Claims
- 1. A photoinduced polymerizable cyanate ester composition for use in reinforcing a bond, comprising:
a cyanate ester substance comprised of a cationically polymerizable cyanate ester monomer, a cyanate ester prepolymer, or a mixture of the monomer and prepolymer; an effective amount of modifier for enhancing fracture properties of said bond and for assisting in reinforcing said bond; a filler for controlling thermal expansion of said composition and for assisting in reinforcing said bond; and a polymerization photoinitiator comprised of a catalytically effective amount of an organometallic complex salt having a metal cation, upon photolysis, said polymerization photoinitiator liberating at least one coordination site and polymerizing the cyanate ester substance, wherein said metal cation in the organometallic complex is selected from the group consisting of elements of Periodic Groups IVB, VB, VIB, VIIB, and VIIIB.
- 2. The photoinduced polymerizable cyanate ester composition of claim 1, wherein said effective amount of modifier includes a toughening agent comprised of elastomeric units.
- 3. The photoinduiced polymerizable cyanate ester composition of claim 2, wherein said elastomeric units are endcapped with reactive functional groups.
- 4. The photoinduced polymerizable cyanate ester composition of claim 2, wherein said elastomeric units have molecular weights ranging between approximately 500 and approximately 5000.
- 5. The photoinduced polymerizable cyanate ester composition of claim 1, wherein said effective amount of modifier includes elastomers, said elastomers reacting with said cyanate ester substance upon curing to form an epoxy terminated elastomer.
- 6. The photoinduced polymerizable cyanate ester composition of claim 1, wherein said cyanate ester substance is solvent free.
- 7. A process for providing a photoinduced polymerizable cyanate ester composition for use in reinforcing a bond, said process comprising the steps of:
providing cyanate ester substance comprised of a cationically polymerizable cyanate ester monomer, a cyanate ester prepolymer, or a mixture of the monomer and prepolymer; adding to the cyanate ester substance an effective amount of modifier for enhancing fracture properties of said bond and for assisting in reinforcing said bond; adding to the cyanate ester substance a filler for controlling thermal expansion of said composition and for assisting in reinforcing said bond; and adding to the cyanate ester substance a polymerization photoinitiator comprised of a catalytically effective amount of an organometallic complex salt having a metal cation, upon photolysis, the polymerization photoinitiator liberating at least one coordination site and curing the cyanate ester substance, wherein said metal cation in the organometallic complex is selected from the group consisting of elements of Periodic Groups IVB, VB, VIB, VIIB, and VIIIB.
- 8. A lead protective composition comprising the polymerization product of:
(a) at least one cyanate monomer; (b) a polymerization photoinitiator comprised of a catalytically effective amount of an organometallic complex salt having a metal cation, the polymerization photoinitiator liberating at least one coordinative site and polymerizing the at least one cyanate monomer, wherein said metal cation in the organometallic complex is selected from the group consisting of elements of Periodic Group IVB, VB, VIB, VIIB and VIIIB; (c) a filler for controlling thermal expansion of said composition and for assisting in reinforcing said bond; and (d) an effective amount of a modifier for enhancing fracture properties of the protective composition as compared to a lead bond formed without a lead protective composition and for assisting in reinforcing said bond.
- 9. The lead protective composition of claim 8, wherein said effective amount of modifier includes elastomeric units.
- 10. The lead protective composition of claim 9, wherein said elastomeric units are endcapped with reactive functional groups.
- 11. The lead protective composition of claim 9, wherein said elastomeric units have molecular weights ranging between approximately 500 and approximately 5000.
- 12. The lead protective composition of claim 8, wherein said effective amount of modifier includes elastomers, said elastomers reacting with said cyanate ester substance upon curing to form an epoxy terminated elastomer.
Parent Case Info
[0001] This application is a continuation in part of the patent application Ser. No. 08/874,220, which is a divisional application of the patent application Ser. No. 08/548,893, which is now abandoned.
Divisions (2)
|
Number |
Date |
Country |
Parent |
09471520 |
Dec 1999 |
US |
Child |
09771275 |
Jan 2001 |
US |
Parent |
08548893 |
Oct 1995 |
US |
Child |
08874220 |
Jun 1997 |
US |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
08874220 |
Jun 1997 |
US |
Child |
09471520 |
Dec 1999 |
US |