Polyether block amide-poly(meth)acrylate foams

A foamable mixture, comprising:

• a) at least one amino-regulated polyether block amide (PEBA),
• b) at least one poly(meth)acrylate selected from the group consisting of poly(meth)acrylimides, polyalkyl(meth)acrylates, and mixtures thereof, and
• a physical blowing agent,
• wherein the mass ratio of the at least one amino-regulated PEBA to the at least one poly(meth)acrylate is in the range from 95:5 to 60:40,
• the polyalkyl(meth)acrylate, if present, contains 80% by weight to 99% by weight of methyl methacrylate (MMA) units and 1% by weight to 20% by weight of C1-C10-alkyl acrylate units, based on the total weight of the polyalkyl(meth)acrylates,
• the poly(meth)acrylimides, if present, comprise the following groups:
• a′) an N-alkylacrylimide of formula (IV)
• wherein R1 and R2 are the same or different, and are hydrogen or a methyl group, and R3 is hydrogen, an alkyl radical having 1 to 20 carbon atoms, or an aryl radical having 3 to 20 carbon atoms,
• b) a (meth)acrylic acid,
• c) a (meth)acrylic anhydride, and
• d) a (meth)acrylate,
• wherein groups a′) to d′) are each present to an extent of at least 1% by weight, based on a total weight of the poly(meth)acrylimides,
• the poly(meth)acrylimides do not contain further monomers;
• and
• a foam molding produced therefrom has a density of not more than 350 kg/m3.