Polymerisation of olefinic-containing monomers employing anionic

Details Polymerisation of olefinic-containing monomers employing anionic Polymerisation of olefinic-containing monomers employing anionic

1993-10-29

1994-11-08

Pal, Asok

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

556465, B01J 3100

Patent

active

053626990

ABSTRACT:
Process for anionically polymerizing a conjugated 1,3-diene monomer consists of contacting the monomer in an inert hydrocarbon solvent with a monofunctional silyl ether initiator of general formula R.sup.1 R.sup.2 R.sup.3 Si--O--A--Li where R.sup.1 to R.sup.3 are independently selected from monovalent organic substituent groups and A is a short chain hydrocarbon bridging group, to yield a polydiene having a molecular weight of typically 1,000-10,000, a high 1.4 content of typically 90% and a low polydispensity of typically 1.15. The reactive ends of the living polymer chains may be terminated with a reactive group such as hydroxyl by treating the polymer with ethylene oxide. Subsequent removal of the polymer's relatively unreactive silyl end groups by reaction with tetra-n-butylammonium fluoride produces a difunctional, chain-extendable, hydroxy-terminated polydiene useful as a rubbery binder prepolymer.

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