Process for making anionic polymeric di-and polyfunctional polym

Details Process for making anionic polymeric di-and polyfunctional polym Process for making anionic polymeric di-and polyfunctional polym

1999-05-05

2000-08-15

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526176, 526177, 526178, 526181, C08F 3606, C08F 446

Patent

active

061038466

ABSTRACT:
The preparation of di- or polyfunctional polymers by anionic polymerization using functionalized initiators having the structure R.sup.1 R.sup.2 R.sup.3 Si--A--B, wherein each R is methyl and A is a hydrocarbon bridging group containing from 1 to 25 carbon atoms, and B is an alkali metal, is improved when polymerization occurs in the presence of a polymerization termination inhibitor which is a metal alkyl which has been added at a concentration to afford a molar ratio of the termination inhibitor to living polymer chain ends of about 0.1:1 to about 10:1.

REFERENCES:
patent: 3631006 (1971-12-01), Hawkins
patent: 5331058 (1994-07-01), Shepherd et al.
patent: 5376745 (1994-12-01), Handlin, Jr. et al.
patent: 5416168 (1995-05-01), Willis et al.

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