Expandable beads based on a polymer of a vinylaromatic compound

Details Expandable beads based on a polymer of a vinylaromatic compound Expandable beads based on a polymer of a vinylaromatic compound

1995-11-15

1997-11-11

Cooney, Jr., John M.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 60, 521146, C08J 918, C08J 920

Patent

active

056864973

ABSTRACT:
The present invention relates to expandable beads based on a polymer of a vinylaromatic compound containing a blowing agent and, in an amount of 0.1 up to 2% wt, preferably 0.3 up to 1.5% wt calculated on the beads, of a plasticizer that is based on oligomers of styrene and/or alpha-methylstyrene having a number-average molecular weight (M.sub.n) in the range of 200 to 500, preferably of 260 to 460; and a process for preparing these expandable beads.

REFERENCES:
patent: 3303159 (1967-02-01), Sanders
patent: 4459373 (1984-07-01), Mahn et al.
patent: 4520135 (1985-05-01), Hahn et al.
patent: 4525484 (1985-06-01), Mahn et al.
patent: 5104903 (1992-04-01), Hahn et al.

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