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

1995-05-22

1997-02-25

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...

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

Patent

active

056059795

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 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.

REFERENCES:
patent: 5191038 (1993-03-01), Krabbenhoft et al.

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