US5223584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
In situ thermoset molecular composites
Assignee: Magna International Inc
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Filing: 1991-12-13
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Granted: 1993-06-29
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Expires: 2011-12-13
Abstract
Abstract The present invention provides a composite material comprised of a matrix polymer and a reinforcing polymer, called a rigid rod polymer, which is well dispersed in the matrix polymer. This material displays enhanced mechanical properties. The matrix polymer is preferably cured resin, preferably epoxy resin. The rigid rod polymer may be made from polyazomethines, polyimides or polycarbodimides, or mixtures thereof. Preferably, the reinforcing polymer is a polyazomethine. The invention also relates to a method for making the composite material. The composite material is preferably made by first dissolving the rigid rod polymer precursors in the matrix polymer precursors, then polymerizing the rigid rod polymer precursors in-situ and then polymerizing the matrix polymer precursors, in-situ. Alternatively, the rigid rod polymer precursors may be polymerized in-situ simultaneously with the polymerization of the matrix polymer precursors.
Inventors
- 👤 Gerd M. Lenke
- 👤 Donald R. Wiff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:45
CPC Classifications
C; C08; C08L; C08L77/00; C08L101/00; C08L77/02
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
61 words
A method for preparing a composite material comprising the steps of: a. dissolving precursors to a rigid rod polymer in precursors to a thermosetting matrix polymer; b. reacting the precursors to the rigid rod polymer to form the rigid rod polymer in situ; and c. reacting the precursors to the thermosetting matrix polymer to form the thermosetting matrix polymer in situ.
Claim 2
Independent Claim
61 words
A method for preparing a composite material comprising the steps of: a. dissolving precursors to a rigid rod polymer in precursors to a thermosetting matrix polymer; b. reacting the precursors to the rigid rod polymer to form the rigid rod polymer in situ; and c. reacting the precursors to the thermosetting matrix polymer to form the thermosetting matrix polymer in situ.
Claim 3
Independent Claim
69 words
A method for preparing a composite material comprising the steps of: a. dissolving precursors to a rigid rod polymer in precursors to a matrix polymer; b. reacting the precursors to the rigid rod polymer selected from the group consisting essentially of: polyazomethines; polyimides; and polycarbodiimides; to form the rigid rod polymer in situ; and c. reacting the precursors to the matrix polymer to form the matrix polymer in situ.
Claim 4
Independent Claim
69 words
A method for preparing a composite material comprising the steps of: a. dissolving precursors to a rigid rod polymer in precursors to a matrix polymer; b. reacting the precursors to the rigid rod polymer selected from the group consisting essentially of: polyazomethines; polyimides; and polycarbodiimides; to form the rigid rod polymer in situ; and c. reacting the precursors to the matrix polymer to form the matrix polymer in situ.
Claim 5
Independent Claim
98 words
A method for preparing a composite material comprising the steps of: a. dissolving precursors to a rigid rod polymer in precursors to a thermosetting matrix polymer; b. reacting the precursors to the rigid rod polymer to form the rigid rod polymer in situ; and c. reacting the precursors to the thermosetting matrix polymer to form the thermosetting matrix polymer in situ, wherein the rigid rod polymer is dispersed in the matrix polymer, and further wherein the reaction of the precursors to the rigid rod polymer is no later than the polymerization of the precursors to the matrix polymer.
Claim 6
Independent Claim
98 words
A method for preparing a composite material comprising the steps of: a. dissolving precursors to a rigid rod polymer in precursors to a thermosetting matrix polymer; b. reacting the precursors to the rigid rod polymer to form the rigid rod polymer in situ; and c. reacting the precursors to the thermosetting matrix polymer to form the thermosetting matrix polymer in situ, wherein the rigid rod polymer is dispersed in the matrix polymer, and further wherein the reaction of the precursors to the rigid rod polymer is no later than the polymerization of the precursors to the matrix polymer.
Claim 7
Dependent Claim
12 words
The method of claim 1 wherein the rigid rod polymer is polyazomethine.
