The Goodyear & Tire Rubber Company

Other

Construction Research & Technology Gmbh

Michael Lester Kerns

Steven Kristofer Henning

Michael Joseph Rachita

Stephan Rodewald

Scott M Christian

Zhengfang Xu

Daniel Edward Bowen, Iii

Bruce J Christensen

Edward Lee Johnson

Paul Harry Sandstrom

Adel Farhan Halasa

Wen-Liang Hsu

Bruce Raymond Hahn

Marc Weydert

Georges Marcel Victor Thielen

Kenneth Floyd Castner

George Jim Papakonstantopoulos

Tang Hong Wong

Michael Paul Mallamaci

Karen Karas Burke

Craig William Burkhart

Gamil Gamal Attareb

Ahalya Ramanathan

The production of a protein free synthetic polyisoprene which has both low levels of chemical impurities and good physical properties has yet to be realized. It has now been envisioned that the use of neodymium catalyzed polyisoprene will offer the combined advantages of both a clean, as well as, high cis-1,4 polymer. Synthesis of polyisoprene rubber using a neodymium based catalyst system is described. Characterization of the material shows the absence of an ultra high molecular weight fraction and the presence of very high cis-1,4-microstructure. Gum stock and black filled compound studies comparing neodymium polyisoprene with natural rubber, titanium polyisoprene, and lithium polyisoprene have been performed. Results indicate that polyisoprene rubber synthesized using a neodymium catalyst system (Nd&#x2014;PI) has similar stress-strain and tear properties as synthetic titanium polyisoprene. Analysis of residual volatile, extractable, and oligomer levels indicates Nd&#x2014;PI is indeed a clean source of high cis synthetic polyisoprene.

Polyisoprene rubber breast hood

The invention relates to a rubber compositions containing a specialized styrene/butadiene elastomer with molecular weight profile containing a limited low molecular weight content and precipitated silica reinforcement and tire with at least one component, such as for example a tread, comprised of such rubber composition.

Rubber composition containing specialized styrene/butadiene elastomer and precipitated silica reinforcement and tire with component

This invention relates to vegetable oil extended rubber containing soy oil and tire with a component of such oil extended rubber.

Triglyceride containing solution polymerization prepared styrene/butadiene elastomer and tire with component

The production of a protein free synthetic polyisoprene which has both low levels of chemical impurities and good physical properties has yet to be realized. It has now been envisioned that the use of neodymium catalyzed polyisoprene will offer the combined advantages of both a clean, as well as, high cis-1,4 polymer. Synthesis of polyisoprene rubber using a neodymium based catalyst system is described. Characterization of the material shows the absence of an ultra high molecular weight fraction and the presence of very high cis-1,4-microstructure. Gum stock and black filled compound studies comparing neodymium polyisoprene with natural rubber, titanium polyisoprene, and lithium polyisoprene have been performed. Results indicate that polyisoprene rubber synthesized using a neodymium catalyst system (Nd&#x2014;PI) has similar stress-strain and tear properties as synthetic titanium polyisoprene. Analysis of residual volatile, extractable, and oligomer levels indicates Nd&#x2014;PI is indeed a clean source of high cis synthetic polyisoprene. In the practice of this invention such Nd&#x2014;PI is used in manufacturing articles used in manufacturing health care products, garments, clothing, and food and beverage packaging. Some specific applications include: bandages, drug delivery patches, suture tape, pharmaceutical closures, including syringe plungers and sleeves, vial closures and stoppers, tourniquets, exercise bands, condoms and prophylactic devices, gloves and glove dip, intervenous bags and tubing, baby bottle nipples, pacifiers, and teething devices, breast hoods, and dental and orthodontic devices.

Rubber for baby bottle nipples, pacifiers, and syringe plungers

The production of a protein free synthetic polyisoprene which has both low levels of chemical impurities and good physical properties has yet to be realized. It has now been envisioned that the use of neodymium catalyzed polyisoprene will offer the combined advantages of both a clean, as well as, high cis-1,4 polymer. Synthesis of polyisoprene rubber using a neodymium based catalyst system is described.

An improved freeze-thaw durability cementitious composition is provided that uses at least partially degradable polymeric particles that are blended directly into the cementitious composition mixture. The degradable polymeric particles provide void spaces in the cementitious material matrix, and such void spaces act to increase freeze-thaw durability of the cementitious material.

