Abstract: Disclosed is a method for forming a gasket seal or transition fitting affixed to one of two parts to be joined in a gasketed joint by use of the gasket. The method includes the step of providing a mold having a walled mold cavity of the shape desired for the gasket, at least one wall of the mold cavity being a junction surface of the one part and the remaining walls of the mold cavity being formed in a mold piece. The mold is closed by placing the mold piece over the junction surface of the one part to establish the mold cavity as a closed generally toroidal volume. Then a molten gasket-forming thermoplastic material is injected into the mold cavity to form the gasket, the thermoplastic material including a bonding agent for establishing an adhesive bond between the junction surface and the gasket. The thermoplastic material is cooled to solidify the gasket and affix it to the junction surface and the mold piece is removed away from the junction surface.

Abstract: Disclosed is a method for forming a gasket seal or transition fitting affixed to one of two parts to be joined in a gasketed joint by use of the gasket. The method includes the step of providing a mold having a walled mold cavity of the shape desired for the gasket, at least one wall of the mold cavity being a junction surface of the one part and the remaining walls of the mold cavity being formed in a mold piece. The mold is closed by placing the mold piece over the junction surface of the one part to establish the mold cavity as a closed generally toroidal volume. Then a molten gasket-forming thermoplastic material is injected into the mold cavity to form the gasket, the thermoplastic material including a bonding agent for establishing an adhesive bond between the junction surface and the gasket. The thermoplastic material is cooled to solidify the gasket and affix it to the junction surface and the mold piece is removed away from the junction surface.

Abstract: Elastomer compositions suitable for use in foaming operations and elastomeric cellular products and processes of forming such products. The elastomer compositions comprise a mixture of two thermoplastic rubber compounds, at least one of which has a vinyl aromatic component and a higher aromaticity than the other rubber compound. The compositions also contains a nucleating agent which functions when gas is entrained in the molten elastomer formulation to enhance the neutrophilic structure of the elastomer. An unstable resin is also present in the elastomer compositions. This resin is oxidized or thermally decomposed as the foamed product is cured to produce a relatively nontactified skin. Cellular elastomeric products may be formed by incorporating an inert gas into the molten elastomer compositions by the use of gas infusing equipment or by the decomposition of blowing agents. The blowing agents may be supplied to the molten elastomer compositions entrained within a plasticizing oil.

Abstract: Elastomer compositions suitable for use in foaming operations and elastomeric cellular products and processes of forming such products. The elastomer compositions comprise a mixture of two thermoplastic rubber compounds, at least one of which has a vinyl aromatic component and a higher aromaticity than the other rubber compound. The compositions also contains a nucleating agent which functions when gas is entrained in the molten elastomer formulation to enhance the neutrophilic structure of the elastomer. An unstable resin is also present in the elastomer compositions. This resin is oxidized or thermally decomposed as the foamed product is cured to produce a relatively nontactified skin. Cellular elastomeric products may be formed by incorporating an inert gas into the molten elastomer compositions by the use of gas infusing equipment or by the decomposition of blowing agents. The blowing agents may be supplied to the molten elastomer composition entrained within a plasticizing oil.