Claim 8
Dependent Claim
19 words
The method of claim 1, wherein the precursors to the rigid rod polymer are comprised of diamines and dialdehydes.
Claim 9
Dependent Claim
17 words
The method of claim 1, wherein the precursors to the rigid rod polymer are p-phenylenediamine and terephthalaldehyde.
Claim 10
Dependent Claim
27 words
The method of claim 1, wherein the precursors to the rigid rod polymer are p-phenylenediamine and terephthalaldehyde, and the precursors to the matrix polymer is epoxy resin.
Claim 11
Dependent Claim
12 words
The method of claim 1 wherein the rigid rod polymer is polyimide.
Claim 12
Dependent Claim
20 words
The method of claim 1, wherein the precursors to the rigid rod polymer comprised of pyromellitic dianhydride and p-phenylene diamine.
Claim 13
Dependent Claim
12 words
The method of claim 1 wherein the rigid rod polymer is polycarbodiimide.
Claim 14
Dependent Claim
17 words
The method of claim 1, wherein the precursors to the rigid rod polymer are comprised of diisocyanate.
Claim 15
Dependent Claim
17 words
The method of claim 1, wherein the precursors to the matrix polymer are comprised of epoxy resins.
Claim 16
Dependent Claim
41 words
The method of claim 1, wherein the precursors to the matrix polymer are comprised of epoxy resin having the following structure: ##STR19## Wherein n=1 for about 15% by weight of the resin, and wherein n=0 for about 85% of the resin.
Claim 17
Dependent Claim
43 words
A composite material comprising: a matrix polymer; and a rigid rod polymer; wherein precursors to the rigid rod polymer have been dissolved in precursors to the matrix polymer and wherein the rigid rod precursors and the matrix polymer precursors are polymerized in situ.
Claim 18
Dependent Claim
43 words
A composite material comprising: a matrix polymer; and a rigid rod polymer; wherein precursors to the rigid rod polymer have been dissolved in precursors to the matrix polymer and wherein the rigid rod precursors and the matrix polymer precursors are polymerized in situ.
Claim 19
Dependent Claim
13 words
The composite material of claim 14, wherein the rigid rod polymer is polyazomethine.
Claim 20
Dependent Claim
19 words
The method of claim 14, wherein the precursors to the rigid rod polymer are comprised of diamines and dialdehydes.
Claim 21
Dependent Claim
18 words
The composite material of claim 14, wherein the precursors to the rigid rod polymer are p-phenylenediamine and terephthalaldehyde.
Claim 22
Dependent Claim
28 words
The composite material of claim 14, wherein the precursors to the rigid rod polymer are p-phenylenediamine and terephthalaldehyde, and the precursors to the matrix polymer is epoxy resin.
Claim 23
Dependent Claim
12 words
The composite of claim 14 wherein the rigid rod polymer is polyimide.
Claim 24
Dependent Claim
21 words
The composite material of claim 14, wherein the precursor to the rigid rod polymer comprised of pyromellitic dianhydride and p-phenylene diamine.
Claim 25
Dependent Claim
13 words
The composite material of claim 14 wherein the rigid rod polymer is polycarbodiimide.
Claim 26
Dependent Claim
18 words
The composite material of claim 14, wherein the precursors to the rigid rod polymer are comprised of diisocyanate.
Claim 27
Dependent Claim
18 words
The composite material of claim 14, wherein the precursors to the matrix polymer are comprised of epoxy resins.
Claim 28
Dependent Claim
42 words
The composite material of claim 14, wherein the precursors to the matrix polymer are comprised of epoxy resin having the following structure: ##STR20## Wherein n=1 for about 15% by weight of the resin, and wherein n=0 for about 85% of the resin.
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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) | 1996-06-28 | 1996-12-28 | 1997-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-28 | 2000-12-28 | 2001-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-28 | 2004-12-28 | 2005-06-29 | $7700.00 | Window Closed / Lapsed |