| Patent Number |
Title Of Patent |
Date Issued |
| 5629256 |
Catalyst system for the synthesis of rubbery polymers |
May 13, 1997 |
| The subject invention relates to an anionic polymerization technique for synthesizing rubbery polymers of conjugated diolefin monomers, such as rubbery copolymer of .alpha.-methylstyrene and 1,3-butadiene. These rubbery copolymers exhibit an excellent combination of properties for ut |
| 5627237 |
Tire tread containing 3.4-polyisoprene rubber |
May 6, 1997 |
| This invention reveals a pneumatic tire having an outer circumferential tread wherein said tread is a sulfur-cured rubber composition comprised of, based on 100 parts by weight of rubber, (1) from about 5 to about 50 parts of 3,4-polyisoprene rubber, wherein said 3,4-polyisoprene rubber |
| 5623035 |
Process for the synthesis of rubbery polymers |
April 22, 1997 |
| The subject invention relates to an anionic polymerization technique for synthesizing rubbery polymers of conjugated diolefin monomers, such as a rubbery copolymer of .alpha.-methylstyrene and 1,3-butadiene. These rubbery copolymers exhibit an excellent combination of properties for |
| 5620939 |
Initiative system |
April 15, 1997 |
| This invention reveals an initiator system which is comprised of (a) a lithium initiator, (b) a sodium alkoxide, and (c) a polar modifier; wherein the molar ratio of the sodium alkoxide to the polar modifier is within the range of about 0.1:1 to about 10:1; and wherein the molar ratio |
| 5616653 |
Coupled styrene-isoprene-butadiene rubber |
April 1, 1997 |
| The subject invention discloses a process for preparing a coupled styrene-isoprene-butadiene rubber which is particularly valuable for use in making automobile tire tread rubber compounds which comprises the steps of (1) solution terpolymerizing in an organic solvent from about 5 weight |
| 5612436 |
Isoprene-butadiene diblock rubber |
March 18, 1997 |
| The subject invention discloses an isoprene-butadiene diblock rubber which is particularly valuable for use in making treads for tires which have improved wear characteristics without compromising traction characteristics or rolling resistance. Said isoprene-butadiene diblock rubber |
| 5595951 |
Process for preparing a multilithio initiator for improved tire rubbers |
January 21, 1997 |
| The subject invention discloses a process for preparing an initiator which contains a plurality of lithium atoms and which is particularly useful for initiating the polymerization of diolefin monomers into rubbery polymers; said process being comprised of reacting an alkyl lithium compou |
| 5552490 |
Styrene-isoprene rubber for tire tread compounds |
September 3, 1996 |
| The subject invention relates to a technique for synthesizing rubbery copolymers of styrene and isoprene. These rubbery copolymers exhibit an excellent combination of properties for utilization in tire tread rubber compounds. By utilizing these styrene-isoprene rubbers in tire treads, |
| 5541264 |
Couple styrene-isoprene-butadiene rubber |
July 30, 1996 |
| The subject invention discloses a process for preparing a coupled styrene-isoprene-butadiene rubber which is particularly valuable for use in making automobile tire tread rubber compounds which comprises the steps of (1) solution terpolymerizing in an organic solvent from about 5 weight |
| 5534592 |
High performance blend for tire treads |
July 9, 1996 |
| This invention reveals a high performance polybutadiene rubber blend comprised of (a) a first polybutadiene rubber, (b) a second polybutadiene rubber, and (c) a third polybutadiene rubber; wherein the first polybutadiene rubber, the second polybutadiene rubber, and the third polybuta |
| 5514757 |
Coupled styrene-isoprene-butadiene rubber |
May 7, 1996 |
| The subject invention discloses a process for preparing a coupled styrene-isoprene-butadiene rubber which is particularly valuable for use in making automobile tire tread rubber compounds which comprises the steps of (1) solution terpolymerizing in an organic solvent from about 5 weight |
| 5514756 |
Coupled styrene-isoprene-butadiene rubber |
May 7, 1996 |
