Precipitation of homogeneous polymer mixtures from supercritical

Details Precipitation of homogeneous polymer mixtures from supercritical Precipitation of homogeneous polymer mixtures from supercritical

1991-03-27

1994-03-01

Kight, III, John

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

Synthetic resins

Processes of preparing a desired or intentional composition...

525228, 525227, 525230, 525231, 525232, 525233, C08K 501, C08K 502

Patent

active

052908275

ABSTRACT:
Homogeneous polymer blends are prepared from otherwise thermodynamically immiscible polymers. Thus, mixtures of polymers such as poly (methyl methacrylate) and poly (ethyl methacrylate) are dissolved under pressure in supercritical fluid solvents such as chlorodifluoromethane and expanded through a fine nozzle. As the SCF solvent evaporates, the polymer mixture deposits as a substantially homogeneous blend.

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