Preparation of homogeneous polymers using supercritical fluid so

Details Preparation of homogeneous polymers using supercritical fluid so Preparation of homogeneous polymers using supercritical fluid so

1995-01-30

1996-10-22

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...

525 64, 525 69, 525 70, 525 72, 525 77, 525 78, 525 79, 525 80, 525 86, 525 87, 525 88, 525 89, 525 92B, 525 93, 525 94, 525 95, 525 96, 525 98, 525 99, C08G 6348, C08L 5108

Patent

active

055677690

ABSTRACT:
Homogeneous polymer blends are prepared from otherwise thermodynamically immiscible polymers, especially including block copolymers. Thus, polymers such as polystyrene/poly(methyl methacrylate) block copolymer or polystyrene/poly(1,2-butadiene) block copolymer are dissolved under pressure in supercritical fluid solvents such as chlorodifluoromethane and n-butane, respectively, and expanded through a fine nozzle. As the SCF solvent evaporates, the polymer deposits as a substantially homogeneous material.

REFERENCES:
patent: 5412027 (1995-05-01), Shine et al.

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