Process for preparing polymeric material with microwave

Details Process for preparing polymeric material with microwave Process for preparing polymeric material with microwave

1992-08-18

1995-11-28

Leung, Philip H.

Electric heating

Microwave heating

Field modification

219693, 219695, 264474, 264489, 20415743, H05B 678

Patent

active

054710375

ABSTRACT:
Process and apparatus, in which a stream of liquid reactants is heated in a resonant microwave cavity operating in a TM.sub.0n0 mode and then provided with sufficient time in an annular plug flow reactor to complete the reaction results in improved time-temperature uniformity for all volume elements of the stream and are particularly suited for production of polyurethane prepolymer. A special cleaning method is provided for removing polymeric residues from the equipment with a solution of a monofunctional secondary amine in an organic solvent.

REFERENCES:
patent: 3461261 (1969-08-01), Lewis et al.
patent: 3486865 (1969-12-01), Furusawa et al.
patent: 3715555 (1973-02-01), Johnson
patent: 4144434 (1979-03-01), Chiron et al.
patent: 4276462 (1981-06-01), Risman
patent: 4424301 (1984-01-01), Klippert et al.
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patent: 4760230 (1988-07-01), Hassler
patent: 4883570 (1989-11-01), Efthimion et al.
patent: 5069928 (1991-12-01), Echizen et al.
Risman et al, "Theory For and Experiments With a TM.sub.02n Applicator" J. Microwave Power, 10(3), 271-280 (1975).

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