The invention relates to vulcanizable compositions based on carboxylated nitrile rubbers, at least one resol crosslinker, at least one silicatic filler and at least one specific silane, to a process for preparing these vulcanizable compositions, to a process for producing vulcanizates therefrom and to the vulcanizates thus obtained. The vulcanizates feature good mechanical and dynamic properties and an excellent compression set.

A coating material capable of forming a film that is free of squeakiness and is less likely to suffer staining of clothing dye on the surface of a base such as a rubber molded article. The coating material contains fluororesin primary particles having an average particle size of 0.2 to 200 nm, a curable silicone resin in an amount of 0.1 to 250 mass % relative to the fluororesin primary particles, and water.

A dielectric film which has high electrical resistance and excellent durability and a process for producing the dielectric film are provided. Also provided is a transducer which has large displacement and excellent durability. The dielectric film includes a three-dimensional crosslinked body that is synthesized from an organic metal compound, a rubber polymer that is other than a polydimethyl siloxane and has a functional group that is reactive with the organic metal compound, and an inorganic filler that has a functional group that is reactive with the organic metal compound. The transducer is configured by interposing the dielectric film between at least a pair of electrodes. The dielectric film may be produced by preparing a first solution that contains a rubber polymer and an inorganic filler in a solvent that is capable of dissolving the rubber polymer and of chelating an organic metal compound, then preparing a second solution by mixing the organic metal compound into the first solution, and then removing the solvent from the second solution to allow a crosslinking reaction to proceed.

A stretchable insulating film may include a first insulating layer having stretchability and a second insulating layer on the first layer and having non-stretchability. The first insulating layer may include an elastomer and the second insulating layer may include a cyclic siloxane polymer framework. An electronic device may include the stretchable insulating film. A method of manufacturing the stretchable insulating film may include forming the first insulating layer and forming the second insulating layer. The forming the first insulating layer may include coating a composition including the elastomer or depositing the elastomer. The forming the second insulating layer may include injecting a cyclic siloxane monomer and an initiator on the first insulating layer into a reactor equipped with a heat source and performing a polymerization reaction by low-temperature vapor deposition.

Disclosed are thermoplastic vulcanizates comprising a plastic phase and a rubber phase and process for preparing such thermoplastic vulcanizates, wherein the plastic phase comprises a thermoplastic polymer and the rubber phase comprises a carboxylated nitrile rubber.