The Goodyear & Tire Rubber Company

The Firestone Tire & Rubber Company

Bridgestone Corporation

Bridgestone/firestone, Inc.

Shingo Futamura

Wen-Liang Hsu

Adel Farhan Halasa

Kuo-Chih Hua

Kenneth Allen Bates

Lawson G Wideman

Richard Michael D'Sidocky

David John Zanzig

Tristram W Bethea

Thomas Chester Bouton

Paul Harry Sandstrom

Barry A Matrana

Leh-Yeh Hsu, Legal Representative

William L Hergenrother

Edward John Blok

William M Cole

Bruce Raymond Hahn

Georg G Bohm

Ping Zhang

Aaron Scott Puhala

Mark L Stayer

David Charles Poling

Eric John Marazzi

Martin Paul Cohen

David Andrew Benko

Chad Aaron Jasiunas

Thierry Florent Materne

Robert A Hayes

Mark Leslie Kralevich, Jr

Cheryl Ann Losey

Arthur Allen Goldstein

Raymond Benjamin Roennau

Mario N Detrano

Ghislain Adolphe Thise

Rachel Rebekah Barnette

James Oral Hunt

Wendell R Conrad

Joe Zhou

James O Tveekrem

The invention relates to a tire having a tread of a cured rubber composition which contains dual silica moieties in a sense of containing both hydrophilic precipitated silica and in situ hydrophobated precipitated silica.

Tire with tread rubber composition which contains dual silica moieties

This invention relates to a precipitated silica reinforced conjugated diene-based elastomer composition containing an alkoxysilane coupled, in-chain functionalized, conjugated diene-based elastomer and to a tire having at least one component thereof. Said in-chain functionalized conjugated diene-based elastomer is a conjugated diene-based elastomer which contains a plurality of at least one of in-chain p- and m-(2-pyrrolidinoethyl) styrene (PES) and m-(2-pyrrolidino-1-methylethyl) alpha-methylstyrene (PAMS) groups.

Rubber composition containing an alkoxysilane coupled in-chain functionalized elastomer and tire with component thereof

The invention relates to a tire having a circumferential tread of a cap/base configuration composed of an outer tread rubber cap layer with a running surface of the tread and an underlying tread rubber base layer, wherein said tread cap layer is composed of two longitudinal adjacent zones, namely a primary tread cap zone and a minor lateral outboard control element (zone). The primary tread cap zone and the lateral outboard tread cap element provide a significant gradation of cold dynamic storage moduli (G') at &#x2212;25&#xb0; C. and hot tan delta values at 100&#xb0; C., yet similar warm dynamic storage moduli (G&#x2032;) at 60&#xb0; C. The primary tread cap zone and lateral outboard control tread cap element are load bearing in the sense of extending from the running surface of the tread radially inward to the unitary (non-zoned) tread base rubber layer. The zoned rubber tread cap layer and unitary rubber tread base layer are an integral tread composite in a sense of being co-extruded. In one aspect of the invention, the primary tread cap zone rubber composition is silica-rich and the lateral, outboard element rubber composition is carbon black-rich and which furthermore provide a gradation of filler reinforcement content; provide a gradation of silica to carbon black ratio and provide a gradation of cis 1,4-polybutadiene rubber content.

Tire with circumferential rubber tread having a lateral outboard control element

Rubbery polymers can be formed having the general formula:RRN&#x2014;(CH)&#x2014;X&#x2014;CH&#x2014;CHRRwherein Rand Rare independently selected from a group consisting of alkyls, cycloalkyls, alkenyls, cycloalkenyls, aryls, phenyls, heterocycles, acyls, and silanes, or Rin combination with Rforms a heterocyclic ring; n is an integer from 1 to 20; X is selected from a group consisting of sulfur, a phosphorus moiety, and a silicon moiety; Rand Rare one of hydrogen, alkyls, alkenyls, and at least one of which includes reactive unsaturation such as an alkenyl group. Moreover, this invention discloses a process of making functionalized rubbery polymers from the functionalized monomers.

Functionalized monomers and functionalized rubbery polymers made therewith

This invention relates to the preparation of silica-containing rubber compositions which contain precipitated silica reinforcement and use of an oligomeric organomercaptosilane coupling agent containing a plurality of mercapto and silane moieties, and a minimal content, if any, of ethoxy groups and is thus substantially free of ethoxy groups. The interaction of the plurality of mercapto moieties, or groups, of such oligomeric organomercaptosilane with the diene-based elastomer can promote a significant viscosity build up of the uncured rubber composition in a preliminary non-productive mixing stage and therefore present significant rubber processing difficulties during the mixing of the rubber composition. A challenge is therefore presented for reducing such viscosity buildup for such uncured silica-containing rubber composition.

