Claims
- 1. A curable composition, comprising:
(a) at least one compound selected from the group consisting of cyanate esters and cyanate ester prepolymers; (b) a flame retardant which is substantially toluene soluble and substantially free of hydroxy residues in the cured state; and (c) a curing catalyst.
- 2. The composition of claim 1 wherein the flame retardant comprises a cyanate ester-free aryloxytriazine.
- 3. The composition of claim 2 wherein the cyanate ester-free aryloxytriazine contains at least one bromine atom.
- 4. The composition of claim 2 wherein the cyanate ester is represented by a structure of Formula I:
7
- 5. The composition of claim 4 wherein n represents an integer from about 2 to about 5.
- 6. The composition of claim 2 wherein the aryloxytriazine is tris(phenoxy)triazine, tris-(2,4,6-tribromophenoxy)-1,3,5-triazine or the bis(2,4,6-tribromophenol)-terminated condensation product of 2,2-bis(3,5-dibromo-4-hydroxyphenyl)propane and cyanuric chloride.
- 7. The composition of claim 1 wherein the curing catalyst is selected from the group consisting of a phenol-containing compound, a metal carboxylate salt, a metal acetylacetonate salt, and mixtures thereof, where the metal of the salt is selected from the group consisting of zinc, copper, manganese, cobalt, iron, nickel, aluminum, and mixtures thereof.
- 8. The composition of claim 7 wherein the curing catalyst is a combination of (I) at least one phenol-containing compound, and (II) at least one compound selected from the group consisting of a metal carboxylate salt and a metal acetylacetonate salt, where the metal of the salt is selected from the group consisting of zinc, copper, manganese, cobalt, iron, nickel, aluminum, and mixtures thereof.
- 9. The composition of claim 8 in which the phenol-containing compound comprises a poly(phenylene ether) free of polymer having a Tg less than 120° C. containing a styrene residue.
- 10. The composition of claim 9 wherein the phenol-containing compound is selected from the group consisting of phenol-containing poly(2,6-dimethyl-1,4-phenylene ether), phenol-containing poly(2,3,6-trimethyl-1,4-phenylene ether), phenol-containing poly(2,6-dimethyl-1,4-phenylene-co-2,3,6-trimethyl-1,4-phenylene ether), phenol-containing poly(2,6-dibromo-1,4-phenylene ether), phenol-containing poly(2,6-dimethyl-1,4-phenylene-co-2,6-dibromo-1,4-phenylene ether), and mixtures thereof.
- 11. The composition of claim 9 wherein the phenol-containing compound is the reaction product of a poly(phenylene ether), a bisphenol, and an oxidizing agent.
- 12. The composition of claim 11 wherein the poly(phenylene ether) reaction product has a number average molecular weight between about 1,200 and about 8,000.
- 13. The composition of claim 9 wherein the phenol-containing compound is the reaction product of a poly(phenylene ether), and an oxidizing agent.
- 14. The composition of claim 9 wherein the phenol-containing compound is the reaction product of a poly(phenylene ether) and a compound containing a carbon-carbon double bond, or an alcohol group.
- 15. The composition of claim 1 which is reinforced using an inorganic or organic reinforcing filler.
- 16. The composition of claim 1 further comprising an organic or an inorganic extending filler.
- 17. The composition of claim 16 which is reinforced using an inorganic or organic reinforcing filler.
- 18. The composition of claim 15 which is reinforced with a fibrous glass filler.
- 19. The composition of claim 18 in which the fibrous glass filler comprises about 0.5-30 parts Al2O3, about 45-82 parts SiO2, about 0.3-32 parts CaO, and about 2-24 parts B2O3, all parts being parts by weight.
- 20. The composition of claim 18 in which the fibrous glass filler comprises about 15-20 parts Al2O3, about 50-64 parts SiO2, about 5-10 parts CaO, and about 15-20 parts B2O3, all parts being parts by weight.
- 21. The composition of claim 18 in which the fibrous glass filler has a dissipation factor less than 0.0010 measured at 1 MHz.
- 22. The composition of claim 21 in which the fibrous glass filler has a dissipation factor less than 0.0007 measured at 1 MHz.
- 23. The composition of claim 18 in which the fibrous glass filler comprises NE, D, S, or E-type glass.
- 24. The composition of claim 23 in which the fibrous glass filler comprises NE-type glass.
- 25. The composition of claim 1 further comprising at least one of an inorganic or an organic extending filler and an organic or inorganic reinforcing filler.
- 26. The composition prepared by curing the composition of claim 1.
- 27. The composition prepared by partially curing the composition of claim 1.
