A new modified elastomer having a phenolic hydroxyl group on the side chain, which is excellent in physical properties, crosslinkability, thermal stability, tackiness, adhesiveness and compatibility, is obtained by copolymerizing at least one monomer selected from the group consisting of conjugated dienes, and monoethylenically unsaturated monomers, or graft-copolymerizing an elastomer prepared by polymerizing at least one monomer defined above, with a phenolic monomer represented by the general...

A new modified elastomer having a phenolic hydroxyl group on the side chain, which is excellent in physical properties, crosslinkability, thermal stability, tackiness, adhesiveness and compatibility, is obtained by copolymerizing at least one monomer selected from the group consisting of conjugated dienes, and mono-ethylenically unsaturated monomers, or graft-copolymerizing an elastomer prepared by polymerizing at least one monomer defined above, with a phenolic monomer represented by the genera...

A modified elastomer having a phenolic hydroxyl group on the side chain which is excellent in tackiness and in compatibility with other elastomers, characterized in that the elastomer is obtained by graft-copolymerizing an elastomer, prepared by copolymerizing ethylene with at least one .alpha.-olefin represented by the general formula R'--CH=CH.sub.2, wherein R' is an alkyl group, and at least one non-conjugated diene or polyene, with at least one phenolic monomer represented by the general for...

A silicone elastomer that flows like a fluid under high pressure is described. It is made by heating a silicone fluid, having a molecular weight close to 60,000 and containing approximately 0.45 mole percent of methylvinylsiloxane units, with a vinyl-specific peroxide. This elastomer is characterized by a combination of a high cross-link density and a high proportion of free chain ends. It crumbles to a powder under high shear stress, but has the unique property of flowing like a viscous fluid t...

A polychloroprene elastomer prepared by blending a toluene insoluble gel polymer, obtained by polymerizing chloroprene or a mixture of chloroprene with at least one copolymerizable monomer, with a toluene soluble sol polymer obtained by polymerizing chloroprene or a mixture of chloroprene with at least one copolymerizable monomer, wherein the cross-linking density of the elastomer is at least 2.4 .times. 10.sup.-.sup.6.

An elastomer joint, in particular for chassis parts of motor vehicles, comprising a housing (6), an elastomer body (2) arranged in the housing (6), and a joint body (1) that is arranged in the elastomer body (2), is characterized in that the housing (6) has a cylindrical inner wall, and a spacer (4) is provided that is arranged at an axial end of the elastomer body (2) between the latter and the inner wall.

Elastomer composites and elastomer blends comprising particulate fillers having selected structure and surface area values are disclosed as well as elastomer composites and elastomer blends having improved properties. Methods of making and using elastomer composites and elastomer blends are also disclosed.

To provide an elastomer molded article for a semiconductor manufacturing equipment which not only has cleanliness required but also has an excellent plasma resistance and an excellent property of metal-elution inhibition. The elastomer molded article is obtained by crosslinking a crosslinkable elastomer composition comprising a crosslinkable elastomer component and a carbon black filler having an average particle size of not more than 700 .mu.m and an impurity metal content measured by an ashing...

An elastomer composition obtained by crosslinking 1-99 parts by weight of a crosslinkable rubber-like polymer (A) and 1-99 parts by weight of a polypropylene resin (B) [the total amount of (A) and (B) being 100 parts by weight], where (B) is a crosslinking type polypropylene resin, has a flexural modulus of 100-10000 kgf/cm.sup.2 as specified in JIS K6758 and has a melting point peak in the range of 100-150.degree. C. in differential scanning calorimetry (DSC), the melting point peak calorie bei...

An elastomer composition including an elastomer having a functional group, and a compound having a functional group, in which corresponding functional groups form a cross-link by at least one of an ionic bond, a hydrogen bond, and Diels-Alder reaction with temperatures, i.e., by heating, while the cross-link is cleaved at around room temperature, forming and cleaving of the cross-link being reversible.