Claims
- 1. A curable sealant compound comprising:
a polythiol; a cyclopolyene having a formula: 10where X is C1-5 aliphatic, Y is a C1-6 aliphatic, R2 is in each occurrence H, C1-C10 alkyl, C2-C10 alkenyl, 11Q—R3 where Q is O or S and R3 is C2-10 alkenyl such that the cyclopolyene has non-conjugated carbon-carbon unsaturated bonds, and in formula (II) there is one non-conjugated carbon-carbon unsaturated bond within the ring that is non-conjugated to other carbon-carbon unsaturated bonds; and an effective amount of a free radical catalyst.
- 2. The compound of claim 1 wherein said free radical catalyst is a peroxide or azonitrile.
- 3. The sealant compound of claim 1 wherein said cyclopolyene is a diene.
- 4. The compound of claim 3 wherein said diene is selected from the group consisting of: vinylcyclohexene, dipentene, dicyclopentadiene, cyclododecadiene, cyclooctadiene, 2-cyclopenten-1-yl-ether, s-vinyl-2-norborene and norbomadiene.
- 5. The compound of claim 1 wherein said cyclopolyene is a triene.
- 6. The compound of claim 5 wherein said triene is cyclododecatriene.
- 7. The compound of claim 1 wherein said cyclopolyene is vinylcyclohexene.
- 8. The compound of claim 1 being a liquid at 20° C. and having a molecular weight of between 1000 and 10,000 Daltons.
- 9. The compound of claim 1 wherein said polythiol and said cyclopolyene are both devoid of oxygen.
- 10. The compound of claim 1 wherein the atomic percentage ratio of C:S:O is between 50-65:15-45:0-15.
- 11. The compound of claim 10 wherein said atomic percent ratio is 55-60:30-40:0.
- 12. The compound of claim 10 wherein said atomic percent ratio is 55-60:15-25:5-15.
- 13. The compound of claim 1 wherein said polythiol is present in a molar stoichiometric excess relative to said cyclopolyene to yield a thiol terminated compound.
- 14. The compound of claim 1 wherein said cyclopolyene is present in a molar stoichiometric excess relative to said polythiol to yield an ene terminated compound.
- 15. The compound of claim 1 having an average functionality of greater than 2.
- 16. A process of forming a polythioether comprising the steps of: mixing a polythiol and a cyclopolyene according to claim 1 in the presence of an effective amount of a catalyst promoting addition therebetween thereby forming said polythioether having terminal reactive groups.
- 17. The process of claim 16 further comprising the step of capping the terminal reactive groups.
- 18. The process of claim 16 wherein said polythiol, said cyclopolyene and said catalyst are mixed under conditions to yield a liquid polythioether having a molecular weight of between 1000 and 10,000 Daltons.
- 19. The process of claim 16 wherein either said polythiol or said cyclopolyene has an average functionality of greater than 2.
- 20. The process of claim 16 wherein said cyclopolyene is selected from the group consisting of: vinylcyclohexene, dipentene, dicyclopentadiene, cyclododecadiene, cyclooctadiene, 2-cyclopenten-1-yl-ether, s-vinyl-2-norborene, norbomadiene and cyclododecatriene.
- 21. A sealant formed by curing a polythioether comprising: a compound according to claim 1, a filler and a curing agent.
- 22. The sealant of claim 21 further comprising at least one additive selected from the group consisting of: pigments, thixotropes, accelerators, retardants, adhesion promoters and masking agents.
- 23. Use of a compound according to claim 1 as a curable sealant.
- 24. A compound substantially as described herein in any of the examples.
RELATED APPLICATION
[0001] This application claims priority of United States Provisional Patent Application No. 60/188,107 filed Mar. 9, 2000, and is incorporated herein by reference.
Provisional Applications (1)
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Number |
Date |
Country |
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60188107 |
Mar 2000 |
US |