Method for modifying the backbone of polymeric resins

Details Method for modifying the backbone of polymeric resins Method for modifying the backbone of polymeric resins

1996-12-13

1997-12-02

Acquah, Samuel A.

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

Synthetic resins

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

524779, 524783, 524784, 524785, 525437, 525439, 525466, C08F 2000

Patent

active

056937229

ABSTRACT:
A process is disclosed whereby a polymeric resin (containing ester and/or carbonate bonds) is readily converted into a resin having a modified molecular structure. Accordingly, a polycyclic carbonate (a monomer or oligomer) is transesterified with the polymer resin in the melt, preferably upon extrusion, optionally in the presence of a catalyst. Significantly, the cyclic carbonates are, by the inventive process, inserted into the structure of the polymer, effecting branching of the molecular structure, a branching which manifests itself in the modified properties of the resin.

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