| 摘要 |
Curable thiol/ene compositions comprise: (1) a multifunctional styryloxy monomer having one or more of the following structures <IMAGE> <IMAGE> <IMAGE> wherein R1, R2 and R3 are selected from vinyl (-CH=CH2), 1-propenyl (-CH=CH-CH3), isopropenyl <IMAGE> hydrogen, lower alkyl or alkoxy, provided that at least one of R1, R2 and R3 must be vinyl, 1-propenyl or isopropenyl; n is an integer >/=1; if n=1, then R4 is a monovalent hydrocarbon radical containing one free-radically copolymerizable alkenyl or cycloalkenyl group, if n>/=2, R4 is a multivalent hydrocarbon radical which may contain a maximum of one free-radically copolymerizable alkenyl or cycloalkenyl group; R5 is a divalent hydrocarbon radical; or a carbon atom which is part of a cyclic group in the radical G; or a radical of formula <IMAGE> where R7 is a divalent hydrocarbon radical; if n=1, G is a monovalent organic or inorganic radical, free of phenolic hydroxyl groups or other groups which substantially interfere with radical polymerization, containing one free-radically copolymerizable alkenyl or cycloalkenyl group; if n>/=2, G is a multivalent organic or inorganic radical, free of phenolic hydroxyl groups or other groups which substantially interfere with radical polymerization, which may contain a maximum of one free-radically copolymerizable alkenyl or cycloalkenyl group; R6 is a lower alkyl or cycloalkyl group; or if n=1, R6 may also be an alkenyl or cycloalkenyl group, provided that G does not contain an alkenyl or cycloalkenyl group. (2) a multifunction thiol. (3) a free-radical curing rate accelerator. Novel styryloxy compounds are described which are reaction products of isoeugenol and (a) multifunctional epoxy compounds or (b) allyl glycidyl ether with or without a multifunctional polydimethylsiloxane.
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