Abstract: A sulfur-curable rubber composition for incorporation into tires comprises, based on 100 parts by weight of elastomer (phr): (A) at least three diene elastomers each being a different rubber material, a first elastomer being characterized by a high molecular weight in a range of from about 300,000 to about 500,000 and a second elastomer being characterized by a molecular weight in the range of from about 250,000 to 350,000; the at least three elastomers each comprising between 25 and 40 phr; and (B) a reinforcement network comprising a balance of carbon black to silica in about a 3:1 to about 4:1 ratio.

Abstract: The invention relates to preparation of a rubber composition which contains polybutadiene elastomers with balanced reinforcing filler network, rubber composition prepared thereby and tire with at least one component comprised of such rubber composition.

Abstract: A method for making a compartmentalized sealant strip and barrier assembly 10 has the steps of co-extruding a barrier strip 9 of non-sealant elastomeric material with a plurality of projecting linear extending walls 9c and a sealant strip 11 wherein the sealant strip 11 is formed on one side of the barrier strip 9 filling the space between the plurality of projecting walls 9c to form a plurality of linearly extending rows of sealant 11 across the transverse width of the co-extrusion to form the compartmentalized sealant strip and barrier assembly 10. The step of co-extruding may further include the step of: forming the projecting walls 9c on an inclined angle relative to a plane perpendicular to the width of the assembly 10.

Abstract: The invention relates to preparation of a rubber composition which contains polybutadiene elastomers with balanced reinforcing filler network, rubber composition prepared thereby and tire with at least one component comprised of such rubber composition.

Abstract: This invention relates to a heavy duty tire (e.g. heavy duty truck tire) intended for significant load bearing capacity with a rubber tread of cap/base construction. The outer tread cap rubber layer is intended to be ground-contacting and the tread base rubber layer underlies the outer tread cap rubber layer to thereby provide an interface between the between the tread cap rubber layer and tire carcass. The elastomer of at least one of said tread cap rubber and tread base rubber layers layer is comprised of greater than 50 weight percent natural cis 1,4-polyisoprene rubber. The reinforcing filler for at least one of tread cap and tread base rubber layer contains oxidized rubber reinforcing carbon black.

Abstract: Pneumatic rubber tire intended for heavy duty service having a tread containing a combination of functionalized cis 1,4-polybutadiene rubber and reinforcing filler containing precipitated silica.

Abstract: There is disclosed a vulcanizable rubber composition comprising: (A) a diene based elastomer, (B) from 10 to 60 parts by weight, per 100 parts by weight of elastomer (phr), of an oxidized carbon black; and (C) from 0.1 to 0.5 phr of a polymeric amine comprising a primary amine functionality.

Abstract: A method for making a compartmentalized sealant strip and barrier assembly 10 has the steps of co-extruding a barrier strip 9 of non-sealant elastomeric material with a plurality of projecting linear extending walls 9c and a sealant strip 11 wherein the sealant strip 11 is formed on one side of the barrier strip 9 filling the space between the plurality of projecting walls 9c to form a plurality of linearly extending rows of sealant 11 across the transverse width of the co-extrusion to form the compartmentalized sealant strip and barrier assembly 10. The step of co-extruding may further include the step of: forming the projecting walls 9c on an inclined angle relative to a plane perpendicular to the width of the assembly 10.

Abstract: The invention relates to a phased rubber composition and tire tread thereof intended for heavy duty service such as for example a truck tire. The phased rubber composition is comprised of the product of blending a first rubber phase comprised of cis 1,4-polybutadiene rubber and reinforcing filler comprised of rubber reinforcing carbon black and a second rubber phase comprised of natural cis 1,4-polyisoprene rubber and reinforcing filler comprised of precipitated silica.

Abstract: A method for making a compartmentalized sealant strip and barrier assembly 10 has the steps of co-extruding a barrier strip 9 of non-sealant elastomeric material with a plurality of projecting linear extending walls 9c and a sealant strip 11 wherein the sealant strip 11 is formed on one side of the barrier strip 9 filling the space between the plurality of projecting walls 9c to form a plurality of linearly extending rows of sealant 11 across the transverse width of the co-extrusion to form the compartmentalized sealant strip and barrier assembly 10. The step of co-extruding may further include the step of: forming the projecting walls 9c on an inclined angle relative to a plane perpendicular to the width of the assembly 10.

