Process for obtaining narrow molecular weight distribution in vi

Details Process for obtaining narrow molecular weight distribution in vi Process for obtaining narrow molecular weight distribution in vi

1984-05-10

1987-12-15

Henderson, Christopher

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

Synthetic resins

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

526 83, 526 84, 526 85, C08F 240

Patent

active

047134216

ABSTRACT:
In a process for the mass polymerization of vinyl aromatic monomer wherein vinyl aromatic monomer is polymerized in successive stages of increasing temperature, the improvement which narrows the molecular weight distribution of the resulting polymer comprising incorporating a polymerization inhibiting agent into a polymerizing mass at a point where about 60 to about 95% of monomer is converted to polymer.

REFERENCES:
patent: 2225471 (1940-12-01), Foord
patent: 2563997 (1951-08-01), Elwell
patent: 3084143 (1963-04-01), Hieserman
patent: 3110706 (1963-11-01), Vollmert
patent: 3131033 (1964-04-01), Volkenburgh

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