Patent ID: 6605691
Filing Date: 2003-08-12
Classification: C08G,H05K

Abstract:
An article of manufacture comprising electric or electronic components encapsulated in an ene-thiol elastomer comprising the reaction product of:(a) a thiol terminated oligomer comprising the reaction product of a polythiol having two thiol groups and a first polyene or mixture of polyenes having two reactive unsaturated carbon to carbon bonds wherein not more than 50 weight percent of the polythiol contains hydrophilic groups and wherein the first polyene comprises allyl, styryl, cycloalkenyl, 1,4-cyclohexanedimethanol divinyl ether, or (meth)acryl compounds or combinations thereof; and (b) a second polyene or a mixture of polyenes, having at least 5 percent functional equivalents of unsaturated carbon to carbon bonds from polyenes having at least three unsaturated carbon to carbon bonds, 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 22Â° C.