Process for producing styrenic polymer

Details Process for producing styrenic polymer Process for producing styrenic polymer

1996-03-29

1997-12-30

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526205, 526222, 526223, 5262181, 526346, C08F11208

Patent

active

057031843

ABSTRACT:
A process for producing a styrenic polymer having a wide-spread molecular weight distribution, which comprises polymerizing a styrenic monomer or a styrenic monomer and a monomer copolymerizable with the styrenic monomer in the presence of 50 to 5000 ppm by weight of at least one compound selected from compounds having a dithiocarbamate group and sulfide compounds having at least one of an aryl group, an arylalkyl group and a thiazole group based on the total monomer to a final conversion of 40% by weight or more in the absence or presence of a radical initiator subjecting to a suspension polymerization, a batchwise bulk polymerization or a continuous bulk polymerization using a plug flow type polymerization reactor. According to the present invention, there can be provided a simplified process for preparing a styrenic polymer having a wide-spread molecular weight distribution.

REFERENCES:
patent: 2813849 (1957-11-01), Kern
patent: 4956433 (1990-09-01), Mezger
Takayuki Otsu et al., Makromol. Chem., Rapid Commun., Role of Initiator-Transfer Agent-Terminator . . . , 3, pp. 127-132 (1982).
Takayuki Otsu et al., Polymer Bulletin, Living Radical Polymerizations . . . , 7, pp. 45-50 (1982).

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