Abstract: The invention relates to pneumatic tires with ribbed rubber treads which may be, for example pneumatic tires such as bus tires and truck tires. The rubber treads are comprised of a blend of specialized cis 1,4-polybutadiene rubber and cis 1,4-polyisoprene rubber containing reinforcing filler comprised of a combination of rubber reinforcing carbon black and precipitated silica together with silica coupler, wherein the tread rubber contains a cure package comprised of sulfur together with two sulfenamide primary sulfur cure accelerators.

Abstract: The invention relates to pneumatic tires having treads of a cap/base configuration where the outer tread cap rubber layer contains lugs with intervening grooves which extend to the running surface of the tread cap and wherein at least one of said grooves is contained in a rubber block within the tread. For this invention, the tread groove-containing rubber block joins the tire carcass and extends radially outward through the tread base rubber layer and into the outer tread cap rubber layer.

Abstract: Pneumatic rubber tire intended for heavy duty service having a tread containing a combination of functionalized cis 1,4-polybutadiene rubber and reinforcing filler containing precipitated silica.

Abstract: The invention relates to a phased rubber composition and tire tread thereof intended for heavy duty service such as for example a truck tire. The phased rubber composition is comprised of the product of blending a first rubber phase comprised of cis 1,4-polybutadiene rubber and reinforcing filler comprised of rubber reinforcing carbon black and a second rubber phase comprised of natural cis 1,4-polyisoprene rubber and reinforcing filler comprised of precipitated silica.

Abstract: The invention relates to a pneumatic rubber truck tire having a circumferential stratified dual cap rubber tread comprised of an outer tread cap and underlying tread sub cap. The underlying tread sub cap rubber layer is provided to support the outer tread cap rubber layer with similar physical properties. Both of the tread cap rubber compositions are comprised of a combination of natural cis 1,4-polyisoprene and dual cis 1,4-polybutadiene elastomers and contain reinforcing fillers comprised of precipitated silica and rubber reinforcing carbon black. The tread cap rubber compositions differ from each other by containing different levels of the individual cis 1,4-polybutadiene rubbers and by containing different rubber reinforcing carbon blacks and precipitated silica.

Abstract: This invention relates to heavy duty pneumatic rubber tires with treads intended for mixed service use on diverse surfaces and to rubber compositions for such tire tread.

Abstract: This invention relates to a tire which contains a pathway for transferring heat within a tire comprised of a heat transfer rubber conduit composed of at least one operational, physically functional, heat conductive tire component. In one embodiment, for a cured rubber tire, the heat transfer rubber conduit is provided as a pathway for transfer of heat generated within the tire to an external surface of the tire for dissipation of the conducted heat. In another embodiment, for an uncured rubber tire, the heat transfer rubber conduit is provided as a pathway to transfer heat applied to an outer surface of the tire to the interior of the tire. The heat conductive tire component(s) of the heat transfer conduit is/are each comprised of a heat conductive rubber composition containing acetylene carbon black.

Abstract: The invention relates to a pneumatic truck tire, particularly a bus tire, with a tread of a cap/base configuration comprised of a circumferential outer tread cap rubber layer and an underlying tread base rubber layer. The outer tread cap rubber layer is configured with lugs, particularly circumferential ribs with circumferential grooves between the ribs. A tread groove-containing rubber block tire component which joins the tread base rubber layer and extends radially outward into the outer tread cap rubber layer.

Abstract: The invention relates to pneumatic tires having treads of a cap/base configuration where the outer tread cap rubber layer contains lugs with intervening grooves which extend to the running surface of the tread cap and wherein at least one of said grooves is contained in a rubber block within the tread. For this invention, the tread groove-containing rubber block joins the tire carcass and extends radially outward through the tread base rubber layer and into the outer tread cap rubber layer.

Abstract: The invention relates to pneumatic tires having treads of a cap/base configuration where the outer tread cap rubber layer contains lugs with intervening grooves which extend to the running surface of the tread cap and wherein at least one of said grooves is contained in a rubber block within the tread. For this invention, the tread groove-containing rubber block is an extension of the tread base rubber layer which extends radially outward into the outer tread cap rubber layer.