Process for the preparation of expandable polystyrene

Details Process for the preparation of expandable polystyrene Process for the preparation of expandable polystyrene

1995-08-14

1997-01-07

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 59, 521 60, C08J 918, C08J 920

Patent

active

055917780

ABSTRACT:
The invention relates to a process for the preparation of bead shaped, expandable polystyrene by the polymerization of styrene in an aqueous suspension in the presence of dimeric .alpha.-methylstyrene as a regulator and a C.sub.3 to C.sub.6 hydrocarbon as a blowing agent, whereby one first reports the content of saturated hydrocarbons, having a boiling point between 70.degree. and 170.degree. C., in the styrene and dimeric .alpha.-methylstyrene, and then enough saturated hydrocarbons, having a boiling point from 70.degree. to 170.degree. C., are added before, during or after the polymerization so that their total content in the suspension is from 0.1 to 0.8 weight percent, based on the styrene.

REFERENCES:
patent: 4520135 (1985-05-01), Hahn et al.
patent: 5011863 (1991-04-01), Godfrin
patent: 5071882 (1991-12-01), Godfrin
patent: 5104903 (1992-04-01), Hahn et al.
patent: 5118718 (1992-06-01), Walter et al.
patent: 5173514 (1992-12-01), Hahn et al.
patent: 5177115 (1993-01-01), Hintz et al.
patent: 5262445 (1993-11-01), Hahn et al.
patent: 5266603 (1993-11-01), Holzmeler
patent: 5269987 (1993-12-01), Reedy et al.
patent: 5290819 (1994-03-01), Witt et al.

Affiliated with

Also associated with

Rating

Process for the preparation of expandable polystyrene does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of expandable polystyrene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of expandable polystyrene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1764773