Curable Elastomer Compositions
AssigneeDow Corning Corporation
InventorsRobert Moore, Michael Proctor
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Abstract
A formable curable elastomer composition comprising a dispersion of a cured organic elastomer, such as EPDM, butyl rubber and hydrogenated nitrile butyl rubber, is provided in an uncured silicone elastomer. The organic elastomer is cured by a phenol-formaldehyde resin. These compositions can generally be used in applications where silicone rubber is used, and in particular where the cured rubber is liable to be exposed to temperatures of 150-200° C. Examples of such uses include tyre bladders used in the moulding of tyres, spark plug boots for internal combustion engines, wire and cable coatings designed to be used at high temperatures and ceramifiable wire and cable coatings used in safety critical applications such as emergency lighting systems.
Claims21
A formable curable elastomer composition comprising a dispersion of a cured organic elastomer in an uncured silicone elastomer, wherein the organic elastomer is cured by a phenol-formaldehyde resin.
A formable curable elastomer composition comprising a dispersion of a curable elastomer compound in an uncured silicone elastomer free of curing agent, wherein the curable elastomer compound comprises an organic elastomer and a phenol-formaldehyde resin curing agent capable of curing the organic elastomer.
An elastomer composition comprising a dispersion of a cured organic elastomer in a cured silicone elastomer, wherein the organic elastomer is cured by a phenol-formaldehyde resin.
A process for the preparation of a formable curable elastomer composition comprising dispersing a curable elastomer compound in an uncured silicone elastomer free of curing agent and heating the composition to cure the elastomer compound, wherein the curable elastomer compound comprises an organic elastomer and a phenol-formaldehyde resin curing agent capable of curing the organic elastomer.
An EPDM or HNBR elastomer in an environment in which the elastomer is subjected to temperatures of at least 150° C., characterised in that the EPDM or HNBR elastomer is cured by a phenol-formaldehyde resin to enhance the thermal stability of the EPDM or HNBR elastomer.
Dependencies are inferred from the claim text.