Providing freezing and thawing resistance to cementitious compositions

The present invention discloses a navigation system for communicating narrative information to a traveler moving through a geographic region. The present invention more specifically discloses a navigation system comprising: a position determining device; a means for associating each of a plurality of narrations with each of a plurality of locations within the geographic region, wherein each of the plurality of narrations relate to each of a plurality of points of interest within the geographic region; a means for associating each of a plurality of alerts with each of the plurality of locations within the geographic region; a means for communicating alerts to the traveler as the traveler freely moves throughout the geographic region, wherein the alerts are communicated when the traveler moves within a specified proximity to the locations associated with the alerts, and wherein the alerts provide the traveler with a means for receiving information with respect to the general nature of the point of interest associated with the location; and a means for providing the traveler with the narration associated with the point of interest associated with the location.

Method of providing narrative information to a traveler

This invention is based upon the discovery that rubbery polymers having a high vinyl content and a low degree of branching can be synthesized with an initiator system that is comprised of (a) a lithium initiator selected from the group consisting of allylic lithium compounds and benzylic lithium compounds, (b) a Group I metal alkoxide, and (c) a polar modifier; wherein the molar ratio of the Group I metal alkoxide to the polar modifier is within the range of about 0.1:1 to about 10:1; and wherein the molar ratio of the Group I metal alkoxide to the lithium initiator is within the range of about 0.01:1 to about 20:1. These high vinyl polymers offer reduced levels of hysteresis and better functionalization efficiency.

Synthesis of functionalized high vinyl rubber

This invention is based upon the discovery that rubbery polymers having a high vinyl content and a low degree of branching can be synthesized with an initiator system that is comprised of (a) a lithium initiator selected from the group consisting of allylic lithium compounds and benzylic lithium compounds, (b) a Group I metal alkoxide, and (c) a polar modifier; wherein the molar ratio of the Group I metal alkoxide to the polar modifier is within the range of about 0.1:1 to about 10:1; and wherein the molar ratio of the Group I metal alkoxide to the lithium initiator is within the range of about 0.01:1 to about 20:1. These high vinyl polymers offer reduced levels of hysteresis and better functionalization efficiency. By virtue of their lower level of hysteresis these polymers can be utilized in manufacturing tire tread compounds that exhibit lower levels of rolling resistance and can accordingly be used to improve the fuel economy of motor vehicles without compromising other desirable characteristics, such as traction and tread-wear.

The invention is directed to an oil extended rubber and composition comprising: a solution-polymerized elastomer derived from at least one conjugated diene monomer and at least one vinyl aromatic monomer, the elastomer coupled with at least one metal selected from the group consisting of silicon and tin; and from about 5 to about 70 parts by weight, per 100 parts by weight of elastomer (phr), of a process oil having a glass transition temperature of from about &#x2212;80&#xb0; C. to about &#x2212;40&#xb0; C., a polycyclic aromatic content of less than 3 percent by weight as determined by the IP346 method, and an aromatic content of less than 20 percent by weight as measured by ASTM D2140.

Oil extended rubber and composition containing low PCA oil

The invention is directed to an oil extended rubber and composition comprising: a solution polymerized elastomer derived from isoprene and optionally at least member of the group consisting of conjugated dienes and vinyl aromatic monomers; and from about 5 to about 70 parts by weight, per 100 parts by weight of elastomer (phr), of a process oil having a glass transition temperature of from about &#x2212;80&#xb0; C. to about &#x2212;40&#xb0; C. and a polycyclic aromatic content of less than 3 percent by weight as determined by the IP346 method.

The present invention discloses a baby bottle nipple, comprising a fastener including a sealing surface adapted to be fastened on a baby bottle, and a wall adapted to be contacted with a baby's mouth, the wall having at least one opening to allow milk to pass through, the wall including a nipple portion with the opening being provided in the nipple portion, wherein the wall is comprised of polyisoprene rubber made with a neodymium catalyst.

Rubber for baby bottle nipples, pacifiers, & syringe plungers

The subject invention reveals a navigation system comprising: a position determining device; a means for associating each of a plurality of narrations with each of a plurality of locations, wherein each of the plurality of narrations relate to each of a plurality of points of interest; a means for associating each of a plurality of alert with each of the plurality of locations; a means for communicating alerts to the traveler as the traveler freely moves, wherein the alerts are communicated when the traveler moves within a specified proximity to the locations associated with the alerts, and wherein the alerts advise the traveler with respect to the point of interest; a means for providing the traveler with the option of obtaining directions to the point of interest; and a means for providing the traveler with the option of hearing the narration reading the point of interest.

Method and system for providing narrative information to a traveler

It has been unexpectedly discovered that cis-1,4-polybutadiene that is synthesized utilizing Zeigler-Natta catalyst systems has superior characteristics for utilization in solid golf ball cores if the polymerization is terminated utilizing a carboxylic acid of the structural formula RCOOH, wherein R represents an alkyl group containing from 1 to about 30 carbon atoms.

Growing community of inventors

Medina, OH, United States of America

Michael Lester Kerns