| The subject invention discloses a process for preparing a coupled styrene-isoprene-butadiene rubber which is particularly valuable for use in making automobile tire tread rubber compounds which comprises the steps of (1) solution terpolymerizing in an organic solvent from about 5 weight |
| 5502126 |
Process for the synthesis of isoprene butadiene rubber |
March 26, 1996 |
| The subject invention relates to a technique for synthesizing rubbery non-tapered, random, copolymers of 1,3-butadiene and isoprene. These rubbery copolymers exhibit an excellent combination of properties for utilization in tire sidewall rubber compounds for truck tires. By utilizing |
| 5491196 |
Halobutyl/solution polymerized SBR innerliner |
February 13, 1996 |
| The present invention relates to a tire innerliner and pneumatic tires containing the same, which are prepared from a composition comprising, based on 100 parts by weight of rubber, a blend containing 30 to about 50 parts by weight of a solution polymerized styrene-butadiene rubber havin |
| 5470929 |
Process for synthesizing styrene-isoprene rubber |
November 28, 1995 |
| The subject invention relates to a technique for synthesizing rubbery copolymers of styrene and isoprene. These rubbery copolymers exhibit an excellent combination of properties for utilization in tire tread rubber compounds. By utilizing these styrene-isoprene rubbers in tire treads, |
| 5448003 |
Synthesis of rubbery polymer using anionic polymerization modifier |
September 5, 1995 |
| It has been unexpectedly discovered that various compounds, such as alkyl tetrahydrofurfuryl ethers, can be used to modify anionic polymerizations of conjugated diene monomers. These modifiers can be used to polymerize isoprene monomer into high 3,4-polyisoprene at excellent polymerizati |
| 5422403 |
Coupled styrene-isoprene-butadiene rubber |
June 6, 1995 |
| The subject invention discloses a process for preparing a coupled styrene-isoprene-butadiene rubber which is particularly valuable for use in making automobile tire tread rubber compounds which comprises the steps of (1) solution terpolymerizing in an organic solvent from about 5 weight |
| 5405927 |
Isoprene-butadiene rubber |
April 11, 1995 |
| The subject invention discloses an isoprenebutadiene rubber which is particularly valuable for use in making truck tire treads, said rubber being comprised of repeat units which are derived from about 20 weight percent to about 50 weight percent isoprene and from about 50 weight perc |
| 5405815 |
Process for preparing a catalyst system useful in the synthesis of isoprene-butadiene rubber |
April 11, 1995 |
| The subject invention relates to a technique for synthesizing rubbery non-tapered, random, copolymers of 1,3-butadiene and isoprene. These rubbery copolymers exhibit an excellent combination of properties for utilization in tire sidewall rubber compounds for truck tires. By utilizing |
| 5359016 |
Process for the synthesis of styrene-isoprene rubber |
October 25, 1994 |
| The subject invention relates to a technique for synthesizing rubbery copolymers of styrene and isoprene. These rubbery copolymers exhibit an excellent combination of properties for utilization in tire tread rubber compounds. By utilizing these styrene-isoprene rubbers in tire treads, |
| 5356997 |
Tire tread compound made with strain crystallizable 3,4-polyisoprene |
October 18, 1994 |
| Strain crystallizable 3,4-polyisoprene having a 3,4-microstructure content which is within the range of about 65% to about 85%, a cis-1,4-microstructure content which is within the range of about 15% to about 35%, and essentially no trans-1,4-microstructure or 1,2-microstructure can |
| 5336739 |
Alkyl tetrahydrofurfuryl ethers as anionic polymerization modifier in the synthesis of rubbery p |
August 9, 1994 |
| It has been unexpectedly discovered that various compounds, such as alkyl tetrahydrofurfuryl ethers, can be used to modify anionic polymerizations of conjugated diene monomers. These modifiers can be used to polymerize isoprene monomer into high 3,4-polyisoprene at excellent polymerizati |
| 5321085 |
High modulus rubber composition |
June 14, 1994 |
