Method for preparing ABS type resin

Details Method for preparing ABS type resin Method for preparing ABS type resin

1978-07-14

1980-06-03

Hamrock, William F.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525383, C08F27904

Patent

active

042062934

ABSTRACT:
This invention relates to an improved process for preparing ABS resins wherein a alkadiene rubber is grafted in aqueous emulsion with styrene and nitrile type monomers, forming a grafted rubber, extracting said grafted rubber into a monomer phase and separating said monomer-grafted rubber phase from said aqueous phase followed by mass polymerizing said grafted rubber-monomer phase to form an ABS polyblend, wherein the improvement comprises, carrying out the mass polymerization of said monomers in the presence of sufficient carbon dioxide to provide an ABS resin having a substantially white color.

REFERENCES:
patent: 3040012 (1962-06-01), Maeder
patent: 3950455 (1976-04-01), Okamoto et al.
patent: 3957912 (1976-05-01), Cincera

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