The present invention is intended to provide a machine component composed of metal and rubber that results in no increase of material costs for an adhesive or increase of manufacturing costs for metal molding, causes no contamination of the metal mold or generates no foreign matter on the metal mold due to adhesion of the adhesive at the time of molding, causes no failure by separation of the adhesive from a fitting portion at the time of fitting the metal component, and is clean and favorable in appearance. A machine component 1 composed of metal and rubber is formed by applying a thermoset resin adhesive A to a surface of a metal component 2 of a predetermined shape, and vulcanizing and adhering a rubber 3 of a predetermined shape to part of the surface of the metal component 2 by metal molding.

Provided is a seal material having excellent non-adherence to metal surfaces. The seal material is formed of a cross-linked rubber that is obtained through cross-linking of a cross-linkable rubber composition containing a binary fluororubber, a carbon material, and a polyol cross-linker. The carbon material includes one or more carbon nanotubes. The cross-linked rubber has an adhesion strength of 2 N or less to a metal surface after being heated at 250? C. for 70 hours while in contact with the metal surface.

Provided is a composition for a gas seal member that can form a gas seal member capable of sufficiently suppressing both the occurrence of overflow fracture and the occurrence of blister fracture. The disclosed composition for a gas seal member is a composition for a gas seal member that contains an elastomer and a fibrous carbon nanostructure. The fibrous carbon nanostructure includes single-walled carbon nanotubes and the fibrous carbon nanostructure is contained in a proportion of at least 0.1 parts by mass and no greater than 12 parts by mass per 100 parts by mass of elastomer.

An uncrosslinked fluororubber composition contains a rubber component containing fluororubber as a main component, ionic liquid, and an organic resin filler other than perfluoro resin.

Described herein is a firestop system for marine or off-shore applications comprising a foam layer comprising at least one fire-stopping additive and a non-porous structural sealant layer.

To provide a crosslinkable composition containing a fluorinated copolymer, which is excellent in crosslinkability and gives a crosslinked product being capable of suppressing production of particles upon plasma irradiation, a crosslinked product obtained by crosslinking the composition, and a sealing material for a semiconductor production equipment, containing the crosslinked product.

A crosslinkable composition comprising; a copolymer (X) having an iodine atom and also having structural units based on tetrafluoroethylene and structural units based on propylene, wherein the content of structural units based on vinylidene fluoride is less than 0.1 mol % in all of the structural units; an organic peroxide; a crosslinking aid; and at least one member selected from the group consisting of a quaternary ammonium salt, a quaternary phosphonium salt and an organic amine, wherein the metal element content is less than 1 part by mass based on 100 parts by mass of the copolymer (X).

Methods, compositions, apparatuses, and systems are provided for a hybrid thermoplastic gel or sealant. The methods comprise providing (a) a base polymer having at least one functional group capable of crosslinking, (b) a functionalized extender, and (c) heat, and reacting the base polymer and functionalized extender in the presence of the heat to form the hybrid thermoplastic gel. The gel composition may comprise 5-40 wt % of a base polymer, 60-95 wt % of a functionalized extender, and 0-10 wt % of a crosslinker. A closure or interconnect system may comprise a housing, a cable, and a hybrid thermoplastic gel or sealant. A telecommunications apparatus may comprise a telecommunications component and a sealant that forms a seal with the telecommunications component. The sealant may comprise a sealant material having a first range of elongation followed by a second range of elongation.

The present application relates to a thermally expandable composition containing at least one peroxide cross-linking polymer, at least one peroxide, at least one polysaccharide and at least one endothermic, chemical blowing agent; as well as to shaped bodies containing said composition and to a method for sealing and filling voids in components, for strengthening or reinforcing components, in particular hollow components, and for bonding mobile components using shaped bodies of this type.

The present application relates to a thermally expandable composition containing at least one peroxide cross-linking polymer, at least one peroxide and at least one endothermic, chemical blowing agent, the blowing agent comprising at least one solid, optionally functionalized, polycarboxylic acid or the salt thereof and at least one urea derivative according to the formula (I) as defined herein; as well as shaped bodies containing the composition and to a method for sealing and filling voids in components, for strengthening or reinforcing components, in particular hollow components, and for bonding mobile components using shaped bodies of this type.

Curable sealant compositions having low temperature sealing ability improved over convention curable sealing compositions. The composition is flowable and can be cured to a cross linked form to provide cured reaction products that exhibit elastomeric properties. The curable elastomeric sealant composition can include a cross linkable elastomeric oligomer; an initiator or cross-linking agent; a glassy monomer and/or a rubbery monomer; and optionally one or more additives. Cured reaction products of the composition have a single Tg and retain a higher sealing force at low temperatures (but above the cured product Tg) as compared to a curable composition made from the same cross linkable elastomeric oligomer but without the glassy and/or rubbery monomer.