Continuous process for producing rubber-modified methyl methacry

Details Continuous process for producing rubber-modified methyl methacry Continuous process for producing rubber-modified methyl methacry

1980-04-22

1981-09-01

Seccuro, Carman J.

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

Synthetic resins

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

525440, 525455, 525290, 525289, 525310, C08F25506, C08F26304, C08F26506, C08F27902

Patent

active

042873177

ABSTRACT:
A continuous process for producing rubber-modified methyl methacrylate syrups which comprises continuously supplying a material liquor comprising 1 to 20 parts by weight of a rubbery polymer dissolved in 100 parts by weight of a monomer comprising 60 to 100% by weight of methyl methacrylate, and a radical-polymerization initiator to the first reaction zone, continuously polymerizing at such a stationary conversion that the rubber polymer is dispersed in the form of particles form while maintaining the temperature and residence time in the zone so that a steady state is achieved in the zone and the steady-state concentration of the initiator in the zone is 1/2 to 1/1,000 time as much as the concentration of initiator supplied, continuously taking out the resulting reaction mixture from the zone, and passing it through the second reaction zone having a volume of 0 to 5 times as much as that of the first reaction zone, to obtain a stable syrup comprising a disperse phase and a continuous phase, the former phase being substantially a solution of the rubbery polymer in the monomer and the latter one being substantially a solution of the resinous polymer in the monomer, and a process for the production of methyl methacrylate cast sheets and molding materials having an excellent impact resistance from the syrups.

REFERENCES:
patent: 3234303 (1966-02-01), Bild et al.
patent: 3474081 (1969-10-01), Bosworth
patent: 3511895 (1970-05-01), Kydonieus
patent: 3637545 (1972-01-01), Fivel
patent: 3658946 (1972-04-01), Bronstert et al.
patent: 3671608 (1972-06-01), Meredith
patent: 3883616 (1975-05-01), Hozumi et al.
patent: 4046850 (1977-09-01), Kato et al.

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