- 28. A curable composition, comprising:
(a) at least one compound selected from the group consisting of cyanate esters and cyanate ester prepolymers, wherein the cyanate ester is selected from the group consisting of 2,2-bis(4-cyanatophenyl)propane, bis(3,5-dimethyl-4-cyanatophenyl)methane, 1,3-bis [4-cyanatophenyl-1-(1-methylethylidene)]benzene, 1,4-bis[4-cyanatophenyl-1-(1-methylethylidene)]-benzene, and mixtures thereof, and the cyanate ester prepolymer is selected from the group consisting of prepolymers of 2,2-bis(4-cyanatophenyl)-propane, bis(3,5-dimethyl-4-cyanatophenyl)methane, 1,3-bis [4-cyanatophenyl-1-(1-methylethylidene)]benzene, 1,4-bis [4-cyanatophenyl-1-(1-methylethylidene)]benzene, and mixtures thereof; (b) tris(2,4,6-tribromophenoxy)-1,3,5-triazine; and (c) a curing catalyst selected from the group consisting of zinc octoate, zinc acetylacetonate, manganese acetylacetonate, copper acetylacetonate, cobalt acetylacetonate, phenol-containing poly(ether)sulfone, phenol-containing poly(phenylene ether), octyl phenol, nonyl phenol, phenol formaldehyde novolak, and mixtures thereof.
- 29. The curable composition of claim 28 in which the composition is at least partially cured.
- 30. The curable composition of claim 28 comprising an organic or an inorganic extending filler.
- 31. The curable composition of claim 28 comprising an organic or inorganic reinforcing filler.
- 32. The curable composition of claim 28 comprising an inorganic or an organic extending filler and an organic or inorganic reinforcing filler.
- 33. The curable composition of claim 28 which is free of polymer having a Tg less than 120° C. containing a styrene residue.
- 34. A curable composition comprising:
(a) at least one compound selected from the group consisting of cyanate esters and cyanate ester prepolymers, wherein the cyanate ester is selected from the group consisting of bis(3,5-dimethyl-4-cyanatophenyl)-methane, 1,3-bis[4-cyanatophenyl-1-(1-methylethylidene)]benzene, and mixtures thereof, and the cyanate ester prepolymer is selected from the group consisting of prepolymers bis(3,5-dimethyl-4-cyanatophenyl)methane, 1,3-bis[4-cyanatophenyl-1-(1-methylethylidene)]benzene, and mixtures thereof; (b) tris(2,4,6-tribromophenoxy)-1,3,5-triazine; and (c) a curing catalyst selected from the group consisting of zinc octoate, phenol-containing poly(phenylene ether), and mixtures thereof.
- 35. The curable composition of claim 34 in which the composition is at least partially cured.
- 36. The curable composition of claim 34 comprising an organic or an inorganic extending filler.
- 37. The curable composition of claim 34 comprising an organic or inorganic reinforcing filler.
- 38. The curable composition of claim 34 comprising an inorganic or an organic extending filler and an organic or inorganic reinforcing filler.
- 39. The curable composition of claim 34 which is free polymer having a Tg less than 120° C. containing a styrene residue.
- 40. A reinforced, partially cured composition comprising (a) at least one compound selected from the group consisting of cyanate esters and cyanate ester prepolymers; (b) a cyanate ester-free aryloxytriazine; and (c) a curing catalyst.
- 41. The composition of claim 40 which is free of polymer having a Tg less than 120° C. containing a styrene residue.
- 42. A laminate structure comprising a metal foil and a cured composition layer disposed on at least one surface of the metal foil, wherein the reinforced cured composition layer comprises a reaction product of (a) at least one compound selected from the group consisting of cyanate esters and cyanate ester prepolymers; (b) a cyanate ester-free aryloxytriazine; and (c) a curing catalyst.
- 43. The laminate of claim 42 wherein the cured composition layer further comprises a reinforcement.
- 44. The laminate of claim 42 wherein the curing catalyst is selected from the group consisting of zinc octoate, zinc acetylacetonate, manganese acetylacetonate, copper acetylacetonate, cobalt acetylacetonate, phenol-containing poly(ether)sulfone, phenol-containing poly(phenylene ether), octyl phenol, nonyl phenol, phenol formaldehyde novolak, and mixtures thereof.
- 45. The laminate of claim 44 which is free of polymer having a Tg less than 120° C. containing a styrene residue.
Parent Case Info
[0001] This application is a continuation-in-part of copending application Ser. No. 09/096,323, filed Jun. 11, 1998, which is a continuation-in-part of copending application Ser. No. 09/046,278, filed Mar. 23, 1998.
Divisions (1)
|
Number |
Date |
Country |
Parent |
09366098 |
Aug 1999 |
US |
Child |
09760125 |
Jan 2001 |
US |
Continuation in Parts (2)
|
Number |
Date |
Country |
Parent |
09096323 |
Jun 1998 |
US |
Child |
09366098 |
Aug 1999 |
US |
Parent |
09046278 |
Mar 1998 |
US |
Child |
09096323 |
Jun 1998 |
US |