Thermally expandable formulations

摘要

The present specification relates to thermally expandable formulations comprising (a) at least one peroxidically crosslinkable binary copolymer comprising at least one monomer unit selected from vinyl acetate, (meth)acrylic acids and derivatives thereof, the binary copolymer having a melt flow index of not more than 3 g/10 min, as determined in accordance with DIN EN ISO 1133 and with a test load of 2.16 kg and a test temperature of 190° C., (b) at least one peroxide, (c) at least one chemical blowing agent, and (d) at least one polymer based on one or more diene monomers, and (e) at least one terpolymer based on at least one first monomer selected from singly or multiply unsaturated hydrocarbons, and on at least one second monomer selected from (meth)acrylic acids and derivatives thereof. The thermally expandable formulations exhibit a high level of persistence during the heating of the material as required for curing/expansion.

主权项

1. A thermally expandable composition, comprising:
(a) at least one peroxidically crosslinkable binary copolymer containing at least one monomer unit, selected from vinyl acetate, (meth)acrylic acids and derivatives thereof, wherein the binary copolymer has a melt flow index of no more than 3 g/10min, which is determined in accordance with DIN EN ISO 1133 with a test load of 2.16 kg and a test temperature of 190° C., (b) at least one peroxide, (c) at least one chemical blowing agent and (d) at least one polymer based on one or more diene monomers and (e) at least one terpolymer based on at least one first monomer selected from the mono-or polyunsaturated hydrocarbons, and at least one second monomer selected from the (meth)acrylic acids and derivatives thereof.