Hydroxyaryl phosphine oxides, glycidyl ethers and epoxy compositions, composites and laminates derived therefrom
View Patent ↗The invention provides new compositions of matter that are capable of forming cross-linked polymeric materials upon reaction with various known epoxy-containing compositions. Thus, the compositions of this invention are useful in the manufacturing of prepregs and laminates for PWB applications among many other uses. Preferred compositions of this invention include substituted hydroxyarylphosphine oxide mixtures, the glycidyl ether derivatives, or the epoxy resin oligomer adducts derived therefrom. The materials provide for laminates that have higher glass transition temperatures, improved thermal stability, and that are free of halogen.
1. A flame retardant epoxy composition derived from a mixture of hydroxyarylphosphine oxides by way of reacting said mixture of hydroxyarylphosphine oxides with an epoxy resin composition, said mixture of hydroxyarylphosphine oxides comprising:
(a) a mono(hydroxyaryl)phosphine oxide of the formula:
wherein R 1 is a divalent, substituted or unsubstituted arylene moiety and R 2 is a monovalent, substituted or unsubstituted aryl moiety or is an alkyl moiety or is an aralkyl moiety; and
(b) a bis(hydroxyaryl)phosphine oxide of the formula:
wherein R 1 , R 2 are defined as above; and
(c) a tris(hydroxyaryl)phosphine oxide of the formula:
wherein R 1 , is defined as above; and
(d) optionally containing minor amounts of a pentavalent phosphine oxide of the formula:
wherein R 2 is defined as above.
2. A resin-impregnated composite comprising a reinforcing component and the flame retardant epoxy composition according to claim 1 , at least partially cured.
3. The resin-impregnated composite according to claim 2 , including a glass filler, a glass fiber or a glass fabric.
4. The resin-impregnated composite according to claim 3 , wherein said composite includes a glass fabric.
5. A flame retardant curable composition comprising at least one component selected from the group consisting of: (i) an epoxy component derived from a mixture of hydroxyarylphosphine oxides by way of reacting said mixture of hydroxyarylphosphine oxides with a diglycidyl ether or mixture of diglycidyl ethers or polyglycidyl ethers; and (ii) a mixture of glycidyl ethers derived from said mixture of hydroxyarylphosphine oxides, said mixture of hydroxyarylphosphine oxides comprising:
(a) a mono(hydroxyaryl)phosphine oxide of the formula:
wherein R 1 is a divalent, substituted or unsubstituted arylene moiety and R 2 is a monovalent, substituted or unsubstituted aryl moiety or is an alkyl moiety or is an aralkyl moiety; and
(b) a bis(hydroxyaryl)phosphine oxide of the formula:
wherein R 1 and R 2 are defined as above; and
(c) a tris(hydroxyaryl)phosphine oxide of the formula:
wherein R 1 is defined as above; and
(d) optionally containing minor amounts of a pentavalent phosphine oxide of the formula:
wherein R 2 is defined as above.
6. The curable composition according to claim 5 , further comprising an epoxy resin based on epichlorohydrin and bisphenol A, bisphenol F, or a novolak epoxy resin.
7. The curable composition according to claim 5 , wherein at least one component is an oligomer derived from the reaction of said mixture of hydroxyarylphosphine oxides with a mixture of glycidyl ethers derived from said mixture of hydroxyarylphosphine oxides.
8. A resin-impregnated composite comprising a reinforcing component and the flame retardant curable composition according to claim 5 , at least partially cured.
9. The resin-impregnated composite according to claim 8 , including a glass filler, a glass fiber or a glass fabric.
10. The resin-impregnated composite according to claim 9 , wherein said composite includes a glass fabric.