Silica reinforced rubber composition and use in tires

This invention relates to the preparation of a cis 1,4-polyisoprene rubber-rich rubber composition containing precipitated silica which has been pre-treated with a fatty alcohol and/or epoxidized soybean oil together with an organosilane containing polysulfide coupling agent and to tires having at least one component comprised of such rubber composition. The invention particularly relates to a process of (a) preparing a natural rubber-rich rubber composition comprised of pre-treating precipitated silica aggregates prior to blending with, or in the presence of, dry natural rubber with a fatty alcohol and/or epoxidized soybean oil to the exclusion of sulfur curative for the natural rubber, mixing an organalkoxysiloxane based polysulfide coupling agent with said dry natural rubber coincidentally with or subsequent to said precipitated silica aggregate fatty alcohol and/or epoxidized soybean oil pre-treatment to form a composite thereof, to the exclusion of sulfur curative, followed by (b) mixing the resulting rubber mixture with sulfur curative and (c) curing the resulting rubber composition.

Preparation of silica reinforced polyisoprene-rich rubber composition and tire with component thereof

The invention relates to a tire having at least one component comprised of a rubber composition which contains a hydrophobated, pre-silanized silica, namely a pre-silanized silica hydrophobated with an epoxidized soybean oil and/or epoxidized rubber tree seed oil in situ within said rubber composition. Such tire component may be, for example although not limited to, a tire tread, sidewall and/or sidewall insert.

Tire with component comprised of rubber composition containing hydrophobated, pre-silanized silica

This invention discloses a process for synthesizing an amine functionalized monomer that comprises (1) reacting a secondary amine with a 2,3-dihalopropene to produce a vinyl halide containing secondary amine having a structural formula selected from the group consisting of wherein R and R' can be the same or different and represent allyl, alkoxyl or alkyl groups containing from 1 to about 10 carbon atoms, and wherein X represents a halogen atom, and wherein m represents an integer from 4 to about 10, and wherein X represents a halogen atom; and (2) reacting the vinyl halide containing secondary amine with a vinyl magnesium halide to produce the monomer having a structural wherein R and R&#x2032; can be the same or different and represent alkyl, allyl or alkoxyl groups containing from 1 to about 10 carbon atoms, and wherein m represents an integer from about 4 to about 10.

Tire with a tread comprising a rubbery polymer of a functionalized monomer

A simple method of handling thermomechanical coupling for temperature computation in a rolling tire. First, the sensitivity of the tire elastic response to changes in material stiffness is characterized using the 'deformation index'. Then, using a commercial finite element program and an appropriate user subroutine, heat generation is expressed as a function of the local temperature using a simple algebraic expression involving the temperature dependent material properties and the deformation indices. Temperatures are computed using the finite element program with the coupling information contained in the user subroutine. The result is a non-iterative method for a fully-coupled thermomechanical analysis of a tire. The effects of compound changes on tire temperature distribution can also be estimated using the deformation index. The method applies to the energy loss and temperature calculations under both steady-state and transient conditions.

Non-iterative method for a fully-coupled thermomechanical analysis of a tire and estimating effects of compound changes on tire temperature distribution using the deformation index

The present invention relates to rubber compounds containing aromatic ketone polysulfides of the formula:

Aromatic ketone polysulfides

Rubber compounds containing aromatic ketone polysulfides

Tire rubbers which are prepared by anionic polymerization are frequently coupled with a suitable coupling agent, such as a tin halide, to improve desired properties. It has been unexpectedly found that greatly improved properties for tire rubbers, such as lower hysteresis, can be attained by asymmetrically coupling the rubber. This invention more specifically discloses an asymmetrical tin-coupled rubbery polymer which is particularly valuable for use in manufacturing tire tread compounds, said asymmetrical tin-coupled rubbery polymer being comprised of a tin atom having at least three polydiene arms covalently bonded thereto, wherein at least one of said polydiene arms has a number average molecular weight of less than about 40,000, wherein at least one of said polydiene arms has a number average molecular weight of at least about 80,000, and wherein the ratio of the weight average molecular weight to the number average molecular weight of the asymmetrical tin-coupled rubbery polymer is within the range of about 2 to about 2.5.

Asymmetrical tin-coupled rubbery polymers, and method of making

This invention relates to a rubber composition composed of high Tg diene-based elastomers and which contains a high Tg liquid polymer of high vinyl polybutadiene and to such a composition being sulfur cured. The invention also relates to a tire having a tread of such rubber composition.

Rubber composition with liquid high Tg polymer and tire with tread thereof

A method is disclosed for processing a rubber composition comprising thermomechanically mixing at a rubber temperature in a range of 140.degree. C. to 190.degree. C. for a mixing time of 1 to 20 minutes

Rubber article containing sodium thiosulfate pentahydrate

The present invention relates to rubber compounds containing aromatic ketone polysulfides of the formula: ##STR1## wherein R is selected from the group consisting of alkyls having from 1 to 18 carbon atoms and x is an integer of from 2 to 8.

Growing community of inventors

Wadsworth, OH, United States of America

Shingo Futamura