| abstract |
The present invention relates to foams containing cycloolefin copolymers. The foams according to the invention comprise 0.1 to 100% by weight of polymerized units derived from one or a plurality of polycyclic olefins having one or a plurality of norbornene units, based on the total weight of the cycloolefin copolymer, one of formula A Or one or more cycloolefin copolymers containing 0 to 99% by weight of polymerized units derived from a plurality of acyclic olefins and 0 to 99% by weight of polymerized units derived from one or a plurality of monocyclic olefins of the general formula (VIII) Include. The foam also includes voids that may contain one or a plurality of gaseous materials.n n n n n n n n n n Formula VIIIn n n n n n n n In the above formula,n n n R i , R ii , R iii and R iv are the same or different and are a hydrogen atom, a linear or branched saturated or unsaturated C 1 -C 20 hydrocarbon group or a C 6 -C 18 aryl group,n n n n is an integer from 2 to 10. |