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

C - Chemistry, Metallurgy

08

G

C08G 63/91 (2006.01) C08G 63/64 (2006.01) C08G 64/14 (2006.01) C08G 64/30 (2006.01) C08G 64/40 (2006.01)

Patent

CA 2172679

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 cyclic 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 carbonate which may include any of a variety of functional groups may, by the inventive process, be inserted into the structure of the polymer, effecting a modification to the structure and the properties of the resin. Among the disclosed beneficial modifications thus imparted to the resin are improved thermal stability, altered rheology and optical properties.

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