1
Roy M Freeman, William L Hergenrother, Frederick J Ravagnani: High modulus low hysteresis rubber compound for pneumatic tires. Bridgestone Corporation, Daniel N Hall, February 27, 1996: US05494091 (104 worldwide citation)

A sulfur-vulcanizable rubber compound, being devoid of peroxide components, having high modulus and low hysteresis properties subsequent to vulcanization. Such compounds comprise from about 25 to 55 parts by weight of polyisoprene; and from about 75 to 45 parts by weight of a diene polymer selected ...


2
William L Hergenrother, Mark G Matlock, Richard J Ambrose: Impact resistant polymeric compositions containing polyamides, maleic anhydride adducts of hydrogenated polymers and graft copolymers thereof. The Firestone Tire & Rubber Company, Frank J Troy Sr, January 24, 1984: US04427828 (80 worldwide citation)

Polymeric compositions having resistance to impact comprising (a) from about 50 to about 90 percent by weight of a polyamide having a number average molecular weight of at least 10,000 and (b) from about 10 to about 50 percent by weight of a maleic anhydride adduct of a hydrogenated polymer of one o ...


3
William L Hergenrother, Tristram W Bethea, John M Doshak: Tin containing elastomers and products having reduced hysteresis properties. Bridgestone Firestone, Daniel N Hall, December 7, 1993: US05268439 (55 worldwide citation)

An anionic polymerization initiator comprising the reaction product of a an organatin halide and lithium in a suitable solvent. Elastomeric polymers prepared with these initiators have tin containing functional groups on substantially every polymer chain and provide vulcanizable rubber compounds exh ...


4
William L Hergenrother, Thomas J Lynch: Amine-initiated elastomers having hysteresis reducing interaction with silica. Bridgestone Corporation, Daniel N Hall, June 29, 1999: US05916961 (46 worldwide citation)

The reduction of hysteresis in a silica-filled, vulcanized elastomeric compound is produced by mixing diene monomer and optionally monovinyl aromatic monomer with a lithium amine initiator and, optionally, a modifier; effecting polymerization conditions; terminating polymerization with an amino grou ...


5
David F Lawson, William L Hergenrother, Michael L Kerns: Polymers, elastomeric compounds and products thereof, derived from novel amine compounds containing side-chain organolithium moieties. Bridgestone Corporation, Daniel N Hall, July 28, 1998: US05786441 (46 worldwide citation)

A functionalized polymer comprising a polymeric segment, having at least one cyclic amine end group, defined according to formula (I) ##STR1## where Z is an anionically-polymerized polymer; R.sub.1 is selected from the group consisting of organic groups containing from 1 to about 12 carbon atoms and ...


6
William L Hergenrother, John M Doshak: Method of preparing an anionic polymerization initiator. Bridgestone Corporation, Daniel N Hall, August 24, 1993: US05238893 (40 worldwide citation)

A vulcanizable elastomeric compound and products such as pneumatic tires and the like, are formed from a functionalized polymer having a functional group derived from the polymerization initiator. The polymerization initiator is selected from the group consisting of ##STR1## where R.sup.1 and R.sup. ...


7
William L Hergenrother, William M Cole, Theodore J Knutson, Georg G A Bohm: Anionic polymerization initiators for preparing macro-branched diene rubbers. Bridgestone Corporation, John H Hornickel, Barbara E Arndt, October 24, 2000: US06136914 (40 worldwide citation)

Novel solid supported anionic polymerization initiators that are multiply metalated with Group IA alkali metal atoms are provided and employed to produce extremely high molecular weight branched diene polymers. The initiators are prepared by metalating a particle comprising a thermoplastic polymer o ...


8
David F Lawson, Hideo Takeichi, William L Hergenrother, Thomas J Lynch, James Oziomek: Composition of cyclic amine-initiated elastomers and amorphous silica and process for the production thereof. Bridgestone Corporation, D A Thomas, February 2, 1999: US05866650 (38 worldwide citation)

The reduction of hysteresis in a silica-filled, vulcanized elastomeric compound is produced by mixing diene monomer and optionally monovinyl aromatic monomer with a lithium amine initiator and, optionally, a modifier; effecting polymerization conditions; terminating polymerization with an amino grou ...


9
Chen Chy Lin, William L Hergenrother: Metal hydroxide filled rubber compositions and tire components. Bridgestone Corporation, Arthur M Reginelli, Meredith E Palmer, August 10, 2004: US06774185 (34 worldwide citation)

A tire component formed by a process comprising the steps of (A) vulcanizing a rubber composition comprising, (1) a rubber, (2) a modified polyolefin additive, (3) an aluminum hydroxide filler, and (4) a rubber vulcanizing agent.


10
Chenchy Jeffrey Lin, William L Hergenrother, Ashley S Hilton: Silica-reinforced rubber compounded with an organosilane tetrasulfide silica coupling agent at high mixing temperature. Bridgestone Corporation, Meredith E Palmer, Barbara Arndt, August 19, 2003: US06608145 (31 worldwide citation)

Sulfur-vulcanizable elastomeric compounds and pneumatic tire components having improved tensile mechanical and dynamic viscoelastic properties are produced by compounding polymers with silica at a temperature of 165° C. to about 200° C., in the presence of a silica dispersing agent, and a very small ...