| 摘要 |
The present invention relates to foams comprising cycloolefin copolymer s. The foam of the invention comprises at least one cycloolefin copolymer whi ch comprises from 0.1 to 100% by weight, based on the total mass of the cycloolefin copolymer, of polymerized units derived from one or more polycyclic olefins having one or more norbornene units and from 0 to 99% by weight, based on the total mass of the cycloolefin copolymer, of polymerized units derived from one or more acyclic olefins of the formula <IMG> where R', R", R"' and R"' are identical or different and are each a hydrogen atom, a linear, branched, saturated or unsaturated C1-C20-hydrocarbon radical or a C6-C18-aryl radical and from 0 to 99% by weight, based on the total mass of the cycloolefin copolymer, of polymerized units of one or more monocyclic olefins of the formula VIII <IMG> where n is a number from 2 to 10, and voids which can contain one or more gaseous substances.
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