Process for polylithiating unsaturated polymers

Details Process for polylithiating unsaturated polymers Process for polylithiating unsaturated polymers

1970-01-06

1976-08-24

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260880B, 526 26, 526 49, 526 50, 526335, 526340, C08F 832

Patent

active

039766284

ABSTRACT:
A polymer is metalated with a lithiating reagent and an tetraalkylethylene, the ratio of active lithium atoms in the lithiating reagent to the molecules of the amine being from 0.01 to 1.5. Such lithiated polymer may then be further reacted to introduce reactive groups of many varieties along the polymer chain. For example, polybutadiene, polyisoprene and other unsaturated polymers may be reacted with butyl lithium and triethylene diamine; and the lithiated polymer may then be reacted with carbon dioxide, and the resulting product may be neutralized to produce a polymer containing carboxyl groups, or the lithiated polymer may be reacted with styrene or a mixture of styrene and butadiene, or styrene and isoprene, etc.

REFERENCES:
patent: 3451988 (1969-06-01), Langer
patent: 3492369 (1970-01-01), Naylor

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