Claims
- 1. A blend comprising an oligomer and a comparable noncrosslinking polymer, the oligomer comprising a compound of the general formula:
- Ar--M).sub.w
- wherein
- Ar=an aromatic hydrocarbon radical of valency w;
- w=an integer greater than or equal to 3; and
- M=a monovalent hydrocarbon radical having at least one heterocyclic linkage selected from the group consisting of oxazole, imidazole, or thiazole and at least one, terminal crosslinking functionality.
- 2. A prepreg comprising the blend of claim 1 and a reinforcing additive in fiber or particulate form.
- 3. A composite comprising the cured prepreg of claim 2.
- 4. The blend of claim 1 wherein the terminal crosslinking functionality includes a radical selected from the group consisting of: ##STR29## R.sub.1 =lower alkyl, lower alkoxy, aryl, aryloxy, substituted alkyl, substituted aryl, halogen, or mixtures thereof;
- j=0, 1, or 2;
- G=--CH.sub.2, --O--, --S--, or --SO.sub.2 --;
- T=methallyl or allyl; and
- Me=methyl.
- 5. The blend of claim 4 wherein Ar is a residue of a carboxylic acid, the acid being selected from the group consisting of:
- cyuranic acid;
- .phi.--O--.phi.--COOH].sub.3 ;
- .phi.--O--.phi.--(COOH).sub.2 ].sub.3 ; and ##STR30##
- 6. The blend of claim 4 wherein M includes the residue of a four-functional compound of the formula: ##STR31## wherein R=a hydrocarbon radical, Y is selected from the group consisting of --OH, --SH, and --NH.sub.2, each Y group being attached to a carbon atom of R adjacent to a carbon atom to which an --NH.sub.2 is attached.
- 7. The blend of claim 6 wherein the four-functional compound is selected from the group consisting of:
- dihydroxybenzidine;
- dimercaptobenzidine;
- 2,6-diamino-3,5-dihydroxybenzene;
- 2,6-diamino-3,5-dimercaptobenzene; and
- diaminobenzidine.
- 8. The blend of claim 4, the oligomer being formed by the process of condensing a polycarboxylic acid that includes Ar with a four-functional compound of the general formula: ##STR32## wherein R=a hydrocarbon radical, and Y is selected from the group consisting of --OH, --SH, and --NH.sub.2, each Y group being attached to a carbon atom of R adjacent to a carbon atom to which an --NH.sub.2 is attached; a dicarboxylic acid halide, and an end-cap monomer of the general formula: ##STR33## wherein D= ##STR34## R.sub.1 =lower alkyl, lower alkoxy, aryl, aryloxy, substituted alkyl, substituted aryl, halogen, or mixtures thereof;
- j=0, 1, or 2;
- G=--CH.sub.2, --O--, --S--, or --SO.sub.2 --;
- T=methallyl or allyl;
- Me=methyl;
- .phi.=phenyl;
- i=1 or 2;
- z=--COX, --OH, --SH, or --NH.sub.2 ; and
- X=halogen.
REFERENCE TO RELATED APPLICATIONS
This application is a divisional application of application Ser. No. 07/696,492, filed May 6, 1991, which is a divisional application of application Ser. No. 07/544,273, filed Jun. 26, 1990, which is a divisional application of application Ser. No. 07/116,592 filed Nov. 3, 1987, now U.S. Pat. No. 4,965,336 which is a continuation-in-part application based upon application Ser. No. 06/816,490, filed Jan. 6, 1986, now abandoned, which was a continuation-in-part application based upon application Ser. No. 06/651,826, filed Sept. 18, 1984, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (3)
Number |
Date |
Country |
2722513 |
Nov 1978 |
DEX |
2303818 |
Aug 1976 |
FRX |
53-40760 |
Apr 1978 |
JPX |
Non-Patent Literature Citations (1)
Entry |
Sheppard et al., "Novel High Temperature Matrix Materials," Int. Sample Exhib. 1986, 31, Mater. Sci. Future 1426-33, Eng. |
Divisions (3)
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Number |
Date |
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Parent |
696492 |
May 1991 |
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Parent |
544273 |
Jun 1990 |
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Parent |
116592 |
Nov 1987 |
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Continuation in Parts (2)
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Number |
Date |
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Parent |
816490 |
Jan 1986 |
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Parent |
651826 |
Sep 1984 |
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