1
Adel F Halasa, Bill B Gross, Joel L Cox, George F Balogh: Rubber composition. The Goodyear Tire & Rubber Company, Alvin T Rockhill, June 27, 1989: US04843120 (92 worldwide citation)

It has been determined that certain rubbery polymers having multiple glass transition temperatures can be utilized in making tires which have improved rolling resistance, improved wet skid resistance, and outstanding tread wear. These rubbery polymers are derived from at least one conjugated diolefi ...


2
Adel F Halasa, Barry A Matrana, Sylvia E Robertson Wilcox: Capped polydienes. The Goodyear Tire & Rubber Company, Alvin T Rockhill, June 19, 1990: US04935471 (81 worldwide citation)

Polydiene rubbers are commonly compounded with carbon black in making a wide variety of rubber articles including tires, hoses and belts. It is generally desirable for the carbon black to be well dispersed throughout the polydiene in order to attain optimal physical properties. For instance, the tra ...


3
Adel F Halasa, David W Carlson, James E Hall: Thermoplastic elastomer blends of alpha-olefin polymers and hydrogenated medium and high vinyl butadiene polymers. The Firestone Tire & Rubber Company, October 7, 1980: US04226952 (80 worldwide citation)

Thermoplastic elastomer blends of alpha-olefin polymers and copolymers, such as polypropylene, polyethylene, etc., having a melting point of at least 90.degree. C. with hydrogenated butadiene medium and high vinyl polymers have good physical properties such as low brittle point, good impact resistan ...


4
Adel F Halasa, James E Hall, Adolph Para: Process for the preparation of block copolymers. The Firestone Tire & Rubber Company, August 26, 1980: US04219627 (65 worldwide citation)

The process described herein involves the preparation of block copolymers of the S-B-S type wherein S represents a block of polystyrene and B represents a block of polybutadiene. In order to have the initial polystyrene block soluble in the polymerization medium, cyclohexane and aromatic hydrocarbon ...


5
Adel F Halasa, David W Carlson, James E Hall: Hydrogenated block copolymers of butadiene containing a block of 1,4 and a block of 1,2-microstructure. The Firestone Tire & Rubber Company, December 2, 1980: US04237245 (50 worldwide citation)

The composition described herein is a hydrogenated polymer derived from a butadiene diblock copolymer having 85-100%, preferably 95-100% 1,2-structure in one block and the other block comprising essentially 1,4-butadiene. The 1,2-block comprises at least 10%, preferably at least 25%, of the total we ...


6
Adel F Halasa, David P Tate: Process for polylithiating unsaturated polymers. The Firestone Tire & Rubber Company, August 24, 1976: US03976628 (46 worldwide citation)

A polymer is metalated with a lithiating reagent and an tetraalkylethylene, the ratio of active lithium atoms in the lithiating reagent to the molecules of the amine being from 0.01 to 1.5. Such lithiated polymer may then be further reacted to introduce reactive groups of many varieties along the po ...


7
Adel F Halasa, Jean Bergh, Fernand A J Fourgon: Pneumatic tire with tread of styrene, isoprene, butadiene rubber. The Goodyear Tire & Rubber Company, Henry C Young Jr, September 10, 1991: US05047483 (45 worldwide citation)

A styrene, isoprene, butadiene terpolymer rubber with a characterization according to its glass transition temperatures and unit structure and a pneumatic tire with a tread composed of such terpolymer rubber specifically in combination with selected other rubber which has been observed to provide su ...


8
Adel F Halasa, James E Hall: Polymerization catalyst and process for polymerizing dienes therewith. The Firestone Tire & Rubber Company, January 27, 1981: US04247418 (43 worldwide citation)

The catalyst system disclosed herein comprises a combination or a chelate of a hydrocarbyl lithium compound with a bicyclic amine compound bridged together through nitrogen in each cyclic ring by means of 1-4, preferably 2-4 carbon atoms and each cyclic ring having at least one nitrogen and at least ...


9
Michael B Rodgers, Stanley M Mezynski, Adel F Halasa, Wen Liang Hsu, Barry A Matrana, Joel L Cox: Process for preparing styrene-isoprene-butadiene rubber. The Goodyear Tire & Rubber Company, Alvin T Rockhill, December 21, 1993: US05272220 (41 worldwide citation)

The subject invention discloses a styrene-isoprene-butadiene rubber which is particularly valuable for use in making truck tire treads, said rubber being comprised of repeat units which are derived from about 5 weight percent to about 20 weight percent styrene, from about 7 weight percent to about 3 ...


10
Wen Liang Hsu, Adel F Halasa: Process for preparing a rubbery terpolymer of styrene, isoprene and butadiene. The Goodyear Tire & Rubber Company, Alvin T Rockhill, August 11, 1992: US05137998 (40 worldwide citation)

The subject invention relates to a technique for synthesizing rubbery terpolymers of styrene, isoprene and butadiene. These rubbery terpolymers exhibit an excellent combination of properties for utilization in tire tread rubber compounds. By utilizing such terpolymers in tire treads, tires having im ...