Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1977-06-24
1978-08-15
Garvin, Patrick P.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252428, 252430, 252431R, 252431C, 252431N, 526187, C08F 408, C08F 452
Patent
active
041070810
ABSTRACT:
The catalyst system disclosed herein comprises one suitable for the polymerization of a conjugated diene, which system comprises a trihydrocarbyl aluminum compound, in which the hydrocarbyl group is an alkyl, aryl or cycloalkyl radical of 1-10 carbon atoms, and an alkali metal compound of the formula M--Y--R wherein M represents Li, Na or K; Y represents O, S or NR.sup.1 ; R represents H or a hydrocarbyl group of 1-10 carbon atoms; R.sup.1 represents a hydrocarbyl group of 1-10 carbon atoms, an acyl group of 1-10 carbon atoms; and when Y is NR.sup.1 the R and R.sup.1 can represent divalent groups so that together they form, with the N, a cyclic radical such as piperdyl, morpholino or diethylene diamino. Lithium alkoxides are preferred forms of the MYR formula and Al(CH.sub.3).sub.3 and Al(C.sub.2 H.sub.5).sub.3 are preferred aluminum components.
REFERENCES:
patent: 3285894 (1966-11-01), Lim et al.
patent: 3631006 (1971-12-01), Hawkins
patent: 3852309 (1974-12-01), Simmons et al.
patent: 3894075 (1975-07-01), Schoen
Halasa Adel Farhan
Hall James Edward
Garvin Patrick P.
The Firestone Tire & Rubber & Company
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