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AssigneeThe Goodyear Tire & Rubber Company
InventorsAdel Farhan Halasa, Wen-Liang Hsu, Chad Aaron Jasiunas, John Robert Zuppo III, Laurie Elizabeth Austin
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The group IIa metal containing catalyst system of this invention can be utilized to synthesize rubbery polymers having a high trans microstructure by solution polymerization. Such rubbery polymers having a high trans microstructure content, such as polybutadiene rubber, styrene-isoprene-butadiene rubber, styrene-butadiene rubber, can be utilized in tire tread rubbers that exhibit improved wear and tear characteristics. This invention more specifically reveals a catalyst system which is comprised of (a) an organolithium compound, including organolithium functionalized compounds, (b) a group IIa metal salt selected from the group consisting of group IIa metal salts of di(alkylene glycol)alkylethers and group IIa metal salts of tri(alkylene glycol) alkylethers, and (c) an organoaluminum compound, and optionally an organomagnesium compound. The subject invention further discloses a process for synthesizing rubbery polymers having a high trans microstructure by a process that comprises polymerizing a conjugated diolefin monomer in an organic solvent in the presence of a catalyst system that is comprised of (a) an organolithium compound, (b) a group IIa metal salt selected from the group consisting of group IIa metal salts of amino glycols and group IIa metal salts of glycol ethers, and (c) an organoaluminum compound.
A catalyst system that is comprised of (a) an organolithium compound, (b) a group IIa metal salt selected from the group consisting of group IIa metal salts of amino alkyl glycols and group IIa metal salts of glycol alkylene ethers, and (c) an organometallic compound selected from the group consisting of organoaluminum compounds containing less than 13 carbon atoms and organomagnesium compounds.
A catalyst system as specified in claim 13 wherein n represents an integer from 2 to about 4, wherein m represents an integer from 2 to 8, wherein x represents an integer from 1 to 8, and wherein M represents a metal selected from the group consisting of strontium and barium.
A process for synthesizing rubbery polymers having a high trans microstructure by a process that comprises polymerizing a conjugated diolefin monomer in an organic solvent at a temperature that is within the range of about 40° C. to about 120° in the presence of a catalyst system that is comprised of (a) an organolithium compound, (b) a group IIa metal salt selected from the group consisting of group IIa metal salts of amino glycols and group IIa metal salts of glycol ethers, and (c) an organometallic compound selected from the group consisting of organoaluminum compounds and organomagnesium compounds.
A catalyst system that is comprised of (a) an organolithium compound, (b) a group IIa metal salt selected from the group consisting of group IIa metal salts of amino glycols and group IIa metal salts of glycol ethers, wherein the group IIa metal is selected from the group consisting of beryllium and magnesium, and (c) an organometallic compound selected from the group consisting of organoaluminum compounds and organomagnesium compounds.
A catalyst system that is comprised of (a) an organolithium compound, (b) a group IIa metal salt of an amino glycol, and (c) an organometallic compound selected from the group consisting of organoaluminum compounds and organomagnesium compounds.
A catalyst system that is comprised of (a) an organolithium compound, (b) a group IIa metal of N,N-dialkyl amino alkylethoxy ethanol, and (c) an organoaluminum compounds.
A catalyst system that is comprised of (a) an organolithium compound, (b) a group IIa metal salt of a di(ethylene glycol) alkyl ether, (c) an organoaluminum compounds, and (d) an amine containing from 1 to about 10 carbon atoms.
A catalyst system that is comprised of (a) an organolithium compound, (b) a group IIa metal salt of member selected from the group consisting of tri(ethylene glycol) alkyl ethers and tetra(ethylene glycol) alkyl ethers, (c) an organoaluminum compound.
A process for preparing a group IIa metal salt of an alkyl glycol ether that comprises reacting a group IIa metal hydroxide with the alkyl glycol ether at a temperature which is within the range of about 100° C. to about 200° C. in the presence of an aromatic organic solvent having a boiling point which is within the range of about 80° C. to about 280° C.
Dependencies are inferred from the claim text.