Method of grafting maleic anhydride to polymers

Details Method of grafting maleic anhydride to polymers Method of grafting maleic anhydride to polymers

1986-09-05

1988-08-09

Briggs, Sr., Wilbert 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 53, 525285, C08F25502

Patent

active

047628901

ABSTRACT:
Maleic anhydride can be satisfactorily grafted to polymers at low pressures by feeding the polymer through a co-rotating, twin-screw extruder and injecting the maleic anhydride and a free radical initiator into the extruder. The maleic anhydride and initiator can be pre-mixed in a solvent solution. The solvent and unreacted maleic anhydride can be removed by low pressure devolatilization.

REFERENCES:
patent: 3177270 (1965-04-01), Jones et al.
patent: 3658948 (1972-04-01), McConnell
patent: 3868443 (1975-02-01), Bartz et al.
patent: 3882194 (1975-05-01), Krebaum et al.
patent: 4010223 (1977-03-01), Caywood
patent: 4147740 (1979-03-01), Swiger et al.
patent: 4506056 (1985-03-01), Gaylord
patent: 4639495 (1987-01-01), Waggoner

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