Preparation of hydroxy-terminated conjugated diene polymers
AssigneeLithium Corporation of America
InventorsConrad W. Kamienski, Robert C. Morrison
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Abstract
Preparation of hydroxy-terminated conjugated diene polymers, particularly polybutadienes, by capping of organodilithium- and organopolylithium- terminated conjugated diene polymers or polybutadienes with lower alkylene oxide or epoxide capping agents in the presence of certain potentiating agents or catalysts exemplified particularly by small proportions of N,N,N.sup.1, N.sup.1 -tetramethylenediamine (TMEDA).
Claims22
In a process for preparing hydroxy-terminated conjugated diene polymers and copolymers wherein the polymerization or copolymerization is carried out in the presence of at least one organopolylithium initiator, and wherein said polymers or copolymers having terminal polymer or copolymer C-Li bonds are capped with a lower alkylene epoxide capping agent, the improvement which consists in carrying out said capping reaction in the presence of a small proportion of a tertiary amine characterized by its having from 2 to 4 nitrogen atoms separated from each other by a saturated aliphatic hydrocarbon group containing from 2 to 8 carbon atoms or by a cycloaliphatic hydrocarbon group having from 4 to 8 carbons.
Dependencies are inferred from the claim text.