Abstract:
A rubber material is described, provided with a barrier material in the form of a copolymer preparable by ring-opening metathesis polymerization of a) at least one olefin monomer selected from the group consisting of monocyclic olefin monomers having one or two endocyclic C-C double bonds and bicyclic olefin monomers having one endocyclic C-C double bond, and b) at least one polycyclic olefin monomer having at least two C-C double bonds. The barrier material can be used to reduce the gas permeability of the rubber material.
Abstract:
A barrier coating, wherein a polymer layer having a thickness of at least 1 μm is applied to a support substrate selected from among polymer films, paper and paperboard and the polymer layer is composed of a copolymer which can be produced by ring-opening metathesis polymerization of (a) olefin monomers selected from among monocyclic olefin monomers having one or two endocyclic C-C double bonds and bicyclic olefin monomers having an endocyclic C‑C double bond and (b) polycyclic olefin monomers having at least two C-C double bonds, e.g. a copolymer of cyclooctene and dicyclopentadiene, is described.
Abstract:
The use of a certain copolymer is described for reducing the gas-permeability of rubber material. A rubber material provided with a barrier material in the form of the copolymer is also described. The copolymer can be produced via ring-opening metathesis polymerization of a) one first olefin monomer selected from the group consisting of cyclic olefin monomers having at least one endocyclic C-C double bond, where no tertiary carbon atom bearing a hydrogen atom is present in alpha-position to the double bond, and b) one second olefin monomer selected from the group consisting of cyclic olefin monomers having one endocyclic C-C double bond, where a tertiary carbon atom bearing a hydrogen atom is present in at least one alpha-position to the double bond, where the copolymer has been oxidized at least to some extent, where the amount of polycyclic olefin monomers used to produce the copolymer with at least two C-C double bonds is zero or less than 1 mol%, based on the entirety of the monomers.
Abstract:
The invention relates to a method for producing aqueous polymer dispersions using water-soluble metal carbenes, to aqueous polymer dispersions that can be obtained according to said method, to polymer powders obtained from said dispersions and to the use thereof.