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

1994-04-28

1995-03-07

Seidleck, James J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525156, 525163, C08L 3308

Patent

active

053958845

ABSTRACT:
A novel process for coupling living polymers containing terminal (meth)acrylic units, which enables an increase in molecular weight and/or a defined multi-sequencing 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 bi-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>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(methyl methacrylate) macromonomers via anionic polymerizations".

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