Abstract: Compositions containing a radical-polymerizable olefinically unsaturated compound and a hydrazone of an aromatic aldehyde or ketone are provided. Also provided are methods for the production of such compositions and methods for the use of such compositions as an adhesive and sealing compound or its use for the coating and production of plastic moldings. The compositions polymerize radically at room temperature upon exposure to ambient air.

Abstract: Adhesives containing some bifunctional and some at least trifunctional epoxide compounds, photoinitiators, and acrylates of methacrylates corresponding to general formulaCH.sub.2 =C(R.sup.1)-CO-(OC.sub.m H.sub.2m).sub.n -OR.sup.2in which R.sup.1 is hydrogen or methyl and R.sup.2 is a hydrocarbon radical containing a cationically cleavable oxacycloalkyl or oxacycloalkenyl group, continue to harden in darkness after their hardening has been photoinitiated, and thus can produce strong bonds between opaque substrates, when the substrates are coated with the adhesives, the adhesive coatings are exposed to light to initiate the hardening, and the coated substrates are pressed together within a short interval before the hardening of the photoinitiated adhesives advances to the gel point.

Abstract: Monomer compositions crosslinkable by photoinitiators and stabilizers and containing liquid polymerizable monomers having one or more ethylenic double bonds, camphor quinone, an aryl sulfinate, thickeners, and, optionally, adhesion promoters and/or accelerators as photoinitiated adhesives hardening in darkness for the bonding of non-transparent surfaces. Bonds having excellent tensile shear strengths are obtained.