Process for the continuous mass polymerization of polyblends hav

Details Process for the continuous mass polymerization of polyblends hav Process for the continuous mass polymerization of polyblends hav

1979-03-07

1981-03-03

Michl, Paul R.

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

Synthetic resins

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

C08F27902

Patent

active

042542367

ABSTRACT:
The invention relates to a continuous mass polymerization process for polyblends having a dispersed rubber phase with a bimodal rubber particle size distribution, wherein, first and second monomer-rubber solutions are fed to a first back-mixed polymerization zone such that said first solution forms particles of about 0.5 to 1.5 microns and said second solution, having present a dissolved rubber and a dissolved polymer of said monomer, forms particles of about 2 to 5 microns during partial polymerization of 10 to 50% of said monomers. Said partially polymerized solutions are further polymerized in a second zone, with linear flow, to a conversion of 20 to 95%, forming said polyblend with a bimodal rubber particle size distribution having improved toughness and gloss.

REFERENCES:
patent: 3398214 (1968-08-01), Roper
patent: 3509237 (1970-04-01), Aubrey
patent: 3509238 (1970-04-01), Aubrey
patent: 3652721 (1972-03-01), Dalton
patent: 3660535 (1972-05-01), Finch
patent: 3903202 (1975-09-01), Carter
patent: 3945976 (1976-03-01), McCurdy
patent: 4012462 (1977-03-01), Chaudhary

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