Pumpable, thermally curable and expandable preparations

A thermally expandable preparation which can be pumped at application temperatures in a range of 50° C. to 120° C., and contains, in each case based on a total weight of the preparation:

• (a) 3 to 40 wt. % of at least one polymer, optionally comprising a peroxidically crosslinkable polymer, the at least one polymer being selected from:
• (a1) binary copolymers containing at least one monomer unit selected from vinyl acetate, (meth)acrylic acids, styrene and derivatives thereof, and
• (a2) terpolymers based on at least one first monomer selected from monounsaturated or polyunsaturated hydrocarbons, and at least one second monomer selected from (meth)acrylic acids and derivatives thereof, and at least one third monomer selected from epoxy-functionalized meth(acrylates);
• and combinations of (a1) and (a2);
• (b) 1 to 40 wt. % of at least one liquid polymer selected from:
• (b1) liquid hydrocarbon resins;
• (b2) liquid polyolefins;
• and
• (b3) liquid polymers based on one or more diene monomers;
• (c) 0.1 to 6 wt. % of at least one peroxide;
• (d) 0.1 to 20 wt. % of at least one thermally activatable blowing agent;
• (e) 1 to 12 wt. % of at least one adhesion promoter, selected from pre-crosslinked rubbers;
• and
• (f) 0 to 6 wt. % of at least one co-crosslinking agent selected from multifunctional (meth)acrylates.