| It is desirable to increase the modulus of rubbers utilized in a wide variety of applications. This invention discloses a technique for preparing high modulus rubber compositions. By utilizing this technique, high modulus can be attained without sacrificing other properties, such as |
| 5317062 |
Styrene-isoprene-butadiene rubber |
May 31, 1994 |
| 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 percen |
| 5307850 |
Pneumatic tire containing syndiotactic 1,2-polybutadiene |
May 3, 1994 |
| The subject invention discloses a pneumatic rubber tire comprised of a toroidal shaped fabric-reinforced rubber carcass and an outer circumferential rubber tread, two spaced substantially inextensible beads and two sidewalls extending radially from and connecting said tread to said b |
| 5300599 |
Modifier for anionic polymerization of diene monomers |
April 5, 1994 |
| It has been unexpectedly discovered that salts of tetrahydrofurfuryl alcohols, such as the lithium, potassium, and sodium salts of tetrahydrofuryl alcohols, can be used to modify anionic polymerizations of conjugated diene monomers. These modifiers can be used to polymerize isoprene |
| 5284927 |
Process for preparing a rubbery terpolymer of styrene, isoprene and butadiene |
February 8, 1994 |
| 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, |
| 5283294 |
Inverse phase polymerization |
February 1, 1994 |
| It is sometimes advantageous to disperse crystalline polymers throughout rubbery elastomers. For instance, the cold flow characteristics and green strength of polydiene rubbers can be improved by dispersing syndiotactic-1,2-polybutadiene therein. This invention discloses a process fo |
| 5283291 |
High modulus rubber composition |
February 1, 1994 |
| It is desirable to increase the modulus of rubbers utilized in a wide variety of applications. This invention discloses a technique for preparing high modulus rubber compositions. By utilizing this technique, high modulus can be attained without sacrificing other properties, such as |
| 5272220 |
Process for preparing styrene-isoprene-butadiene rubber |
December 21, 1993 |
| 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 percen |
| 5262213 |
Styrene-butadiene rubber for truck tires |
November 16, 1993 |
| The subject invention discloses a styrene-butadiene rubber (SBR) which is particularly valuable for use in making truck tire treads, said rubber being comprised of repeat units which are derived from about 10 weight percent to about 20 weight percent styrene and from about 80 weight |
| 5254653 |
Terpolymer rubber of styrene, isoprene and butadiene |
October 19, 1993 |
| 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. |
| 5239023 |
Process for the synthesis of crystallizable 3,4-polyisoprene and isoprene-butadiene copolymers h |
August 24, 1993 |
| Crystallizable 3,4-polyisoprene and isoprene-butadiene copolymers having high vinyl contents can be synthesized in organic solvents to quantitative yields after short polymerization times by utilizing the catalyst systems of this invention. The 3,4-polyisoprene made utilizing this cataly |
| 5239009 |
High performance segmented elastomer |
August 24, 1993 |
| It is highly desirable for tire treads to exhibit good traction characteristics such as good wet skid resistance. However, it has traditionally been very difficult to improve the traction characteristics of a tire without sacrificing rolling resistance and tread wear. The high perfor |
| 5231153 |
Anionic polymerization of conjugated dienes modified with alkyltetrahydrofurfuryl ethers |
July 27, 1993 |
| It has been unexpectedly discovered that various compounds, such as alkyl tetrahydrofurfuryl ethers, can be used to modify anionic polymerizations of conjugated diene monomers. These modifiers can be used to polymerize isoprene monomer into high 3,4-polyisoprene at excellent polymerizati |
| 5202387 |
Elastomer with outstanding characteristics for use in making tire tread compounds |
April 13, 1993 |
| It is highly desirable for tire treads to exhibit good traction characteristics such as good wet skid resistance. However, it has traditionally been very difficult to improve the traction characteristics of a tire without sacrificing rolling resistance and tread wear. The high perfor |
