
US4977218A
Cited
US4977215A
Cited
EP0441047A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-05-05 | 2000-11-04 | 2001-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-05-05 | 2004-11-04 | 2005-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-05-05 | 2008-11-04 | 2009-05-06 | $7700.00 | Window Closed / Lapsed |