Plastic moldings made of water-expanded polymer resin

Plastic molding made of a water-expanded polymer resin and produced from a curable mixture containing a water component emulsified by an emulsifier component in a resin-forming component, said resin-forming component of said curable mixture containing a monomer component and a cross-linker on an acrylate basis and/or an acrylate prepolymer, and the weight ratio of said water component to said resin-forming component being at least 1:1 wherein the emulsifier component comprises a first and/or a second polymeric, non-ionic surfactant, each one having an HLB value of from 3 to 7, whereby the first polymeric, non-ionic surfactant is represented by the formula (I):

• X--Y (I)
• wherein X represents a C.sub.6 -C.sub.80 alkyl group or a C.sub.6 -C.sub.80 alkylene group and Y represents a hydrophilic moiety comprising an ester residue derived from a carboxylic or dicarboxylic acid or derivatives thereof and whereby the second polymeric, non-ionic surfactant is represented by the formula (II):
• B.sup.1 --A--B.sup.2 (II)
• wherein A represents a hydrophilic backbone selected from the group consisting of
• polyether moieties obtained by a condensation reaction of sorbit and/or sorbitol with glycerol,
• polyalkyleneoxides,
• polysiloxane moieties, and
• polyacrylate moieties
• and wherein B represents a hydrophilic sidechain selected from the group consisting of
• C.sub.5 -C.sub.22 fatty acids,
• C.sub.5 -C.sub.22 hydroxy fatty acids, poly(hydroxy fatty acids),
• C.sub.5 -C.sub.22 alkyl groups,
• C.sub.5 -C.sub.22 alkoxy groups,
• polyalkylene oxides, and
• polyethers comprising alkylene oxide units and
• bearing on its free ends C.sub.5 -C.sub.22 alkyl residues.