Process for manufacturing multisequence star or network polycond

Details Process for manufacturing multisequence star or network polycond Process for manufacturing multisequence star or network polycond

1993-01-11

1994-09-13

Seidleck, James J.

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

Synthetic resins

Ethylenically unsaturated reactant admixed with either...

525156, 525163, C08L 3304, C08L 6100, C08K 507

Patent

active

053469569

ABSTRACT:
A novel process for coupling living polymers containing terminal (meth)acrylic units, which enables an increase in molecular weight and/or a defined multisequencing and/or a star structure with a defined number of branches, is disclosed. The disclosed process comprises the steps of: (i) anionic polymerization using an initiator system consisting of a functional initiator and a ligand to obtain a living polymer containing living terminal (meth)acrylics units; (ii) reacting it with an aldehyde compound of formula R--(CHO).sub.r in which r.gtoreq.2; and (iii) recovering the final polycondensate by means known per se.

REFERENCES:
patent: 3639521 (1972-02-01), Hsieh
patent: 3778490 (1973-12-01), Hsieh
Polymer Preprints, vol. 29, No. 2, Sep. 1988 pp. 48-49, S. D. Smith, "Synthesis of Poly(methylmethacrylate) Macromonomers via Anionic Polymerization".

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