Process for producing styrenic polymer

Details Process for producing styrenic polymer Process for producing styrenic polymer

1996-09-06

1998-03-03

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526219, 526220, 5262321, 526346, C08F 434, C08F 208

Patent

active

057235546

ABSTRACT:
There is provided a process for producing a styrenic polymer having a weight average molecular weight (Mw) of 200,000-500,000, a number average molecular weight (Mn) of 100,000-450,000 and a molecular weight distribution (Mw/Mn) of from 1.1 to 2 by free radical polymerization.
There is also provided a styrenic polymer, a styrenic resin composition comprising such polymer and a molded article comprising such composition.
Said styrenic polymer and said resin composition have excellent flowability during molding and also excellent mechanical strength.

REFERENCES:
patent: 5115055 (1992-05-01), Dias et al.
patent: 5115066 (1992-05-01), Zimmermann et al.
patent: 5312871 (1994-05-01), Mardare et al.
patent: 5401804 (1995-03-01), Georges et al.
"Molecular Weight Control by a `Living` Free-Radical Polymerization Process," by Craig J. Hawker, J. Am. Chem. Soc., 1994, 116, 11185-11186.
"Living Free-Radical Aqueous Polymerization," by Barkev Keoshkerian et al., Macromolecules, 1995, 28, 6381-6382.

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