Claims
- 1. A product resulting from curing an epoxy resin having an average of more than one vicinal epoxy group per molecule with a curing quantity of a novolac resin prepared from (1) an organic material having at least one aromatic hydroxyl group per molecule selected from the group consisting of (a) phenol and (b) a mixture of phenol and a substituted phenol wherein the substituent groups are hydroxyl, hydrocarbyl or hydrocarbyloxy groups having from 1 to about 9, carbon atoms, or a halogen and wherein more than about 50 mole percent of the mixture is phenol and (2) an aldehyde, said novolac resin having an average functionality of from about 3 to about 6, containing less than about 18 percent of 2-functional component by weight with the proviso that when 2-functional and 3-functional components are both present, they are present in a weight ratio of 2-functional component to 3-functional component of less than about 1.1:1.
- 2. A product of claim 1 wherein
- (i) said aldehyde is an aliphatic, cycloaliphatic or aromatic aldehyde having from 1 to about 14 carbon atoms;
- (ii) said novolac resin contains less than about 12.5 percent 2-functional component by weight and the weight ratio of 2-functional component to 3-functional component is less than about 0.75:1; and
- (iii) said material having at least one aromatic hydroxyl group per molecule contains more than 70 mole percent phenol.
- 3. A product of claim 2 wherein
- (i) said aldehyde is formaldehyde;
- (ii) said novolac resin contains less than about 7 percent 2-functional component by weight and the weight ratio of 2-functional component to 3-functional component is less than about 0.5:1; and
- (iii) said material having at least one aromatic hydroxyl group per molecule contains more than 85 mole percent phenol.
- 4. A product resulting from curing an epoxy resin having an average of more than one vicinal epoxy group per molecule with a curing quantity of a novolac resin prepared from (1) a material having at least one aromatic hydroxyl group per molecule selected from the group consisting of (a) phenol and (b) a mixture of phenol and a substituted phenol wherein the substituent groups are hydroxyl, hydrocarbyl or hydrocarbyloxy groups having from 1 to about 9, carbon atoms, or a halogen and wherein more than about 50 mole percent of the mixture is phenol and (2) an aldehyde; said novolac resin having an average functionality of from about 4 to about 12 and which contains less than about 14 percent of weight 2-functional component; with the proviso that when 2-functional and 3-functional components are both present, the weight ratio of 2-functional component to 3-functional component is less than about 1.1:1.
- 5. A product of claim 4 wherein
- (i) said aldehyde is an aliphatic, cycloaliphatic or aromatic aldehyde having from 1 to about 14 carbon atoms;
- (ii) said novolac resin contains less than about 9 percent by weight of two functional component with the proviso that when 2-functional component and 3-functional component are both present, the weight ratio of 2-functional component to 3-functional component is less than about 0.75:1; and
- (iii) said material having at least one aromatic hydroxyl group per molecule contains more than 70 mole percent phenol.
- 6. A product of claim 5 wherein
- (i) said aldehyde is formaldehyde;
- (ii) said novolac resin contains less than about 5 percent by weight of two functional component; with the proviso that when 2-functional component and 3-functional component are both present, the weight ratio of 2-functional component to 3-functional component is less than about 0.5:1; and
- (iii) said material having at least one aromatic hydroxyl group per molecule contains more than 85 mole percent phenol.
- 7. A product of claim 1, 2, 3, 4, 5, or 6 wherein said epoxy resin is a glycidyl ether of a bisphenol or a glycidyl ether of a novolac resin.
- 8. A product of claim 7 wherein said epoxy resin is a glycidyl ether of a phenol-formaldehyde novolac resin.
- 9. A product of claim 1, 2, 3, 4, 5, or 6 which contains a reinforcing material comprising a natural or synthetic fibrous material in filament, mat or woven form.
- 10. A product of claim 9 wherein said reinforcing material is glass, carbon, graphite or aramid.
- 11. A product of claim 7 which contains a reinforcing material comprising a natural or synthetic fibrous material in filament, mat or woven form.
- 12. A product of claim 11 wherein said reinforcing material is glass, carbon, graphite or aramid.
- 13. A product of claim 8 which contains a reinforcing material comprising a natural or synthetic fibrous material in filament, mat or woven form.
- 14. A product of claim 13 wherein said reinforcing material is glass, carbon, graphite or aramid.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8604531[U] |
Jan 1986 |
BRX |
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CROSS REFERENCE TO RELATED APPLICATION
This is a continuation-in-part of our copending application Ser. No. 690,702 filed Jan. 11, 1985, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4611036 |
Sekiguchi et al. |
Sep 1986 |
|
4649188 |
Bertram et al. |
Mar 1987 |
|
Non-Patent Literature Citations (2)
Entry |
Lee et al.; Handbook of Epoxy Resins; McGraw Hill Book Co.; 1967; pp. 2-10, 2-11, 11-14, 11-15. |
Quatrex; Dow Chemical Co.; Form No. 296-598-85. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
690702 |
Jan 1985 |
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