Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1983-06-17
1984-06-05
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525375, 525379, 525382, 525384, 525385, 526173, 526336, C08F 840
Patent
active
044529520
ABSTRACT:
There is disclosed a process for the preparation of elastomeric polymers which comprises contacting at least one conjugated diolefinic monomer selected from the group consisting of isoprene, piperylene, 2-ethyl-1,3-butadiene, 2,3-dimethyl-1,3-butadiene and 1,3-butadiene, mixed with at least one polyvinyl aromatic coupling compound selected from the group consisting of o, m and p-divinylbenzene, 1,2,4-trivinylbenzene, 1,8-divinylnaphthalene, 1,2-divinyl-3,4-dimethylbenzene, 2,4-divinylbiphenyl, 3,5,4'-trivinylbiphenyl and 1,3,5-trivinylbenzene under solution polymerization conditions with an organolithium catalyst, in which the amount of polyvinyl aromatic coupling compound employed contains from about 0.1 to about 10 moles of vinyl groups per mole of active lithium catalyst used to produce a living polymer and then subsequently contacting said living polymer, with (A) a polar compound selected from the group consisting of ethylene glycol dimethyl ether (glyme), diethylene glycol dimethyl ether (diglyme), triethylene glycol dimethylether (triglyme), tetraethylene glycol dimethyl ether (tetraglyme), 2,3-dimethyoxybutane, N,N,N', N'tetramethylethylene-diamine (TMEDA), tri-n-butylphosphine and hexamethylphosphoric triamide (HMPA), in which the molar ratio of the said polar compounds to the active lithium based on the amount of said organolithium catalyst present at the start of the polymerization, ranges from about 0.01/1 to about 20/1 or (B) a polar compound selected from the group consisting of tetrahydrofuran, diethyl ether, triethylamine, 1,4-diazabicyclo-2.2.2-octane (DABCO), p-dioxane, tri-n-butylamine and N,N'-dimethyl piperazine, in which the molar ratio of the said compounds to the active lithium based on the amount of said organolithium catalyst present at the start of the polymerization, ranges from about 0.5/1 to about 100/1.
REFERENCES:
patent: 3363659 (1968-01-01), Keckler et al.
patent: 3639517 (1972-02-01), Kitchen et al.
patent: 3855189 (1974-12-01), Farrar et al.
patent: 3911054 (1975-10-01), Roest et al.
patent: 3931126 (1976-01-01), Naylor
patent: 3951931 (1976-04-01), Burchard et al.
patent: 4163764 (1979-08-01), Nash
patent: 4304886 (1981-12-01), Bean, Jr. et al.
Lipman Bernard
Rockhill Alvin T.
Schofer Joseph L.
The Goodyear Tire & Rubber Company
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