Claims
- 1. A curable composition for making an ene-thiol elastomer comprising a mixture of:(a) a polythiol free of hydrophilic groups and having at least two thiol groups; (b) an aromatic, heterocyclic, aliphatic, or cycloaliphatic polyene having at least two reactive unsaturated carbon to carbon bonds; and (c) a free radical initiator, wherein the composition in cured form, when immersed in a solution of 96 parts by weight water and 4 parts by weight n-butanol, shows a weight increase of not more than 4 weight percent in 15 days at a temperature of 22° C.
- 2. The composition of claim 1 wherein the free radical initiator is UV active or thermally active.
- 3. The composition of claim 1 wherein said polyene comprises allyl, vinyl, allyl ether, allyl ester, vinyl ether, styryl, cycloalkenyl, or (meth)acryl compounds, or combinations thereof.
- 4. The composition of claim 1 wherein the polyene is triallyl-1,3,5-triazine-2,4,6-trione; 2,4,6-triallyloxy-1,3,5-triazine; 1,4-cyclohexanedimethanol divinyl ether; 4-vinyl-1-cyclohexene; 1,5-cyclooctadiene; diallyl phthalate; or a combination thereof.
- 5. The composition of claim 1 wherein the polyene is a mixture of a polyene having two reactive unsaturated carbon to carbon bonds and a polyene having three reactive unsaturated carbon to carbon bonds.
- 6. The composition of claim 1 wherein the heterocyclic polyene is triallyl-1,3,5-triazine-2,4,6-trione; 2,4,6-triallyloxy-1,3,5-triazine; or a combination thereof.
- 7. The composition of claim 1 wherein the polythiol has the formula: where m=2-12, n=2-12, q=0-4, where m and n can be the same or different; or the formula H—S—R—S—H, where R=C5-C8 cycloaliphatic radical.
- 8. The composition of claim 1 wherein the polythiol is dimercaptodiethyl sulfide; 1,6-hexanedithiol; 1,8-dimercapto-3,6-dithiaoctane; or a combination thereof.
- 9. An ene-thiol elastomer comprising the reaction product of the composition of claim 1.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a divisional of U.S. application Ser. No. 09/567,944, filed May 10, 2000, now U.S. Pat. No. 6,479,622 allowed, which claims the benefit of U.S. Provisional Application No. 60/134,012, filed May 10, 1999.
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Provisional Applications (1)
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|
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