1,1,1 Tris-(4-isopropenyl-phenyl)ethane

Details 1,1,1 Tris-(4-isopropenyl-phenyl)ethane 1,1,1 Tris-(4-isopropenyl-phenyl)ethane

1979-04-05

1980-11-25

O'Keefe, Veronica

Chemistry of hydrocarbon compounds

Compound or reaction product mixture

Aromatic

585 26, 585436, 585437, C07C 1512

Patent

active

042360358

ABSTRACT:
New organo-lithium initiators, their synthesis, and their use. The initiators have the formula: ##STR1## in which R" is either a hydrogen atom or a methyl radical; either n is 1, in which case R' = H and m and p are integers, the sum of which is between 0 and 10 inclusive, or n is 2, R' then being an alkyl radical of 2 to 8 carbon atoms and m =p =0; and R is an alkyl radical of 1 to 4 carbon atoms.
The initiators are prepared by reacting compounds of the formula: ##STR2## with an alkyl-lithium RLi in a non-polar solvent in the absence of any polar solvent or complexing agent.
The initiators are used to prepare polydienes of high stereoregularity by reacting with a diene, and the polydiene is used to prepare a three-block or star copolymer by reacting with an anionically polymerizable monomer.

REFERENCES:
patent: 2454779 (1948-11-01), Davidson et al.
patent: 2578479 (1951-12-01), Jennings
patent: 2957036 (1960-10-01), Markus
patent: 3810879 (1974-05-01), Hay
patent: 4161494 (1979-07-01), Sigwalt et al.

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