Method of making broader molecular weight distribution polystyre

Details Method of making broader molecular weight distribution polystyre Method of making broader molecular weight distribution polystyre

1975-12-30

1977-06-14

Wong, Jr., Harry

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526327, 526347, C08F21208

Patent

active

040298698

ABSTRACT:
Attempts to prepare polystyrene by peroxide-initiated suspension polymerization at 125.degree. C resulted in polymer having narrower molecular weight distribution than desired. The problem has been solved by copolymerizing the styrene with from 0.05 to 0.35 weight per cent, based on styrene, of a modifying comonomer consisting of a non-conjugated diolefinic compound having one very reactive olefinic group and one less reactive olefinic group such as, for example, allyl methacrylate.

REFERENCES:
patent: 2341175 (1944-02-01), Britton et al.
patent: 2912418 (1959-11-01), Johnson et al.
Chem. Abs. 54 (1960) p. 14158(b).

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