| 5191021 |
Tire with tread containing styrene, isoprene, butadiene terpolymer rubber |
March 2, 1993 |
| 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 observ |
| 5173550 |
Synthesis of random styrene-isoprene rubbers |
December 22, 1992 |
| The subject invention relates to a process for synthesizing random styrene-isoprene copolymers having a medium vinyl microstructure. These random styrene-isoprene rubbers have physical properties which make them highly desirable for utilization in tire tread rubber compounds. The uti |
| 5159020 |
Tire with tread comprising styrene, isoprene, butadiene terpolymer rubber |
October 27, 1992 |
| 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. |
| 5151398 |
Catalyst for the synthesis of crystalline 3,4-polyisoprene |
September 29, 1992 |
| Crystallizable 3,4-polyisoprene can be synthesized in organic solvents to quantitative yields after short polymerization times by utilizing the catalyst systems of this invention. The 3,4-polyisoprene made utilizing this catalyst system is strain crystallizable and can be employed in tir |
| 5137998 |
Process for preparing a rubbery terpolymer of styrene, isoprene and butadiene |
August 11, 1992 |
| 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, |
| 5100965 |
Process for synthesizing high trans polymers |
March 31, 1992 |
| The process of this invention can be utilized to synthesize polymers having a high trans microstructure. The polymers which can be prepared utilizing the procedure of this invention include high trans-1,4-polybutadiene, styrene-isoprene-butadiene terpolymers with high trans-1,4-polybutad |
| 5082906 |
Catalyst for the synthesis of crystalline 3,4-polyisoprene |
January 21, 1992 |
| Crystallizable 3,4-polyisoprene can be synthesized in organic solvents to quantitative yields after short polymerization times by utilizing the catalyst systems of this invention. The 3,4-polyisoprene made utilizing this catalyst system is strain crystallizable and can be employed in tir |
| 5070148 |
Segmented elastomer |
December 3, 1991 |
| It is important for tire treads to exhibit good wet skid resistance, low rolling resistance, good wear characteristics and good abrasion resistance. This is often accomplished by utilizing a blend of various rubbers in making tire tread compositions. However, some of the desirable ch |
| 5061765 |
Process for the synthesis of a high vinyl isoprene-butadiene copolymer |
October 29, 1991 |
| Isoprene-butadiene copolymers having high vinyl contents can be synthesized in organic solvents to high yields after short polymerization times by utilizing the process of this invention. The isoprene-butadiene copolymers made utilizing the process of this invention have a glass transiti |
| 5049620 |
High modulus rubber composition |
September 17, 1991 |
| It is desirable to increase the modulus of rubbers utilized in a wide variety of applications. This invention discloses a technique for preparing high modulus rubber compositions. By utilizing this technique, high modulus can be attained without sacrificing other properties, such as |
| 5047483 |
Pneumatic tire with tread of styrene, isoprene, butadiene rubber |
September 10, 1991 |
| 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 observ |
| 5037912 |
Polymerization of 1,3-butadiene to trans-1,4-polybutadiene with organolithium and alkali metal a |
August 6, 1991 |
| Trans-1,4-polybutadiene is a thermoplastic resin rather than a rubber at room temperature by virtue of its high degree of crystallinity. Because trans-1,4-polybutadiene contains many double bonds in its backbone, it can be blended and cocured with rubbers. It is accordingly an attractive |
| 4997896 |
Process and catalyst system for synthesizing trans-1,4-polybutadiene |
March 5, 1991 |
| Trans-1,4-polybutadiene is a thermoplastic resin rather than a rubber at room temperature by virtue of its high degree of crystallinity. Because trans-1,4-polybutadiene contain many double bonds in its backbone, it can be blended and cocured with rubbers. It is accordingly an attractive |
| 4935471 |
Capped polydienes |
June 19, 1990 |
| 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 i |
