US5089560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exopy resin with aromatic oligomer and rubber particles
Assignee: BP Corp North America Inc
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Filing: 1990-01-05
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Granted: 1992-02-18
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Expires: 2010-01-05
Abstract
Abstract Fiber reinforced composite structures based on epoxy resin formulations having a phase-separated or multiphase morphology when cured are effectively toughened by adding preformed carboxylated rubber particles to the matrix resin prior to curing the composite.
Inventors
- 👤 Hugh C. Gardner
- 👤 Richard H. Newman-Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:59
CPC Classifications
C; C08; C08L; C08L63/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
A curable matrix resin formulation comprising (a) from 99 to about 75 wt % of a mixture of 100 pbw of an epoxy resin, from 10 to 200 pbw of a terminally reactive, amine-terminated aromatic oligomer having a number average molecular weight greater than about 1000, and from 6 to 150 pbw of at least one aromatic diamine hardener; and (b) from 1 to about 25 wt % of cross-linked carboxylated rubber particles having a Tg above about 15° C. and a smallest dimension in the range of from about 1 to about 75 microns, said particles formed by spray drying a carboxylated rubber having from 0.1 to 5 wt % carboxyl functionality selected from the group consisting of carboxylated diene rubbers, carboxylated acrylic rubbers, and mixtures thereof.
Claim 2
Dependent Claim
128 words
A curable matrix resin formulation comprising (a) from 99 to about 75 wt % of a mixture of 100 pbw of an epoxy resin, from 10 to 200 pbw of a terminally reactive, amine-terminated aromatic oligomer having a number average molecular weight greater than about 1000, and from 6 to 150 pbw of at least one aromatic diamine hardener; and (b) from 1 to about 25 wt % of cross-linked carboxylated rubber particles having a Tg above about 15° C. and a smallest dimension in the range of from about 1 to about 75 microns, said particles formed by spray drying a carboxylated rubber having from 0.1 to 5 wt % carboxyl functionality selected from the group consisting of carboxylated diene rubbers, carboxylated acrylic rubbers, and mixtures thereof.
Claim 3
Dependent Claim
37 words
The curable matrix resin formulation of claim 1 wherein said carboxylated rubber is a carboxylated nitrile rubber having a Tg above about 15° C. and a carboxyl content of from about 1 to about 4 wt %.
Claim 4
Dependent Claim
34 words
The curable matrix resin formulation of claim 1 wherein said rubber particles are formed by spray drying a cross-linked carboxylated rubber selected from the group consisting of carboxylated styrene-butadiene-acrylonitrile rubber and carboxylated acrylic rubber.
Claim 5
Dependent Claim
17 words
The curable matrix formulation of claim 1 wherein said amine-terminated aromatic oligomer is an amine-terminated polysulfone oligomer.
Claim 6
Dependent Claim
25 words
The curable matrix formulation of claim 1 wherein said amine-terminated aromatic oligomer is an amine-terminated polysulfone oligomer derived from p-aminophenol, dichlorodiphenyl sulfone and bisphenol A.
Claim 7
Dependent Claim
148 words
An improved epoxy matrix resin formulation capable of being cured to form a phase-separated morphology including a glassy discontinuous phase dispersed in a glassy continuous phase, said formulation comprising (a) from 99 to about 75 wt % of a curable mixture of at least one epoxy resin, a terminally reactive, amine-terminated aromatic oligomer having a number average molecular weight greater than about 1000, and at least one aromatic diamine hardener; and (b) from 1 to about 25 wt % of particulate modifier, the improvement wherein said particulate modifier comprises cross-linked carboxylated rubber particles having a Tg above about 15° C. and a smallest dimension in the range of from about 1 to about 75 microns, said particles formed by spray drying a carboxylated rubber having from 0.1 to 5 wt % carboxyl functionality selected from the group consisting of carboxylated diene rubbers, carboxylated acrylic rubbers, and mixtures thereof.
Claim 8
Dependent Claim
148 words
An improved epoxy matrix resin formulation capable of being cured to form a phase-separated morphology including a glassy discontinuous phase dispersed in a glassy continuous phase, said formulation comprising (a) from 99 to about 75 wt % of a curable mixture of at least one epoxy resin, a terminally reactive, amine-terminated aromatic oligomer having a number average molecular weight greater than about 1000, and at least one aromatic diamine hardener; and (b) from 1 to about 25 wt % of particulate modifier, the improvement wherein said particulate modifier comprises cross-linked carboxylated rubber particles having a Tg above about 15° C. and a smallest dimension in the range of from about 1 to about 75 microns, said particles formed by spray drying a carboxylated rubber having from 0.1 to 5 wt % carboxyl functionality selected from the group consisting of carboxylated diene rubbers, carboxylated acrylic rubbers, and mixtures thereof.
Claim 9
Dependent Claim
19 words
The improved epoxy matrix resin formulation of claim 6 wherein said carboxylated rubber is a carboxylated styrene-butadiene-acrylonitrile terpolymer rubber.
Claim 10
Dependent Claim
47 words
The improved epoxy matrix resin formulation of claim 6 wherein said curable mixture comprises 100 pbw of at least one epoxy resin, from 10 to 200 pbw of said terminally reactive, amine-terminated aromatic oligomer and from 6 to 150 pbw of at least one aromatic diamine hardener.
Claim 11
Dependent Claim
19 words
The improved epoxy matrix resin formulation of claim 6 wherein said amine-terminated aromatic oligomer is an amine-terminated polysulfone oligomer.
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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) | 1995-02-17 | 1995-08-19 | 1996-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-17 | 1999-08-19 | 2000-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-17 | 2003-08-19 | 2004-02-18 | $7700.00 | Window Closed / Lapsed |