Castable, curable composition for producing plastic molded articles

Castable, curable composition for producing plastic molded articles, comprising a sirup containing a proportion of acrylic acid monomer and/or derivatives thereof and a proportion of a further component containing one or more compounds of the formula (I):

• ##STR5## wherein R.sup.1 and R.sup.2 are the same or different and represent a hydrogen atom, a C.sub.1 -C.sub.6 alkyl group, an aryl group or jointly a cycloalkyl group, and the C.sub.1 -C.sub.6 alkyl group, the aryl group and the cycloalkyl group can be substituted once or several times with a halogen atom, a cyano group, an alkyl group, a hydroxyl group, a carbonyl group and/or a carboxyl group,
• wherein R.sub.3 and R.sub.4 are the same or different and
• a) represent an ethylenically unsaturated group of the formula (II)
• --R.sub.5 --R.sub.6 (II)
• wherein R.sub.5 represents a single bond, an ether group of the formula --(CR.sub.2.sup.7).sub.m --O-- (wherein R.sup.7 means hydrogen or alkyl and m an integer from 1 to 10) or a polyether group of the formula --(CH.sub.2 --CH.sub.2 --O).sub.n -- or --(CH.sub.2 --CH.sub.2 --CH.sub.2 --O).sub.n --, and n is an integer from 1 to 6 and, wherein R.sup.6 represents an at least mono-unsaturated alkylene group with two or more C atoms, an acrylate group or a methacrylate group;
• and/or
• b) represent a group of the formula (III):
• ##STR6## wherein R.sup.8 and R.sup.9 are defined like R.sup.1 and R.sup.2, but independently thereof, and l is an integer from 1 to 10,000, and R.sup.8 and R.sup.9 can have varying meanings at l>1 in the formula (III),
• and/or
• c) represent hydrogen, and at the most one of the residues R.sup.3 and R.sup.4 is a hydrogen atom,
• and the sirup optionally including a proportion of a prepolymer, in particular polymethyl methacrylate (PMMA),
• and, in addition, containing a particulate, inorganic filler with a proportion of approximately 50 to 90% by weight in relation to the total composition, pigments and a radical initiator system, the viscosity of the total composition being .ltoreq.80 Pa.multidot.s, and the ratio of the sum of the weight content of acrylic acid monomer and its monomeric derivatives to the sum of the weight content of the further component and the weight content of prepolymer being 99:1 to 30:70, and, in the presence of prepolymer, the ratio of the weight content of the further component to the weight content of the prepolymer being at least 5:95.