Devolatilization of anhydride polymers

Details Devolatilization of anhydride polymers Devolatilization of anhydride polymers

2009-03-09

2010-06-15

Teskin, Fred M (Department: 1796)

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

Synthetic resins

Treating polymer containing material or treating a solid...

C528S501000, C526S075000, C526S272000, C526S318000

Reexamination Certificate

active

07737249

ABSTRACT:
The present invention relates to the formation of low volatile anhydride-containing aromatic vinyl polymers by polymerizing the half ester of the anhydride with a vinyl aromatic monomer followed by devolatilizing the half-ester and reforming the anhydride at elevated temperatures and reduced pressures.

REFERENCES:
patent: 3437643 (1969-04-01), Zimmerman
patent: 3509110 (1970-04-01), Giulio et al.
patent: 3536787 (1970-10-01), Street
patent: 3919354 (1975-11-01), Moore
patent: 3987235 (1976-10-01), Fujimoto
patent: 4954303 (1990-09-01), Moore
patent: 5380822 (1995-01-01), Skilbeck
E R Moore Properties of Styrene MaleicAnhydride Copolymers, Ind. Eng. Chem. Prod. Res, Dev, 25, 315-321 1986.

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