Roehm Gmbh Chemische Fabrik Patentabteilung

Gerhard Schwinn

Patrik Hartmann

Martina Bader

The invention relates to a method of producing (meth)acryloylthio esters of general formula I ##STR1## where R represents hydrogen or methyl, and R.sup.1 represents a phenyl group, a substituted phenyl group, a C.sub.1-24 alkyl group, a substituted C.sub.1-24 alkyl group, a cyclic C.sub.3-24 alkyl group; comprising reacting (meth)acrylic acid anhydride (formula II) ##STR2## where R represents hydrogen or methyl, with at least the stoichiometric amount with a thiol or thiolate of formula III

Method of manufacturing a (meth)acryloylthio compound

The invention relates to sulfur-containing polymethacrylates P produced by radical polymerization of monomers of formula I: ##STR1## where Y represents a C.sub.2-12 alkyl group, a C.sub.2-12 branched alkyl group, a C.sub.3-12 cyclic alkyl group, a C.sub.6-14 aryl group, or a C.sub.7-26 alkaryl group, wherein the carbon chains of Y may be interrupted by one or more ether or thioether groups; and

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Dieburg, Germany

Gerhard Schwinn